Merge pull request #468 from keveleigh/ShaderFix

HoloToolkitCommon fix

Author: Stephen Hodgson

Assets/HoloToolkit/Utilities/Shaders/HoloToolkitCommon.cginc

@@ -10,4 +10,19 @@ float ComputeNearPlaneFadeLinear(float4 vertex)
     return saturate(mad(distToCamera, _NearPlaneFadeDistance.y, _NearPlaneFadeDistance.x));
 }
 
+inline float3 HoloTKLightingLambertian(float3 normal, float3 lightDir, float3 lightCol)
+{
+    float diff = max(0, dot(normal, lightDir));
+    return lightCol * diff;
+}
+
+inline float3 HoloTKLightingBlinnPhong(float3 normal, float3 lightDir, float lightCol, float3 viewDir, float specularAmount, float glossAmount, float3 specularColor)
+{
+    float3 h = normalize(lightDir + viewDir);
+    float nh = max(0, dot(normal, h));
+    float spec = pow(nh, specularAmount*128.0) * glossAmount;
+
+    return lightCol * specularColor * spec;
+}
+
 #endif //HOLOTOOLKIT_COMMON