X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Fnoise.h;h=670c2eddca014b4c3a488d525872177c9734a2bb;hb=183c81b5ecf4f9350936737f5091073d81733d73;hp=63974e86ab38d832937ec7f0941205e0b8b76351;hpb=48a772b3c6388cbe7f9003557f27cc2cf51b8fe8;p=oweals%2Fminetest.git

diff --git a/src/noise.h b/src/noise.h
index 63974e86a..670c2eddc 100644
--- a/src/noise.h
+++ b/src/noise.h
@@ -3,16 +3,16 @@ 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
+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.
 */
@@ -20,6 +20,45 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #ifndef NOISE_HEADER
 #define NOISE_HEADER
 
+#include "debug.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;
+};
+
 double easeCurve(double t);
  
 // Return value: -1 ... 1
@@ -32,8 +71,79 @@ 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_CONSTANT_ONE,
+	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 &param, double x, double y, double z);
+
+class NoiseBuffer
+{
+public:
+	NoiseBuffer();
+	~NoiseBuffer();
+	
+	void clear();
+	void create(const NoiseParams &param,
+			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 &param);
+	// 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);
+
+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