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Add normals to vertices

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This commit is contained in:
Hanno Braun 2024-10-31 22:01:23 +01:00
parent c29741730b
commit 6b5b54574f
1 changed files with 43 additions and 5 deletions
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48
experiments/2024-10-30/src/render.rs
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@ -97,11 +97,19 @@ impl Renderer {
array_stride: size_of::<Vertex>()
as wgpu::BufferAddress,
step_mode: wgpu::VertexStepMode::Vertex,
attributes: &[wgpu::VertexAttribute {
format: wgpu::VertexFormat::Float32x3,
offset: 0,
shader_location: 0,
}],
attributes: &[
wgpu::VertexAttribute {
format: wgpu::VertexFormat::Float32x3,
offset: 0,
shader_location: 0,
},
wgpu::VertexAttribute {
format: wgpu::VertexFormat::Float32x3,
offset: size_of::<[f32; 3]>()
as wgpu::BufferAddress,
shader_location: 1,
},
],
}],
},
fragment: Some(wgpu::FragmentState {
@ -169,11 +177,26 @@ impl Renderer {
let triangle = triangle.map(|index| Point {
coords: mesh.vertices()[index as usize],
});
let normal = {
let [a, b, c] = triangle;
let ab = b - a;
let ac = c - a;
Vector {
coords: [
ab.y() * ac.z() - ab.z() * ac.y(),
ab.z() * ac.x() - ab.x() * ac.z(),
ab.x() * ac.y() - ab.z() * ac.x(),
],
}
};
for point in triangle {
let index = vertices.len() as u32;
let vertex = Vertex {
position: point.coords,
normal: normal.coords,
};
indices.push(index);
@ -365,8 +388,23 @@ pub struct Vector {
pub coords: [f32; 3],
}
impl Vector {
pub fn x(&self) -> f32 {
self.coords[0]
}
pub fn y(&self) -> f32 {
self.coords[1]
}
pub fn z(&self) -> f32 {
self.coords[2]
}
}
#[derive(Clone, Copy, bytemuck::Pod, bytemuck::Zeroable)]
#[repr(C)]
pub struct Vertex {
pub position: [f32; 3],
pub normal: [f32; 3],
}