53 lines
1.3 KiB
Rust
53 lines
1.3 KiB
Rust
pub struct Camera {
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pub eye: cgmath::Point3<f32>,
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pub target: cgmath::Point3<f32>,
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pub up: cgmath::Vector3<f32>,
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pub aspect: f32,
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pub fovy: f32,
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pub znear: f32,
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pub zfar: f32,
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}
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impl Camera {
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fn build_view_projection_matrix(&self) -> cgmath::Matrix4<f32> {
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let view = cgmath::Matrix4::look_at_rh(self.eye, self.target, self.up);
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let proj = cgmath::perspective(cgmath::Deg(self.fovy), self.aspect, self.znear, self.zfar);
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OPENGL_TO_WGPU_MATRIX * proj * view
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}
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pub fn update_aspect(&mut self, aspect: f32) {
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self.aspect = aspect;
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}
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}
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#[rustfmt::skip]
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pub const OPENGL_TO_WGPU_MATRIX: cgmath::Matrix4<f32> = cgmath::Matrix4::new(
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1.0, 0.0, 0.0, 0.0,
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0.0, 1.0, 0.0, 0.0,
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0.0, 0.0, 0.5, 0.5,
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0.0, 0.0, 0.0, 1.0,
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);
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unsafe impl bytemuck::Pod for CameraUniform {}
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unsafe impl bytemuck::Zeroable for CameraUniform {}
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#[repr(C)]
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#[derive(Debug, Copy, Clone)]
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pub struct CameraUniform {
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view_proj: cgmath::Matrix4<f32>,
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}
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impl Default for CameraUniform {
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fn default() -> CameraUniform {
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use cgmath::SquareMatrix;
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Self {
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view_proj: cgmath::Matrix4::identity(),
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}
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}
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}
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impl CameraUniform {
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pub fn update_view_proj(&mut self, camera: &Camera) {
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self.view_proj = camera.build_view_projection_matrix();
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}
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}
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