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// optix-ser.slang
//TEST:SIMPLE(filecheck=CHECK): -target cuda -entry rayGenerationMain -stage raygeneration
//TEST_INPUT: set scene = AccelerationStructure
uniform RaytracingAccelerationStructure scene;
//TEST_INPUT:set outputBuffer = out ubuffer(data=[0, 0, 0, 0], stride=4)
RWStructuredBuffer<uint> outputBuffer;
struct SomeValues
{
int a;
float b;
};
uint calcValue(HitObject hit)
{
uint r = 0;
if (hit.IsHit())
{
uint instanceIndex = hit.GetInstanceIndex();
uint instanceID = hit.GetInstanceID();
uint geometryIndex = hit.GetGeometryIndex();
uint primitiveIndex = hit.GetPrimitiveIndex();
int clusterID = hit.GetClusterID();
uint shaderTableIndex = hit.GetShaderTableIndex();
// spriv and glsl lack these methods
uint setShaderTableIndex = hit.SetShaderTableIndex(0);
uint ialbedo = hit.LoadLocalRootTableConstant(0);
SomeValues objSomeValues = hit.GetAttributes<SomeValues>();
r += instanceIndex;
r += instanceID;
r += geometryIndex;
r += primitiveIndex;
r += objSomeValues.a;
r += clusterID;
r += shaderTableIndex;
r += setShaderTableIndex;
r += ialbedo;
}
return r;
}
void rayGenerationMain()
{
int2 launchID = int2(DispatchRaysIndex().xy);
int2 launchSize = int2(DispatchRaysDimensions().xy);
int idx = launchID.x;
SomeValues someValues = { idx, idx * 2.0f };
RayDesc ray;
ray.Origin = float3(idx, 0, 0);
ray.TMin = 0.01f;
ray.Direction = float3(0, 1, 0);
ray.TMax = 1e4f;
RAY_FLAG rayFlags = RAY_FLAG_ACCEPT_FIRST_HIT_AND_END_SEARCH | RAY_FLAG_CULL_BACK_FACING_TRIANGLES;
uint instanceInclusionMask = 0xff;
uint rayContributionToHitGroupIndex = 0;
uint multiplierForGeometryContributionToHitGroupIndex = 4;
uint missShaderIndex = 0;
// SPIRV: OpHitObjectTraceRayNV
// CHECK: optixTraverse
HitObject hit = HitObject::TraceRay(scene,
rayFlags,
instanceInclusionMask,
rayContributionToHitGroupIndex,
multiplierForGeometryContributionToHitGroupIndex,
missShaderIndex,
ray,
someValues);
ReorderThread( hit );
ReorderThread(hit, uint(idx & 3), 2);
ReorderThread(uint(idx & 1), 1);
outputBuffer[idx] = calcValue(hit);
HitObject miss[2];
miss[0] = HitObject::MakeMiss(0u, ray);
miss[1] = HitObject::MakeMotionMiss(0u, ray, 1.f);
uint hitGroupRecordIndex = 0;
uint instanceIndex = 0xff;
uint geometryIndex = 0;
uint primitiveIndex = 0;
uint hitKind = 0;
BuiltInTriangleIntersectionAttributes attr = {0.01f, 0.2f};
HitObject hitObj = HitObject::MakeHit(hitGroupRecordIndex, scene,
instanceIndex,
geometryIndex,
primitiveIndex,
hitKind,
ray,
attr);
HitObject nopObj = HitObject::MakeNop();
outputBuffer[idx] = uint(nopObj.IsNop());
outputBuffer[idx] += calcValue(hit);
outputBuffer[idx] += calcValue(miss[0]);
outputBuffer[idx] += calcValue(miss[1]);
outputBuffer[idx] += calcValue(hitObj);
outputBuffer[idx] += calcValue(nopObj);
// Change the payload
SomeValues otherValues = { idx * -2, idx * 8.0f };
HitObject::Invoke( scene, hit, otherValues );
HitObject motionHitObj[2];
motionHitObj[0] = HitObject::MakeMotionHit(
scene,
instanceIndex,
geometryIndex,
primitiveIndex,
hitKind,
rayContributionToHitGroupIndex,
multiplierForGeometryContributionToHitGroupIndex,
ray,
0.f,
attr);
motionHitObj[1] = HitObject::MakeMotionHit(
hitGroupRecordIndex,
scene,
instanceIndex,
geometryIndex,
primitiveIndex,
hitKind,
ray,
0.f,
attr);
outputBuffer[idx] += calcValue(motionHitObj[0]);
outputBuffer[idx] += calcValue(motionHitObj[1]);
RayDesc rayD = hit.GetRayDesc();
outputBuffer[idx] += uint(rayD.TMin > 0);
outputBuffer[idx] += uint(rayD.TMax < ray.TMin);
}
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