/*
-Minetest-c55
-Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
+Minetest
+Copyright (C) 2010-2013 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
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 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.
+GNU Lesser General Public License for more details.
-You should have received a copy of the GNU General Public License along
+You should have received a copy of the GNU Lesser 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);
+#include "debug.h"
+#include "irr_v3d.h"
-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
+class PseudoRandom
{
- NOISE_PERLIN,
- NOISE_PERLIN_ABS,
- NOISE_PERLIN_CONTOUR,
- NOISE_PERLIN_CONTOUR_FLIP_YZ
+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
-{
- NoiseType type;
+struct NoiseParams {
+ float offset;
+ float scale;
+ v3f spread;
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_)
- {
- }
+ float persist;
};
-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);
- //bool contains(double x, double y, double z);
+// Convenience macros for getting/setting NoiseParams in Settings
+#define getNoiseParams(x) getStruct<NoiseParams>((x), "f,f,v3,s32,s32,f")
+#define setNoiseParams(x, y) setStruct((x), "f,f,v3,s32,s32,f", (y))
-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;
+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);
+ Noise(NoiseParams *np, int seed, int sx, int sy, int sz);
+ ~Noise();
+
+ void init(NoiseParams *np, int seed, int sx, int sy, int sz);
+ void setSize(int sx, int sy);
+ void setSize(int sx, int sy, int sz);
+ 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);
+ float *perlinMap2D(float x, float y);
+ float *perlinMap3D(float x, float y, float z);
+ 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);
+
+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);
+
+float noise3d_perlin_abs(float x, float y, float z, int seed,
+ int octaves, float persistence);
+
+inline float easeCurve(float t) {
+ return t * t * t * (t * (6.f * t - 15.f) + 10.f);
+}
+
+#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 * \
+ noise2d_perlin((float)(x) / (np)->spread.X, (float)(y) / (np)->spread.Y, \
+ (float)(z) / (np)->spread.Z, (s) + (np)->seed, (np)->octaves, (np)->persist))
+
#endif
projects / minetest.git / blobdiff