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diff --git a/src/mg_biome.h b/src/mg_biome.h
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+/*
+Minetest
+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 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 MG_BIOME_HEADER
+#define MG_BIOME_HEADER
+
+#include <string>
+#include "nodedef.h"
+#include "gamedef.h"
+#include "mapnode.h"
+#include "noise.h"
+#include "mapgen.h"
+
+enum BiomeTerrainType
+{
+	BIOME_TERRAIN_NORMAL,
+	BIOME_TERRAIN_LIQUID,
+	BIOME_TERRAIN_NETHER,
+	BIOME_TERRAIN_AETHER,
+	BIOME_TERRAIN_FLAT
+};
+
+extern NoiseParams nparams_biome_def_heat;
+extern NoiseParams nparams_biome_def_humidity;
+
+class Biome {
+public:
+	u8 id;
+	std::string name;
+	u32 flags;
+
+	content_t c_top;
+	content_t c_filler;
+	content_t c_water;
+	content_t c_dust;
+	content_t c_dust_water;
+
+	s16 depth_top;
+	s16 depth_filler;
+
+	s16 height_min;
+	s16 height_max;
+	float heat_point;
+	float humidity_point;
+};
+
+struct BiomeNoiseInput {
+	v2s16 mapsize;
+	float *heat_map;
+	float *humidity_map;
+	s16 *height_map;
+};
+
+class BiomeDefManager {
+public:
+	std::vector<Biome *> biomes;
+
+	bool biome_registration_finished;
+	NoiseParams *np_heat;
+	NoiseParams *np_humidity;
+
+	BiomeDefManager(NodeResolver *resolver);
+	~BiomeDefManager();
+
+	Biome *createBiome(BiomeTerrainType btt);
+	void  calcBiomes(BiomeNoiseInput *input, u8 *biomeid_map);
+	Biome *getBiome(float heat, float humidity, s16 y);
+
+	bool addBiome(Biome *b);
+	u8 getBiomeIdByName(const char *name);
+
+	s16 calcBlockHeat(v3s16 p, u64 seed, float timeofday, float totaltime);
+	s16 calcBlockHumidity(v3s16 p, u64 seed, float timeofday, float totaltime);
+};
+
+#endif