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use std::f32::consts::FRAC_PI_2;
use bevy::window::WindowResolution;
use bevy::{
color::palettes::{css::TOMATO, tailwind::LIME_500},
mesh::{PrimitiveTopology, VertexAttributeValues},
prelude::*,
};
use bevy_infinite_grid::{InfiniteGridBundle, InfiniteGridPlugin, InfiniteGridSettings};
use bevy_panorbit_camera::{PanOrbitCamera, PanOrbitCameraPlugin};
use bevy_points::{plugin::PointsPlugin, prelude::PointsMaterial};
use nalgebra::{Point2, Rotation2, Translation2, Vector2};
use curvo::prelude::*;
mod materials;
use materials::*;
fn main() {
App::new()
.add_plugins(DefaultPlugins.set(WindowPlugin {
primary_window: Some(Window {
resolution: WindowResolution::new(640, 480),
..Default::default()
}),
..Default::default()
}))
.add_plugins(LineMaterialPlugin)
.add_plugins(InfiniteGridPlugin)
.add_plugins(PanOrbitCameraPlugin)
.add_plugins(PointsPlugin)
.add_plugins(AppPlugin)
.run();
}
struct AppPlugin;
impl Plugin for AppPlugin {
fn build(&self, app: &mut bevy::prelude::App) {
app.add_systems(Startup, setup).add_systems(Update, update);
}
}
#[derive(Component)]
struct FirstCurve(pub NurbsCurve2D<f64>);
#[derive(Component)]
struct SecondCurve(pub NurbsCurve2D<f64>);
fn setup(
mut commands: Commands,
mut meshes: ResMut<Assets<Mesh>>,
mut line_materials: ResMut<Assets<LineMaterial>>,
_points_materials: ResMut<Assets<PointsMaterial>>,
) {
let points = vec![
Point2::new(-1.0, -1.0),
Point2::new(1.0, -1.0),
Point2::new(1.0, 0.0),
Point2::new(-1.0, 0.0),
Point2::new(-1.0, 1.0),
Point2::new(1.0, 1.0),
];
let curve = NurbsCurve2D::interpolate(&points, 3).unwrap();
let line_vertices = curve
.tessellate(Some(1e-8))
.iter()
.map(|p| p.cast::<f32>())
.map(|p| [p.x, p.y, 0.])
.collect();
let line = Mesh::new(PrimitiveTopology::LineStrip, default()).with_inserted_attribute(
Mesh::ATTRIBUTE_POSITION,
VertexAttributeValues::Float32x3(line_vertices),
);
commands
.spawn((
Mesh3d(meshes.add(line)),
MeshMaterial3d(line_materials.add(LineMaterial {
color: TOMATO.into(),
..Default::default()
})),
))
.insert(FirstCurve(curve.clone()))
.insert(Name::new("curve"));
let circle =
NurbsCurve2D::try_circle(&Point2::origin(), &Vector2::x(), &Vector2::y(), 1.).unwrap();
let line_vertices = circle
.tessellate(Some(1e-8))
.iter()
.map(|p| p.cast::<f32>())
.map(|p| [p.x, p.y, 0.])
.collect();
let line = Mesh::new(PrimitiveTopology::LineStrip, default()).with_inserted_attribute(
Mesh::ATTRIBUTE_POSITION,
VertexAttributeValues::Float32x3(line_vertices),
);
commands
.spawn((
Mesh3d(meshes.add(line)),
MeshMaterial3d(line_materials.add(LineMaterial {
color: LIME_500.into(),
..Default::default()
})),
))
.insert(SecondCurve(circle.clone()))
.insert(Name::new("circle"));
/*
let traversed = BoundingBoxTraversal::try_traverse(&curve, &circle, None, None);
if let Ok(traversed) = traversed {
let n = traversed.pairs_iter().count();
traversed
.pairs_iter()
.enumerate()
.for_each(|(idx, (a, b))| {
let t = (idx as f32) / (n as f32);
let hue = t * 360. * 1e2 % 360.;
let color = Color::hsl(hue, 0.5, 0.5);
let b0 = a.bounding_box();
let b1 = b.bounding_box();
let vertices = b0
.lines()
.iter()
.chain(b1.lines().iter())
.flat_map(|(a, b)| {
[a, b]
.iter()
.map(|p| p.cast::<f32>())
.map(|p| [p.x, p.y, 0.])
.collect::<Vec<_>>()
})
.collect();
let line = Mesh::new(PrimitiveTopology::LineList, default())
.with_inserted_attribute(
Mesh::ATTRIBUTE_POSITION,
VertexAttributeValues::Float32x3(vertices),
);
commands
.spawn(MaterialMeshBundle {
mesh: meshes.add(line),
material: line_materials.add(LineMaterial {
// color: Color::WHITE,
color,
opacity: 0.5,
alpha_mode: AlphaMode::Blend,
}),
// visibility: Visibility::Hidden,
..Default::default()
})
.insert(Name::new("bounding box"));
[a.curve(), b.curve()].iter().for_each(|curve| {
let line_vertices = curve
.tessellate(Some(1e-8))
.iter()
.map(|p| p.cast::<f32>())
.map(|p| [p.x, p.y, 0.])
