tolelom
b5a6159526
Implements ShadowMap (2048x2048 Depth32Float texture with comparison sampler), shadow_shader.wgsl (depth-only vertex shader), shadow_pipeline (front-face culling, depth bias constant=2/slope=2.0), and associated uniform types. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
78 lines
2.7 KiB
Rust
78 lines
2.7 KiB
Rust
use crate::vertex::MeshVertex;
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use crate::shadow::{SHADOW_FORMAT, ShadowPassUniform};
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pub fn shadow_pass_bind_group_layout(device: &wgpu::Device) -> wgpu::BindGroupLayout {
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device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
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label: Some("Shadow Pass Bind Group Layout"),
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entries: &[
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wgpu::BindGroupLayoutEntry {
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binding: 0,
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visibility: wgpu::ShaderStages::VERTEX,
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ty: wgpu::BindingType::Buffer {
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ty: wgpu::BufferBindingType::Uniform,
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has_dynamic_offset: true,
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min_binding_size: wgpu::BufferSize::new(
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std::mem::size_of::<ShadowPassUniform>() as u64,
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),
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},
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count: None,
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},
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],
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})
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}
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pub fn create_shadow_pipeline(
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device: &wgpu::Device,
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shadow_pass_layout: &wgpu::BindGroupLayout,
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) -> wgpu::RenderPipeline {
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let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
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label: Some("Shadow Shader"),
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source: wgpu::ShaderSource::Wgsl(include_str!("shadow_shader.wgsl").into()),
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});
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let layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
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label: Some("Shadow Pipeline Layout"),
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bind_group_layouts: &[shadow_pass_layout],
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immediate_size: 0,
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});
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device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
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label: Some("Shadow Pipeline"),
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layout: Some(&layout),
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vertex: wgpu::VertexState {
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module: &shader,
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entry_point: Some("vs_main"),
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buffers: &[MeshVertex::LAYOUT],
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compilation_options: wgpu::PipelineCompilationOptions::default(),
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},
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fragment: None,
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primitive: wgpu::PrimitiveState {
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topology: wgpu::PrimitiveTopology::TriangleList,
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strip_index_format: None,
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front_face: wgpu::FrontFace::Ccw,
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cull_mode: Some(wgpu::Face::Front),
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polygon_mode: wgpu::PolygonMode::Fill,
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unclipped_depth: false,
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conservative: false,
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},
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depth_stencil: Some(wgpu::DepthStencilState {
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format: SHADOW_FORMAT,
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depth_write_enabled: true,
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depth_compare: wgpu::CompareFunction::Less,
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stencil: wgpu::StencilState::default(),
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bias: wgpu::DepthBiasState {
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constant: 2,
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slope_scale: 2.0,
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clamp: 0.0,
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},
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}),
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multisample: wgpu::MultisampleState {
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count: 1,
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mask: !0,
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alpha_to_coverage_enabled: false,
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},
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multiview_mask: None,
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cache: None,
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})
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}
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