Struct Gizmos

SystemParam

pub struct Gizmos<'w, 's, Config = DefaultGizmoConfigGroup, Clear = ()>
where
    Config: GizmoConfigGroup,
    Clear: 'static + Send + Sync,
{
    pub config: &'w GizmoConfig,
    pub config_ext: &'w Config,
    /* private fields */
}

A SystemParam for drawing gizmos.

They are drawn in immediate mode, which means they will be rendered only for the frames, or ticks when in FixedMain, in which they are spawned.

A system in Main will be cleared each rendering frame, while a system in FixedMain will be cleared each time the RunFixedMainLoop schedule is run.

Gizmos should be spawned before the Last schedule to ensure they are drawn.

To set up your own clearing context (useful for custom scheduling similar to FixedMain):

use bevy_gizmos::{prelude::*, *, gizmos::GizmoStorage};
struct ClearContextSetup;
impl Plugin for ClearContextSetup {
    fn build(&self, app: &mut App) {
        app.init_resource::<GizmoStorage<DefaultGizmoConfigGroup, MyContext>>()
           // Make sure this context starts/ends cleanly if inside another context. E.g. it
           // should start after the parent context starts and end after the parent context ends.
           .add_systems(StartOfMyContext, start_gizmo_context::<DefaultGizmoConfigGroup, MyContext>)
           // If not running multiple times, put this with [`start_gizmo_context`].
           .add_systems(StartOfRun, clear_gizmo_context::<DefaultGizmoConfigGroup, MyContext>)
           // If not running multiple times, put this with [`end_gizmo_context`].
           .add_systems(EndOfRun, collect_requested_gizmos::<DefaultGizmoConfigGroup, MyContext>)
           .add_systems(EndOfMyContext, end_gizmo_context::<DefaultGizmoConfigGroup, MyContext>)
           .add_systems(
               Last,
               propagate_gizmos::<DefaultGizmoConfigGroup, MyContext>.before(UpdateGizmoMeshes),
           );
    }
}

Fields

config: &'w GizmoConfig

The currently used GizmoConfig

config_ext: &'w Config

The currently used GizmoConfigGroup

Methods from Deref<Target = GizmoBuffer<Config, Clear>>

pub fn arc_2d( &mut self, isometry: impl Into<Isometry2d>, arc_angle: f32, radius: f32, color: impl Into<Color>, ) -> Arc2dBuilder<'_, Config, Clear>

Draw an arc, which is a part of the circumference of a circle, in 2D.

This should be called for each frame the arc needs to be rendered.

Arguments

• isometry defines the translation and rotation of the arc.
  • the translation specifies the center of the arc
  • the rotation is counter-clockwise starting from Vec2::Y
• arc_angle sets the length of this arc, in radians.
• radius controls the distance from position to this arc, and thus its curvature.
• color sets the color to draw the arc.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_4, 1., GREEN);

    // Arcs have 32 line-segments by default.
    // You may want to increase this for larger arcs.
    gizmos
        .arc_2d(Isometry2d::IDENTITY, FRAC_PI_4, 5., RED)
        .resolution(64);
}

Examples found in repository

examples/gizmos/2d_gizmos.rs (lines 98-103)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn arc_3d( &mut self, angle: f32, radius: f32, isometry: impl Into<Isometry3d>, color: impl Into<Color>, ) -> Arc3dBuilder<'_, Config, Clear>

Draw an arc, which is a part of the circumference of a circle, in 3D. For default values this is drawing a standard arc. A standard arc is defined as

• an arc with a center at Vec3::ZERO
• starting at Vec3::X
• embedded in the XZ plane
• rotates counterclockwise

This should be called for each frame the arc needs to be rendered.

Arguments

• angle: sets how much of a circle circumference is passed, e.g. PI is half a circle. This value should be in the range (-2 * PI..=2 * PI)
• radius: distance between the arc and its center point
• isometry defines the translation and rotation of the arc.
  • the translation specifies the center of the arc
  • the rotation is counter-clockwise starting from Vec3::Y
• color: color of the arc

Builder methods

The resolution of the arc (i.e. the level of detail) can be adjusted with the .resolution(...) method.

Example

fn system(mut gizmos: Gizmos) {
    // rotation rotates normal to point in the direction of `Vec3::NEG_ONE`
    let rotation = Quat::from_rotation_arc(Vec3::Y, Vec3::NEG_ONE.normalize());

    gizmos
       .arc_3d(
         270.0_f32.to_radians(),
         0.25,
         Isometry3d::new(Vec3::ONE, rotation),
         ORANGE
         )
         .resolution(100);
}

Examples found in repository

examples/gizmos/3d_gizmos.rs (lines 175-183)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

pub fn short_arc_3d_between( &mut self, center: Vec3, from: Vec3, to: Vec3, color: impl Into<Color>, ) -> Arc3dBuilder<'_, Config, Clear>

Draws the shortest arc between two points (from and to) relative to a specified center point.

Arguments

• center: The center point around which the arc is drawn.
• from: The starting point of the arc.
• to: The ending point of the arc.
• color: color of the arc

Builder methods

The resolution of the arc (i.e. the level of detail) can be adjusted with the .resolution(...) method.

Examples

fn system(mut gizmos: Gizmos) {
    gizmos.short_arc_3d_between(
       Vec3::ONE,
       Vec3::ONE + Vec3::NEG_ONE,
       Vec3::ZERO,
       ORANGE
       )
       .resolution(100);
}

Notes

• This method assumes that the points from and to are distinct from center. If one of the points is coincident with center, nothing is rendered.
• The arc is drawn as a portion of a circle with a radius equal to the distance from the center to from. If the distance from center to to is not equal to the radius, then the results will behave as if this were the case

pub fn long_arc_3d_between( &mut self, center: Vec3, from: Vec3, to: Vec3, color: impl Into<Color>, ) -> Arc3dBuilder<'_, Config, Clear>

Draws the longest arc between two points (from and to) relative to a specified center point.

Arguments

• center: The center point around which the arc is drawn.
• from: The starting point of the arc.
• to: The ending point of the arc.
• color: color of the arc

Builder methods

The resolution of the arc (i.e. the level of detail) can be adjusted with the .resolution(...) method.

Examples

fn system(mut gizmos: Gizmos) {
    gizmos.long_arc_3d_between(
       Vec3::ONE,
       Vec3::ONE + Vec3::NEG_ONE,
       Vec3::ZERO,
       ORANGE
       )
       .resolution(100);
}

Notes

• This method assumes that the points from and to are distinct from center. If one of the points is coincident with center, nothing is rendered.
• The arc is drawn as a portion of a circle with a radius equal to the distance from the center to from. If the distance from center to to is not equal to the radius, then the results will behave as if this were the case.

pub fn short_arc_2d_between( &mut self, center: Vec2, from: Vec2, to: Vec2, color: impl Into<Color>, ) -> Arc2dBuilder<'_, Config, Clear>

Draws the shortest arc between two points (from and to) relative to a specified center point.

Arguments

• center: The center point around which the arc is drawn.
• from: The starting point of the arc.
• to: The ending point of the arc.
• color: color of the arc

Builder methods

The resolution of the arc (i.e. the level of detail) can be adjusted with the .resolution(...) method.

Examples

fn system(mut gizmos: Gizmos) {
    gizmos.short_arc_2d_between(
       Vec2::ZERO,
       Vec2::X,
       Vec2::Y,
       ORANGE
       )
       .resolution(100);
}

Notes

• This method assumes that the points from and to are distinct from center. If one of the points is coincident with center, nothing is rendered.
• The arc is drawn as a portion of a circle with a radius equal to the distance from the center to from. If the distance from center to to is not equal to the radius, then the results will behave as if this were the case

Examples found in repository

examples/gizmos/2d_gizmos.rs (line 106)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn long_arc_2d_between( &mut self, center: Vec2, from: Vec2, to: Vec2, color: impl Into<Color>, ) -> Arc2dBuilder<'_, Config, Clear>

Draws the longest arc between two points (from and to) relative to a specified center point.

Arguments

• center: The center point around which the arc is drawn.
• from: The starting point of the arc.
• to: The ending point of the arc.
• color: color of the arc

Builder methods

The resolution of the arc (i.e. the level of detail) can be adjusted with the .resolution(...) method.

Examples

fn system(mut gizmos: Gizmos) {
    gizmos.long_arc_2d_between(
       Vec2::ZERO,
       Vec2::X,
       Vec2::Y,
       ORANGE
       )
       .resolution(100);
}

Notes

• This method assumes that the points from and to are distinct from center. If one of the points is coincident with center, nothing is rendered.
• The arc is drawn as a portion of a circle with a radius equal to the distance from the center to from. If the distance from center to to is not equal to the radius, then the results will behave as if this were the case.

Examples found in repository

examples/gizmos/2d_gizmos.rs (line 105)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn arrow( &mut self, start: Vec3, end: Vec3, color: impl Into<Color>, ) -> ArrowBuilder<'_, Config, Clear>

Draw an arrow in 3D, from start to end. Has four tips for convenient viewing from any direction.

This should be called for each frame the arrow needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.arrow(Vec3::ZERO, Vec3::ONE, GREEN);
}

Examples found in repository

examples/transforms/align.rs (line 125)

fn draw_ship_axes(mut gizmos: Gizmos, ship_transform: Single<&Transform, With<Ship>>) {
    // Local Z-axis arrow, negative direction
    let z_ends = arrow_ends(*ship_transform, Vec3::NEG_Z, 1.5);
    gizmos.arrow(z_ends.0, z_ends.1, RED);

    // local X-axis arrow
    let x_ends = arrow_ends(*ship_transform, Vec3::X, 1.5);
    gizmos.arrow(x_ends.0, x_ends.1, Color::srgb(0.65, 0., 0.));
}

// Draw the randomly generated axes
fn draw_random_axes(mut gizmos: Gizmos, random_axes: Single<&RandomAxes>) {
    let RandomAxes(v1, v2) = *random_axes;
    gizmos.arrow(Vec3::ZERO, 1.5 * *v1, WHITE);
    gizmos.arrow(Vec3::ZERO, 1.5 * *v2, GRAY);
}

examples/picking/mesh_picking.rs (line 181)

fn draw_mesh_intersections(pointers: Query<&PointerInteraction>, mut gizmos: Gizmos) {
    for (point, normal) in pointers
        .iter()
        .filter_map(|interaction| interaction.get_nearest_hit())
        .filter_map(|(_entity, hit)| hit.position.zip(hit.normal))
    {
        gizmos.sphere(point, 0.05, RED_500);
        gizmos.arrow(point, point + normal.normalize() * 0.5, PINK_100);
    }
}

examples/gizmos/3d_gizmos.rs (line 197)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

pub fn arrow_2d( &mut self, start: Vec2, end: Vec2, color: impl Into<Color>, ) -> ArrowBuilder<'_, Config, Clear>

Draw an arrow in 2D (on the xy plane), from start to end.

