Version: 2020.2
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  • C#

CommandBuffer.SetRayTracingShaderPass

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public void SetRayTracingShaderPass(Experimental.Rendering.RayTracingShader rayTracingShader, string passName);

Parameters

rayTracingShader RayTracingShader to set parameter for.
passName The Shader Pass to use when executing ray tracing shaders.

Description

Adds a command to select which Shader Pass to use when executing ray/geometry intersection shaders.

This name is specified in the ShaderLab shaders used by Materials applied to Renderers used in ray tracing. If a shader doesn't have a Shader Pass with the specified name, then no ray/geometry intersection code is executed. This method must be called before calling CommandBuffer.DispatchRays.

The Shader Pass code can include optional closesthit or anyhit shaders.

For procedural ray-traced geometries, an intersection shader must be authored. The engine code will automatically enable a keywork named RAY_TRACING_PROCEDURAL_GEOMETRY if the geometry is proceduraly ray-traced.

SubShader
{
    Pass
    {
       // SetShaderPass must use this name in order to execute the ray tracing shaders from this Pass.
        Name "Test"

Tags{ "LightMode" = "RayTracing" }

HLSLPROGRAM

#pragma multi_compile_local RAY_TRACING_PROCEDURAL_GEOMETRY

#pragma raytracing test

struct AttributeData { float2 barycentrics; };

struct RayPayload { float4 color; };

#if RAY_TRACING_PROCEDURAL_GEOMETRY [shader("intersection")] void IntersectionMain() { AttributeData attr; attr.barycentrics = float2(0, 0); ReportHit(0, 0, attr); } #endif

[shader("closesthit")] void ClosestHitMain(inout RayPayload payload : SV_RayPayload, AttributeData attribs : SV_IntersectionAttributes) { payload.color = float4(1, 0, 0, 1); }

ENDHLSL } }