77 lines
1.7 KiB
WebGPU Shading Language
77 lines
1.7 KiB
WebGPU Shading Language
struct CameraUniform {
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vp: mat4x4<f32>;
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};
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struct MeshInstance {
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transform: mat4x4<f32>;
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};
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struct MeshData {
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instances: array<MeshInstance>;
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};
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struct PointLight {
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center: vec4<f32>;
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intensity: vec4<f32>;
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};
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struct PointLightData {
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num: i32;
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lights: array<PointLight>;
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};
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struct VertexInput {
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[[location(0)]] position: vec3<f32>;
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[[location(1)]] tex_coords: vec2<f32>;
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};
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struct VertexOutput {
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[[builtin(position)]] clip_position: vec4<f32>;
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[[location(0)]] position: vec3<f32>;
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[[location(1)]] tex_coords: vec2<f32>;
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};
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[[group(0), binding(0)]]
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var<uniform> camera: CameraUniform;
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[[group(0), binding(1)]]
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var<storage,read> point_lights: PointLightData;
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[[group(1), binding(0)]]
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var<storage,read> meshes: MeshData;
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[[group(2), binding(0)]] var t_albedo: texture_2d<f32>;
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[[group(2), binding(1)]] var s_albedo: sampler;
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[[stage(vertex)]]
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fn vs_main(
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[[builtin(instance_index)]] mesh_idx: u32,
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vertex: VertexInput,
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) -> VertexOutput {
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let transform = meshes.instances[mesh_idx].transform;
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let world_pos = transform * vec4<f32>(vertex.position, 1.0);
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var out: VertexOutput;
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out.clip_position = camera.vp * world_pos;
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out.position = world_pos.xyz;
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out.tex_coords = vertex.tex_coords;
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return out;
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}
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[[stage(fragment)]]
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fn fs_main(
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frag: VertexOutput,
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) -> [[location(0)]] vec4<f32> {
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let albedo = textureSample(t_albedo, s_albedo, frag.tex_coords).rgb;
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var lum = vec3<f32>(0.0);
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for(var i = 0; i < 4; i = i + 1) {
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let light = point_lights.lights[i];
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let light_relative = frag.position - light.center.xyz;
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let diffuse = albedo / dot(light_relative, light_relative);
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lum = lum + (diffuse * light.intensity.rgb);
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}
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return vec4<f32>(lum, 1.0);
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}
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