This should be called for each frame the arrow needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.arrow_2d(Vec2::ZERO, Vec2::X, GREEN);
}

Examples found in repository

examples/math/cubic_splines.rs (line 194)

fn draw_control_points(
    control_points: Res<ControlPoints>,
    spline_mode: Res<SplineMode>,
    mut gizmos: Gizmos,
) {
    for &(point, tangent) in &control_points.points_and_tangents {
        gizmos.circle_2d(point, 10.0, Color::srgb(0.0, 1.0, 0.0));

        if matches!(*spline_mode, SplineMode::Hermite) {
            gizmos.arrow_2d(point, point + tangent, Color::srgb(1.0, 0.0, 0.0));
        }
    }
}

/// Helper function for generating a [`Curve`] from [control points] and selected modes.
///
/// [control points]: ControlPoints
fn form_curve(
    control_points: &ControlPoints,
    spline_mode: SplineMode,
    cycling_mode: CyclingMode,
) -> Curve {
    let (points, tangents): (Vec<_>, Vec<_>) =
        control_points.points_and_tangents.iter().copied().unzip();

    match spline_mode {
        SplineMode::Hermite => {
            let spline = CubicHermite::new(points, tangents);
            Curve(match cycling_mode {
                CyclingMode::NotCyclic => spline.to_curve().ok(),
                CyclingMode::Cyclic => spline.to_curve_cyclic().ok(),
            })
        }
        SplineMode::Cardinal => {
            let spline = CubicCardinalSpline::new_catmull_rom(points);
            Curve(match cycling_mode {
                CyclingMode::NotCyclic => spline.to_curve().ok(),
                CyclingMode::Cyclic => spline.to_curve_cyclic().ok(),
            })
        }
        SplineMode::B => {
            let spline = CubicBSpline::new(points);
            Curve(match cycling_mode {
                CyclingMode::NotCyclic => spline.to_curve().ok(),
                CyclingMode::Cyclic => spline.to_curve_cyclic().ok(),
            })
        }
    }
}

// --------------------
// Text-related Components and Systems
// --------------------

/// Marker component for the text node that displays the current [`SplineMode`].
#[derive(Component)]
struct SplineModeText;

/// Marker component for the text node that displays the current [`CyclingMode`].
#[derive(Component)]
struct CyclingModeText;

fn update_spline_mode_text(
    spline_mode: Res<SplineMode>,
    mut spline_mode_text: Query<&mut Text, With<SplineModeText>>,
) {
    if !spline_mode.is_changed() {
        return;
    }

    let new_text = format!("Spline: {}", *spline_mode);

    for mut spline_mode_text in spline_mode_text.iter_mut() {
        (**spline_mode_text).clone_from(&new_text);
    }
}

fn update_cycling_mode_text(
    cycling_mode: Res<CyclingMode>,
    mut cycling_mode_text: Query<&mut Text, With<CyclingModeText>>,
) {
    if !cycling_mode.is_changed() {
        return;
    }

    let new_text = format!("{}", *cycling_mode);

    for mut cycling_mode_text in cycling_mode_text.iter_mut() {
        (**cycling_mode_text).clone_from(&new_text);
    }
}

// -----------------------------------
// Input-related Resources and Systems
// -----------------------------------

/// A small state machine which tracks a click-and-drag motion used to create new control points.
///
/// When the user is not doing a click-and-drag motion, the `start` field is `None`. When the user
/// presses the left mouse button, the location of that press is temporarily stored in the field.
#[derive(Clone, Default, Resource)]
struct MouseEditMove {
    start: Option<Vec2>,
}

/// The current mouse position, if known.
#[derive(Clone, Default, Resource)]
struct MousePosition(Option<Vec2>);

/// Update the current cursor position and track it in the [`MousePosition`] resource.
fn handle_mouse_move(
    mut cursor_events: EventReader<CursorMoved>,
    mut mouse_position: ResMut<MousePosition>,
) {
    if let Some(cursor_event) = cursor_events.read().last() {
        mouse_position.0 = Some(cursor_event.position);
    }
}

/// This system handles updating the [`MouseEditMove`] resource, orchestrating the logical part
/// of the click-and-drag motion which actually creates new control points.
fn handle_mouse_press(
    mut button_events: EventReader<MouseButtonInput>,
    mouse_position: Res<MousePosition>,
    mut edit_move: ResMut<MouseEditMove>,
    mut control_points: ResMut<ControlPoints>,
    camera: Single<(&Camera, &GlobalTransform)>,
) {
    let Some(mouse_pos) = mouse_position.0 else {
        return;
    };

    // Handle click and drag behavior
    for button_event in button_events.read() {
        if button_event.button != MouseButton::Left {
            continue;
        }

        match button_event.state {
            ButtonState::Pressed => {
                if edit_move.start.is_some() {
                    // If the edit move already has a start, press event should do nothing.
                    continue;
                }
                // This press represents the start of the edit move.
                edit_move.start = Some(mouse_pos);
            }

            ButtonState::Released => {
                // Release is only meaningful if we started an edit move.
                let Some(start) = edit_move.start else {
                    continue;
                };

                let (camera, camera_transform) = *camera;

                // Convert the starting point and end point (current mouse pos) into world coords:
                let Ok(point) = camera.viewport_to_world_2d(camera_transform, start) else {
                    continue;
                };
                let Ok(end_point) = camera.viewport_to_world_2d(camera_transform, mouse_pos) else {
                    continue;
                };
                let tangent = end_point - point;

                // The start of the click-and-drag motion represents the point to add,
                // while the difference with the current position represents the tangent.
                control_points.points_and_tangents.push((point, tangent));

                // Reset the edit move since we've consumed it.
                edit_move.start = None;
            }
        }
    }
}

/// This system handles drawing the "preview" control point based on the state of [`MouseEditMove`].
fn draw_edit_move(
    edit_move: Res<MouseEditMove>,
    mouse_position: Res<MousePosition>,
    mut gizmos: Gizmos,
    camera: Single<(&Camera, &GlobalTransform)>,
) {
    let Some(start) = edit_move.start else {
        return;
    };
    let Some(mouse_pos) = mouse_position.0 else {
        return;
    };

    let (camera, camera_transform) = *camera;

    // Resources store data in viewport coordinates, so we need to convert to world coordinates
    // to display them:
    let Ok(start) = camera.viewport_to_world_2d(camera_transform, start) else {
        return;
    };
    let Ok(end) = camera.viewport_to_world_2d(camera_transform, mouse_pos) else {
        return;
    };

    gizmos.circle_2d(start, 10.0, Color::srgb(0.0, 1.0, 0.7));
    gizmos.circle_2d(start, 7.0, Color::srgb(0.0, 1.0, 0.7));
    gizmos.arrow_2d(start, end, Color::srgb(1.0, 0.0, 0.7));
}

examples/gizmos/2d_gizmos.rs (lines 108-112)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn axes(&mut self, transform: impl TransformPoint, base_length: f32)

Draw a set of axes local to the given transform (transform), with length scaled by a factor of base_length.

This should be called for each frame the axes need to be rendered.

Example

fn draw_axes(
    mut gizmos: Gizmos,
    query: Query<&Transform, With<MyComponent>>,
) {
    for &transform in &query {
        gizmos.axes(transform, 1.);
    }
}

Examples found in repository

examples/gizmos/axes.rs (line 102)

fn draw_axes(mut gizmos: Gizmos, query: Query<(&Transform, &Aabb), With<ShowAxes>>) {
    for (&transform, &aabb) in &query {
        let length = aabb.half_extents.length();
        gizmos.axes(transform, length);
    }
}

examples/animation/custom_skinned_mesh.rs (line 233)

fn joint_animation(
    time: Res<Time>,
    mut query: Query<(&mut Transform, &AnimatedJoint)>,
    mut gizmos: Gizmos,
) {
    for (mut transform, animated_joint) in &mut query {
        match animated_joint.0 {
            -5 => {
                transform.rotation =
                    Quat::from_rotation_x(FRAC_PI_2 * ops::sin(time.elapsed_secs()));
            }
            -4 => {
                transform.rotation =
                    Quat::from_rotation_y(FRAC_PI_2 * ops::sin(time.elapsed_secs()));
            }
            -3 => {
                transform.rotation =
                    Quat::from_rotation_z(FRAC_PI_2 * ops::sin(time.elapsed_secs()));
            }
            -2 => {
                transform.scale.x = ops::sin(time.elapsed_secs()) + 1.0;
            }
            -1 => {
                transform.scale.y = ops::sin(time.elapsed_secs()) + 1.0;
            }
            0 => {
                transform.translation.x = 0.5 * ops::sin(time.elapsed_secs());
                transform.translation.y = ops::cos(time.elapsed_secs());
            }
            1 => {
                transform.translation.y = ops::sin(time.elapsed_secs());
                transform.translation.z = ops::cos(time.elapsed_secs());
            }
            2 => {
                transform.translation.x = ops::sin(time.elapsed_secs());
            }
            3 => {
                transform.translation.y = ops::sin(time.elapsed_secs());
                transform.scale.x = ops::sin(time.elapsed_secs()) + 1.0;
            }
            _ => (),
        }
        // Show transform
        let mut axis = *transform;
        axis.translation.x += animated_joint.0 as f32 * 1.5;
        gizmos.axes(axis, 1.0);
    }
}

pub fn axes_2d(&mut self, transform: impl TransformPoint, base_length: f32)

Draw a set of axes local to the given transform (transform), with length scaled by a factor of base_length.

This should be called for each frame the axes need to be rendered.

Example

fn draw_axes_2d(
    mut gizmos: Gizmos,
    query: Query<&Transform, With<AxesComponent>>,
) {
    for &transform in &query {
        gizmos.axes_2d(transform, 1.);
    }
}

pub fn ellipse( &mut self, isometry: impl Into<Isometry3d>, half_size: Vec2, color: impl Into<Color>, ) -> EllipseBuilder<'_, Config, Clear>

Draw an ellipse in 3D with the given isometry applied.

If isometry == Isometry3d::IDENTITY then

• the center is at Vec3::ZERO
• the half_sizes are aligned with the Vec3::X and Vec3::Y axes.

This should be called for each frame the ellipse needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.ellipse(Isometry3d::IDENTITY, Vec2::new(1., 2.), GREEN);

    // Ellipses have 32 line-segments by default.
    // You may want to increase this for larger ellipses.
    gizmos
        .ellipse(Isometry3d::IDENTITY, Vec2::new(5., 1.), RED)
        .resolution(64);
}

pub fn ellipse_2d( &mut self, isometry: impl Into<Isometry2d>, half_size: Vec2, color: impl Into<Color>, ) -> Ellipse2dBuilder<'_, Config, Clear>

Draw an ellipse in 2D with the given isometry applied.

If isometry == Isometry2d::IDENTITY then

• the center is at Vec2::ZERO
• the half_sizes are aligned with the Vec2::X and Vec2::Y axes.

This should be called for each frame the ellipse needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.ellipse_2d(Isometry2d::from_rotation(Rot2::degrees(180.0)), Vec2::new(2., 1.), GREEN);

    // Ellipses have 32 line-segments by default.
    // You may want to increase this for larger ellipses.
    gizmos
        .ellipse_2d(Isometry2d::from_rotation(Rot2::degrees(180.0)), Vec2::new(5., 1.), RED)
        .resolution(64);
}

Examples found in repository

examples/gizmos/2d_gizmos.rs (lines 90-94)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn circle( &mut self, isometry: impl Into<Isometry3d>, radius: f32, color: impl Into<Color>, ) -> EllipseBuilder<'_, Config, Clear>

Draw a circle in 3D with the given isometry applied.

If isometry == Isometry3d::IDENTITY then

• the center is at Vec3::ZERO
• the radius is aligned with the Vec3::X and Vec3::Y axes.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.circle(Isometry3d::IDENTITY, 1., GREEN);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    gizmos
        .circle(Isometry3d::IDENTITY, 5., RED)
        .resolution(64);
}

Examples found in repository

examples/3d/3d_viewport_to_world.rs (lines 43-50)

fn draw_cursor(
    camera_query: Single<(&Camera, &GlobalTransform)>,
    ground: Single<&GlobalTransform, With<Ground>>,
    windows: Query<&Window>,
    mut gizmos: Gizmos,
) {
    let Ok(windows) = windows.single() else {
        return;
    };

    let (camera, camera_transform) = *camera_query;

    let Some(cursor_position) = windows.cursor_position() else {
        return;
    };

    // Calculate a ray pointing from the camera into the world based on the cursor's position.
    let Ok(ray) = camera.viewport_to_world(camera_transform, cursor_position) else {
        return;
    };

    // Calculate if and where the ray is hitting the ground plane.
    let Some(distance) =
        ray.intersect_plane(ground.translation(), InfinitePlane3d::new(ground.up()))
    else {
        return;
    };
    let point = ray.get_point(distance);

    // Draw a circle just above the ground plane at that position.
    gizmos.circle(
        Isometry3d::new(
            point + ground.up() * 0.01,
            Quat::from_rotation_arc(Vec3::Z, ground.up().as_vec3()),
        ),
        0.2,
        Color::WHITE,
    );
}

examples/gizmos/3d_gizmos.rs (line 187)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

pub fn circle_2d( &mut self, isometry: impl Into<Isometry2d>, radius: f32, color: impl Into<Color>, ) -> Ellipse2dBuilder<'_, Config, Clear>

Draw a circle in 2D with the given isometry applied.