.collect();
let line = Mesh::new(PrimitiveTopology::LineStrip, default())
.with_inserted_attribute(
Mesh::ATTRIBUTE_POSITION,
VertexAttributeValues::Float32x3(line_vertices),
);
commands
.spawn(MaterialMeshBundle {
mesh: meshes.add(line),
material: line_materials.add(LineMaterial {
color: Color::WHITE,
..Default::default()
}),
// visibility: Visibility::Hidden,
..Default::default()
})
.insert(Name::new("segment"));
});
});
}
*/
/*
let intersections = curve.find_intersection(&circle, None);
if let Ok(intersections) = intersections {
commands
.spawn(MaterialMeshBundle {
mesh: meshes.add(PointsMesh::from_iter(intersections.iter().flat_map(|it| {
[
Vec3::from(it.a().0.cast::<f32>().coords.to_homogeneous()),
Vec3::from(it.b().0.cast::<f32>().coords.to_homogeneous()),
]
}))),
material: points_materials.add(PointsMaterial {
settings: PointsShaderSettings {
point_size: 0.025,
color: Color::WHITE,
..Default::default()
},
circle: true,
..Default::default()
}),
// visibility: Visibility::Hidden,
..Default::default()
})
.insert(Name::new("intersection points"));
}
*/
let center = Vec3::ZERO;
commands.spawn((
Transform::from_translation(center + Vec3::new(0., 0., 8.)).looking_at(center, Vec3::Y),
PanOrbitCamera::default(),
));
commands.spawn(InfiniteGridBundle {
settings: InfiniteGridSettings {
x_axis_color: Color::BLACK,
z_axis_color: Color::BLACK,
..Default::default()
},
transform: Transform::from_rotation(Quat::from_rotation_x(FRAC_PI_2)),
..Default::default()
});
}
#[allow(clippy::type_complexity)]
fn update(
time: Res<Time>,
mut set: ParamSet<(
Query<&Transform, With<Camera>>,
Query<(&FirstCurve, &mut Transform), With<FirstCurve>>,
Query<(&SecondCurve, &mut Transform), With<SecondCurve>>,
)>,
mut gizmos: Gizmos,
) {
let speed = 1.0;
let elapsed = time.elapsed_secs() * speed;
let delta = time.delta_secs() * speed;
set.p1().iter_mut().for_each(|(_, mut tr1)| {
tr1.rotate_local_z(-delta * 0.25);
});
set.p2().iter_mut().for_each(|(_, mut tr2)| {
let x = elapsed.cos() * 1.25;
let y = elapsed.sin() * 1.25;
*tr2 = tr2.with_translation(Vec3::new(x, y, 0.));
});
let c1 = set
.p1()
.iter()
.map(|(c1, tr1)| {
let trans1 = Rotation2::new(tr1.rotation.to_euler(EulerRot::XYZ).2);
c1.0.transformed(&trans1.cast::<f64>().into())
})
.next()
.unwrap();
let c2 = set
.p2()
.iter()
.map(|(c2, tr2)| {
let trans2 = Translation2::new(tr2.translation.x, tr2.translation.y);
c2.0.transformed(&trans2.cast::<f64>().into())
})
.next()
.unwrap();
/*
let traversed = BoundingBoxTraversal::try_traverse(&c1, &c2, None, None);
if let Ok(traversed) = traversed {
let n = traversed.pairs_iter().count();
traversed
.pairs_iter()
.enumerate()
.for_each(|(idx, (a, b))| {
let t = (idx as f32) / (n as f32);
let hue = t * 360. * 1e2 % 360.;
let b0 = a.bounding_box();
let b1 = b.bounding_box();
let color = Color::hsla(hue, 0.5, 0.5, 0.45);
/*
gizmos.cuboid(
Transform::from_translation(b0.center().to_homogeneous().cast::<f32>().into())
.with_scale(b0.size().to_homogeneous().cast::<f32>().into()),
color,
);
*/
gizmos.cuboid(
Transform::from_translation(b1.center().to_homogeneous().cast::<f32>().into())
.with_scale(b1.size().to_homogeneous().cast::<f32>().into()),
// color,
Color::GRAY.with_a(0.75),
);
});
}
*/
let p0 = set.p0();
let camera_transform = p0.single().unwrap();
let intersections = c1.find_intersection(&c2, None);
if let Ok(intersections) = intersections {
intersections.iter().for_each(|it| {
let p: Vec3 = it.a().0.coords.to_homogeneous().cast::<f32>().into();
let normal = (camera_transform.translation - p).normalize();
let _dir = Dir3::new_unchecked(normal);
gizmos.circle(p, 1e-2 * 2.5, Color::WHITE);
});
}
}