More ray tracing changes

res/shaders/raytracing/RayTracingData.slang

@@ -1,7 +1,23 @@
+import MaterialParameter;
+
 struct RayTracingParams
 {
 	RaytracingAccelerationStructure scene;
 	RWTexture2D<float4> image;
     StructuredBuffer<uint> indexBuffer;
+    RWStructuredBuffer<float3> rayDirections;
+    RWStructuredBuffer<float3> origins;
 };
+layout(set=5)
 ParameterBlock<RayTracingParams> pRayTracingParams;
+
+struct CallablePayload
+{
+    FragmentParameter params;
+    float3 color;
+};
+
+struct RayPayload
+{
+    float3 color;
+};