Completed Metal implementation

res/shaders/ClosestHit.slang

@@ -29,9 +29,9 @@ void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttribu
 
     float3 normalLight = dot(vert.normal, WorldRayDirection()) < 0 ? vert.normal : -vert.normal;
 
-    MaterialParameter mat; // TOOD:
-    
-    hitValue.depth++;
+    MaterialParameter mat = pParams.materialData[m.materialIndex];
+    float3 emissive = mat.emissive_type.xyz;
+
     float3 localAccRad = float3(0);
     float3 rnd = rand01(uint3(vertexIndex0, vertexIndex1, vertexIndex2));
     //float kt = ka + ks;
@@ -103,7 +103,7 @@ void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttribu
             localAccRad += mat.shade(vert.normal, -WorldRayDirection(), normalize(l), pParams.pointLights[i].color);
         }
     }
-    hitValue.light += localAccRad;
+    hitValue.light += localAccRad + emissive;
     // Indirect Illumination: cosine-weighted importance sampling
     if(hitValue.depth < 12) {
     	float r1 = 2 * PI * rnd.x, r2 = rnd.y, r2s = sqrt(r2);