yggdrasil75/stupidsimcpp
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pushing this back.

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yggdrasil75
2026-03-02 21:22:40 -05:00
parent 14158fae83
commit 565646e13e
3 changed files with 287 additions and 82 deletions
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31
util/grid/grid3eigen.hpp
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@@ -1623,7 +1623,7 @@ public:
}
accumColor[pidx] = color;
sampleCount[pidx] = 0;
sampleCount[pidx] = 1;
}
}
@@ -1635,18 +1635,12 @@ public:
std::atomic<uint64_t> counter(0);
uint64_t totalPixels = static_cast<uint64_t>(width) * height;
uint64_t stride = 15485863;
auto gcd = [](uint64_t a, uint64_t b) {
while (b != 0) {
uint64_t temp = b;
b = a % b;
a = temp;
}
return a;
};
while (gcd(stride, totalPixels) != 1) {
stride += 2;
}
std::vector<uint64_t> pixelIndices(totalPixels);
std::iota(pixelIndices.begin(), pixelIndices.end(), 0);
std::random_device rd;
std::mt19937 g(rd());
std::shuffle(pixelIndices.begin(), pixelIndices.end(), g);
#pragma omp parallel
{
@@ -1669,7 +1663,7 @@ public:
for (int i = 0; i < chunkSize; ++i) {
uint64_t currentOffset = startIdx + i;
uint64_t pidx = (currentOffset * stride) % totalPixels;
uint64_t pidx = pixelIndices[currentOffset % totalPixels];
int y = pidx / width;
int x = pidx % width;
@@ -1685,13 +1679,8 @@ public:
Eigen::Vector3f pbrColor = traceRay(origin, rayDir, 0, seed, maxBounces, globalIllumination, useLod);
if (sampleCount[pidx] == 0) {
accumColor[pidx] = pbrColor;
sampleCount[pidx] = 1;
} else {
accumColor[pidx] += pbrColor;
sampleCount[pidx] += 1;
}
accumColor[pidx] += pbrColor;
sampleCount[pidx] += 1;
}
}
}