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WGSL Editor

A simple online editor for the WebGPU Shading Language (WGSL).

untitled.wgsl — WGSL Editor

// A fragment shader which lights textured geometry with point lights.

// Lights from a storage buffer binding.
struct PointLight {
  position : vec3f,
  color : vec3f,
}

struct LightStorage {
  pointCount : u32,
  point : array<PointLight>,
}
@group(0) @binding(0) var<storage> lights : LightStorage;

// Texture and sampler.
@group(1) @binding(0) var baseColorSampler : sampler;
@group(1) @binding(1) var baseColorTexture : texture_2d<f32>;

// Function arguments are values from the vertex shader.
@fragment
fn fragmentMain(@location(0) worldPos : vec3f,
                @location(1) normal : vec3f,
                @location(2) uv : vec2f) -> @location(0) vec4f {
  // Sample the base color of the surface from a texture.
  let baseColor = textureSample(baseColorTexture, baseColorSampler, uv);

  let N = normalize(normal);
  var surfaceColor = vec3f(0);

  // Loop over the scene point lights.
  for (var i = 0u; i < lights.pointCount; i++) {
    let worldToLight = lights.point[i].position - worldPos;
    let dist = length(worldToLight);
    let dir = normalize(worldToLight);

    // Determine the contribution of this light to the surface color.
    let radiance = lights.point[i].color * (1 / pow(dist, 2));
    let nDotL = max(dot(N, dir), 0);

    // Accumulate light contribution to the surface color.
    surfaceColor += baseColor.rgb * radiance * nDotL;
  }

  // Return the accumulated surface color.
  return vec4(surfaceColor, baseColor.a);
}1
// A fragment shader which lights textured geometry with point lights.
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// Lights from a storage buffer binding.
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struct PointLight {
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  position : vec3f,
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  color : vec3f,
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}
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struct LightStorage {
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  pointCount : u32,
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  point : array<PointLight>,
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}
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@group(0) @binding(0) var<storage> lights : LightStorage;
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// Texture and sampler.
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@group(1) @binding(0) var baseColorSampler : sampler;
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@group(1) @binding(1) var baseColorTexture : texture_2d<f32>;
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// Function arguments are values from the vertex shader.
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@fragment
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fn fragmentMain(@location(0) worldPos : vec3f,
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                @location(1) normal : vec3f,
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                @location(2) uv : vec2f) -> @location(0) vec4f {
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  // Sample the base color of the surface from a texture.
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  let baseColor = textureSample(baseColorTexture, baseColorSampler, uv);
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  let N = normalize(normal);
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  var surfaceColor = vec3f(0);
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  // Loop over the scene point lights.
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  for (var i = 0u; i < lights.pointCount; i++) {
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    let worldToLight = lights.point[i].position - worldPos;
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    let dist = length(worldToLight);
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    let dir = normalize(worldToLight);
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    // Determine the contribution of this light to the surface color.
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    let radiance = lights.point[i].color * (1 / pow(dist, 2));
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    let nDotL = max(dot(N, dir), 0);
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    // Accumulate light contribution to the surface color.
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    surfaceColor += baseColor.rgb * radiance * nDotL;
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  }
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  // Return the accumulated surface color.
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  return vec4(surfaceColor, baseColor.a);
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}