forked from 0ad/0ad
67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
/* Copyright (C) 2009 Wildfire Games.
|
|
* This file is part of 0 A.D.
|
|
*
|
|
* 0 A.D. is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 0 A.D. is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/*
|
|
* 2D and 3D seamless Perlin noise
|
|
*/
|
|
|
|
// Based on http://www.cs.cmu.edu/~mzucker/code/perlin-noise-math-faq.html
|
|
// and http://mrl.nyu.edu/~perlin/paper445.pdf.
|
|
// Not optimized for speed yet.
|
|
|
|
#ifndef INCLUDED_NOISE
|
|
#define INCLUDED_NOISE
|
|
|
|
#include "Vector2D.h"
|
|
#include "Vector3D.h"
|
|
#include "MathUtil.h"
|
|
|
|
class Noise2D
|
|
{
|
|
/// Frequency in X and Y
|
|
int freq;
|
|
|
|
/// freq*freq random gradient vectors in the unit cube
|
|
CVector2D_Maths** grads;
|
|
public:
|
|
Noise2D(int freq);
|
|
~Noise2D();
|
|
|
|
/// Evaluate the noise function at a given point
|
|
float operator() (float x, float y);
|
|
};
|
|
|
|
class Noise3D
|
|
{
|
|
/// Frequency in X and Y
|
|
int freq;
|
|
|
|
/// Frequency in Z (vertical frequency)
|
|
int vfreq;
|
|
|
|
/// freq*freq*vfreq random gradient vectors in the unit cube
|
|
CVector3D*** grads;
|
|
public:
|
|
Noise3D(int freq, int vfreq);
|
|
~Noise3D();
|
|
|
|
/// Evaluate the noise function at a given point
|
|
float operator() (float x, float y, float z);
|
|
};
|
|
|
|
#endif
|