3 Copyright (C) 2015 est31 <mtest31@outlook.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 #include "noise.h" // for PcgRandom
29 #include "util/container.h"
30 #include "util/numeric.h"
32 #include "cmake_config.h"
35 #include <spatialindex/SpatialIndex.h>
36 #include "util/serialize.h"
42 Area(const v3s16 &mine, const v3s16 &maxe) :
43 minedge(mine), maxedge(maxe)
45 sortBoxVerticies(minedge, maxedge);
49 v3s16 minedge, maxedge;
57 m_cache_enabled(true),
58 m_cacheblock_radius(64),
59 m_res_cache(1000, &cacheMiss, this),
63 virtual ~AreaStore() {}
65 static AreaStore *getOptimalImplementation();
67 virtual void reserve(size_t count) {};
68 size_t size() const { return areas_map.size(); }
70 /// Add an area to the store.
71 /// Updates the area's ID.
72 virtual bool insertArea(Area *a) = 0;
74 /// Removes an area from the store by ID.
75 /// @return Whether the area was in the store and removed.
76 virtual bool removeArea(u32 id) = 0;
78 /// Finds areas that the passed position is contained in.
79 /// Stores output in passed vector.
80 void getAreasForPos(std::vector<Area *> *result, v3s16 pos);
82 /// Finds areas that are completely contained inside the area defined
83 /// by the passed edges. If @p accept_overlap is true this finds any
84 /// areas that intersect with the passed area at any point.
85 virtual void getAreasInArea(std::vector<Area *> *result,
86 v3s16 minedge, v3s16 maxedge, bool accept_overlap) = 0;
88 /// Sets cache parameters.
89 void setCacheParams(bool enabled, u8 block_radius, size_t limit);
91 /// Returns a pointer to the area coresponding to the passed ID,
92 /// or NULL if it doesn't exist.
93 const Area *getArea(u32 id) const;
95 /// Serializes the store's areas to a binary ostream.
96 void serialize(std::ostream &is) const;
98 /// Deserializes the Areas from a binary istream.
99 /// This does not currently clear the AreaStore before adding the
100 /// areas, making it possible to deserialize multiple serialized
102 void deserialize(std::istream &is);
105 /// Invalidates the getAreasForPos cache.
106 /// Call after adding or removing an area.
107 void invalidateCache();
109 /// Implementation of getAreasForPos.
110 /// getAreasForPos calls this if the cache is disabled.
111 virtual void getAreasForPosImpl(std::vector<Area *> *result, v3s16 pos) = 0;
113 /// Returns the next area ID and increments it.
114 u32 getNextId() { return m_next_id++; }
116 // Note: This can't be an unordered_map, since all
117 // references would be invalidated on rehash.
118 typedef std::map<u32, Area> AreaMap;
122 /// Called by the cache when a value isn't found in the cache.
123 static void cacheMiss(void *data, const v3s16 &mpos, std::vector<Area *> *dest);
125 bool m_cache_enabled;
126 /// Range, in nodes, of the getAreasForPos cache.
127 /// If you modify this, call invalidateCache()
128 u8 m_cacheblock_radius;
129 LRUCache<v3s16, std::vector<Area *> > m_res_cache;
135 class VectorAreaStore : public AreaStore {
137 virtual void reserve(size_t count) { m_areas.reserve(count); }
138 virtual bool insertArea(Area *a);
139 virtual bool removeArea(u32 id);
140 virtual void getAreasInArea(std::vector<Area *> *result,
141 v3s16 minedge, v3s16 maxedge, bool accept_overlap);
144 virtual void getAreasForPosImpl(std::vector<Area *> *result, v3s16 pos);
147 std::vector<Area *> m_areas;
153 class SpatialAreaStore : public AreaStore {
156 virtual ~SpatialAreaStore();
158 virtual bool insertArea(Area *a);
159 virtual bool removeArea(u32 id);
160 virtual void getAreasInArea(std::vector<Area *> *result,
161 v3s16 minedge, v3s16 maxedge, bool accept_overlap);
164 virtual void getAreasForPosImpl(std::vector<Area *> *result, v3s16 pos);
167 SpatialIndex::ISpatialIndex *m_tree;
168 SpatialIndex::IStorageManager *m_storagemanager;
170 class VectorResultVisitor : public SpatialIndex::IVisitor {
172 VectorResultVisitor(std::vector<Area *> *result, SpatialAreaStore *store) :
176 ~VectorResultVisitor() {}
178 virtual void visitNode(const SpatialIndex::INode &in) {}
180 virtual void visitData(const SpatialIndex::IData &in)
182 u32 id = in.getIdentifier();
184 std::map<u32, Area>::iterator itr = m_store->areas_map.find(id);
185 assert(itr != m_store->areas_map.end());
186 m_result->push_back(&itr->second);
189 virtual void visitData(std::vector<const SpatialIndex::IData *> &v)
191 for (size_t i = 0; i < v.size(); i++)
196 SpatialAreaStore *m_store;
197 std::vector<Area *> *m_result;
201 #endif // USE_SPATIAL
203 #endif // AREA_STORE_H_