3 * Copyright (C) 2010-2014 celeron55, Perttu Ahola <celeron55@gmail.com>
4 * Copyright (C) 2010-2014 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
7 * Redistribution and use in source and binary forms, with or without modification, are
8 * permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright notice, this list of
10 * conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
17 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
21 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
22 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include "util/string.h"
33 extern FlagDesc flagdesc_noiseparams[];
38 PseudoRandom(): m_next(0)
41 PseudoRandom(int seed): m_next(seed)
51 m_next = m_next * 1103515245 + 12345;
52 return((unsigned)(m_next/65536) % 32768);
54 int range(int min, int max)
56 if(max-min > 32768/10)
58 //dstream<<"WARNING: PseudoRandom::range: max > 32767"<<std::endl;
66 return (next()%(max-min+1))+min;
72 #define NOISE_FLAG_DEFAULTS 0x01
73 #define NOISE_FLAG_EASED 0x02
74 #define NOISE_FLAG_ABSVALUE 0x04
76 //// TODO(hmmmm): implement these!
77 #define NOISE_FLAG_POINTBUFFER 0x08
78 #define NOISE_FLAG_SIMPLEX 0x10
93 spread = v3f(250, 250, 250);
98 flags = NOISE_FLAG_DEFAULTS;
101 NoiseParams(float offset_, float scale_, v3f spread_, s32 seed_,
102 u16 octaves_, float persist_, float lacunarity_,
103 u32 flags_=NOISE_FLAG_DEFAULTS)
111 lacunarity = lacunarity_;
117 // Convenience macros for getting/setting NoiseParams in Settings as a string
118 // WARNING: Deprecated, use Settings::getNoiseParamsFromValue() instead
119 #define NOISEPARAMS_FMT_STR "f,f,v3,s32,u16,f"
120 //#define getNoiseParams(x, y) getStruct((x), NOISEPARAMS_FMT_STR, &(y), sizeof(y))
121 //#define setNoiseParams(x, y) setStruct((x), NOISEPARAMS_FMT_STR, &(y))
135 Noise(NoiseParams *np, int seed, int sx, int sy, int sz=1);
138 void setSize(int sx, int sy, int sz=1);
139 void setSpreadFactor(v3f spread);
140 void setOctaves(int octaves);
144 float step_x, float step_y,
147 float x, float y, float z,
148 float step_x, float step_y, float step_z,
151 float *perlinMap2D(float x, float y, float *persistence_map=NULL);
152 float *perlinMap3D(float x, float y, float z, float *persistence_map=NULL);
154 inline float *perlinMap2D_PO(float x, float xoff, float y, float yoff,
155 float *persistence_map=NULL)
158 x + xoff * np.spread.X,
159 y + yoff * np.spread.Y,
163 inline float *perlinMap3D_PO(float x, float xoff, float y, float yoff,
164 float z, float zoff, float *persistence_map=NULL)
167 x + xoff * np.spread.X,
168 y + yoff * np.spread.Y,
169 z + zoff * np.spread.Z,
175 void resizeNoiseBuf(bool is3d);
176 void updateResults(float g, float *gmap, float *persistence_map, size_t bufsize);
180 float NoisePerlin2D(NoiseParams *np, float x, float y, int seed);
181 float NoisePerlin3D(NoiseParams *np, float x, float y, float z, int seed);
183 inline float NoisePerlin2D_PO(NoiseParams *np, float x, float xoff,
184 float y, float yoff, int seed)
186 return NoisePerlin2D(np,
187 x + xoff * np->spread.X,
188 y + yoff * np->spread.Y,
192 inline float NoisePerlin3D_PO(NoiseParams *np, float x, float xoff,
193 float y, float yoff, float z, float zoff, int seed)
195 return NoisePerlin3D(np,
196 x + xoff * np->spread.X,
197 y + yoff * np->spread.Y,
198 z + zoff * np->spread.Z,
202 // Return value: -1 ... 1
203 float noise2d(int x, int y, int seed);
204 float noise3d(int x, int y, int z, int seed);
206 float noise2d_gradient(float x, float y, int seed, bool eased=true);
207 float noise3d_gradient(float x, float y, float z, int seed, bool eased=false);
209 float noise2d_perlin(float x, float y, int seed,
210 int octaves, float persistence, bool eased=true);
212 float noise2d_perlin_abs(float x, float y, int seed,
213 int octaves, float persistence, bool eased=true);
215 float noise3d_perlin(float x, float y, float z, int seed,
216 int octaves, float persistence, bool eased=false);
218 float noise3d_perlin_abs(float x, float y, float z, int seed,
219 int octaves, float persistence, bool eased=false);
221 inline float easeCurve(float t)
223 return t * t * t * (t * (6.f * t - 15.f) + 10.f);
226 float contour(float v);