XDXR (XBOX DXR)

float XDXR_RayTCurrent();
float XDXR_RayTMin();​

// Extension -- retrieve the hit triangle vertex positions.
// Outparams are unchanged if there is no hit.
// Returns false if there is no hit.
bool XDXR_GetHitTriangleVertexPositions(
    out float3 v0,
    out float3 v1,
    out float3 v2,
    uint instanceNodePtr,
    uint leafNodePtr);

// Extension -- retrieve the committed hit triangle vertex positions.
// Use this after traversal to get the final hit triangle.
// Outparams are unchanged if there is no hit.
// Returns false if there is no hit.
bool XDXR_GetCommittedHitTriangleVertexPositions(
    out float3 v0,
    out float3 v1,
    out float3 v2);

// Extension -- retrieve the pending hit triangle vertex positions.
// Use this inside an AHS to get the candidate triangle.
// Outparams are unchanged if there is no hit.
// Returns false if there is no hit.
bool XDXR_GetPendingHitTriangleVertexPositions(
    out float3 v0,
    out float3 v1,
    out float3 v2);
​
uint XDXR_GetPendingBlasLeafNodePtr();
uint XDXR_GetPendingInstanceNodePtr();​

​uint XDXR_GetCommittedBlasLeafNodePtr();
uint XDXR_GetCommittedInstanceNodePtr();​

// Extension -- set leaf node to immediately run closest hit shader on.
// Use `rayFlags = RAY_FLAG_FORCE_OPAQUE | RAY_FLAG_FORCE_NON_OPAQUE` to force "short-circuit" traversal, immediately hitting this node.
void XDXR_SetShortCircuitIntersectNodes(uint instanceNode, uint blasLeafNodePtr);

// Example
{
    float maxT = 1E9;​

    RayDesc desc = { rayOrigin, minT, rayDir, maxT };​
    TraceRay(TLAS, flags, …, myRay, payload);​

    // No payload or Closest-Hit Shader required!​
    bool inShadow = XDXR_RayTCurrent() < 1E9;​

    // No need to fetch from your own vertex buffer.
    // Can use XDXR_GetPendingHitTriangleVertexPositions in AHS too​.
    float3 v0, v1, v2;​
    XDXR_GetCommittedHitTriangleVertexPositions(v0, v1, v2);

    // Perform shading logic.
    …
}