37 lines
1.2 KiB
Plaintext
37 lines
1.2 KiB
Plaintext
import Common;
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import RayTracingData;
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[shader("raygeneration")]
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void raygen()
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{
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uint3 LaunchID = DispatchRaysIndex();
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uint3 LaunchSize = DispatchRaysDimensions();
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const float2 pixelCenter = float2(LaunchID.xy) + float2(0.5, 0.5);
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const float2 inUV = pixelCenter / float2(LaunchSize.xy);
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float2 d = float2(inUV.x, 1 - inUV.y) * 2.0 - 1.0;
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float4 target = mul(pViewParams.inverseProjection, float4(d.x, d.y, 1, 1));
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RayDesc rayDesc;
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rayDesc.Origin = mul(pViewParams.inverseViewMatrix, float4(0, 0, 0, 1)).xyz;
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rayDesc.Direction = mul(pViewParams.inverseViewMatrix, float4(normalize(target.xyz), 0)).xyz;
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rayDesc.TMin = 0.001;
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rayDesc.TMax = 10000.0;
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const uint maxRays = 12;
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float3 color = float3(0, 0, 0);
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float alpha;
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for(uint i = 0; i < maxRays; ++i) {
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RayPayload payload;
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TraceRay(pRayTracingParams.scene, RAY_FLAG_FORCE_OPAQUE, 0xff, 0, 0, 0, rayDesc, payload);
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color = color.rgb * alpha + payload.color * payload.alpha;
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alpha = alpha + payload.alpha;
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rayDesc.Origin = payload.intersection_WS;
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if(alpha > 0.9){
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break;
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}
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}
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pRayTracingParams.image[int2(LaunchID.xy)] = float4(color, alpha);
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}
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