New version of the samples and tutorials based on KHR_ray_tracing

ray_tracing__advance/shaders/raytrace.rahit

@@ -0,0 +1,35 @@
+#version 460
+#extension GL_EXT_ray_tracing : require
+#extension GL_EXT_nonuniform_qualifier : enable
+#extension GL_EXT_scalar_block_layout : enable
+#extension GL_GOOGLE_include_directive : enable
+
+#include "random.glsl"
+#include "raycommon.glsl"
+#include "wavefront.glsl"
+
+// clang-format off
+layout(location = 0) rayPayloadInEXT hitPayload prd;
+
+layout(binding = 2, set = 1, scalar) buffer ScnDesc { sceneDesc i[]; } scnDesc;
+layout(binding = 4, set = 1)  buffer MatIndexColorBuffer { int i[]; } matIndex[];
+layout(binding = 1, set = 1, scalar) buffer MatColorBufferObject { WaveFrontMaterial m[]; } materials[];
+// clang-format on
+
+void main()
+{
+  // Object of this instance
+  uint objId = scnDesc.i[gl_InstanceID].objId;
+
+  // Material of the object
+  int               matIdx = matIndex[objId].i[gl_PrimitiveID];
+  WaveFrontMaterial mat    = materials[objId].m[matIdx];
+
+  if(mat.illum != 4)
+    return;
+
+  if(mat.dissolve == 0.0)
+    ignoreIntersectionEXT();
+  else if(rnd(prd.seed) > mat.dissolve)
+    ignoreIntersectionEXT();
+}