New math mapgen with fractal based worlds

src/mapgen_math.h

@@ -0,0 +1,70 @@
+/*
+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 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 Lesser General Public License for more details.
+
+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 MAPGEN_MATH_HEADER
+#define MAPGEN_MATH_HEADER
+
+#include "mapgen.h"
+#include "mapgen_v7.h"
+#include "json/json.h"
+
+struct MapgenMathParams : public MapgenV7Params {
+
+	MapgenMathParams() {
+	}
+
+	Json::Value params;
+
+	bool readParams(Settings *settings);
+	void writeParams(Settings *settings);
+};
+
+class MapgenMath : public MapgenV7 {
+	public:
+		MapgenMathParams * mg_params;
+
+		MapgenMath(int mapgenid, MapgenMathParams *mg_params, EmergeManager *emerge);
+		~MapgenMath();
+
+
+		//void makeChunk(BlockMakeData *data);
+		void generateTerrain();
+		int getGroundLevelAtPoint(v2s16 p);
+
+		bool invert;
+		double size;
+		double scale;
+		v3f center;
+		int iterations;
+		double distance;
+		double (*func)(double, double, double, double, int);
+
+};
+
+struct MapgenFactoryMath : public MapgenFactory {
+	Mapgen *createMapgen(int mgid, MapgenParams *params, EmergeManager *emerge) {
+		return new MapgenMath(mgid, (MapgenMathParams *)params, emerge);
+	};
+
+	MapgenParams *createMapgenParams() {
+		return new MapgenMathParams();
+	};
+};
+
+#endif