// Filename: perlinNoise.h
// Created by:  drose (05Oct05)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) Carnegie Mellon University.  All rights reserved.
//
// All use of this software is subject to the terms of the revised BSD
// license.  You should have received a copy of this license along
// with this source code in a file named "LICENSE."
//
////////////////////////////////////////////////////////////////////

#ifndef PERLINNOISE_H
#define PERLINNOISE_H

#include "pandabase.h"
#include "pvector.h"
#include "vector_int.h"
#include "luse.h"
#include "randomizer.h"

////////////////////////////////////////////////////////////////////
//       Class : PerlinNoise
// Description : This is the base class for PerlinNoise2 and
//               PerlinNoise3, different dimensions of Perlin noise
//               implementation.  The base class just collects the
//               common functionality.
////////////////////////////////////////////////////////////////////
class EXPCL_PANDA_MATHUTIL PerlinNoise {
protected:
  PerlinNoise(int table_size, unsigned long seed);
  PerlinNoise(const PerlinNoise &copy);
  void operator = (const PerlinNoise &copy);

  INLINE static double fade(double t);
  INLINE static double lerp(double t, double a, double b);

PUBLISHED:
  INLINE unsigned long get_seed();

protected:
  int _table_size;
  int _table_size_mask;

  Randomizer _randomizer;

  typedef vector_int Index;
  Index _index;
};

#include "perlinNoise.I"

#endif
