3 Copyright (C) 2010-2018 celeron55, Perttu Ahola <celeron55@gmail.com>
4 Copyright (C) 2013-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
5 Copyright (C) 2015-2018 paramat
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License along
18 with this program; if not, write to the Free Software Foundation, Inc.,
19 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 #include "util/string.h"
27 #include "util/container.h"
29 #define MAPGEN_DEFAULT MAPGEN_V7
30 #define MAPGEN_DEFAULT_NAME "v7"
32 /////////////////// Mapgen flags
33 #define MG_TREES 0x01 // Deprecated. Moved into mgv6 flags
35 #define MG_DUNGEONS 0x04
36 #define MG_FLAT 0x08 // Deprecated. Moved into mgv6 flags
38 #define MG_DECORATIONS 0x20
40 typedef u8 biome_t; // copy from mg_biome.h to avoid an unnecessary include
46 extern FlagDesc flagdesc_mapgen[];
47 extern FlagDesc flagdesc_gennotify[];
55 class VoxelManipulator;
74 GENNOTIFY_LARGECAVE_BEGIN,
75 GENNOTIFY_LARGECAVE_END,
80 struct GenNotifyEvent {
86 class GenerateNotifier {
88 GenerateNotifier() = default;
89 GenerateNotifier(u32 notify_on, std::set<u32> *notify_on_deco_ids);
91 void setNotifyOn(u32 notify_on);
92 void setNotifyOnDecoIds(std::set<u32> *notify_on_deco_ids);
94 bool addEvent(GenNotifyType type, v3s16 pos, u32 id=0);
95 void getEvents(std::map<std::string, std::vector<v3s16> > &event_map);
100 std::set<u32> *m_notify_on_deco_ids;
101 std::list<GenNotifyEvent> m_notify_events;
116 struct MapgenParams {
117 MapgenParams() = default;
118 virtual ~MapgenParams();
120 MapgenType mgtype = MAPGEN_DEFAULT;
124 s16 mapgen_limit = MAX_MAP_GENERATION_LIMIT;
125 u32 flags = MG_CAVES | MG_LIGHT | MG_DECORATIONS;
127 BiomeParams *bparams = nullptr;
129 s16 mapgen_edge_min = -MAX_MAP_GENERATION_LIMIT;
130 s16 mapgen_edge_max = MAX_MAP_GENERATION_LIMIT;
132 virtual void readParams(const Settings *settings);
133 virtual void writeParams(Settings *settings) const;
135 s32 getSpawnRangeMax();
138 void calcMapgenEdges();
139 bool m_mapgen_edges_calculated = false;
144 Generic interface for map generators. All mapgens must inherit this class.
145 If a feature exposed by a public member pointer is not supported by a
146 certain mapgen, it must be set to NULL.
148 Apart from makeChunk, getGroundLevelAtPoint, and getSpawnLevelAtPoint, all
149 methods can be used by constructing a Mapgen base class and setting the
150 appropriate public members (e.g. vm, ndef, and so on).
156 int mapgen_limit = 0;
158 bool generating = false;
161 MMVManip *vm = nullptr;
162 const NodeDefManager *ndef = nullptr;
165 s16 *heightmap = nullptr;
166 biome_t *biomemap = nullptr;
169 BiomeGen *biomegen = nullptr;
170 GenerateNotifier gennotify;
173 Mapgen(int mapgenid, MapgenParams *params, EmergeManager *emerge);
174 virtual ~Mapgen() = default;
175 DISABLE_CLASS_COPY(Mapgen);
177 virtual MapgenType getType() const { return MAPGEN_INVALID; }
179 static u32 getBlockSeed(v3s16 p, s32 seed);
180 static u32 getBlockSeed2(v3s16 p, s32 seed);
181 s16 findGroundLevelFull(v2s16 p2d);
182 s16 findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax);
183 s16 findLiquidSurface(v2s16 p2d, s16 ymin, s16 ymax);
184 void updateHeightmap(v3s16 nmin, v3s16 nmax);
185 void getSurfaces(v2s16 p2d, s16 ymin, s16 ymax,
186 std::vector<s16> &floors, std::vector<s16> &ceilings);
188 void updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax);
190 void setLighting(u8 light, v3s16 nmin, v3s16 nmax);
191 void lightSpread(VoxelArea &a, v3s16 p, u8 light);
192 void calcLighting(v3s16 nmin, v3s16 nmax, v3s16 full_nmin, v3s16 full_nmax,
193 bool propagate_shadow = true);
194 void propagateSunlight(v3s16 nmin, v3s16 nmax, bool propagate_shadow);
195 void spreadLight(v3s16 nmin, v3s16 nmax);
197 virtual void makeChunk(BlockMakeData *data) {}
198 virtual int getGroundLevelAtPoint(v2s16 p) { return 0; }
200 // getSpawnLevelAtPoint() is a function within each mapgen that returns a
201 // suitable y co-ordinate for player spawn ('suitable' usually meaning
202 // within 16 nodes of water_level). If a suitable spawn level cannot be
203 // found at the specified (X, Z) 'MAX_MAP_GENERATION_LIMIT' is returned to
204 // signify this and to cause Server::findSpawnPos() to try another (X, Z).
205 virtual int getSpawnLevelAtPoint(v2s16 p) { return 0; }
207 // Mapgen management functions
208 static MapgenType getMapgenType(const std::string &mgname);
209 static const char *getMapgenName(MapgenType mgtype);
210 static Mapgen *createMapgen(MapgenType mgtype, int mgid,
211 MapgenParams *params, EmergeManager *emerge);
212 static MapgenParams *createMapgenParams(MapgenType mgtype);
213 static void getMapgenNames(std::vector<const char *> *mgnames, bool include_hidden);
216 // isLiquidHorizontallyFlowable() is a helper function for updateLiquid()
217 // that checks whether there are floodable nodes without liquid beneath
218 // the node at index vi.
219 inline bool isLiquidHorizontallyFlowable(u32 vi, v3s16 em);
223 MapgenBasic is a Mapgen implementation that handles basic functionality
224 the majority of conventional mapgens will probably want to use, but isn't
225 generic enough to be included as part of the base Mapgen class (such as
226 generating biome terrain over terrain node skeletons, generating caves,
229 Inherit MapgenBasic instead of Mapgen to add this basic functionality to
230 your mapgen without having to reimplement it. Feel free to override any of
231 these methods if you desire different or more advanced behavior.
233 Note that you must still create your own generateTerrain implementation when
234 inheriting MapgenBasic.
236 class MapgenBasic : public Mapgen {
238 MapgenBasic(int mapgenid, MapgenParams *params, EmergeManager *emerge);
239 virtual ~MapgenBasic();
241 virtual void generateCaves(s16 max_stone_y, s16 large_cave_depth);
242 virtual bool generateCaverns(s16 max_stone_y);
243 virtual void generateDungeons(s16 max_stone_y);
244 virtual void generateBiomes();
245 virtual void dustTopNodes();
248 EmergeManager *m_emerge;
249 BiomeManager *m_bmgr;
251 Noise *noise_filler_depth;
258 // Content required for generateBiomes
260 content_t c_desert_stone;
261 content_t c_sandstone;
262 content_t c_water_source;
263 content_t c_river_water_source;
264 content_t c_lava_source;
266 // Content required for generateDungeons
268 content_t c_stair_cobble;
269 content_t c_mossycobble;
270 content_t c_stair_desert_stone;
271 content_t c_sandstonebrick;
272 content_t c_stair_sandstone_block;
281 NoiseParams np_cave1;
282 NoiseParams np_cave2;
283 NoiseParams np_cavern;
287 float cavern_threshold;