Add Uniforms

experiments/2024-10-30/src/render.rs

@@ -47,7 +47,7 @@ impl Renderer {
         let transform_buffer =
             device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
                 label: None,
-                contents: bytemuck::cast_slice(&[default_transform()]),
+                contents: bytemuck::cast_slice(&[Uniforms::default()]),
                 usage: wgpu::BufferUsages::UNIFORM,
             });
 
@@ -237,6 +237,19 @@ impl Renderer {
     }
 }
 
+#[derive(Clone, Copy, bytemuck::Pod, bytemuck::Zeroable)]
+#[repr(C)]
+pub struct Uniforms {
+    pub transform: Mat4,
+}
+
+impl Default for Uniforms {
+    fn default() -> Self {
+        let transform = default_transform();
+        Self { transform }
+    }
+}
+
 fn default_transform() -> Mat4 {
     let fov_y_radians = std::f32::consts::PI / 2.;
     let aspect_ratio = 1.;