mirror of
https://github.com/moparisthebest/minetest
synced 2024-11-15 22:05:07 -05:00
26bbe66288
--HG-- rename : src/noise.cpp.new => misc/noise.cpp rename : src/noise.h.new => misc/noise.h
109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
/*
|
|
Minetest-c55
|
|
Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
|
|
|
|
This program 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.
|
|
|
|
This program 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 this program; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifndef NOISE_HEADER
|
|
#define NOISE_HEADER
|
|
|
|
double easeCurve(double t);
|
|
|
|
// Return value: -1 ... 1
|
|
double noise2d(int x, int y, int seed);
|
|
double noise3d(int x, int y, int z, int seed);
|
|
|
|
double noise2d_gradient(double x, double y, int seed);
|
|
double noise3d_gradient(double x, double y, double z, int seed);
|
|
|
|
double noise2d_perlin(double x, double y, int seed,
|
|
int octaves, double persistence);
|
|
|
|
double noise2d_perlin_abs(double x, double y, int seed,
|
|
int octaves, double persistence);
|
|
|
|
double noise3d_perlin(double x, double y, double z, int seed,
|
|
int octaves, double persistence);
|
|
|
|
double noise3d_perlin_abs(double x, double y, double z, int seed,
|
|
int octaves, double persistence);
|
|
|
|
enum NoiseType
|
|
{
|
|
NOISE_PERLIN,
|
|
NOISE_PERLIN_ABS,
|
|
NOISE_PERLIN_CONTOUR,
|
|
NOISE_PERLIN_CONTOUR_FLIP_YZ
|
|
};
|
|
|
|
struct NoiseParams
|
|
{
|
|
NoiseType type;
|
|
int seed;
|
|
int octaves;
|
|
double persistence;
|
|
double pos_scale;
|
|
double noise_scale; // Useful for contour noises
|
|
|
|
NoiseParams(NoiseType type_=NOISE_PERLIN, int seed_=0,
|
|
int octaves_=3, double persistence_=0.5,
|
|
double pos_scale_=100.0, double noise_scale_=1.0):
|
|
type(type_),
|
|
seed(seed_),
|
|
octaves(octaves_),
|
|
persistence(persistence_),
|
|
pos_scale(pos_scale_),
|
|
noise_scale(noise_scale_)
|
|
{
|
|
}
|
|
};
|
|
|
|
double noise3d_param(const NoiseParams ¶m, double x, double y, double z);
|
|
|
|
class NoiseBuffer
|
|
{
|
|
public:
|
|
NoiseBuffer();
|
|
~NoiseBuffer();
|
|
|
|
void clear();
|
|
void create(const NoiseParams ¶m,
|
|
double first_x, double first_y, double first_z,
|
|
double last_x, double last_y, double last_z,
|
|
double samplelength_x, double samplelength_y, double samplelength_z);
|
|
void multiply(const NoiseParams ¶m);
|
|
// Deprecated
|
|
void create(int seed, int octaves, double persistence,
|
|
bool abs,
|
|
double first_x, double first_y, double first_z,
|
|
double last_x, double last_y, double last_z,
|
|
double samplelength_x, double samplelength_y, double samplelength_z);
|
|
|
|
void intSet(int x, int y, int z, double d);
|
|
void intMultiply(int x, int y, int z, double d);
|
|
double intGet(int x, int y, int z);
|
|
double get(double x, double y, double z);
|
|
|
|
private:
|
|
double *m_data;
|
|
double m_start_x, m_start_y, m_start_z;
|
|
double m_samplelength_x, m_samplelength_y, m_samplelength_z;
|
|
int m_size_x, m_size_y, m_size_z;
|
|
};
|
|
|
|
#endif
|
|
|