3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 double easeCurve(double t);
25 // Return value: -1 ... 1
26 double noise2d(int x, int y, int seed);
27 double noise3d(int x, int y, int z, int seed);
29 double noise2d_gradient(double x, double y, int seed);
30 double noise3d_gradient(double x, double y, double z, int seed);
32 double noise2d_perlin(double x, double y, int seed,
33 int octaves, double persistence);
35 double noise2d_perlin_abs(double x, double y, int seed,
36 int octaves, double persistence);
38 double noise3d_perlin(double x, double y, double z, int seed,
39 int octaves, double persistence);
41 double noise3d_perlin_abs(double x, double y, double z, int seed,
42 int octaves, double persistence);