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Fix index clamping bug in MarbleTexture #341

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Fix index clamping bug in MarbleTexture #341

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4 changes: 2 additions & 2 deletions src/textures/marble.h
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Original file line number Diff line number Diff line change
Expand Up @@ -71,8 +71,8 @@ class MarbleTexture : public Texture<Spectrum> {
{.58f, .58f, .6f}, {.2f, .2f, .33f}, {.58f, .58f, .6f},
};
#define NC sizeof(c) / sizeof(c[0])
#define NSEG (NC - 3)
int first = std::min(1, int(std::floor(t * NSEG)));
#define NSEG int(NC - 3)
int first = std::min(NSEG - 1, int(std::floor(t * NSEG)));
t = (t * NSEG - first);
Spectrum c0 = Spectrum::FromRGB(c[first]);
Spectrum c1 = Spectrum::FromRGB(c[first + 1]);
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