1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*
* Minetest
* Copyright (C) 2010-2014 celeron55, Perttu Ahola <celeron55@gmail.com>
* Copyright (C) 2010-2014 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef NOISE_HEADER
#define NOISE_HEADER
#include "debug.h"
#include "irr_v3d.h"
class PseudoRandom
{
public:
PseudoRandom(): m_next(0)
{
}
PseudoRandom(int seed): m_next(seed)
{
}
void seed(int seed)
{
m_next = seed;
}
// Returns 0...32767
int next()
{
m_next = m_next * 1103515245 + 12345;
return((unsigned)(m_next/65536) % 32768);
}
int range(int min, int max)
{
if(max-min > 32768/10)
{
//dstream<<"WARNING: PseudoRandom::range: max > 32767"<<std::endl;
assert(0);
}
if(min > max)
{
assert(0);
return max;
}
return (next()%(max-min+1))+min;
}
private:
int m_next;
};
struct NoiseParams {
float offset;
float scale;
v3f spread;
s32 seed;
u16 octaves;
float persist;
bool eased;
NoiseParams() {}
NoiseParams(float offset_, float scale_, v3f spread_,
int seed_, int octaves_, float persist_, bool eased_=false)
{
offset = offset_;
scale = scale_;
spread = spread_;
seed = seed_;
octaves = octaves_;
persist = persist_;
eased = eased_;
}
};
// Convenience macros for getting/setting NoiseParams in Settings as a string
// WARNING: Deprecated, use Settings::getNoiseParamsFromValue() instead
#define NOISEPARAMS_FMT_STR "f,f,v3,s32,u16,f"
//#define getNoiseParams(x, y) getStruct((x), NOISEPARAMS_FMT_STR, &(y), sizeof(y))
//#define setNoiseParams(x, y) setStruct((x), NOISEPARAMS_FMT_STR, &(y))
class Noise {
public:
NoiseParams *np;
int seed;
int sx;
int sy;
int sz;
float *noisebuf;
float *buf;
float *result;
Noise(NoiseParams *np, int seed, int sx, int sy, int sz=1);
~Noise();
void setSize(int sx, int sy, int sz=1);
void setSpreadFactor(v3f spread);
void setOctaves(int octaves);
void resizeNoiseBuf(bool is3d);
void gradientMap2D(
float x, float y,
float step_x, float step_y,
int seed);
void gradientMap3D(
float x, float y, float z,
float step_x, float step_y, float step_z,
int seed, bool eased=false);
float *perlinMap2D(float x, float y);
float *perlinMap2DModulated(float x, float y, float *persist_map);
float *perlinMap3D(float x, float y, float z, bool eased=false);
void transformNoiseMap();
};
// Return value: -1 ... 1
float noise2d(int x, int y, int seed);
float noise3d(int x, int y, int z, int seed);
float noise2d_gradient(float x, float y, int seed);
float noise3d_gradient(float x, float y, float z, int seed, bool eased=false);
float noise2d_perlin(float x, float y, int seed,
int octaves, float persistence);
float noise2d_perlin_abs(float x, float y, int seed,
int octaves, float persistence);
float noise3d_perlin(float x, float y, float z, int seed,
int octaves, float persistence, bool eased=false);
float noise3d_perlin_abs(float x, float y, float z, int seed,
int octaves, float persistence, bool eased=false);
inline float easeCurve(float t) {
return t * t * t * (t * (6.f * t - 15.f) + 10.f);
}
float contour(float v);
#define NoisePerlin2D(np, x, y, s) \
((np)->offset + (np)->scale * noise2d_perlin( \
(float)(x) / (np)->spread.X, \
(float)(y) / (np)->spread.Y, \
(s) + (np)->seed, (np)->octaves, (np)->persist))
#define NoisePerlin2DNoTxfm(np, x, y, s) \
(noise2d_perlin( \
(float)(x) / (np)->spread.X, \
(float)(y) / (np)->spread.Y, \
(s) + (np)->seed, (np)->octaves, (np)->persist))
#define NoisePerlin2DPosOffset(np, x, xoff, y, yoff, s) \
((np)->offset + (np)->scale * noise2d_perlin( \
(float)(xoff) + (float)(x) / (np)->spread.X, \
(float)(yoff) + (float)(y) / (np)->spread.Y, \
(s) + (np)->seed, (np)->octaves, (np)->persist))
#define NoisePerlin2DNoTxfmPosOffset(np, x, xoff, y, yoff, s) \
(noise2d_perlin( \
(float)(xoff) + (float)(x) / (np)->spread.X, \
(float)(yoff) + (float)(y) / (np)->spread.Y, \
(s) + (np)->seed, (np)->octaves, (np)->persist))
#define NoisePerlin3D(np, x, y, z, s) ((np)->offset + (np)->scale * \
noise3d_perlin((float)(x) / (np)->spread.X, (float)(y) / (np)->spread.Y, \
(float)(z) / (np)->spread.Z, (s) + (np)->seed, (np)->octaves, (np)->persist))
#define NoisePerlin3DEased(np, x, y, z, s) ((np)->offset + (np)->scale * \
noise3d_perlin((float)(x) / (np)->spread.X, (float)(y) / (np)->spread.Y, \
(float)(z) / (np)->spread.Z, (s) + (np)->seed, (np)->octaves, \
(np)->persist, true))
#endif
|
