More ray tracing changes

res/shaders/raytracing/ClosestHit.slang

@@ -1,14 +1,15 @@
 import Common;
-import RayTracingData;
 import VertexData;
 import MaterialParameter;
-import Scene;
 import LightEnv;
+import Scene;
+import RayTracingData;
+import MATERIAL_FILE_NAME;
 
 // simplification: all BLAS only have 1 geometry
 
 [shader("closesthit")]
-void main(inout payload Payload hitValue, in BuiltInTriangleIntersectionAttributes attr)
+void closesthit(inout float3 hitValue, in BuiltInTriangleIntersectionAttributes attr)
 {
     const float3 barycentricCoords = float3(1.0f - attr.barycentrics.x - attr.barycentrics.y, attr.barycentrics.x, attr.barycentrics.y);
 
@@ -52,5 +53,5 @@ void main(inout payload Payload hitValue, in BuiltInTriangleIntersectionAttribut
     result = result / (result + float3(1.0));
     result = pow(result, float3(1.0/2.2));
 
-    hitValue.color = result;
+    hitValue = result;
 }

res/shaders/raytracing/Miss.slang

@@ -0,0 +1,7 @@
+import RayTracingData;
+
+[shader("miss")]
+void main(inout float3 p)
+{
+    p = float3(1, 0, 1);
+}

res/shaders/raytracing/RayGen.slang

@@ -17,11 +17,9 @@ void main()
 
 	uint max_rays = 24;
 
-    uint object_type = 100;
     float4 color = float4(0, 0, 0, 0);
-    uint current_mode = 0;
     float expectedDistance = -1;
-    Payload payload;
+    float3 payload;
 
     RayDesc desc = {
         origin.xyz,
@@ -32,5 +30,5 @@ void main()
 
     TraceRay(pRayTracingParams.scene, RAY_FLAG_FORCE_OPAQUE, 0xff, 0, 0, 0, desc, payload);
 
-    pRayTracingParams.image[DispatchRaysIndex().xy] = payload.color;
+    pRayTracingParams.image[DispatchRaysIndex().xy] = float4(payload, 1.0f);
 }

res/shaders/raytracing/RayTracingData.slang

@@ -1,13 +1,7 @@
-
-struct Payload
-{
-	float3 color;
-};
-
 struct RayTracingParams
 {
 	RaytracingAccelerationStructure scene;
-	RWTexture2D<float3> image;
+	RWTexture2D<float4> image;
     StructuredBuffer<uint> indexBuffer;
 };
 ParameterBlock<RayTracingParams> pRayTracingParams;