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
39 #define MG_BIOMES 0x40
41 typedef u8 biome_t; // copy from mg_biome.h to avoid an unnecessary include
47 extern FlagDesc flagdesc_mapgen[];
48 extern FlagDesc flagdesc_gennotify[];
56 class VoxelManipulator;
75 GENNOTIFY_LARGECAVE_BEGIN,
76 GENNOTIFY_LARGECAVE_END,
81 struct GenNotifyEvent {
87 class GenerateNotifier {
89 GenerateNotifier() = default;
90 GenerateNotifier(u32 notify_on, std::set<u32> *notify_on_deco_ids);
92 void setNotifyOn(u32 notify_on);
93 void setNotifyOnDecoIds(std::set<u32> *notify_on_deco_ids);
95 bool addEvent(GenNotifyType type, v3s16 pos, u32 id=0);
96 void getEvents(std::map<std::string, std::vector<v3s16> > &event_map);
101 std::set<u32> *m_notify_on_deco_ids;
102 std::list<GenNotifyEvent> m_notify_events;
117 struct MapgenParams {
118 MapgenParams() = default;
119 virtual ~MapgenParams();
121 MapgenType mgtype = MAPGEN_DEFAULT;
125 s16 mapgen_limit = MAX_MAP_GENERATION_LIMIT;
126 u32 flags = MG_CAVES | MG_LIGHT | MG_DECORATIONS | MG_BIOMES;
128 BiomeParams *bparams = nullptr;
130 s16 mapgen_edge_min = -MAX_MAP_GENERATION_LIMIT;
131 s16 mapgen_edge_max = MAX_MAP_GENERATION_LIMIT;
133 virtual void readParams(const Settings *settings);
134 virtual void writeParams(Settings *settings) const;
136 s32 getSpawnRangeMax();
139 void calcMapgenEdges();
140 bool m_mapgen_edges_calculated = false;
145 Generic interface for map generators. All mapgens must inherit this class.
146 If a feature exposed by a public member pointer is not supported by a
147 certain mapgen, it must be set to NULL.
149 Apart from makeChunk, getGroundLevelAtPoint, and getSpawnLevelAtPoint, all
150 methods can be used by constructing a Mapgen base class and setting the
151 appropriate public members (e.g. vm, ndef, and so on).
157 int mapgen_limit = 0;
159 bool generating = false;
162 MMVManip *vm = nullptr;
163 const NodeDefManager *ndef = nullptr;
166 s16 *heightmap = nullptr;
167 biome_t *biomemap = nullptr;
170 BiomeGen *biomegen = nullptr;
171 GenerateNotifier gennotify;
174 Mapgen(int mapgenid, MapgenParams *params, EmergeManager *emerge);
175 virtual ~Mapgen() = default;
176 DISABLE_CLASS_COPY(Mapgen);
178 virtual MapgenType getType() const { return MAPGEN_INVALID; }
180 static u32 getBlockSeed(v3s16 p, s32 seed);
181 static u32 getBlockSeed2(v3s16 p, s32 seed);
182 s16 findGroundLevelFull(v2s16 p2d);
183 s16 findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax);
184 s16 findLiquidSurface(v2s16 p2d, s16 ymin, s16 ymax);
185 void updateHeightmap(v3s16 nmin, v3s16 nmax);
186 void getSurfaces(v2s16 p2d, s16 ymin, s16 ymax,
187 std::vector<s16> &floors, std::vector<s16> &ceilings);
189 void updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax);
191 void setLighting(u8 light, v3s16 nmin, v3s16 nmax);
192 void lightSpread(VoxelArea &a, v3s16 p, u8 light);
193 void calcLighting(v3s16 nmin, v3s16 nmax, v3s16 full_nmin, v3s16 full_nmax,
194 bool propagate_shadow = true);
195 void propagateSunlight(v3s16 nmin, v3s16 nmax, bool propagate_shadow);
196 void spreadLight(v3s16 nmin, v3s16 nmax);
198 virtual void makeChunk(BlockMakeData *data) {}
199 virtual int getGroundLevelAtPoint(v2s16 p) { return 0; }
201 // getSpawnLevelAtPoint() is a function within each mapgen that returns a
202 // suitable y co-ordinate for player spawn ('suitable' usually meaning
203 // within 16 nodes of water_level). If a suitable spawn level cannot be
204 // found at the specified (X, Z) 'MAX_MAP_GENERATION_LIMIT' is returned to
205 // signify this and to cause Server::findSpawnPos() to try another (X, Z).
206 virtual int getSpawnLevelAtPoint(v2s16 p) { return 0; }
208 // Mapgen management functions
209 static MapgenType getMapgenType(const std::string &mgname);
210 static const char *getMapgenName(MapgenType mgtype);
211 static Mapgen *createMapgen(MapgenType mgtype, int mgid,
212 MapgenParams *params, EmergeManager *emerge);
213 static MapgenParams *createMapgenParams(MapgenType mgtype);
214 static void getMapgenNames(std::vector<const char *> *mgnames, bool include_hidden);
217 // isLiquidHorizontallyFlowable() is a helper function for updateLiquid()
218 // that checks whether there are floodable nodes without liquid beneath
219 // the node at index vi.
220 inline bool isLiquidHorizontallyFlowable(u32 vi, v3s16 em);
224 MapgenBasic is a Mapgen implementation that handles basic functionality
225 the majority of conventional mapgens will probably want to use, but isn't
226 generic enough to be included as part of the base Mapgen class (such as
227 generating biome terrain over terrain node skeletons, generating caves,
230 Inherit MapgenBasic instead of Mapgen to add this basic functionality to
231 your mapgen without having to reimplement it. Feel free to override any of
232 these methods if you desire different or more advanced behavior.
234 Note that you must still create your own generateTerrain implementation when
235 inheriting MapgenBasic.
237 class MapgenBasic : public Mapgen {
239 MapgenBasic(int mapgenid, MapgenParams *params, EmergeManager *emerge);
240 virtual ~MapgenBasic();
242 virtual void generateBiomes();
243 virtual void dustTopNodes();
244 virtual void generateCavesNoiseIntersection(s16 max_stone_y);
245 virtual void generateCavesRandomWalk(s16 max_stone_y, s16 large_cave_depth);
246 virtual bool generateCavernsNoise(s16 max_stone_y);
247 virtual void generateDungeons(s16 max_stone_y);
250 EmergeManager *m_emerge;
251 BiomeManager *m_bmgr;
253 Noise *noise_filler_depth;
260 // Content required for generateBiomes
262 content_t c_desert_stone;
263 content_t c_sandstone;
264 content_t c_water_source;
265 content_t c_river_water_source;
266 content_t c_lava_source;
268 // Content required for generateDungeons
270 content_t c_stair_cobble;
271 content_t c_mossycobble;
272 content_t c_stair_desert_stone;
273 content_t c_sandstonebrick;
274 content_t c_stair_sandstone_block;
283 NoiseParams np_cave1;
284 NoiseParams np_cave2;
285 NoiseParams np_cavern;
289 float cavern_threshold;