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//! Terrain vertex definition.
use bytemuck::{Pod, Zeroable};
/// Vertex for terrain mesh rendering (position + UV + normal).
#[repr(C)]
#[derive(Debug, Clone, Copy, Pod, Zeroable)]
pub struct TerrainVertex {
/// Position `[x, y, z]` in camera-relative meters.
pub position: [f32; 3],
/// Texture coordinate `[u, v]`.
pub uv: [f32; 2],
/// Surface normal `[nx, ny, nz]`.
pub normal: [f32; 3],
}
impl TerrainVertex {
/// Vertex buffer layout descriptor.
pub fn layout() -> wgpu::VertexBufferLayout<'static> {
wgpu::VertexBufferLayout {
array_stride: std::mem::size_of::<TerrainVertex>() as wgpu::BufferAddress,
step_mode: wgpu::VertexStepMode::Vertex,
attributes: &[
// position
wgpu::VertexAttribute {
offset: 0,
shader_location: 0,
format: wgpu::VertexFormat::Float32x3,
},
// uv
wgpu::VertexAttribute {
offset: 12,
shader_location: 1,
format: wgpu::VertexFormat::Float32x2,
},
// normal
wgpu::VertexAttribute {
offset: 20,
shader_location: 2,
format: wgpu::VertexFormat::Float32x3,
},
],
}
}
}