571bf35109
Fixes: https://github.com/damus-io/notedeck/issues/902 Signed-off-by: William Casarin <jb55@jb55.com>
72 lines
2.7 KiB
Rust
72 lines
2.7 KiB
Rust
use eframe::egui_wgpu::wgpu;
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#[repr(C)]
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#[derive(Clone, Copy, bytemuck::Pod, bytemuck::Zeroable)]
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pub struct Vertex {
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pos: [f32; 3],
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normal: [f32; 3],
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}
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impl Vertex {
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pub const ATTRS: [wgpu::VertexAttribute; 2] = wgpu::vertex_attr_array![
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0 => Float32x3, // position
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1 => Float32x3 // normal
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];
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pub const LAYOUT: wgpu::VertexBufferLayout<'static> = wgpu::VertexBufferLayout {
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array_stride: std::mem::size_of::<Vertex>() as wgpu::BufferAddress,
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step_mode: wgpu::VertexStepMode::Vertex,
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attributes: &Self::ATTRS,
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};
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}
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// 6 faces * 4 verts. Each face has a constant normal.
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#[rustfmt::skip]
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pub const CUBE_VERTICES: [Vertex; 24] = [
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// -Z (back)
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Vertex { pos: [-0.5,-0.5,-0.5], normal: [0.0, 0.0,-1.0] },
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Vertex { pos: [ 0.5,-0.5,-0.5], normal: [0.0, 0.0,-1.0] },
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Vertex { pos: [ 0.5, 0.5,-0.5], normal: [0.0, 0.0,-1.0] },
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Vertex { pos: [-0.5, 0.5,-0.5], normal: [0.0, 0.0,-1.0] },
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// +Z (front)
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Vertex { pos: [-0.5,-0.5, 0.5], normal: [0.0, 0.0, 1.0] },
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Vertex { pos: [ 0.5,-0.5, 0.5], normal: [0.0, 0.0, 1.0] },
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Vertex { pos: [ 0.5, 0.5, 0.5], normal: [0.0, 0.0, 1.0] },
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Vertex { pos: [-0.5, 0.5, 0.5], normal: [0.0, 0.0, 1.0] },
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// -X (left)
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Vertex { pos: [-0.5,-0.5,-0.5], normal: [-1.0, 0.0, 0.0] },
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Vertex { pos: [-0.5, 0.5,-0.5], normal: [-1.0, 0.0, 0.0] },
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Vertex { pos: [-0.5, 0.5, 0.5], normal: [-1.0, 0.0, 0.0] },
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Vertex { pos: [-0.5,-0.5, 0.5], normal: [-1.0, 0.0, 0.0] },
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// +X (right)
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Vertex { pos: [ 0.5,-0.5,-0.5], normal: [1.0, 0.0, 0.0] },
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Vertex { pos: [ 0.5, 0.5,-0.5], normal: [1.0, 0.0, 0.0] },
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Vertex { pos: [ 0.5, 0.5, 0.5], normal: [1.0, 0.0, 0.0] },
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Vertex { pos: [ 0.5,-0.5, 0.5], normal: [1.0, 0.0, 0.0] },
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// -Y (bottom)
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Vertex { pos: [-0.5,-0.5,-0.5], normal: [0.0,-1.0, 0.0] },
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Vertex { pos: [-0.5,-0.5, 0.5], normal: [0.0,-1.0, 0.0] },
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Vertex { pos: [ 0.5,-0.5, 0.5], normal: [0.0,-1.0, 0.0] },
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Vertex { pos: [ 0.5,-0.5,-0.5], normal: [0.0,-1.0, 0.0] },
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// +Y (top)
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Vertex { pos: [-0.5, 0.5,-0.5], normal: [0.0, 1.0, 0.0] },
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Vertex { pos: [-0.5, 0.5, 0.5], normal: [0.0, 1.0, 0.0] },
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Vertex { pos: [ 0.5, 0.5, 0.5], normal: [0.0, 1.0, 0.0] },
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Vertex { pos: [ 0.5, 0.5,-0.5], normal: [0.0, 1.0, 0.0] },
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];
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// 6 faces * 2 triangles * 3 indices — all CCW when viewed from the outside
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pub const CUBE_INDICES: [u16; 36] = [
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// -Z (back) normal (0, 0,-1)
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0, 3, 2, 0, 2, 1, // +Z (front) normal (0, 0, 1)
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4, 5, 6, 4, 6, 7, // -X (left) normal (-1,0, 0)
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8, 11, 10, 8, 10, 9, // +X (right) normal ( 1,0, 0)
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12, 13, 14, 12, 14, 15, // -Y (bottom) normal (0,-1, 0)
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16, 18, 17, 16, 19, 18, // +Y (top) normal (0, 1, 0)
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20, 21, 22, 20, 22, 23,
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];
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