73 lines
2.6 KiB
Rust
73 lines
2.6 KiB
Rust
use super::model::Vertex;
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pub struct Instance {
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pub position: cgmath::Vector3<f32>,
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pub rotation: cgmath::Quaternion<f32>,
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}
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#[repr(C)]
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#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
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pub struct InstanceRaw {
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pub model: [[f32; 4]; 4],
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pub normal: [[f32; 3]; 3],
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}
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impl Instance {
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pub fn to_raw(&self) -> InstanceRaw {
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InstanceRaw {
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model: (cgmath::Matrix4::from_translation(self.position)
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* cgmath::Matrix4::from(self.rotation))
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.into(),
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normal: cgmath::Matrix3::from(self.rotation).into(),
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}
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}
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}
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impl Vertex for InstanceRaw {
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fn desc<'a>() -> wgpu::VertexBufferLayout<'a> {
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use std::mem;
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wgpu::VertexBufferLayout {
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array_stride: mem::size_of::<InstanceRaw>() as wgpu::BufferAddress,
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step_mode: wgpu::VertexStepMode::Instance,
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attributes: &[
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// model matrix
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wgpu::VertexAttribute {
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offset: 0,
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shader_location: 5,
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format: wgpu::VertexFormat::Float32x4,
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},
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wgpu::VertexAttribute {
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offset: mem::size_of::<[f32; 4]>() as wgpu::BufferAddress,
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shader_location: 6,
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format: wgpu::VertexFormat::Float32x4,
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},
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wgpu::VertexAttribute {
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offset: mem::size_of::<[f32; 8]>() as wgpu::BufferAddress,
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shader_location: 7,
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format: wgpu::VertexFormat::Float32x4,
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},
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wgpu::VertexAttribute {
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offset: mem::size_of::<[f32; 12]>() as wgpu::BufferAddress,
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shader_location: 8,
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format: wgpu::VertexFormat::Float32x4,
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},
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// normal matrix
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wgpu::VertexAttribute {
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offset: mem::size_of::<[f32; 16]>() as wgpu::BufferAddress,
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shader_location: 9,
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format: wgpu::VertexFormat::Float32x3,
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},
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wgpu::VertexAttribute {
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offset: mem::size_of::<[f32; 19]>() as wgpu::BufferAddress,
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shader_location: 10,
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format: wgpu::VertexFormat::Float32x3,
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},
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wgpu::VertexAttribute {
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offset: mem::size_of::<[f32; 22]>() as wgpu::BufferAddress,
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shader_location: 11,
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format: wgpu::VertexFormat::Float32x3,
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},
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],
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}
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}
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}
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