New version of the samples and tutorials based on KHR_ray_tracing

ray_tracing__advance/shaders/raycommon.glsl

@@ -0,0 +1,42 @@
+struct hitPayload
+{
+  vec3 hitValue;
+  uint seed;
+  int  depth;
+  vec3 attenuation;
+  int  done;
+  vec3 rayOrigin;
+  vec3 rayDir;
+};
+
+
+struct rayLight
+{
+  vec3  inHitPosition;
+  float outLightDistance;
+  vec3  outLightDir;
+  float outIntensity;
+};
+
+struct Implicit
+{
+  vec3 minimum;
+  vec3 maximum;
+  int  objType;
+  int  matId;
+};
+
+struct Sphere
+{
+  vec3  center;
+  float radius;
+};
+
+struct Aabb
+{
+  vec3 minimum;
+  vec3 maximum;
+};
+
+#define KIND_SPHERE 0
+#define KIND_CUBE 1