/*
-Minetest-c55
-Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
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);
-
+#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;
+ int seed;
+ int octaves;
+ float persist;
+};
+
+
+// Convenience macros for getting/setting NoiseParams in Settings
+#define getNoiseParams(x, y) getStruct((x), "f,f,v3,s32,s32,f", &(y), sizeof(y))
+#define setNoiseParams(x, y) setStruct((x), "f,f,v3,s32,s32,f", &(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);
+ Noise(NoiseParams *np, int seed, int sx, int sy, int sz);
+ virtual ~Noise();
+
+ virtual 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 *perlinMap2DModulated(float x, float y, float *persist_map);
+ float *perlinMap3D(float x, float y, float z);
+ void transformNoiseMap();
+};
+
// Return value: -1 ... 1
-double noise2d(int x, int y, int seed);
+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))
-double noise2d_gradient(double x, double y, int seed);
+#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))
-double noise2d_perlin(double x, double y, int seed,
- int octaves, double persistence);
+#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))
#endif
projects / dragonfireclient.git / blobdiff