introducing PBR shading

libraries/render-utils/src/DeferredGlobalLight.slh

@@ -79,12 +79,18 @@ vec3 evalAmbienSphereGlobalColor(float shadowAttenuation, vec3 position, vec3 no
     vec4 fragEyeVector = invViewMat * vec4(-position, 0.0);
     vec3 fragEyeDir = normalize(fragEyeVector.xyz);
 
-    vec3 color = diffuse.rgb * 0.5 * evalSphericalLight(ambientSphere, fragNormal).xyz;
+    vec3 ambientNormal = normal;
+
+    vec3 color = diffuse.rgb * 0.5 * evalSphericalLight(ambientSphere, ambientNormal).xyz;
 
     vec4 shading = evalFragShading(fragNormal, -getLightDirection(light), fragEyeDir, specular, gloss);
 
     color += vec3(diffuse + shading.rgb) * shading.w * shadowAttenuation * getLightColor(light) * getLightIntensity(light);
 
+    if (gl_FragCoord.x > 1000) {
+        return vec3(shading.rgb);
+    }
+
     return color;
 }
 

libraries/render-utils/src/DeferredLighting.slh

@@ -21,8 +21,15 @@ vec4 evalFragShading(vec3 fragNormal, vec3 fragLightDir, vec3 fragEyeDir, vec3 s
     // Specular Lighting depends on the half vector and the gloss
     vec3 halfDir = normalize(fragEyeDir + fragLightDir);
 
-    float specularPower = facingLight * max(0.0, dot(fragEyeDir, halfDir));
-    vec3 reflect = pow(specularPower, gloss * 128.0) * specular;
+    float specularPower = pow(facingLight * max(0.0, dot(halfDir, fragNormal)), gloss * 128.0);
+    specularPower *= (gloss * 128.0 * 0.125 + 0.25);
+
+    float shlickPower = (1.0 - dot(fragLightDir,halfDir));
+    float shlickPower2 = shlickPower * shlickPower;
+    float shlickPower5 = shlickPower2 * shlickPower2 * shlickPower;
+   // vec3 schlick = specular * (1.0 - shlickPower5) + vec3(shlickPower5);
+    vec3 schlick = vec3(0.21) * (1.0 - shlickPower5) + vec3(shlickPower5);
+    vec3 reflect = specularPower * schlick;
 
     return vec4(reflect, diffuse);
 }

libraries/render-utils/src/DeferredLightingEffect.cpp

@@ -425,7 +425,7 @@ void DeferredLightingEffect::render() {
     glBindTexture(GL_TEXTURE_2D, 0);
     
     freeFBO->release();
- //   glDisable(GL_FRAMEBUFFER_SRGB);
+  //  glDisable(GL_FRAMEBUFFER_SRGB);
     
     glDisable(GL_CULL_FACE);