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need more noise features

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Yggdrasil75
2025-11-07 14:27:40 -05:00
parent 90a34cd433
commit 18b03fbdac
7 changed files with 521 additions and 50 deletions
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74
util/noise2.hpp
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@@ -34,40 +34,6 @@ public:
PRECOMPUTED
};
private:
std::mt19937 rng;
std::uniform_real_distribution<float> dist;
// Precomputed gradient directions for 8 directions
static constexpr std::array<Grad, 8> grads = {
Grad{1.0f, 0.0f},
Grad{0.707f, 0.707f},
Grad{0.0f, 1.0f},
Grad{-0.707f, 0.707f},
Grad{-1.0f, 0.0f},
Grad{-0.707f, -0.707f},
Grad{0.0f, -1.0f},
Grad{0.707f, -0.707f}
};
NoiseType currentType;
GradientType gradType;
uint32_t currentSeed;
// Permutation table for Simplex noise
std::array<int, 512> perm;
// For Worley noise
std::vector<Vec2> featurePoints;
// For Gabor noise
float gaborFrequency;
float gaborBandwidth;
// For wavelet noise
std::vector<float> waveletCoefficients;
public:
Noise2(uint32_t seed = 0, NoiseType type = PERLIN, GradientType gradType = PRECOMPUTED) :
rng(seed), dist(0.0f, 1.0f), currentType(type), gradType(gradType),
currentSeed(seed), gaborFrequency(4.0f), gaborBandwidth(0.5f)
@@ -384,12 +350,8 @@ public:
}
// Generate terrain-like noise (useful for heightmaps)
Grid2 generateTerrainNoise(int width, int height,
float scale = 1.0f,
int octaves = 4,
float persistence = 0.5f,
uint32_t seed = 0,
const Vec2& offset = Vec2(0, 0)) {
Grid2 generateTerrainNoise(int width, int height, float scale = 1.0f, int octaves = 4,
float persistence = 0.5f, uint32_t seed = 0, const Vec2& offset = Vec2(0, 0)) {
if (seed != 0) setSeed(seed);
Grid2 grid(width * height);
@@ -453,6 +415,38 @@ public:
}
private:
std::mt19937 rng;
std::uniform_real_distribution<float> dist;
// Precomputed gradient directions for 8 directions
static constexpr std::array<Grad, 8> grads = {
Grad{1.0f, 0.0f},
Grad{0.707f, 0.707f},
Grad{0.0f, 1.0f},
Grad{-0.707f, 0.707f},
Grad{-1.0f, 0.0f},
Grad{-0.707f, -0.707f},
Grad{0.0f, -1.0f},
Grad{0.707f, -0.707f}
};
NoiseType currentType;
GradientType gradType;
uint32_t currentSeed;
// Permutation table for Simplex noise
std::array<int, 512> perm;
// For Worley noise
std::vector<Vec2> featurePoints;
// For Gabor noise
float gaborFrequency;
float gaborBandwidth;
// For wavelet noise
std::vector<float> waveletCoefficients;
// Initialize permutation table for Simplex noise
void initializePermutationTable(uint32_t seed) {
std::mt19937 localRng(seed);