Make mapgen factory setup more elegant, add mapgen_v6.h

1 files changed, 141 insertions, 0 deletions

diff --git a/src/mapgen_v6.h b/src/mapgen_v6.h
new file mode 100644
index 000000000..9a2a0287d
--- /dev/null
+++ b/src/mapgen_v6.h
@@ -0,0 +1,141 @@
+/*
+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 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 MAPGENV6_HEADER
+#define MAPGENV6_HEADER
+
+#include "mapgen.h"
+
+#define AVERAGE_MUD_AMOUNT 4
+
+enum BiomeType
+{
+	BT_NORMAL,
+	BT_DESERT
+};
+
+extern NoiseParams nparams_v6_def_terrain_base;
+extern NoiseParams nparams_v6_def_terrain_higher;
+extern NoiseParams nparams_v6_def_steepness;
+extern NoiseParams nparams_v6_def_height_select;
+extern NoiseParams nparams_v6_def_trees;
+extern NoiseParams nparams_v6_def_mud;
+extern NoiseParams nparams_v6_def_beach;
+extern NoiseParams nparams_v6_def_biome;
+extern NoiseParams nparams_v6_def_cave;
+
+struct MapgenV6Params : public MapgenParams {
+	float freq_desert;
+	float freq_beach;
+	NoiseParams *np_terrain_base;
+	NoiseParams *np_terrain_higher;
+	NoiseParams *np_steepness;
+	NoiseParams *np_height_select;
+	NoiseParams *np_trees;
+	NoiseParams *np_mud;
+	NoiseParams *np_beach;
+	NoiseParams *np_biome;
+	NoiseParams *np_cave;
+
+	MapgenV6Params() {
+		freq_desert       = 0.45;
+		freq_beach        = 0.15;
+		np_terrain_base   = &nparams_v6_def_terrain_base;
+		np_terrain_higher = &nparams_v6_def_terrain_higher;
+		np_steepness      = &nparams_v6_def_steepness;
+		np_height_select  = &nparams_v6_def_height_select;
+		np_trees          = &nparams_v6_def_trees;
+		np_mud            = &nparams_v6_def_mud;
+		np_beach          = &nparams_v6_def_beach;
+		np_biome          = &nparams_v6_def_biome;
+		np_cave           = &nparams_v6_def_cave;
+	}
+	
+	bool readParams(Settings *settings);
+	void writeParams(Settings *settings);
+};
+
+class MapgenV6 : public Mapgen {
+public:
+	//ManualMapVoxelManipulator &vmanip;
+
+	int ystride;
+	v3s16 csize;
+
+	v3s16 node_min;
+	v3s16 node_max;
+
+	Noise *noise_terrain_base;
+	Noise *noise_terrain_higher;
+	Noise *noise_steepness;
+	Noise *noise_height_select;
+	Noise *noise_trees;
+	Noise *noise_mud;
+	Noise *noise_beach;
+	Noise *noise_biome;
+
+	float *map_terrain_base;
+	float *map_terrain_higher;
+	float *map_steepness;
+	float *map_height_select;
+	float *map_trees;
+	float *map_mud;
+	float *map_beach;
+	float *map_biome;
+
+	NoiseParams *np_cave;
+
+	u32 flags;
+	float freq_desert;
+	float freq_beach;
+
+	MapgenV6(int mapgenid, MapgenV6Params *params);
+	~MapgenV6();
+	
+	void makeChunk(BlockMakeData *data);
+	int getGroundLevelAtPoint(v2s16 p);
+
+	double baseRockLevelFromNoise(v2s16 p);
+	static s16 find_ground_level(VoxelManipulator &vmanip,
+								 v2s16 p2d, INodeDefManager *ndef);
+	static s16 find_stone_level(VoxelManipulator &vmanip,
+								 v2s16 p2d, INodeDefManager *ndef);
+	void make_tree(ManualMapVoxelManipulator &vmanip, v3s16 p0,
+					 bool is_apple_tree, INodeDefManager *ndef);
+	double tree_amount_2d(u64 seed, v2s16 p);
+	bool block_is_underground(u64 seed, v3s16 blockpos);
+	double base_rock_level_2d(u64 seed, v2s16 p);
+	s16 find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision);
+	double get_mud_add_amount(u64 seed, v2s16 p);
+	bool get_have_beach(u64 seed, v2s16 p2d);
+	BiomeType get_biome(u64 seed, v2s16 p2d);
+	u32 get_blockseed(u64 seed, v3s16 p);
+};
+
+struct MapgenFactoryV6 : public MapgenFactory {
+	Mapgen *createMapgen(int mgid, MapgenParams *params, EmergeManager *emerge) {
+		return new MapgenV6(mgid, (MapgenV6Params *)params);
+	};
+	
+	MapgenParams *createMapgenParams() {
+		return new MapgenV6Params();
+	};
+};
+
+#endif