If isometry == Isometry2d::IDENTITY then

• the center is at Vec2::ZERO
• the radius is aligned with the Vec2::X and Vec2::Y axes.

This should be called for each frame the circle needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.circle_2d(Isometry2d::IDENTITY, 1., GREEN);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    gizmos
        .circle_2d(Isometry2d::IDENTITY, 5., RED)
        .resolution(64);
}

Examples found in repository

examples/testbed/2d.rs (line 283)

    pub fn draw_gizmos(mut gizmos: Gizmos) {
        gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::new(200.0, 200.0), RED);
        gizmos
            .circle_2d(Isometry2d::IDENTITY, 200.0, GREEN)
            .resolution(64);
    }

examples/ecs/observers.rs (lines 163-167)

fn draw_shapes(mut gizmos: Gizmos, mines: Query<&Mine>) {
    for mine in &mines {
        gizmos.circle_2d(
            mine.pos,
            mine.size,
            Color::hsl((mine.size - 4.0) / 16.0 * 360.0, 1.0, 0.8),
        );
    }
}

examples/math/cubic_splines.rs (line 191)

fn draw_control_points(
    control_points: Res<ControlPoints>,
    spline_mode: Res<SplineMode>,
    mut gizmos: Gizmos,
) {
    for &(point, tangent) in &control_points.points_and_tangents {
        gizmos.circle_2d(point, 10.0, Color::srgb(0.0, 1.0, 0.0));

        if matches!(*spline_mode, SplineMode::Hermite) {
            gizmos.arrow_2d(point, point + tangent, Color::srgb(1.0, 0.0, 0.0));
        }
    }
}

/// Helper function for generating a [`Curve`] from [control points] and selected modes.
///
/// [control points]: ControlPoints
fn form_curve(
    control_points: &ControlPoints,
    spline_mode: SplineMode,
    cycling_mode: CyclingMode,
) -> Curve {
    let (points, tangents): (Vec<_>, Vec<_>) =
        control_points.points_and_tangents.iter().copied().unzip();

    match spline_mode {
        SplineMode::Hermite => {
            let spline = CubicHermite::new(points, tangents);
            Curve(match cycling_mode {
                CyclingMode::NotCyclic => spline.to_curve().ok(),
                CyclingMode::Cyclic => spline.to_curve_cyclic().ok(),
            })
        }
        SplineMode::Cardinal => {
            let spline = CubicCardinalSpline::new_catmull_rom(points);
            Curve(match cycling_mode {
                CyclingMode::NotCyclic => spline.to_curve().ok(),
                CyclingMode::Cyclic => spline.to_curve_cyclic().ok(),
            })
        }
        SplineMode::B => {
            let spline = CubicBSpline::new(points);
            Curve(match cycling_mode {
                CyclingMode::NotCyclic => spline.to_curve().ok(),
                CyclingMode::Cyclic => spline.to_curve_cyclic().ok(),
            })
        }
    }
}

// --------------------
// Text-related Components and Systems
// --------------------

/// Marker component for the text node that displays the current [`SplineMode`].
#[derive(Component)]
struct SplineModeText;

/// Marker component for the text node that displays the current [`CyclingMode`].
#[derive(Component)]
struct CyclingModeText;

fn update_spline_mode_text(
    spline_mode: Res<SplineMode>,
    mut spline_mode_text: Query<&mut Text, With<SplineModeText>>,
) {
    if !spline_mode.is_changed() {
        return;
    }

    let new_text = format!("Spline: {}", *spline_mode);

    for mut spline_mode_text in spline_mode_text.iter_mut() {
        (**spline_mode_text).clone_from(&new_text);
    }
}

fn update_cycling_mode_text(
    cycling_mode: Res<CyclingMode>,
    mut cycling_mode_text: Query<&mut Text, With<CyclingModeText>>,
) {
    if !cycling_mode.is_changed() {
        return;
    }

    let new_text = format!("{}", *cycling_mode);

    for mut cycling_mode_text in cycling_mode_text.iter_mut() {
        (**cycling_mode_text).clone_from(&new_text);
    }
}

// -----------------------------------
// Input-related Resources and Systems
// -----------------------------------

/// A small state machine which tracks a click-and-drag motion used to create new control points.
///
/// When the user is not doing a click-and-drag motion, the `start` field is `None`. When the user
/// presses the left mouse button, the location of that press is temporarily stored in the field.
#[derive(Clone, Default, Resource)]
struct MouseEditMove {
    start: Option<Vec2>,
}

/// The current mouse position, if known.
#[derive(Clone, Default, Resource)]
struct MousePosition(Option<Vec2>);

/// Update the current cursor position and track it in the [`MousePosition`] resource.
fn handle_mouse_move(
    mut cursor_events: EventReader<CursorMoved>,
    mut mouse_position: ResMut<MousePosition>,
) {
    if let Some(cursor_event) = cursor_events.read().last() {
        mouse_position.0 = Some(cursor_event.position);
    }
}

/// This system handles updating the [`MouseEditMove`] resource, orchestrating the logical part
/// of the click-and-drag motion which actually creates new control points.
fn handle_mouse_press(
    mut button_events: EventReader<MouseButtonInput>,
    mouse_position: Res<MousePosition>,
    mut edit_move: ResMut<MouseEditMove>,
    mut control_points: ResMut<ControlPoints>,
    camera: Single<(&Camera, &GlobalTransform)>,
) {
    let Some(mouse_pos) = mouse_position.0 else {
        return;
    };

    // Handle click and drag behavior
    for button_event in button_events.read() {
        if button_event.button != MouseButton::Left {
            continue;
        }

        match button_event.state {
            ButtonState::Pressed => {
                if edit_move.start.is_some() {
                    // If the edit move already has a start, press event should do nothing.
                    continue;
                }
                // This press represents the start of the edit move.
                edit_move.start = Some(mouse_pos);
            }

            ButtonState::Released => {
                // Release is only meaningful if we started an edit move.
                let Some(start) = edit_move.start else {
                    continue;
                };

                let (camera, camera_transform) = *camera;

                // Convert the starting point and end point (current mouse pos) into world coords:
                let Ok(point) = camera.viewport_to_world_2d(camera_transform, start) else {
                    continue;
                };
                let Ok(end_point) = camera.viewport_to_world_2d(camera_transform, mouse_pos) else {
                    continue;
                };
                let tangent = end_point - point;

                // The start of the click-and-drag motion represents the point to add,
                // while the difference with the current position represents the tangent.
                control_points.points_and_tangents.push((point, tangent));

                // Reset the edit move since we've consumed it.
                edit_move.start = None;
            }
        }
    }
}

/// This system handles drawing the "preview" control point based on the state of [`MouseEditMove`].
fn draw_edit_move(
    edit_move: Res<MouseEditMove>,
    mouse_position: Res<MousePosition>,
    mut gizmos: Gizmos,
    camera: Single<(&Camera, &GlobalTransform)>,
) {
    let Some(start) = edit_move.start else {
        return;
    };
    let Some(mouse_pos) = mouse_position.0 else {
        return;
    };

    let (camera, camera_transform) = *camera;

    // Resources store data in viewport coordinates, so we need to convert to world coordinates
    // to display them:
    let Ok(start) = camera.viewport_to_world_2d(camera_transform, start) else {
        return;
    };
    let Ok(end) = camera.viewport_to_world_2d(camera_transform, mouse_pos) else {
        return;
    };

    gizmos.circle_2d(start, 10.0, Color::srgb(0.0, 1.0, 0.7));
    gizmos.circle_2d(start, 7.0, Color::srgb(0.0, 1.0, 0.7));
    gizmos.arrow_2d(start, end, Color::srgb(1.0, 0.0, 0.7));
}

examples/math/bounding_2d.rs (line 190)

fn render_volumes(mut gizmos: Gizmos, query: Query<(&CurrentVolume, &Intersects)>) {
    for (volume, intersects) in query.iter() {
        let color = if **intersects { AQUA } else { ORANGE_RED };
        match volume {
            CurrentVolume::Aabb(a) => {
                gizmos.rect_2d(a.center(), a.half_size() * 2., color);
            }
            CurrentVolume::Circle(c) => {
                gizmos.circle_2d(c.center(), c.radius(), color);
            }
        }
    }
}

#[derive(Component, Deref, DerefMut, Default)]
struct Intersects(bool);

const OFFSET_X: f32 = 125.;
const OFFSET_Y: f32 = 75.;

fn setup(mut commands: Commands) {
    commands.spawn(Camera2d);

    commands.spawn((
        Transform::from_xyz(-OFFSET_X, OFFSET_Y, 0.),
        Shape::Circle(Circle::new(45.)),
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        Transform::from_xyz(0., OFFSET_Y, 0.),
        Shape::Rectangle(Rectangle::new(80., 80.)),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn((
        Transform::from_xyz(OFFSET_X, OFFSET_Y, 0.),
        Shape::Triangle(Triangle2d::new(
            Vec2::new(-40., -40.),
            Vec2::new(-20., 40.),
            Vec2::new(40., 50.),
        )),
        Spin,
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        Transform::from_xyz(-OFFSET_X, -OFFSET_Y, 0.),
        Shape::Line(Segment2d::from_direction_and_length(
            Dir2::from_xy(1., 0.3).unwrap(),
            90.,
        )),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn((
        Transform::from_xyz(0., -OFFSET_Y, 0.),
        Shape::Capsule(Capsule2d::new(25., 50.)),
        Spin,
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        Transform::from_xyz(OFFSET_X, -OFFSET_Y, 0.),
        Shape::Polygon(RegularPolygon::new(50., 6)),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn((
        Text::default(),
        Node {
            position_type: PositionType::Absolute,
            top: Val::Px(12.0),
            left: Val::Px(12.0),
            ..default()
        },
    ));
}

fn draw_filled_circle(gizmos: &mut Gizmos, position: Vec2, color: Srgba) {
    for r in [1., 2., 3.] {
        gizmos.circle_2d(position, r, color);
    }
}

fn draw_ray(gizmos: &mut Gizmos, ray: &RayCast2d) {
    gizmos.line_2d(
        ray.ray.origin,
        ray.ray.origin + *ray.ray.direction * ray.max,
        WHITE,
    );
    draw_filled_circle(gizmos, ray.ray.origin, FUCHSIA);
}

fn get_and_draw_ray(gizmos: &mut Gizmos, time: &Time) -> RayCast2d {
    let ray = Vec2::new(ops::cos(time.elapsed_secs()), ops::sin(time.elapsed_secs()));
    let dist = 150. + ops::sin(0.5 * time.elapsed_secs()).abs() * 500.;

    let aabb_ray = Ray2d {
        origin: ray * 250.,
        direction: Dir2::new_unchecked(-ray),
    };
    let ray_cast = RayCast2d::from_ray(aabb_ray, dist - 20.);

    draw_ray(gizmos, &ray_cast);
    ray_cast
}

fn ray_cast_system(
    mut gizmos: Gizmos,
    time: Res<Time>,
    mut volumes: Query<(&CurrentVolume, &mut Intersects)>,
) {
    let ray_cast = get_and_draw_ray(&mut gizmos, &time);

    for (volume, mut intersects) in volumes.iter_mut() {
        let toi = match volume {
            CurrentVolume::Aabb(a) => ray_cast.aabb_intersection_at(a),
            CurrentVolume::Circle(c) => ray_cast.circle_intersection_at(c),
        };
        **intersects = toi.is_some();
        if let Some(toi) = toi {
            draw_filled_circle(
                &mut gizmos,
                ray_cast.ray.origin + *ray_cast.ray.direction * toi,
                LIME,
            );
        }
    }
}

fn aabb_cast_system(
    mut gizmos: Gizmos,
    time: Res<Time>,
    mut volumes: Query<(&CurrentVolume, &mut Intersects)>,
) {
    let ray_cast = get_and_draw_ray(&mut gizmos, &time);
    let aabb_cast = AabbCast2d {
        aabb: Aabb2d::new(Vec2::ZERO, Vec2::splat(15.)),
        ray: ray_cast,
    };

    for (volume, mut intersects) in volumes.iter_mut() {
        let toi = match *volume {
            CurrentVolume::Aabb(a) => aabb_cast.aabb_collision_at(a),
            CurrentVolume::Circle(_) => None,
        };

