New example, loading glTF scenes instead of individual OBJ. Showing simple path tracing and how to make it 3x faster.

ray_tracing_gltf/shaders/raycommon.glsl

@@ -0,0 +1,9 @@
+struct hitPayload
+{
+  vec3 hitValue;
+  uint seed;
+  uint depth;
+  vec3 rayOrigin;
+  vec3 rayDirection;
+  vec3 weight;
+};