Add support for rayQueryGetIntersectionTriangleVertexPositionsEXT (#3463)

Add a member function to RayQuery<RAY_FLAG> class
GetIntersectionTriangleVertexPositions to support the GLSL built-int
rayQueryGetIntersectionTriangleVertexPositionsEXT.

Also add new test file under tests/vkray/rayquery-closesthit.slang
to test this functionality.

1 files changed, 36 insertions, 0 deletions

diff --git a/source/slang/hlsl.meta.slang b/source/slang/hlsl.meta.slang
index 3635069e7..44d5fbe83 100644
--- a/source/slang/hlsl.meta.slang
+++ b/source/slang/hlsl.meta.slang
@@ -10208,6 +10208,42 @@ ${{{{
         auto ccTF = candidateOrCommitted == 0 ? "false" : "true";
 }}}}
 
+    __glsl_extension(GL_EXT_ray_query)
+    __glsl_extension(GL_EXT_ray_tracing_position_fetch)
+    __glsl_version(460)
+    [__NoSideEffect]
+    void __glslGetIntersectionTriangleVertexPositions$(ccName)(out float3 arr[3])
+    {
+        __intrinsic_asm "rayQueryGetIntersectionTriangleVertexPositionsEXT($0, $(ccTF), $1)";
+    };
+
+    __glsl_extension(GL_EXT_ray_query)
+    __glsl_extension(GL_EXT_ray_tracing_position_fetch)
+    __glsl_version(460)
+    [__NoSideEffect]
+    float3[3] $(ccName)GetIntersectionTriangleVertexPositions()
+    {
+        typedef float3[3] float3Arr3;
+        __target_switch
+        {
+        case glsl:
+            float3 output[3];
+            __glslGetIntersectionTriangleVertexPositions$(ccName)(output);
+            return output;
+        case spirv:
+            uint iCandidateOrCommitted = $(candidateOrCommitted);
+            return spirv_asm
+            {
+                OpCapability RayQueryKHR;
+                OpCapability RayTracingPositionFetchKHR;
+                OpCapability RayQueryPositionFetchKHR;
+                OpExtension "SPV_KHR_ray_query";
+                OpExtension "SPV_KHR_ray_tracing_position_fetch";
+                result: $$float3Arr3 = OpRayQueryGetIntersectionTriangleVertexPositionsKHR &this $iCandidateOrCommitted;
+            };
+        }
+    };
+
     // CandidateObjectToWorld3x4, CandidateWorldToObject4x3
     // CommittedObjectToWorld3x4, CommittedObjectToWorld4x3
     ${{{{