        **intersects = toi.is_some();
        if let Some(toi) = toi {
            gizmos.rect_2d(
                aabb_cast.ray.ray.origin + *aabb_cast.ray.ray.direction * toi,
                aabb_cast.aabb.half_size() * 2.,
                LIME,
            );
        }
    }
}

fn bounding_circle_cast_system(
    mut gizmos: Gizmos,
    time: Res<Time>,
    mut volumes: Query<(&CurrentVolume, &mut Intersects)>,
) {
    let ray_cast = get_and_draw_ray(&mut gizmos, &time);
    let circle_cast = BoundingCircleCast {
        circle: BoundingCircle::new(Vec2::ZERO, 15.),
        ray: ray_cast,
    };

    for (volume, mut intersects) in volumes.iter_mut() {
        let toi = match *volume {
            CurrentVolume::Aabb(_) => None,
            CurrentVolume::Circle(c) => circle_cast.circle_collision_at(c),
        };

        **intersects = toi.is_some();
        if let Some(toi) = toi {
            gizmos.circle_2d(
                circle_cast.ray.ray.origin + *circle_cast.ray.ray.direction * toi,
                circle_cast.circle.radius(),
                LIME,
            );
        }
    }
}

fn get_intersection_position(time: &Time) -> Vec2 {
    let x = ops::cos(0.8 * time.elapsed_secs()) * 250.;
    let y = ops::sin(0.4 * time.elapsed_secs()) * 100.;
    Vec2::new(x, y)
}

fn aabb_intersection_system(
    mut gizmos: Gizmos,
    time: Res<Time>,
    mut volumes: Query<(&CurrentVolume, &mut Intersects)>,
) {
    let center = get_intersection_position(&time);
    let aabb = Aabb2d::new(center, Vec2::splat(50.));
    gizmos.rect_2d(center, aabb.half_size() * 2., YELLOW);

    for (volume, mut intersects) in volumes.iter_mut() {
        let hit = match volume {
            CurrentVolume::Aabb(a) => aabb.intersects(a),
            CurrentVolume::Circle(c) => aabb.intersects(c),
        };

        **intersects = hit;
    }
}

fn circle_intersection_system(
    mut gizmos: Gizmos,
    time: Res<Time>,
    mut volumes: Query<(&CurrentVolume, &mut Intersects)>,
) {
    let center = get_intersection_position(&time);
    let circle = BoundingCircle::new(center, 50.);
    gizmos.circle_2d(center, circle.radius(), YELLOW);

    for (volume, mut intersects) in volumes.iter_mut() {
        let hit = match volume {
            CurrentVolume::Aabb(a) => circle.intersects(a),
            CurrentVolume::Circle(c) => circle.intersects(c),
        };

        **intersects = hit;
    }
}

examples/2d/mesh2d_arcs.rs (line 118)

fn draw_bounds<Shape: Bounded2d + Send + Sync + 'static>(
    q: Query<(&DrawBounds<Shape>, &GlobalTransform)>,
    mut gizmos: Gizmos,
) {
    for (shape, transform) in &q {
        let (_, rotation, translation) = transform.to_scale_rotation_translation();
        let translation = translation.truncate();
        let rotation = rotation.to_euler(EulerRot::XYZ).2;
        let isometry = Isometry2d::new(translation, Rot2::radians(rotation));

        let aabb = shape.0.aabb_2d(isometry);
        gizmos.rect_2d(aabb.center(), aabb.half_size() * 2.0, RED);

        let bounding_circle = shape.0.bounding_circle(isometry);
        gizmos.circle_2d(bounding_circle.center, bounding_circle.radius(), BLUE);
    }
}

examples/2d/2d_viewport_to_world.rs (line 53)

fn draw_cursor(
    camera_query: Single<(&Camera, &GlobalTransform)>,
    window: Query<&Window>,
    mut gizmos: Gizmos,
) {
    let (camera, camera_transform) = *camera_query;
    let Ok(window) = window.single() else {
        return;
    };

    let Some(cursor_position) = window.cursor_position() else {
        return;
    };

    // Calculate a world position based on the cursor's position.
    let Ok(world_pos) = camera.viewport_to_world_2d(camera_transform, cursor_position) else {
        return;
    };

    // To test Camera::world_to_viewport, convert result back to viewport space and then back to world space.
    let Ok(viewport_check) = camera.world_to_viewport(camera_transform, world_pos.extend(0.0))
    else {
        return;
    };
    let Ok(world_check) = camera.viewport_to_world_2d(camera_transform, viewport_check.xy()) else {
        return;
    };

    gizmos.circle_2d(world_pos, 10., WHITE);
    // Should be the same as world_pos
    gizmos.circle_2d(world_check, 8., RED);
}

Additional examples can be found in:

• examples/math/custom_primitives.rs
• examples/gizmos/2d_gizmos.rs

pub fn sphere( &mut self, isometry: impl Into<Isometry3d>, radius: f32, color: impl Into<Color>, ) -> SphereBuilder<'_, Config, Clear>

Draw a wireframe sphere in 3D made out of 3 circles around the axes with the given isometry applied.

If isometry == Isometry3d::IDENTITY then

• the center is at Vec3::ZERO
• the 3 circles are in the XY, YZ and XZ planes.

This should be called for each frame the sphere needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.sphere(Isometry3d::IDENTITY, 1., Color::BLACK);

    // Each circle has 32 line-segments by default.
    // You may want to increase this for larger spheres.
    gizmos
        .sphere(Isometry3d::IDENTITY, 5., Color::BLACK)
        .resolution(64);
}

Examples found in repository

examples/testbed/3d.rs (line 323)

    pub fn draw_gizmos(mut gizmos: Gizmos) {
        gizmos.cuboid(
            Transform::from_translation(Vec3::X * 2.0).with_scale(Vec3::splat(2.0)),
            RED,
        );
        gizmos
            .sphere(Isometry3d::from_translation(Vec3::X * -2.0), 1.0, GREEN)
            .resolution(30_000 / 3);
    }

examples/picking/mesh_picking.rs (line 180)

fn draw_mesh_intersections(pointers: Query<&PointerInteraction>, mut gizmos: Gizmos) {
    for (point, normal) in pointers
        .iter()
        .filter_map(|interaction| interaction.get_nearest_hit())
        .filter_map(|(_entity, hit)| hit.position.zip(hit.normal))
    {
        gizmos.sphere(point, 0.05, RED_500);
        gizmos.arrow(point, point + normal.normalize() * 0.5, PINK_100);
    }
}

examples/3d/mesh_ray_cast.rs (line 38)

fn bouncing_raycast(
    mut ray_cast: MeshRayCast,
    mut gizmos: Gizmos,
    time: Res<Time>,
    // The ray map stores rays cast by the cursor
    ray_map: Res<RayMap>,
) {
    // Cast an automatically moving ray and bounce it off of surfaces
    let t = ops::cos((time.elapsed_secs() - 4.0).max(0.0) * LASER_SPEED) * PI;
    let ray_pos = Vec3::new(ops::sin(t), ops::cos(3.0 * t) * 0.5, ops::cos(t)) * 0.5;
    let ray_dir = Dir3::new(-ray_pos).unwrap();
    let ray = Ray3d::new(ray_pos, ray_dir);
    gizmos.sphere(ray_pos, 0.1, Color::WHITE);
    bounce_ray(ray, &mut ray_cast, &mut gizmos, Color::from(css::RED));

    // Cast a ray from the cursor and bounce it off of surfaces
    for (_, ray) in ray_map.iter() {
        bounce_ray(*ray, &mut ray_cast, &mut gizmos, Color::from(css::GREEN));
    }
}

// Bounces a ray off of surfaces `MAX_BOUNCES` times.
fn bounce_ray(mut ray: Ray3d, ray_cast: &mut MeshRayCast, gizmos: &mut Gizmos, color: Color) {
    let mut intersections = Vec::with_capacity(MAX_BOUNCES + 1);
    intersections.push((ray.origin, Color::srgb(30.0, 0.0, 0.0)));

    for i in 0..MAX_BOUNCES {
        // Cast the ray and get the first hit
        let Some((_, hit)) = ray_cast
            .cast_ray(ray, &MeshRayCastSettings::default())
            .first()
        else {
            break;
        };

        // Draw the point of intersection and add it to the list
        let brightness = 1.0 + 10.0 * (1.0 - i as f32 / MAX_BOUNCES as f32);
        intersections.push((hit.point, Color::BLACK.mix(&color, brightness)));
        gizmos.sphere(hit.point, 0.005, Color::BLACK.mix(&color, brightness * 2.0));

        // Reflect the ray off of the surface
        ray.direction = Dir3::new(ray.direction.reflect(hit.normal)).unwrap();
        ray.origin = hit.point + ray.direction * 1e-6;
    }
    gizmos.linestrip_gradient(intersections);
}

examples/math/custom_primitives.rs (line 243)

fn bounding_shapes_3d(
    shapes: Query<&Transform, With<Shape3d>>,
    mut gizmos: Gizmos,
    bounding_shape: Res<State<BoundingShape>>,
) {
    for transform in shapes.iter() {
        match bounding_shape.get() {
            BoundingShape::None => (),
            BoundingShape::BoundingBox => {
                // Get the AABB of the extrusion with the rotation and translation of the mesh.
                let aabb = EXTRUSION.aabb_3d(transform.to_isometry());

                gizmos.primitive_3d(
                    &Cuboid::from_size(Vec3::from(aabb.half_size()) * 2.),
                    aabb.center(),
                    WHITE,
                );
            }
            BoundingShape::BoundingSphere => {
                // Get the bounding sphere of the extrusion with the rotation and translation of the mesh.
                let bounding_sphere = EXTRUSION.bounding_sphere(transform.to_isometry());

                gizmos.sphere(bounding_sphere.center(), bounding_sphere.radius(), WHITE);
            }
        }
    }
}

examples/gizmos/3d_gizmos.rs (line 37)

fn setup(
    mut commands: Commands,
    mut gizmo_assets: ResMut<Assets<GizmoAsset>>,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    let mut gizmo = GizmoAsset::new();

    // When drawing a lot of static lines a Gizmo component can have
    // far better performance than the Gizmos system parameter,
    // but the system parameter will perform better for smaller lines that update often.

