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64 lines
1.7 KiB
64 lines
1.7 KiB
#ifndef _SAMPLING_PATHTRACINGSAMPLER_HLSL_
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#define _SAMPLING_PATHTRACINGSAMPLER_HLSL_
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#if defined(QRNG_METHOD_RANDOM_XOR_SHIFT) || defined(QRNG_METHOD_RANDOM_PCG_4D)
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#include "PseudoRandom.hlsl"
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#else
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#include "QuasiRandom.hlsl"
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#endif
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// global dimension offset (could be used to alter the noise pattern)
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#ifndef QRNG_OFFSET
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#define QRNG_OFFSET 0
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#endif
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#ifndef QRNG_SAMPLES_PER_BOUNCE
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#define QRNG_SAMPLES_PER_BOUNCE 64
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#endif
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struct PathTracingSampler
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{
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#if defined(QRNG_METHOD_SOBOL)
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QrngSobol generator;
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#elif defined(QRNG_METHOD_SOBOL_BLUE_NOISE)
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QrngSobolBlueNoise generator;
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#elif defined(QRNG_METHOD_GLOBAL_SOBOL_BLUE_NOISE)
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QrngGlobalSobolBlueNoise generator;
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#elif defined(QRNG_METHOD_KRONECKER)
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QrngKronecker generator;
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#elif defined(QRNG_METHOD_RANDOM_XOR_SHIFT)
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QrngXorShift generator;
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#elif defined(QRNG_METHOD_RANDOM_PCG_4D)
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QrngPcg4D generator;
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#endif
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int bounceIndex;
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void Init(uint2 pixelCoord, uint startPathIndex, uint perPixelPathCount = 256)
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{
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#if defined(QRNG_METHOD_GLOBAL_SOBOL_BLUE_NOISE)
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generator.Init(pixelCoord, startPathIndex, perPixelPathCount);
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#else
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generator.Init(pixelCoord, startPathIndex);
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#endif
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bounceIndex = 0;
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}
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float GetFloatSample(int dimension)
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{
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uint actualDimension = QRNG_OFFSET + QRNG_SAMPLES_PER_BOUNCE * bounceIndex + dimension;
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return generator.GetFloat(actualDimension);
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}
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void NextBounce()
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{
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bounceIndex++;
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}
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void NextPath()
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{
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generator.NextSample();
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bounceIndex = 0;
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}
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};
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#endif // _SAMPLING_PATHTRACINGSAMPLER_HLSL_
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