First half of buffers

src/vertex.rs

@@ -0,0 +1,47 @@
+#[repr(C)]
+#[derive(Copy, Clone, Debug, bytemuck::Pod, bytemuck::Zeroable)]
+pub struct Vertex {
+    position: [f32; 3],
+    color: [f32; 3],
+}
+
+impl Vertex {
+    pub fn desc<'a>() -> wgpu::VertexBufferLayout<'a> {
+        wgpu::VertexBufferLayout {
+            array_stride: std::mem::size_of::<Vertex>() as wgpu::BufferAddress,
+            step_mode: wgpu::InputStepMode::Vertex,
+            // this oculd be shortened with:
+            // attributes: &wgpu::vertex_attr_array![0 => Float32x3, 1 => Float32x3],
+            attributes: &[
+                wgpu::VertexAttribute {
+                    offset: 0,
+                    shader_location: 0,
+                    format: wgpu::VertexFormat::Float32x3,
+                },
+                wgpu::VertexAttribute {
+                    offset: std::mem::size_of::<[f32; 3]>() as wgpu::BufferAddress,
+                    shader_location: 1,
+                    format: wgpu::VertexFormat::Float32x3,
+                },
+            ],
+        }
+    }
+}
+
+pub const VERTICES: &[Vertex] = &[
+    // Top
+    Vertex {
+        position: [0.0, 0.5, 0.0],
+        color: [1.0, 0.0, 0.0],
+    },
+    // Left
+    Vertex {
+        position: [-0.5, -0.5, 0.0],
+        color: [0.0, 1.0, 0.0],
+    },
+    // Right
+    Vertex {
+        position: [0.5, -0.5, 0.0],
+        color: [0.0, 0.0, 1.0],
+    },
+];