    // A sphere made out of 30_000 lines!
    gizmo
        .sphere(Isometry3d::IDENTITY, 0.5, CRIMSON)
        .resolution(30_000 / 3);

    commands.spawn((
        Gizmo {
            handle: gizmo_assets.add(gizmo),
            line_config: GizmoLineConfig {
                width: 5.,
                ..default()
            },
            ..default()
        },
        Transform::from_xyz(4., 1., 0.),
    ));

    commands.spawn((
        Camera3d::default(),
        Transform::from_xyz(0., 1.5, 6.).looking_at(Vec3::ZERO, Vec3::Y),
        CameraController::default(),
    ));
    // plane
    commands.spawn((
        Mesh3d(meshes.add(Plane3d::default().mesh().size(5.0, 5.0))),
        MeshMaterial3d(materials.add(Color::srgb(0.3, 0.5, 0.3))),
    ));
    // cube
    commands.spawn((
        Mesh3d(meshes.add(Cuboid::new(1.0, 1.0, 1.0))),
        MeshMaterial3d(materials.add(Color::srgb(0.8, 0.7, 0.6))),
        Transform::from_xyz(0.0, 0.5, 0.0),
    ));
    // light
    commands.spawn((
        PointLight {
            shadows_enabled: true,
            ..default()
        },
        Transform::from_xyz(4.0, 8.0, 4.0),
    ));

    // example instructions
    commands.spawn((
        Text::new(
            "Press 'T' to toggle drawing gizmos on top of everything else in the scene\n\
            Press 'P' to toggle perspective for line gizmos\n\
            Hold 'Left' or 'Right' to change the line width of straight gizmos\n\
            Hold 'Up' or 'Down' to change the line width of round gizmos\n\
            Press '1' or '2' to toggle the visibility of straight gizmos or round gizmos\n\
            Press 'B' to show all AABB boxes\n\
            Press 'U' or 'I' to cycle through line styles for straight or round gizmos\n\
            Press 'J' or 'K' to cycle through line joins for straight or round gizmos",
        ),
        Node {
            position_type: PositionType::Absolute,
            top: Val::Px(12.0),
            left: Val::Px(12.0),
            ..default()
        },
    ));
}

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

pub fn cross( &mut self, isometry: impl Into<Isometry3d>, half_size: f32, color: impl Into<Color>, )

Draw a cross in 3D with the given isometry applied.

If isometry == Isometry3d::IDENTITY then

• the center is at Vec3::ZERO
• the half_sizes are aligned with the Vec3::X, Vec3::Y and Vec3::Z axes.

This should be called for each frame the cross needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.cross(Isometry3d::IDENTITY, 0.5, WHITE);
}

Examples found in repository

examples/gizmos/3d_gizmos.rs (line 146)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

pub fn cross_2d( &mut self, isometry: impl Into<Isometry2d>, half_size: f32, color: impl Into<Color>, )

Draw a cross in 2D with the given isometry applied.

If isometry == Isometry2d::IDENTITY then

• the center is at Vec3::ZERO
• the half_sizes are aligned with the Vec3::X and Vec3::Y axes.

This should be called for each frame the cross needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.cross_2d(Isometry2d::IDENTITY, 0.5, WHITE);
}

Examples found in repository

examples/gizmos/2d_gizmos.rs (line 69)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn curve_2d( &mut self, curve_2d: impl Curve<Vec2>, times: impl IntoIterator<Item = f32>, color: impl Into<Color>, )

Draw a curve, at the given time points, sampling in 2D.

This should be called for each frame the curve needs to be rendered.

Samples of time points outside of the curve’s domain will be filtered out and won’t contribute to the rendering. If you wish to render the curve outside of its domain you need to create a new curve with an extended domain.

Arguments

• curve_2d some type that implements the Curve trait and samples Vec2s
• times some iterable type yielding f32 which will be used for sampling the curve
• color the color of the curve

Example

fn system(mut gizmos: Gizmos) {
    let domain = Interval::UNIT;
    let curve = FunctionCurve::new(domain, |t| Vec2::from(t.sin_cos()));
    gizmos.curve_2d(curve, (0..=100).map(|n| n as f32 / 100.0), RED);
}

Examples found in repository

examples/animation/easing_functions.rs (lines 167-171)

fn display_curves(
    mut gizmos: Gizmos,
    ease_functions: Query<(&EaseFunctionPlot, &Transform, &Children)>,
    mut transforms: Query<&mut Transform, Without<EaseFunctionPlot>>,
    mut ui_text: Single<&mut Text>,
    time: Res<Time>,
) {
    let samples = 100;
    let duration = 2.5;
    let time_margin = 0.5;

    let now = ((time.elapsed_secs() % (duration + time_margin * 2.0) - time_margin) / duration)
        .clamp(0.0, 1.0);

    ui_text.0 = format!("Progress: {:.2}", now);

    for (EaseFunctionPlot(function, color), transform, children) in &ease_functions {
        let center = transform.translation.xy();
        let half_size = PLOT_SIZE / 2.0;

        // Draw a box around the curve
        gizmos.linestrip_2d(
            [
                center + half_size,
                center + half_size * Vec2::new(-1., 1.),
                center + half_size * Vec2::new(-1., -1.),
                center + half_size * Vec2::new(1., -1.),
                center + half_size,
            ],
            color.darker(0.4),
        );

        // Draw the curve
        let f = EasingCurve::new(0.0, 1.0, *function);
        let drawn_curve = f
            .by_ref()
            .graph()
            .map(|(x, y)| center - half_size + Vec2::new(x, y) * PLOT_SIZE);
        gizmos.curve_2d(
            &drawn_curve,
            drawn_curve.domain().spaced_points(samples).unwrap(),
            *color,
        );

        // Show progress along the curve for the current time
        let y = f.sample(now).unwrap() * PLOT_SIZE.y;
        transforms.get_mut(children[0]).unwrap().translation.y = -half_size.y + y;
        transforms.get_mut(children[1]).unwrap().translation =
            -half_size.extend(0.0) + Vec3::new(now * PLOT_SIZE.x, y, 0.0);

        // Show horizontal bar at y value
        gizmos.linestrip_2d(
            [
                center - half_size + Vec2::Y * y,
                center - half_size + Vec2::new(PLOT_SIZE.x, y),
            ],
            color.darker(0.2),
        );
    }
}

pub fn curve_3d( &mut self, curve_3d: impl Curve<Vec3>, times: impl IntoIterator<Item = f32>, color: impl Into<Color>, )

Draw a curve, at the given time points, sampling in 3D.

This should be called for each frame the curve needs to be rendered.

Samples of time points outside of the curve’s domain will be filtered out and won’t contribute to the rendering. If you wish to render the curve outside of its domain you need to create a new curve with an extended domain.

Arguments

• curve_3d some type that implements the Curve trait and samples Vec3s
• times some iterable type yielding f32 which will be used for sampling the curve
• color the color of the curve

Example

fn system(mut gizmos: Gizmos) {
    let domain = Interval::UNIT;
    let curve = FunctionCurve::new(domain, |t| {
        let (x,y) = t.sin_cos();
        Vec3::new(x, y, t)
    });
    gizmos.curve_3d(curve, (0..=100).map(|n| n as f32 / 100.0), RED);
}

pub fn curve_gradient_2d<C>( &mut self, curve_2d: impl Curve<Vec2>, times_with_colors: impl IntoIterator<Item = (f32, C)>, )

where C: Into<Color>,

Draw a curve, at the given time points, sampling in 2D, with a color gradient.

This should be called for each frame the curve needs to be rendered.

Samples of time points outside of the curve’s domain will be filtered out and won’t contribute to the rendering. If you wish to render the curve outside of its domain you need to create a new curve with an extended domain.

Arguments

• curve_2d some type that implements the Curve trait and samples Vec2s
• times_with_colors some iterable type yielding f32 which will be used for sampling the curve together with the color at this position

Example

fn system(mut gizmos: Gizmos) {
    let domain = Interval::UNIT;
    let curve = FunctionCurve::new(domain, |t| Vec2::from(t.sin_cos()));
    gizmos.curve_gradient_2d(
        curve,
        (0..=100).map(|n| n as f32 / 100.0)
                 .map(|t| (t, GREEN.mix(&RED, t)))
    );
}

Examples found in repository

examples/gizmos/2d_gizmos.rs (line 78)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn curve_gradient_3d<C>( &mut self, curve_3d: impl Curve<Vec3>, times_with_colors: impl IntoIterator<Item = (f32, C)>, )

where C: Into<Color>,

Draw a curve, at the given time points, sampling in 3D, with a color gradient.

This should be called for each frame the curve needs to be rendered.

Samples of time points outside of the curve’s domain will be filtered out and won’t contribute to the rendering. If you wish to render the curve outside of its domain you need to create a new curve with an extended domain.

Arguments

• curve_3d some type that implements the Curve trait and samples Vec3s
• times_with_colors some iterable type yielding f32 which will be used for sampling the curve together with the color at this position

Example

fn system(mut gizmos: Gizmos) {
    let domain = Interval::UNIT;
    let curve = FunctionCurve::new(domain, |t| {
        let (x,y) = t.sin_cos();
        Vec3::new(x, y, t)
    });
    gizmos.curve_gradient_3d(
        curve,
        (0..=100).map(|n| n as f32 / 100.0)
                 .map(|t| (t, GREEN.mix(&RED, t)))
    );
}

Examples found in repository

examples/gizmos/3d_gizmos.rs (line 157)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

pub fn clear(&mut self)

Clear all data.

pub fn buffer(&self) -> GizmoBufferView<'_>

Read-only view into the buffers data.

pub fn line(&mut self, start: Vec3, end: Vec3, color: impl Into<Color>)

Draw a line in 3D from start to end.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.line(Vec3::ZERO, Vec3::X, GREEN);
}

Examples found in repository

examples/stress_tests/many_gizmos.rs (line 68)

fn system(config: Res<Config>, time: Res<Time>, mut draw: Gizmos) {
    if !config.fancy {
        for _ in 0..(config.line_count / SYSTEM_COUNT) {
            draw.line(Vec3::NEG_Y, Vec3::Y, Color::BLACK);
        }
    } else {
        for i in 0..(config.line_count / SYSTEM_COUNT) {
            let angle = i as f32 / (config.line_count / SYSTEM_COUNT) as f32 * TAU;

            let vector = Vec2::from(ops::sin_cos(angle)).extend(ops::sin(time.elapsed_secs()));
            let start_color = LinearRgba::rgb(vector.x, vector.z, 0.5);
            let end_color = LinearRgba::rgb(-vector.z, -vector.y, 0.5);

            draw.line_gradient(vector, -vector, start_color, end_color);
        }
    }
}

pub fn line_gradient<C>( &mut self, start: Vec3, end: Vec3, start_color: C, end_color: C, )

where C: Into<Color>,

Draw a line in 3D with a color gradient from start to end.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.line_gradient(Vec3::ZERO, Vec3::X, GREEN, RED);
}

Examples found in repository

examples/stress_tests/many_gizmos.rs (line 78)

fn system(config: Res<Config>, time: Res<Time>, mut draw: Gizmos) {
    if !config.fancy {
        for _ in 0..(config.line_count / SYSTEM_COUNT) {
            draw.line(Vec3::NEG_Y, Vec3::Y, Color::BLACK);
        }
    } else {
        for i in 0..(config.line_count / SYSTEM_COUNT) {
            let angle = i as f32 / (config.line_count / SYSTEM_COUNT) as f32 * TAU;

            let vector = Vec2::from(ops::sin_cos(angle)).extend(ops::sin(time.elapsed_secs()));
            let start_color = LinearRgba::rgb(vector.x, vector.z, 0.5);
            let end_color = LinearRgba::rgb(-vector.z, -vector.y, 0.5);

            draw.line_gradient(vector, -vector, start_color, end_color);
        }
    }
}

pub fn ray(&mut self, start: Vec3, vector: Vec3, color: impl Into<Color>)

Draw a line in 3D from start to start + vector.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.ray(Vec3::Y, Vec3::X, GREEN);
}

Examples found in repository

examples/gizmos/3d_gizmos.rs (lines 167-171)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

pub fn ray_gradient<C>( &mut self, start: Vec3, vector: Vec3, start_color: C, end_color: C, )

where C: Into<Color>,

Draw a line in 3D with a color gradient from start to start + vector.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.ray_gradient(Vec3::Y, Vec3::X, GREEN, RED);
}

pub fn linestrip( &mut self, positions: impl IntoIterator<Item = Vec3>, color: impl Into<Color>, )

Draw a line in 3D made of straight segments between the points.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.linestrip([Vec3::ZERO, Vec3::X, Vec3::Y], GREEN);
}

Examples found in repository

examples/math/cubic_splines.rs (lines 175-178)

fn draw_curve(curve: Res<Curve>, mut gizmos: Gizmos) {
    let Some(ref curve) = curve.0 else {
        return;
    };
    // Scale resolution with curve length so it doesn't degrade as the length increases.
    let resolution = 100 * curve.segments().len();
    gizmos.linestrip(
        curve.iter_positions(resolution).map(|pt| pt.extend(0.0)),
        Color::srgb(1.0, 1.0, 1.0),
    );
}

pub fn linestrip_gradient<C>( &mut self, points: impl IntoIterator<Item = (Vec3, C)>, )

where C: Into<Color>,

Draw a line in 3D made of straight segments between the points, with a color gradient.

