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Fixed error in Specular shader which gave low key specular highlights

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This commit is contained in:
Olivier Prat 2018-01-16 10:47:46 +01:00
parent c7cdf6b8f6
commit 6686b328c7
1 changed files with 2 additions and 2 deletions
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4
libraries/render-utils/src/LightingModel.slh
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@ -133,7 +133,7 @@ SurfaceData initSurfaceData(float roughness, vec3 normal, vec3 eyeDir) {
SurfaceData surface; SurfaceData surface;
surface.eyeDir = eyeDir; surface.eyeDir = eyeDir;
surface.normal = normal; surface.normal = normal;
surface.roughness = mix(0.001, 1.0, roughness); surface.roughness = mix(0.01, 1.0, roughness);
surface.roughness2 = surface.roughness * surface.roughness; surface.roughness2 = surface.roughness * surface.roughness;
surface.roughness4 = surface.roughness2 * surface.roughness2; surface.roughness4 = surface.roughness2 * surface.roughness2;
surface.ndotv = clamp(dot(normal, eyeDir), 0.0, 1.0); surface.ndotv = clamp(dot(normal, eyeDir), 0.0, 1.0);
@ -181,7 +181,7 @@ float fresnelSchlickScalar(float fresnelScalar, SurfaceData surface) {
float specularDistribution(SurfaceData surface) { float specularDistribution(SurfaceData surface) {
// See https://www.khronos.org/assets/uploads/developers/library/2017-web3d/glTF-2.0-Launch_Jun17.pdf // See https://www.khronos.org/assets/uploads/developers/library/2017-web3d/glTF-2.0-Launch_Jun17.pdf
// for details of equations, especially page 20 // for details of equations, especially page 20
float denom = (surface.ndoth*surface.ndoth * (surface.roughness2 - 1.0) + 1.0); float denom = (surface.ndoth*surface.ndoth * (surface.roughness4 - 1.0) + 1.0);
denom *= denom; denom *= denom;
// Add geometric factors G1(n,l) and G1(n,v) // Add geometric factors G1(n,l) and G1(n,v)
float smithInvG1NdotL = evalSmithInvG1(surface.roughness4, surface.ndotl); float smithInvG1NdotL = evalSmithInvG1(surface.roughness4, surface.ndotl);