@luma.gl/shadertools/dist/modules/lighting/lights/lighting-wgsl.d.ts

Shader module system for luma.gl

export declare const lightingUniformsWGSL = "// #if (defined(SHADER_TYPE_FRAGMENT) && defined(LIGHTING_FRAGMENT)) || (defined(SHADER_TYPE_VERTEX) && defined(LIGHTING_VERTEX))\nconst MAX_LIGHTS: i32 = 5;\n\nstruct AmbientLight {\n  color: vec3<f32>,\n};\n\nstruct PointLight {\n  color: vec3<f32>,\n  position: vec3<f32>,\n  attenuation: vec3<f32>, // 2nd order x:Constant-y:Linear-z:Exponential\n};\n\nstruct SpotLight {\n  color: vec3<f32>,\n  position: vec3<f32>,\n  direction: vec3<f32>,\n  attenuation: vec3<f32>,\n  coneCos: vec2<f32>,\n};\n\nstruct DirectionalLight {\n  color: vec3<f32>,\n  direction: vec3<f32>,\n};\n\nstruct UniformLight {\n  color: vec3<f32>,\n  position: vec3<f32>,\n  direction: vec3<f32>,\n  attenuation: vec3<f32>,\n  coneCos: vec2<f32>,\n};\n\nstruct lightingUniforms {\n  enabled: i32,\n  directionalLightCount: i32,\n  pointLightCount: i32,\n  spotLightCount: i32,\n  ambientColor: vec3<f32>,\n  lights: array<UniformLight, 5>,\n};\n\n@group(2) @binding(auto) var<uniform> lighting : lightingUniforms;\n\nfn lighting_getPointLight(index: i32) -> PointLight {\n  let light = lighting.lights[index];\n  return PointLight(light.color, light.position, light.attenuation);\n}\n\nfn lighting_getSpotLight(index: i32) -> SpotLight {\n  let light = lighting.lights[lighting.pointLightCount + index];\n  return SpotLight(light.color, light.position, light.direction, light.attenuation, light.coneCos);\n}\n\nfn lighting_getDirectionalLight(index: i32) -> DirectionalLight {\n  let light = lighting.lights[lighting.pointLightCount + lighting.spotLightCount + index];\n  return DirectionalLight(light.color, light.direction);\n}\n\nfn getPointLightAttenuation(pointLight: PointLight, distance: f32) -> f32 {\n  return pointLight.attenuation.x\n       + pointLight.attenuation.y * distance\n       + pointLight.attenuation.z * distance * distance;\n}\n\nfn getSpotLightAttenuation(spotLight: SpotLight, positionWorldspace: vec3<f32>) -> f32 {\n  let lightDirection = normalize(positionWorldspace - spotLight.position);\n  let coneFactor = smoothstep(\n    spotLight.coneCos.y,\n    spotLight.coneCos.x,\n    dot(normalize(spotLight.direction), lightDirection)\n  );\n  let distanceAttenuation = getPointLightAttenuation(\n    PointLight(spotLight.color, spotLight.position, spotLight.attenuation),\n    distance(spotLight.position, positionWorldspace)\n  );\n  return distanceAttenuation / max(coneFactor, 0.0001);\n}\n";
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