This should be called for each frame the lines need to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.linestrip_gradient([
        (Vec3::ZERO, GREEN),
        (Vec3::X, RED),
        (Vec3::Y, BLUE)
    ]);
}

Examples found in repository

examples/3d/mesh_ray_cast.rs (line 70)

fn bounce_ray(mut ray: Ray3d, ray_cast: &mut MeshRayCast, gizmos: &mut Gizmos, color: Color) {
    let mut intersections = Vec::with_capacity(MAX_BOUNCES + 1);
    intersections.push((ray.origin, Color::srgb(30.0, 0.0, 0.0)));

    for i in 0..MAX_BOUNCES {
        // Cast the ray and get the first hit
        let Some((_, hit)) = ray_cast
            .cast_ray(ray, &MeshRayCastSettings::default())
            .first()
        else {
            break;
        };

        // Draw the point of intersection and add it to the list
        let brightness = 1.0 + 10.0 * (1.0 - i as f32 / MAX_BOUNCES as f32);
        intersections.push((hit.point, Color::BLACK.mix(&color, brightness)));
        gizmos.sphere(hit.point, 0.005, Color::BLACK.mix(&color, brightness * 2.0));

        // Reflect the ray off of the surface
        ray.direction = Dir3::new(ray.direction.reflect(hit.normal)).unwrap();
        ray.origin = hit.point + ray.direction * 1e-6;
    }
    gizmos.linestrip_gradient(intersections);
}

pub fn rect( &mut self, isometry: impl Into<Isometry3d>, size: Vec2, color: impl Into<Color>, )

Draw a wireframe rectangle in 3D with the given isometry applied.

If isometry == Isometry3d::IDENTITY then

• the center is at Vec3::ZERO
• the sizes are aligned with the Vec3::X and Vec3::Y axes.

This should be called for each frame the rectangle needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.rect(Isometry3d::IDENTITY, Vec2::ONE, GREEN);
}

Examples found in repository

examples/gizmos/3d_gizmos.rs (lines 137-144)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

pub fn cuboid( &mut self, transform: impl TransformPoint, color: impl Into<Color>, )

Draw a wireframe cube in 3D.

This should be called for each frame the cube needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.cuboid(Transform::IDENTITY, GREEN);
}

Examples found in repository

examples/3d/irradiance_volumes.rs (line 605)

fn draw_gizmo(
    mut gizmos: Gizmos,
    irradiance_volume_query: Query<&GlobalTransform, With<IrradianceVolume>>,
    app_status: Res<AppStatus>,
) {
    if app_status.voxels_visible {
        for transform in irradiance_volume_query.iter() {
            gizmos.cuboid(*transform, GIZMO_COLOR);
        }
    }
}

examples/testbed/3d.rs (lines 318-321)

    pub fn draw_gizmos(mut gizmos: Gizmos) {
        gizmos.cuboid(
            Transform::from_translation(Vec3::X * 2.0).with_scale(Vec3::splat(2.0)),
            RED,
        );
        gizmos
            .sphere(Isometry3d::from_translation(Vec3::X * -2.0), 1.0, GREEN)
            .resolution(30_000 / 3);
    }

examples/gizmos/3d_gizmos.rs (lines 133-136)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

pub fn line_2d(&mut self, start: Vec2, end: Vec2, color: impl Into<Color>)

Draw a line in 2D from start to end.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.line_2d(Vec2::ZERO, Vec2::X, GREEN);
}

Examples found in repository

examples/math/bounding_2d.rs (lines 277-281)

fn draw_ray(gizmos: &mut Gizmos, ray: &RayCast2d) {
    gizmos.line_2d(
        ray.ray.origin,
        ray.ray.origin + *ray.ray.direction * ray.max,
        WHITE,
    );
    draw_filled_circle(gizmos, ray.ray.origin, FUCHSIA);
}

examples/gizmos/2d_gizmos.rs (line 46)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn line_gradient_2d<C>( &mut self, start: Vec2, end: Vec2, start_color: C, end_color: C, )

where C: Into<Color>,

Draw a line in 2D with a color gradient from start to end.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.line_gradient_2d(Vec2::ZERO, Vec2::X, GREEN, RED);
}

pub fn linestrip_2d( &mut self, positions: impl IntoIterator<Item = Vec2>, color: impl Into<Color>, )

Draw a line in 2D made of straight segments between the points.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.linestrip_2d([Vec2::ZERO, Vec2::X, Vec2::Y], GREEN);
}

Examples found in repository

examples/animation/easing_functions.rs (lines 150-159)

fn display_curves(
    mut gizmos: Gizmos,
    ease_functions: Query<(&EaseFunctionPlot, &Transform, &Children)>,
    mut transforms: Query<&mut Transform, Without<EaseFunctionPlot>>,
    mut ui_text: Single<&mut Text>,
    time: Res<Time>,
) {
    let samples = 100;
    let duration = 2.5;
    let time_margin = 0.5;

    let now = ((time.elapsed_secs() % (duration + time_margin * 2.0) - time_margin) / duration)
        .clamp(0.0, 1.0);

    ui_text.0 = format!("Progress: {:.2}", now);

    for (EaseFunctionPlot(function, color), transform, children) in &ease_functions {
        let center = transform.translation.xy();
        let half_size = PLOT_SIZE / 2.0;

        // Draw a box around the curve
        gizmos.linestrip_2d(
            [
                center + half_size,
                center + half_size * Vec2::new(-1., 1.),
                center + half_size * Vec2::new(-1., -1.),
                center + half_size * Vec2::new(1., -1.),
                center + half_size,
            ],
            color.darker(0.4),
        );

        // Draw the curve
        let f = EasingCurve::new(0.0, 1.0, *function);
        let drawn_curve = f
            .by_ref()
            .graph()
            .map(|(x, y)| center - half_size + Vec2::new(x, y) * PLOT_SIZE);
        gizmos.curve_2d(
            &drawn_curve,
            drawn_curve.domain().spaced_points(samples).unwrap(),
            *color,
        );

        // Show progress along the curve for the current time
        let y = f.sample(now).unwrap() * PLOT_SIZE.y;
        transforms.get_mut(children[0]).unwrap().translation.y = -half_size.y + y;
        transforms.get_mut(children[1]).unwrap().translation =
            -half_size.extend(0.0) + Vec3::new(now * PLOT_SIZE.x, y, 0.0);

        // Show horizontal bar at y value
        gizmos.linestrip_2d(
            [
                center - half_size + Vec2::Y * y,
                center - half_size + Vec2::new(PLOT_SIZE.x, y),
            ],
            color.darker(0.2),
        );
    }
}

pub fn linestrip_gradient_2d<C>( &mut self, positions: impl IntoIterator<Item = (Vec2, C)>, )

where C: Into<Color>,

Draw a line in 2D made of straight segments between the points, with a color gradient.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.linestrip_gradient_2d([
        (Vec2::ZERO, GREEN),
        (Vec2::X, RED),
        (Vec2::Y, BLUE)
    ]);
}

Examples found in repository

examples/gizmos/2d_gizmos.rs (lines 60-65)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn ray_2d(&mut self, start: Vec2, vector: Vec2, color: impl Into<Color>)

Draw a line in 2D from start to start + vector.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.ray_2d(Vec2::Y, Vec2::X, GREEN);
}

Examples found in repository

examples/gizmos/2d_gizmos.rs (line 47)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn ray_gradient_2d<C>( &mut self, start: Vec2, vector: Vec2, start_color: C, end_color: C, )

where C: Into<Color>,

Draw a line in 2D with a color gradient from start to start + vector.

This should be called for each frame the line needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.line_gradient(Vec3::Y, Vec3::X, GREEN, RED);
}

pub fn rect_2d( &mut self, isometry: impl Into<Isometry2d>, size: Vec2, color: impl Into<Color>, )

Draw a wireframe rectangle in 2D with the given isometry applied.

If isometry == Isometry2d::IDENTITY then

• the center is at Vec2::ZERO
• the sizes are aligned with the Vec2::X and Vec2::Y axes.

This should be called for each frame the rectangle needs to be rendered.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::ONE, GREEN);
}

Examples found in repository

examples/testbed/2d.rs (line 281)

    pub fn draw_gizmos(mut gizmos: Gizmos) {
        gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::new(200.0, 200.0), RED);
        gizmos
            .circle_2d(Isometry2d::IDENTITY, 200.0, GREEN)
            .resolution(64);
    }

examples/math/bounding_2d.rs (line 187)

fn render_volumes(mut gizmos: Gizmos, query: Query<(&CurrentVolume, &Intersects)>) {
    for (volume, intersects) in query.iter() {
        let color = if **intersects { AQUA } else { ORANGE_RED };
        match volume {
            CurrentVolume::Aabb(a) => {
                gizmos.rect_2d(a.center(), a.half_size() * 2., color);
            }
            CurrentVolume::Circle(c) => {
                gizmos.circle_2d(c.center(), c.radius(), color);
            }
        }
    }
}

