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diff --git a/src/biome.h b/src/biome.h
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+/*
+Minetest-c55
+Copyright (C) 2010-2011 kwolekr, Ryan Kwolek <kwolekr2@cs.scranton.edu>
+
+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 BIOME_HEADER
+#define BIOME_HEADER
+
+#include "nodedef.h"
+#include "gamedef.h"
+#include "mapnode.h"
+#include "noise.h"
+#include "mapgen.h"
+
+class Biome {
+public:
+	MapNode n_top;
+	MapNode n_filler;
+	s16 ntopnodes;
+	s16 flags;
+	s16 height_min;
+	s16 height_max;
+	float heat_min;
+	float heat_max;
+	float humidity_min;
+	float humidity_max;
+	const char *name;
+	NoiseParams *np;
+
+	virtual void genColumn(Mapgen *mg, int x, int z, int y1, int y2);
+	virtual int getSurfaceHeight(float noise_terrain);
+};
+
+class BiomeOcean : public Biome {
+	virtual void genColumn(Mapgen *mg, int x, int z, int y1, int y2);
+};
+
+class BiomeHell : public Biome {
+	virtual void genColumn(Mapgen *mg, int x, int z, int y1, int y2);
+	virtual int getSurfaceHeight(float noise_terrain);
+};
+
+class BiomeSuperflat : public Biome {
+	virtual void genColumn(Mapgen *mg, int x, int z, int y1, int y2);
+	virtual int getSurfaceHeight(float noise_terrain);
+};
+
+class BiomeDefManager {
+public:
+	std::vector<float> bgroup_freqs;
+	std::vector<std::vector<Biome *> *> bgroups;
+	Biome *biome_default;
+	IGameDef *m_gamedef;
+	INodeDefManager *ndef;
+
+	BiomeDefManager(IGameDef *gamedef);
+	~BiomeDefManager();
+
+	Biome *getBiome(float bgfreq, float heat, float humidity);
+
+	void addBiome();
+	void addDefaultBiomes();
+};
+
+#endif