72 lines
2.0 KiB
Plaintext
72 lines
2.0 KiB
Plaintext
import MaterialParameter;
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import BRDF;
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import Common;
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interface ILightEnv
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{
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float3 illuminate<B:IBRDF>(MaterialFragmentParameter input, B brdf);
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};
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struct DirectionalLight : ILightEnv
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{
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float4 color;
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float4 direction;
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float3 illuminate<B:IBRDF>(MaterialFragmentParameter input, B brdf)
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{
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float3 lightDir_TS = input.transformWorldToTangent(normalize(direction.xyz));
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return brdf.evaluate(input.viewDir_TS, -lightDir_TS, color.xyz);
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}
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};
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struct PointLight : ILightEnv
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{
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float4 position_WS;
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float4 colorRange;
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float3 illuminate<B:IBRDF>(MaterialFragmentParameter input, B brdf)
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{
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float3 position_TS = input.transformWorldToTangent(position_WS.xyz);
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float3 lightDir_TS = position_TS - input.position_TS;
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float d = length(lightDir_TS);
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float illuminance = max(1 - d / colorRange.w, 0);
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return illuminance * brdf.evaluate(input.viewDir_TS, normalize(lightDir_TS), colorRange.xyz);
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}
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bool insidePlane(Plane plane)
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{
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return dot(plane.n, getViewPos().xyz) - plane.d < -colorRange.w;
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}
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bool insideFrustum(Frustum frustum, float zNear, float zFar)
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{
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bool result = true;
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if(getViewPos().z - colorRange.w > zNear || getViewPos().z + colorRange.w < zFar)
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{
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//result = false;
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}
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for(int i = 0; i < 4 && result; ++i)
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{
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if(insidePlane(frustum.planes[i]))
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{
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//result = false;
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}
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}
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return result;
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}
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float3 getViewPos()
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{
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return mul(gViewParams.viewMatrix, position_WS).xyz;
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}
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};
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layout(set = INDEX_LIGHT_ENV, binding = 0, std430)
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StructuredBuffer<DirectionalLight> directionalLights;
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layout(set = INDEX_LIGHT_ENV, binding = 1, std430)
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ConstantBuffer<uint> numDirectionalLights;
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layout(set = INDEX_LIGHT_ENV, binding = 2, std430)
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StructuredBuffer<PointLight> pointLights;
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layout(set = INDEX_LIGHT_ENV, binding = 3, std430)
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ConstantBuffer<uint> numPointLights;
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