#[derive(Component, Deref, DerefMut, Default)]
struct Intersects(bool);

const OFFSET_X: f32 = 125.;
const OFFSET_Y: f32 = 75.;

fn setup(mut commands: Commands) {
    commands.spawn(Camera2d);

    commands.spawn((
        Transform::from_xyz(-OFFSET_X, OFFSET_Y, 0.),
        Shape::Circle(Circle::new(45.)),
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        Transform::from_xyz(0., OFFSET_Y, 0.),
        Shape::Rectangle(Rectangle::new(80., 80.)),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn((
        Transform::from_xyz(OFFSET_X, OFFSET_Y, 0.),
        Shape::Triangle(Triangle2d::new(
            Vec2::new(-40., -40.),
            Vec2::new(-20., 40.),
            Vec2::new(40., 50.),
        )),
        Spin,
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        Transform::from_xyz(-OFFSET_X, -OFFSET_Y, 0.),
        Shape::Line(Segment2d::from_direction_and_length(
            Dir2::from_xy(1., 0.3).unwrap(),
            90.,
        )),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn((
        Transform::from_xyz(0., -OFFSET_Y, 0.),
        Shape::Capsule(Capsule2d::new(25., 50.)),
        Spin,
        DesiredVolume::Aabb,
        Intersects::default(),
    ));

    commands.spawn((
        Transform::from_xyz(OFFSET_X, -OFFSET_Y, 0.),
        Shape::Polygon(RegularPolygon::new(50., 6)),
        Spin,
        DesiredVolume::Circle,
        Intersects::default(),
    ));

    commands.spawn((
        Text::default(),
        Node {
            position_type: PositionType::Absolute,
            top: Val::Px(12.0),
            left: Val::Px(12.0),
            ..default()
        },
    ));
}

fn draw_filled_circle(gizmos: &mut Gizmos, position: Vec2, color: Srgba) {
    for r in [1., 2., 3.] {
        gizmos.circle_2d(position, r, color);
    }
}

fn draw_ray(gizmos: &mut Gizmos, ray: &RayCast2d) {
    gizmos.line_2d(
        ray.ray.origin,
        ray.ray.origin + *ray.ray.direction * ray.max,
        WHITE,
    );
    draw_filled_circle(gizmos, ray.ray.origin, FUCHSIA);
}

fn get_and_draw_ray(gizmos: &mut Gizmos, time: &Time) -> RayCast2d {
    let ray = Vec2::new(ops::cos(time.elapsed_secs()), ops::sin(time.elapsed_secs()));
    let dist = 150. + ops::sin(0.5 * time.elapsed_secs()).abs() * 500.;

    let aabb_ray = Ray2d {
        origin: ray * 250.,
        direction: Dir2::new_unchecked(-ray),
    };
    let ray_cast = RayCast2d::from_ray(aabb_ray, dist - 20.);

    draw_ray(gizmos, &ray_cast);
    ray_cast
}

fn ray_cast_system(
    mut gizmos: Gizmos,
    time: Res<Time>,
    mut volumes: Query<(&CurrentVolume, &mut Intersects)>,
) {
    let ray_cast = get_and_draw_ray(&mut gizmos, &time);

    for (volume, mut intersects) in volumes.iter_mut() {
        let toi = match volume {
            CurrentVolume::Aabb(a) => ray_cast.aabb_intersection_at(a),
            CurrentVolume::Circle(c) => ray_cast.circle_intersection_at(c),
        };
        **intersects = toi.is_some();
        if let Some(toi) = toi {
            draw_filled_circle(
                &mut gizmos,
                ray_cast.ray.origin + *ray_cast.ray.direction * toi,
                LIME,
            );
        }
    }
}

fn aabb_cast_system(
    mut gizmos: Gizmos,
    time: Res<Time>,
    mut volumes: Query<(&CurrentVolume, &mut Intersects)>,
) {
    let ray_cast = get_and_draw_ray(&mut gizmos, &time);
    let aabb_cast = AabbCast2d {
        aabb: Aabb2d::new(Vec2::ZERO, Vec2::splat(15.)),
        ray: ray_cast,
    };

    for (volume, mut intersects) in volumes.iter_mut() {
        let toi = match *volume {
            CurrentVolume::Aabb(a) => aabb_cast.aabb_collision_at(a),
            CurrentVolume::Circle(_) => None,
        };

        **intersects = toi.is_some();
        if let Some(toi) = toi {
            gizmos.rect_2d(
                aabb_cast.ray.ray.origin + *aabb_cast.ray.ray.direction * toi,
                aabb_cast.aabb.half_size() * 2.,
                LIME,
            );
        }
    }
}

fn bounding_circle_cast_system(
    mut gizmos: Gizmos,
    time: Res<Time>,
    mut volumes: Query<(&CurrentVolume, &mut Intersects)>,
) {
    let ray_cast = get_and_draw_ray(&mut gizmos, &time);
    let circle_cast = BoundingCircleCast {
        circle: BoundingCircle::new(Vec2::ZERO, 15.),
        ray: ray_cast,
    };

    for (volume, mut intersects) in volumes.iter_mut() {
        let toi = match *volume {
            CurrentVolume::Aabb(_) => None,
            CurrentVolume::Circle(c) => circle_cast.circle_collision_at(c),
        };

        **intersects = toi.is_some();
        if let Some(toi) = toi {
            gizmos.circle_2d(
                circle_cast.ray.ray.origin + *circle_cast.ray.ray.direction * toi,
                circle_cast.circle.radius(),
                LIME,
            );
        }
    }
}

fn get_intersection_position(time: &Time) -> Vec2 {
    let x = ops::cos(0.8 * time.elapsed_secs()) * 250.;
    let y = ops::sin(0.4 * time.elapsed_secs()) * 100.;
    Vec2::new(x, y)
}

fn aabb_intersection_system(
    mut gizmos: Gizmos,
    time: Res<Time>,
    mut volumes: Query<(&CurrentVolume, &mut Intersects)>,
) {
    let center = get_intersection_position(&time);
    let aabb = Aabb2d::new(center, Vec2::splat(50.));
    gizmos.rect_2d(center, aabb.half_size() * 2., YELLOW);

    for (volume, mut intersects) in volumes.iter_mut() {
        let hit = match volume {
            CurrentVolume::Aabb(a) => aabb.intersects(a),
            CurrentVolume::Circle(c) => aabb.intersects(c),
        };

        **intersects = hit;
    }
}

examples/2d/mesh2d_arcs.rs (line 115)

fn draw_bounds<Shape: Bounded2d + Send + Sync + 'static>(
    q: Query<(&DrawBounds<Shape>, &GlobalTransform)>,
    mut gizmos: Gizmos,
) {
    for (shape, transform) in &q {
        let (_, rotation, translation) = transform.to_scale_rotation_translation();
        let translation = translation.truncate();
        let rotation = rotation.to_euler(EulerRot::XYZ).2;
        let isometry = Isometry2d::new(translation, Rot2::radians(rotation));

        let aabb = shape.0.aabb_2d(isometry);
        gizmos.rect_2d(aabb.center(), aabb.half_size() * 2.0, RED);

        let bounding_circle = shape.0.bounding_circle(isometry);
        gizmos.circle_2d(bounding_circle.center, bounding_circle.radius(), BLUE);
    }
}

examples/math/custom_primitives.rs (line 198)

fn bounding_shapes_2d(
    shapes: Query<&Transform, With<Shape2d>>,
    mut gizmos: Gizmos,
    bounding_shape: Res<State<BoundingShape>>,
) {
    for transform in shapes.iter() {
        // Get the rotation angle from the 3D rotation.
        let rotation = transform.rotation.to_scaled_axis().z;
        let rotation = Rot2::radians(rotation);
        let isometry = Isometry2d::new(transform.translation.xy(), rotation);

        match bounding_shape.get() {
            BoundingShape::None => (),
            BoundingShape::BoundingBox => {
                // Get the AABB of the primitive with the rotation and translation of the mesh.
                let aabb = HEART.aabb_2d(isometry);
                gizmos.rect_2d(aabb.center(), aabb.half_size() * 2., WHITE);
            }
            BoundingShape::BoundingSphere => {
                // Get the bounding sphere of the primitive with the rotation and translation of the mesh.
                let bounding_circle = HEART.bounding_circle(isometry);
                gizmos
                    .circle_2d(bounding_circle.center(), bounding_circle.radius(), WHITE)
                    .resolution(64);
            }
        }
    }
}

examples/gizmos/2d_gizmos.rs (line 67)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn grid( &mut self, isometry: impl Into<Isometry3d>, cell_count: UVec2, spacing: Vec2, color: impl Into<Color>, ) -> GridBuilder2d<'_, Config, Clear>

Draw a 2D grid in 3D.

This should be called for each frame the grid needs to be rendered.

The grid’s default orientation aligns with the XY-plane.

Arguments

• isometry defines the translation and rotation of the grid.
  • the translation specifies the center of the grid
  • defines the orientation of the grid, by default we assume the grid is contained in a plane parallel to the XY plane
• cell_count: defines the amount of cells in the x and y axes
• spacing: defines the distance between cells along the x and y axes
• color: color of the grid

Builder methods

• The skew of the grid can be adjusted using the .skew(...), .skew_x(...) or .skew_y(...) methods. They behave very similar to their CSS equivalents.
• All outer edges can be toggled on or off using .outer_edges(...). Alternatively you can use .outer_edges_x(...) or .outer_edges_y(...) to toggle the outer edges along an axis.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.grid(
        Isometry3d::IDENTITY,
        UVec2::new(10, 10),
        Vec2::splat(2.),
        GREEN
        )
        .skew_x(0.25)
        .outer_edges();
}

Examples found in repository

examples/gizmos/3d_gizmos.rs (lines 103-109)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

pub fn grid_3d( &mut self, isometry: impl Into<Isometry3d>, cell_count: UVec3, spacing: Vec3, color: impl Into<Color>, ) -> GridBuilder3d<'_, Config, Clear>

Draw a 3D grid of voxel-like cells.

This should be called for each frame the grid needs to be rendered.

Arguments

• isometry defines the translation and rotation of the grid.
  • the translation specifies the center of the grid
  • defines the orientation of the grid, by default we assume the grid is aligned with all axes
• cell_count: defines the amount of cells in the x, y and z axes
• spacing: defines the distance between cells along the x, y and z axes
• color: color of the grid

Builder methods

• The skew of the grid can be adjusted using the .skew(...), .skew_x(...), .skew_y(...) or .skew_z(...) methods. They behave very similar to their CSS equivalents.
• All outer edges can be toggled on or off using .outer_edges(...). Alternatively you can use .outer_edges_x(...), .outer_edges_y(...) or .outer_edges_z(...) to toggle the outer edges along an axis.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.grid_3d(
        Isometry3d::IDENTITY,
        UVec3::new(10, 2, 10),
        Vec3::splat(2.),
        GREEN
        )
        .skew_x(0.25)
        .outer_edges();
}

pub fn grid_2d( &mut self, isometry: impl Into<Isometry2d>, cell_count: UVec2, spacing: Vec2, color: impl Into<Color>, ) -> GridBuilder2d<'_, Config, Clear>

Draw a grid in 2D.

This should be called for each frame the grid needs to be rendered.

Arguments

• isometry defines the translation and rotation of the grid.
  • the translation specifies the center of the grid
  • defines the orientation of the grid, by default we assume the grid is aligned with all axes
• cell_count: defines the amount of cells in the x and y axes
• spacing: defines the distance between cells along the x and y axes
• color: color of the grid

Builder methods

• The skew of the grid can be adjusted using the .skew(...), .skew_x(...) or .skew_y(...) methods. They behave very similar to their CSS equivalents.
• All outer edges can be toggled on or off using .outer_edges(...). Alternatively you can use .outer_edges_x(...) or .outer_edges_y(...) to toggle the outer edges along an axis.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.grid_2d(
        Isometry2d::IDENTITY,
        UVec2::new(10, 10),
        Vec2::splat(1.),
        GREEN
        )
        .skew_x(0.25)
        .outer_edges();
}

Examples found in repository

examples/gizmos/2d_gizmos.rs (lines 50-56)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn rounded_rect( &mut self, isometry: impl Into<Isometry3d>, size: Vec2, color: impl Into<Color>, ) -> RoundedRectBuilder<'_, Config, Clear>

Draw a wireframe rectangle with rounded corners in 3D.

This should be called for each frame the rectangle needs to be rendered.

Arguments

• isometry defines the translation and rotation of the rectangle.
  • the translation specifies the center of the rectangle
  • defines orientation of the rectangle, by default we assume the rectangle is contained in a plane parallel to the XY plane.
• size: defines the size of the rectangle. This refers to the ‘outer size’, similar to a bounding box.
• color: color of the rectangle

Builder methods

• The corner radius can be adjusted with the .corner_radius(...) method.
• The resolution of the arcs at each corner (i.e. the level of detail) can be adjusted with the .arc_resolution(...) method.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.rounded_rect(
        Isometry3d::IDENTITY,
        Vec2::ONE,
        GREEN
        )
        .corner_radius(0.25)
        .arc_resolution(10);
}

pub fn rounded_rect_2d( &mut self, isometry: impl Into<Isometry2d>, size: Vec2, color: impl Into<Color>, ) -> RoundedRectBuilder<'_, Config, Clear>

Draw a wireframe rectangle with rounded corners in 2D.

