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,
87 struct GenNotifyEvent {
93 class GenerateNotifier {
95 GenerateNotifier() = default;
96 GenerateNotifier(u32 notify_on, std::set<u32> *notify_on_deco_ids);
98 void setNotifyOn(u32 notify_on);
99 void setNotifyOnDecoIds(std::set<u32> *notify_on_deco_ids);
101 bool addEvent(GenNotifyType type, v3s16 pos, u32 id=0);
102 void getEvents(std::map<std::string, std::vector<v3s16> > &event_map,
103 bool peek_events=false);
107 std::set<u32> *m_notify_on_deco_ids;
108 std::list<GenNotifyEvent> m_notify_events;
123 struct MapgenParams {
124 MapgenParams() = default;
125 virtual ~MapgenParams();
127 MapgenType mgtype = MAPGEN_DEFAULT;
131 s16 mapgen_limit = MAX_MAP_GENERATION_LIMIT;
132 u32 flags = MG_CAVES | MG_LIGHT | MG_DECORATIONS;
134 BiomeParams *bparams = nullptr;
136 s16 mapgen_edge_min = -MAX_MAP_GENERATION_LIMIT;
137 s16 mapgen_edge_max = MAX_MAP_GENERATION_LIMIT;
139 virtual void readParams(const Settings *settings);
140 virtual void writeParams(Settings *settings) const;
142 s32 getSpawnRangeMax();
145 void calcMapgenEdges();
146 bool m_mapgen_edges_calculated = false;
151 Generic interface for map generators. All mapgens must inherit this class.
152 If a feature exposed by a public member pointer is not supported by a
153 certain mapgen, it must be set to NULL.
155 Apart from makeChunk, getGroundLevelAtPoint, and getSpawnLevelAtPoint, all
156 methods can be used by constructing a Mapgen base class and setting the
157 appropriate public members (e.g. vm, ndef, and so on).
163 int mapgen_limit = 0;
165 bool generating = false;
168 MMVManip *vm = nullptr;
169 const NodeDefManager *ndef = nullptr;
172 s16 *heightmap = nullptr;
173 biome_t *biomemap = nullptr;
176 BiomeGen *biomegen = nullptr;
177 GenerateNotifier gennotify;
180 Mapgen(int mapgenid, MapgenParams *params, EmergeManager *emerge);
181 virtual ~Mapgen() = default;
182 DISABLE_CLASS_COPY(Mapgen);
184 virtual MapgenType getType() const { return MAPGEN_INVALID; }
186 static u32 getBlockSeed(v3s16 p, s32 seed);
187 static u32 getBlockSeed2(v3s16 p, s32 seed);
188 s16 findGroundLevelFull(v2s16 p2d);
189 s16 findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax);
190 s16 findLiquidSurface(v2s16 p2d, s16 ymin, s16 ymax);
191 void updateHeightmap(v3s16 nmin, v3s16 nmax);
192 void getSurfaces(v2s16 p2d, s16 ymin, s16 ymax,
193 std::vector<s16> &floors, std::vector<s16> &ceilings);
195 void updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax);
197 void setLighting(u8 light, v3s16 nmin, v3s16 nmax);
198 void lightSpread(VoxelArea &a, v3s16 p, u8 light);
199 void calcLighting(v3s16 nmin, v3s16 nmax, v3s16 full_nmin, v3s16 full_nmax,
200 bool propagate_shadow = true);
201 void propagateSunlight(v3s16 nmin, v3s16 nmax, bool propagate_shadow);
202 void spreadLight(v3s16 nmin, v3s16 nmax);
204 virtual void makeChunk(BlockMakeData *data) {}
205 virtual int getGroundLevelAtPoint(v2s16 p) { return 0; }
207 // getSpawnLevelAtPoint() is a function within each mapgen that returns a
208 // suitable y co-ordinate for player spawn ('suitable' usually meaning
209 // within 16 nodes of water_level). If a suitable spawn level cannot be
210 // found at the specified (X, Z) 'MAX_MAP_GENERATION_LIMIT' is returned to
211 // signify this and to cause Server::findSpawnPos() to try another (X, Z).
212 virtual int getSpawnLevelAtPoint(v2s16 p) { return 0; }
214 // Mapgen management functions
215 static MapgenType getMapgenType(const std::string &mgname);
216 static const char *getMapgenName(MapgenType mgtype);
217 static Mapgen *createMapgen(MapgenType mgtype, int mgid,
218 MapgenParams *params, EmergeManager *emerge);
219 static MapgenParams *createMapgenParams(MapgenType mgtype);
220 static void getMapgenNames(std::vector<const char *> *mgnames, bool include_hidden);
223 // isLiquidHorizontallyFlowable() is a helper function for updateLiquid()
224 // that checks whether there are floodable nodes without liquid beneath
225 // the node at index vi.
226 inline bool isLiquidHorizontallyFlowable(u32 vi, v3s16 em);
230 MapgenBasic is a Mapgen implementation that handles basic functionality
231 the majority of conventional mapgens will probably want to use, but isn't
232 generic enough to be included as part of the base Mapgen class (such as
233 generating biome terrain over terrain node skeletons, generating caves,
236 Inherit MapgenBasic instead of Mapgen to add this basic functionality to
237 your mapgen without having to reimplement it. Feel free to override any of
238 these methods if you desire different or more advanced behavior.
240 Note that you must still create your own generateTerrain implementation when
241 inheriting MapgenBasic.
243 class MapgenBasic : public Mapgen {
245 MapgenBasic(int mapgenid, MapgenParams *params, EmergeManager *emerge);
246 virtual ~MapgenBasic();
248 virtual void generateCaves(s16 max_stone_y, s16 large_cave_depth);
249 virtual bool generateCaverns(s16 max_stone_y);
250 virtual void generateDungeons(s16 max_stone_y,
251 MgStoneType stone_type, content_t biome_stone);
252 virtual void generateBiomes(MgStoneType *mgstone_type,
253 content_t *biome_stone);
254 virtual void dustTopNodes();
257 EmergeManager *m_emerge;
258 BiomeManager *m_bmgr;
260 Noise *noise_filler_depth;
267 // Content required for generateBiomes
269 content_t c_desert_stone;
270 content_t c_sandstone;
271 content_t c_water_source;
272 content_t c_river_water_source;
273 content_t c_lava_source;
275 // Content required for generateDungeons
277 content_t c_stair_cobble;
278 content_t c_mossycobble;
279 content_t c_stair_desert_stone;
280 content_t c_sandstonebrick;
281 content_t c_stair_sandstone_block;
290 NoiseParams np_cave1;
291 NoiseParams np_cave2;
292 NoiseParams np_cavern;
296 float cavern_threshold;