Struct Camera

pub struct Camera {
    pub view: Transform,
    pub proj: Projection,
}

Representation of camera to simplify matrices calculation

Fields

view: Transform

proj: Projection

Implementations

impl Camera

pub fn new(view: Transform, proj: Projection) -> Self

Examples found in repository

examples/texture_cube/main.rs (lines 18-21)

fn main() -> Result<(), Box<dyn Error>> {
    //Create app and main window.
    let mut app = Tridify::new();
    let window = app.create_window()?;
    let gpu_ctx = window.ctx();

    //Load texture from path.
    let texture = Texture::from_path(gpu_ctx, Path::new(r#"examples/texture_cube/texture.png"#));

    //Sampler defines how the texture will be rendered in shapes.
    let sampler = Sampler::new_default(gpu_ctx);

    let camera = Camera::new(
        Transform::from_look_at(Vec3::NEG_Z * 10.0 + Vec3::Y * 10.0, Vec3::ZERO, Vec3::Y),
        Projection::default(),
    );
    let mut camera_buf = camera.build_buffer(gpu_ctx);

    //Create brush to draw the shapes.
    let mut brush = Brush::from_source(
        BrushDesc::default(),
        gpu_ctx,
        include_str!("shader.wgsl").to_string(),
    )?;
    //Bind camera, sampler and texture to the brush. Make sure group_index and loc_index are the same as
    //in the shader.
    brush.bind(0, 0, camera_buf.clone());
    brush.bind(1, 0, texture);
    brush.bind(1, 1, sampler);

    //Create and bake a shape batch with a cube in it.
    let shape_buffer = ShapeBatch::new()
        .add_cube(
            Vec3::ZERO,
            Quat::from_rotation_x(35.) * Quat::from_rotation_y(35.),
            Vec3::ONE * 5.,
            Color::WHITE,
        )
        .bake_buffers(gpu_ctx);

    //Setup the window render loop.
    window.set_render_loop(move |gpu, frame_ctx| {
        let model = Mat4::from_rotation_y(frame_ctx.elapsed_time as f32);
        let mvp = camera.build_camera_matrix() * model;

        //Updating the gpu buffer will update all brushes binded as well.
        camera_buf.write(gpu, bytemuck::cast_slice(&mvp.to_cols_array()));

        //Render frame as usual.
        let mut pass_builder = gpu.create_render_builder();
        let mut render_pass = pass_builder.build_render_pass(RenderOptions::default());
        render_pass.render_shapes(gpu, &mut brush, &shape_buffer);
        render_pass.finish();
        pass_builder.finish_render(gpu);
    });

    // Start program.
    app.start(());
}

pub fn build_camera_matrix(&self) -> Mat4

Examples found in repository

examples/texture_cube/main.rs (line 49)

fn main() -> Result<(), Box<dyn Error>> {
    //Create app and main window.
    let mut app = Tridify::new();
    let window = app.create_window()?;
    let gpu_ctx = window.ctx();

    //Load texture from path.
    let texture = Texture::from_path(gpu_ctx, Path::new(r#"examples/texture_cube/texture.png"#));

    //Sampler defines how the texture will be rendered in shapes.
    let sampler = Sampler::new_default(gpu_ctx);

    let camera = Camera::new(
        Transform::from_look_at(Vec3::NEG_Z * 10.0 + Vec3::Y * 10.0, Vec3::ZERO, Vec3::Y),
        Projection::default(),
    );
    let mut camera_buf = camera.build_buffer(gpu_ctx);

    //Create brush to draw the shapes.
    let mut brush = Brush::from_source(
        BrushDesc::default(),
        gpu_ctx,
        include_str!("shader.wgsl").to_string(),
    )?;
    //Bind camera, sampler and texture to the brush. Make sure group_index and loc_index are the same as
    //in the shader.
    brush.bind(0, 0, camera_buf.clone());
    brush.bind(1, 0, texture);
    brush.bind(1, 1, sampler);

    //Create and bake a shape batch with a cube in it.
    let shape_buffer = ShapeBatch::new()
        .add_cube(
            Vec3::ZERO,
            Quat::from_rotation_x(35.) * Quat::from_rotation_y(35.),
            Vec3::ONE * 5.,
            Color::WHITE,
        )
        .bake_buffers(gpu_ctx);

    //Setup the window render loop.
    window.set_render_loop(move |gpu, frame_ctx| {
        let model = Mat4::from_rotation_y(frame_ctx.elapsed_time as f32);
        let mvp = camera.build_camera_matrix() * model;

        //Updating the gpu buffer will update all brushes binded as well.
        camera_buf.write(gpu, bytemuck::cast_slice(&mvp.to_cols_array()));

        //Render frame as usual.
        let mut pass_builder = gpu.create_render_builder();
        let mut render_pass = pass_builder.build_render_pass(RenderOptions::default());
        render_pass.render_shapes(gpu, &mut brush, &shape_buffer);
        render_pass.finish();
        pass_builder.finish_render(gpu);
    });

    // Start program.
    app.start(());
}

Trait Implementations

impl Default for Camera

fn default() -> Camera

Returns the “default value” for a type.

impl ToGpuBuf for Camera

fn build_buffer(&self, wnd: &GpuCtx) -> GpuBuffer