From f570e109c4039e15526af38e17f350c115327489 Mon Sep 17 00:00:00 2001
From: Mukund Keshava <mkeshava@nvidia.com>
Date: Tue, 27 May 2025 17:46:04 +0530
Subject: Add LSS intrinsics (#7200)

* WiP: LSS intrinsics: initial commit

* format code

* Fix CI failures

* Address review comment

---------

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>
---
 tests/cuda/lss-test.slang | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 tests/cuda/lss-test.slang

(limited to 'tests/cuda')

diff --git a/tests/cuda/lss-test.slang b/tests/cuda/lss-test.slang
new file mode 100644
index 000000000..4b0512cb1
--- /dev/null
+++ b/tests/cuda/lss-test.slang
@@ -0,0 +1,34 @@
+//TEST:SIMPLE(filecheck=CHECK): -target cuda
+//CHECK_: __global__ void __closesthit__closestHitShaderLss
+//CHECK: optixGetSpherePositionAndRadius
+//CHECK: optixObjectPositionsAndRadii
+//CHECK: optixIsSphereHit
+//CHECK: optixIsLSSHit
+
+struct RayPayload
+{
+    float4 color;
+    float2x4 lssData;
+    bool isSphere;
+    bool isLss;
+};
+
+[shader("closesthit")]
+void closestHitShaderLss(inout RayPayload payload, in BuiltInTriangleIntersectionAttributes attr)
+{
+    // Test TraceRay API functions
+    payload.color = GetSpherePositionAndRadius();
+    payload.lssData = GetLssPositionsAndRadii();
+    payload.isSphere = IsSphereHit();
+    payload.isLss = IsLssHit();
+    
+// TODO: This will be enabled once issue #6647 is completed.
+#if 0
+    // Test HitObject API functions
+    HitObject hitObj;
+    float4 sphereData = hitObj.GetSphereObjectPositionAndRadius();
+    float2x4 lssData = hitObj.GetLssObjectPositionsAndRadii();
+    bool isSphereHit = hitObj.IsSphereHit();
+    bool isLssHit = hitObj.IsLssHit();
+#endif
+}
\ No newline at end of file
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