This should be called for each frame the rectangle needs to be rendered.

Arguments

• isometry defines the translation and rotation of the rectangle.
  • the translation specifies the center of the rectangle
  • defines orientation of the rectangle, by default we assume the rectangle aligned with all axes.
• size: defines the size of the rectangle. This refers to the ‘outer size’, similar to a bounding box.
• color: color of the rectangle

Builder methods

• The corner radius can be adjusted with the .corner_radius(...) method.
• The resolution of the arcs at each corner (i.e. the level of detail) can be adjusted with the .arc_resolution(...) method.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.rounded_rect_2d(
        Isometry2d::IDENTITY,
        Vec2::ONE,
        GREEN
        )
        .corner_radius(0.25)
        .arc_resolution(10);
}

Examples found in repository

examples/gizmos/2d_gizmos.rs (line 81)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    let sin_t_scaled = ops::sin(time.elapsed_secs()) * 50.;
    gizmos.line_2d(Vec2::Y * -sin_t_scaled, Vec2::splat(-80.), RED);
    gizmos.ray_2d(Vec2::Y * sin_t_scaled, Vec2::splat(80.), LIME);

    gizmos
        .grid_2d(
            Isometry2d::IDENTITY,
            UVec2::new(16, 9),
            Vec2::new(80., 80.),
            // Dark gray
            LinearRgba::gray(0.05),
        )
        .outer_edges();

    // Triangle
    gizmos.linestrip_gradient_2d([
        (Vec2::Y * 300., BLUE),
        (Vec2::new(-255., -155.), RED),
        (Vec2::new(255., -155.), LIME),
        (Vec2::Y * 300., BLUE),
    ]);

    gizmos.rect_2d(Isometry2d::IDENTITY, Vec2::splat(650.), BLACK);

    gizmos.cross_2d(Vec2::new(-160., 120.), 12., FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| Vec2::new(t, ops::sin(t / 25.0) * 100.0));
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 50.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| (t - 0.5) * 600.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, (t + 300.0) / 600.0)));
    gizmos.curve_gradient_2d(curve, times_and_colors);

    my_gizmos
        .rounded_rect_2d(Isometry2d::IDENTITY, Vec2::splat(630.), BLACK)
        .corner_radius(ops::cos(time.elapsed_secs() / 3.) * 100.);

    // Circles have 32 line-segments by default.
    // You may want to increase this for larger circles.
    my_gizmos
        .circle_2d(Isometry2d::IDENTITY, 300., NAVY)
        .resolution(64);

    my_gizmos.ellipse_2d(
        Rot2::radians(time.elapsed_secs() % TAU),
        Vec2::new(100., 200.),
        YELLOW_GREEN,
    );

    // Arcs default resolution is linearly interpolated between
    // 1 and 32, using the arc length as scalar.
    my_gizmos.arc_2d(
        Rot2::radians(sin_t_scaled / 10.),
        FRAC_PI_2,
        310.,
        ORANGE_RED,
    );
    my_gizmos.arc_2d(Isometry2d::IDENTITY, FRAC_PI_2, 80.0, ORANGE_RED);
    my_gizmos.long_arc_2d_between(Vec2::ZERO, Vec2::X * 20.0, Vec2::Y * 20.0, ORANGE_RED);
    my_gizmos.short_arc_2d_between(Vec2::ZERO, Vec2::X * 40.0, Vec2::Y * 40.0, ORANGE_RED);

    gizmos.arrow_2d(
        Vec2::ZERO,
        Vec2::from_angle(sin_t_scaled / -10. + PI / 2.) * 50.,
        YELLOW,
    );

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow_2d(
            Vec2::ZERO,
            Vec2::from_angle(sin_t_scaled / -10.) * 50.,
            GREEN,
        )
        .with_double_end()
        .with_tip_length(10.);
}

pub fn rounded_cuboid( &mut self, isometry: impl Into<Isometry3d>, size: Vec3, color: impl Into<Color>, ) -> RoundedCuboidBuilder<'_, Config, Clear>

Draw a wireframe cuboid with rounded corners in 3D.

This should be called for each frame the cuboid needs to be rendered.

Arguments

• isometry defines the translation and rotation of the cuboid.
  • the translation specifies the center of the cuboid
  • defines orientation of the cuboid, by default we assume the cuboid aligned with all axes.
• size: defines the size of the cuboid. This refers to the ‘outer size’, similar to a bounding box.
• color: color of the cuboid

Builder methods

• The edge radius can be adjusted with the .edge_radius(...) method.
• The resolution of the arcs at each edge (i.e. the level of detail) can be adjusted with the .arc_resolution(...) method.

Example

fn system(mut gizmos: Gizmos) {
    gizmos.rounded_cuboid(
        Isometry3d::IDENTITY,
        Vec3::ONE,
        GREEN
        )
        .edge_radius(0.25)
        .arc_resolution(10);
}

Examples found in repository

examples/gizmos/3d_gizmos.rs (line 162)

fn draw_example_collection(
    mut gizmos: Gizmos,
    mut my_gizmos: Gizmos<MyRoundGizmos>,
    time: Res<Time>,
) {
    gizmos.grid(
        Quat::from_rotation_x(PI / 2.),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        // Light gray
        LinearRgba::gray(0.65),
    );
    gizmos.grid(
        Isometry3d::new(Vec3::splat(10.0), Quat::from_rotation_x(PI / 3. * 2.)),
        UVec2::splat(20),
        Vec2::new(2., 2.),
        PURPLE,
    );
    gizmos.sphere(Vec3::splat(10.0), 1.0, PURPLE);

    gizmos
        .primitive_3d(
            &Plane3d {
                normal: Dir3::Y,
                half_size: Vec2::splat(1.0),
            },
            Isometry3d::new(
                Vec3::splat(4.0) + Vec2::from(ops::sin_cos(time.elapsed_secs())).extend(0.0),
                Quat::from_rotation_x(PI / 2. + time.elapsed_secs()),
            ),
            GREEN,
        )
        .cell_count(UVec2::new(5, 10))
        .spacing(Vec2::new(0.2, 0.1));

    gizmos.cuboid(
        Transform::from_translation(Vec3::Y * 0.5).with_scale(Vec3::splat(1.25)),
        BLACK,
    );
    gizmos.rect(
        Isometry3d::new(
            Vec3::new(ops::cos(time.elapsed_secs()) * 2.5, 1., 0.),
            Quat::from_rotation_y(PI / 2.),
        ),
        Vec2::splat(2.),
        LIME,
    );

    gizmos.cross(Vec3::new(-1., 1., 1.), 0.5, FUCHSIA);

    let domain = Interval::EVERYWHERE;
    let curve = FunctionCurve::new(domain, |t| {
        (Vec2::from(ops::sin_cos(t * 10.0))).extend(t - 6.0)
    });
    let resolution = ((ops::sin(time.elapsed_secs()) + 1.0) * 100.0) as usize;
    let times_and_colors = (0..=resolution)
        .map(|n| n as f32 / resolution as f32)
        .map(|t| t * 5.0)
        .map(|t| (t, TEAL.mix(&HOT_PINK, t / 5.0)));
    gizmos.curve_gradient_3d(curve, times_and_colors);

    my_gizmos.sphere(Vec3::new(1., 0.5, 0.), 0.5, RED);

    my_gizmos
        .rounded_cuboid(Vec3::new(-2.0, 0.75, -0.75), Vec3::splat(0.9), TURQUOISE)
        .edge_radius(0.1)
        .arc_resolution(4);

    for y in [0., 0.5, 1.] {
        gizmos.ray(
            Vec3::new(1., y, 0.),
            Vec3::new(-3., ops::sin(time.elapsed_secs() * 3.), 0.),
            BLUE,
        );
    }

    my_gizmos
        .arc_3d(
            180.0_f32.to_radians(),
            0.2,
            Isometry3d::new(
                Vec3::ONE,
                Quat::from_rotation_arc(Vec3::Y, Vec3::ONE.normalize()),
            ),
            ORANGE,
        )
        .resolution(10);

    // Circles have 32 line-segments by default.
    my_gizmos.circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3., BLACK);

    // You may want to increase this for larger circles or spheres.
    my_gizmos
        .circle(Quat::from_rotation_arc(Vec3::Z, Vec3::Y), 3.1, NAVY)
        .resolution(64);
    my_gizmos
        .sphere(Isometry3d::IDENTITY, 3.2, BLACK)
        .resolution(64);

    gizmos.arrow(Vec3::ZERO, Vec3::splat(1.5), YELLOW);

    // You can create more complex arrows using the arrow builder.
    gizmos
        .arrow(Vec3::new(2., 0., 2.), Vec3::new(2., 2., 2.), ORANGE_RED)
        .with_double_end()
        .with_tip_length(0.5);
}

Trait Implementations

impl<'w, 's, Config, Clear> Deref for Gizmos<'w, 's, Config, Clear>

where Config: GizmoConfigGroup, Clear: 'static + Send + Sync,

type Target = GizmoBuffer<Config, Clear>

The resulting type after dereferencing.

fn deref(&self) -> &<Gizmos<'w, 's, Config, Clear> as Deref>::Target

Dereferences the value.

impl<'w, 's, Config, Clear> DerefMut for Gizmos<'w, 's, Config, Clear>

where Config: GizmoConfigGroup, Clear: 'static + Send + Sync,

fn deref_mut(&mut self) -> &mut <Gizmos<'w, 's, Config, Clear> as Deref>::Target

Mutably dereferences the value.

impl<Config, Clear> SystemParam for Gizmos<'_, '_, Config, Clear>

where Config: GizmoConfigGroup, Clear: 'static + Send + Sync,

type State = GizmosFetchState<Config, Clear>

Used to store data which persists across invocations of a system.

type Item<'w, 's> = Gizmos<'w, 's, Config, Clear>

The item type returned when constructing this system param. The value of this associated type should be Self, instantiated with new lifetimes.

fn init_state( world: &mut World, system_meta: &mut SystemMeta, ) -> <Gizmos<'_, '_, Config, Clear> as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.

unsafe fn new_archetype( state: &mut <Gizmos<'_, '_, Config, Clear> as SystemParam>::State, archetype: &Archetype, system_meta: &mut SystemMeta, )

For the specified Archetype, registers the components accessed by this SystemParam (if applicable).a

fn apply( state: &mut <Gizmos<'_, '_, Config, Clear> as SystemParam>::State, system_meta: &SystemMeta, world: &mut World, )

Applies any deferred mutations stored in this SystemParam’s state. This is used to apply Commands during ApplyDeferred.

unsafe fn validate_param( state: &<Gizmos<'_, '_, Config, Clear> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'_>, ) -> Result<(), SystemParamValidationError>

Validates that the param can be acquired by the get_param.

unsafe fn get_param<'w, 's>( state: &'s mut <Gizmos<'_, '_, Config, Clear> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick, ) -> <Gizmos<'_, '_, Config, Clear> as SystemParam>::Item<'w, 's>

Creates a parameter to be passed into a SystemParamFunction.

fn queue( state: &mut Self::State, system_meta: &SystemMeta, world: DeferredWorld<'_>, )

Queues any deferred mutations to be applied at the next ApplyDeferred.

impl<'w, 's, Config, Clear> ReadOnlySystemParam for Gizmos<'w, 's, Config, Clear>

where Config: GizmoConfigGroup, Clear: 'static + Send + Sync, Deferred<'s, GizmoBuffer<Config, Clear>>: ReadOnlySystemParam, Res<'w, GizmoConfigStore>: ReadOnlySystemParam,