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Added two if statements to clap the value returned by stb_perlin_fbm_noise3 to between -1.0f and 1.0f. Not sure why this was required but it fixed the issue with random spikes.

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dane_madsen 2023-05-21 12:48:54 +10:00
parent f31df7521a
commit 36bf4372b8
1 changed files with 5 additions and 1 deletions
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6
src/rtextures.c
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@ -846,10 +846,14 @@ Image GenImagePerlinNoise(int width, int height, int offsetX, int offsetY, float
// octaves = 6 -- number of "octaves" of noise3() to sum // octaves = 6 -- number of "octaves" of noise3() to sum
float p = stb_perlin_fbm_noise3(nx, ny, 1.0f, 2.0f, 0.5f, 6); float p = stb_perlin_fbm_noise3(nx, ny, 1.0f, 2.0f, 0.5f, 6);
// Clamp between -1.0f and 1.0f
if(p < -1.0f) p = -1.0f;
if(p > 1.0f) p = 1.0f;
// We need to normalize the data from [-1..1] to [0..1] // We need to normalize the data from [-1..1] to [0..1]
float np = (p + 1.0f)/2.0f; float np = (p + 1.0f)/2.0f;
int intensity = (int)(np*255.0f); int intensity = (int)(np*255.0);
pixels[y*width + x] = (Color){ intensity, intensity, intensity, 255 }; pixels[y*width + x] = (Color){ intensity, intensity, intensity, 255 };
} }
} }