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94 lines
3.8 KiB
94 lines
3.8 KiB
#include "Packages/com.unity.render-pipelines.core/ShaderLibrary\CommonMaterial.hlsl"
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#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/Raytracing/Shaders/RaytracingFragInputs.hlsl"
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// Generic function that handles the reflection code
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[shader("closesthit")]
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void ClosestHitVisibility(inout RayIntersectionVisibility rayIntersection : SV_RayPayload, AttributeData attributeData : SV_IntersectionAttributes)
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{
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UNITY_XR_ASSIGN_VIEW_INDEX(DispatchRaysIndex().z);
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IntersectionVertex currentVertex;
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FragInputs fragInput;
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uint currentFrameIndex = GetCurrentVertexAndBuildFragInputs(attributeData, currentVertex, fragInput);
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// Compute the distance of the ray
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rayIntersection.t = RayTCurrent();
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// Compute the velocity of the itnersection
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#ifdef HAVE_VFX_MODIFICATION
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uint index, instanceIndex, instanceActiveIndex;
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GetVFXInstancingIndices(index, instanceIndex, instanceActiveIndex);
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float3 inputVertexPosition = 0.0;
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rayIntersection.velocity = GetVFXVertexDisplacement(index, fragInput.positionRWS, inputVertexPosition, currentFrameIndex);
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#else
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float3 positionOS = ObjectRayOrigin() + ObjectRayDirection() * rayIntersection.t;
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float3 previousPositionWS = TransformPreviousObjectToWorld(positionOS);
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rayIntersection.velocity = saturate(length(previousPositionWS - fragInput.positionRWS));
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#endif
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}
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// Generic function that handles the reflection code
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[shader("anyhit")]
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void AnyHitVisibility(inout RayIntersectionVisibility rayIntersection : SV_RayPayload, AttributeData attributeData : SV_IntersectionAttributes)
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{
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UNITY_XR_ASSIGN_VIEW_INDEX(DispatchRaysIndex().z);
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IntersectionVertex currentVertex;
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FragInputs fragInput;
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uint currentFrameIndex = GetCurrentVertexAndBuildFragInputs(attributeData, currentVertex, fragInput);
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// Compute the view vector
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float3 viewWS = -WorldRayDirection();
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// Compute the distance of the ray
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rayIntersection.t = RayTCurrent();
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PositionInputs posInput;
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posInput.positionWS = fragInput.positionRWS;
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posInput.positionSS = rayIntersection.pixelCoord;
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// Build the surfacedata and builtindata
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SurfaceData surfaceData;
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BuiltinData builtinData;
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bool isVisible;
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GetSurfaceAndBuiltinData(fragInput, viewWS, posInput, surfaceData, builtinData, currentVertex, rayIntersection.cone, isVisible);
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// If this point is not visible, ignore the hit and force end the shader
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if (!isVisible)
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{
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IgnoreHit();
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return;
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}
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#if defined(TRANSPARENT_COLOR_SHADOW) && defined(_SURFACE_TYPE_TRANSPARENT)
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// Compute the velocity of the itnersection
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#ifdef HAVE_VFX_MODIFICATION
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uint index, instanceIndex, instanceActiveIndex;
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GetVFXInstancingIndices(index, instanceIndex, instanceActiveIndex);
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float3 inputVertexPosition = 0.0;
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rayIntersection.velocity = GetVFXVertexDisplacement(index, posInput.positionWS, inputVertexPosition, currentFrameIndex);
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#else
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float3 positionOS = ObjectRayOrigin() + ObjectRayDirection() * rayIntersection.t;
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float3 previousPositionWS = TransformPreviousObjectToWorld(positionOS);
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rayIntersection.velocity = saturate(length(previousPositionWS - fragInput.positionRWS));
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#endif
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// Adjust the color based on the transmittance or opacity
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#if HAS_REFRACTION
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rayIntersection.color *= lerp(surfaceData.transmittanceColor, float3(0.0, 0.0, 0.0), 1.0 - surfaceData.transmittanceMask);
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#else
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rayIntersection.color *= (1.0 - builtinData.opacity);
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#endif
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// Ignore to move to the following intersections
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IgnoreHit();
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#else
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else
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{
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// If this fella is opaque, then we need to stop
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rayIntersection.color = float3(0.0, 0.0, 0.0);
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AcceptHitAndEndSearch();
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}
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#endif
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}
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