Noise.h

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#include "Geom.h"
 
#include "../system/FreestyleConfig.h"
 
#ifdef WITH_CXX_GUARDEDALLOC
#  include "MEM_guardedalloc.h"
#endif
 
using namespace std;
 
namespace Freestyle {
 
#define _NOISE_B 0x100
 
using namespace Geometry;
 
class Noise {
 public:
  Noise(long seed = -1);
 
  ~Noise() {}
 
  float turbulence1(float arg, float freq, float amp, uint oct = 4);
 
  float turbulence2(Vec2f &v, float freq, float amp, uint oct = 4);
 
  float turbulence3(Vec3f &v, float freq, float amp, uint oct = 4);
 
  float smoothNoise1(float arg);
 
  float smoothNoise2(Vec2f &vec);
 
  float smoothNoise3(Vec3f &vec);
 
 private:
  int p[_NOISE_B + _NOISE_B + 2];
  float g3[_NOISE_B + _NOISE_B + 2][3];
  float g2[_NOISE_B + _NOISE_B + 2][2];
  float g1[_NOISE_B + _NOISE_B + 2];
  /* UNUSED */
  // int start;
 
#ifdef WITH_CXX_GUARDEDALLOC
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:Noise")
#endif
};
 
} /* namespace Freestyle */