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41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
#ifndef NOISE_H
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#define NOISE_H
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#include <ScopMaths.h>
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#include <Chunk.h>
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#include <array>
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#include <random>
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#define NOISE_SIZE 512
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class Noise
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{
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public:
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Noise(const std::uint32_t seed = 42, float frequency = 0.05f, float amplitude = 0.9f, int octaves = 4, float lacunarity = 2.0f, float persistance = 0.5f);
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[[nodiscard]] std::array<std::uint32_t, CHUNK_SIZE.y> GetHeight(Scop::Vec2i pos);
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const float perlin2D(float x, float y);
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const int perlin2D(int x, int y);
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const int perlin2D2(float x, float y);
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const int perlin3D(int x, int y, int z);
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const float perlin3D(float x, float y, float z);
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const int perlin3D2(float x, float y, float z);
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~Noise() = default;
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private:
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std::mt19937 seed;
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std::array<int, NOISE_SIZE> perms;
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const float frequency;
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const float amplitude;
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const int octaves;
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const float lacunarity;
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const float persistance;
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void InitPermutation(void);
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[[nodiscard]] const float fade(float t);
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[[nodiscard]] const float lerp(float a, float b, float t);
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[[nodiscard]] const float grad2D(int hash, float x, float y);
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[[nodiscard]] const float grad(int hash, float x, float y, float z);
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};
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#endif
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