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diff --git a/src/cavegen.h b/src/cavegen.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 CAVEGEN_HEADER
+#define CAVEGEN_HEADER
+
+#define VMANIP_FLAG_CAVE VOXELFLAG_CHECKED1
+
+class CaveV6 {
+public:
+	ManualMapVoxelManipulator *vm;
+
+	s16 min_tunnel_diameter;
+	s16 max_tunnel_diameter;
+	u16 tunnel_routepoints;
+	int dswitchint;
+	int part_max_length_rs;
+
+	bool large_cave;
+	bool large_cave_is_flat;
+	bool flooded;
+
+	s16 max_stone_y;
+	v3s16 node_min;
+	v3s16 node_max;
+	
+	v3f orp;  //original point
+	v3s16 of;
+	v3s16 ar; // allowed route area
+	s16 rs;   // radius size
+	v3f main_direction;
+	
+	s16 route_y_min;
+	s16 route_y_max;
+	
+	PseudoRandom *ps;
+	PseudoRandom *ps2;
+	
+	content_t c_water_source;
+	content_t c_lava_source;
+	
+	int water_level;
+
+	CaveV6() {}
+	CaveV6(Mapgen *mg, PseudoRandom *ps, PseudoRandom *ps2, bool large_cave,
+			content_t c_water, content_t c_lava);
+	void makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height);
+	void makeTunnel(bool dirswitch);
+	void carveRoute(v3f vec, float f, bool randomize_xz);
+};
+
+#endif