src/content_abm.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   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.
   9
  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.
  14
  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.
  18 */
  19
  20 #include "content_abm.h"
  21
  22 #include "environment.h"
  23 #include "gamedef.h"
  24 #include "nodedef.h"
  25 #include "content_sao.h"
  26 #include "settings.h"
  27 #include "mapblock.h" // For getNodeBlockPos
  28 #include "treegen.h" // For treegen::make_tree
  29 #include "main.h" // for g_settings
  30 #include "map.h"
  31
  32 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
  33
  34 class GrowGrassABM : public ActiveBlockModifier
  35 {
  36 private:
  37 public:
  38         virtual std::set<std::string> getTriggerContents()
  39         {
  40                 std::set<std::string> s;
  41                 s.insert("mapgen_dirt");
  42                 return s;
  43         }
  44         virtual float getTriggerInterval()
  45         { return 2.0; }
  46         virtual u32 getTriggerChance()
  47         { return 200; }
  48         virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n)
  49         {
  50                 INodeDefManager *ndef = env->getGameDef()->ndef();
  51                 ServerMap *map = &env->getServerMap();
  52
  53                 MapNode n_top = map->getNodeNoEx(p+v3s16(0,1,0));
  54                 content_t c_snow = ndef->getId("snow");
  55                 if(ndef->get(n_top).light_propagates &&
  56                                 !ndef->get(n_top).isLiquid() &&
  57                                 n_top.getLightBlend(env->getDayNightRatio(), ndef) >= 13)
  58                 {
  59                         if(c_snow != CONTENT_IGNORE && n_top.getContent() == c_snow)
  60                                 n.setContent(ndef->getId("dirt_with_snow"));
  61                         else
  62                                 n.setContent(ndef->getId("mapgen_dirt_with_grass"));
  63                         map->addNodeWithEvent(p, n);
  64                 }
  65         }
  66 };
  67
  68 class RemoveGrassABM : public ActiveBlockModifier
  69 {
  70 private:
  71 public:
  72         virtual std::set<std::string> getTriggerContents()
  73         {
  74                 std::set<std::string> s;
  75                 s.insert("mapgen_dirt_with_grass");
  76                 return s;
  77         }
  78         virtual float getTriggerInterval()
  79         { return 2.0; }
  80         virtual u32 getTriggerChance()
  81         { return 20; }
  82         virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n)
  83         {
  84                 INodeDefManager *ndef = env->getGameDef()->ndef();
  85                 ServerMap *map = &env->getServerMap();
  86
  87                 MapNode n_top = map->getNodeNoEx(p+v3s16(0,1,0));
  88                 if((!ndef->get(n_top).light_propagates &&
  89                                 n_top.getContent() != CONTENT_IGNORE) ||
  90                                 ndef->get(n_top).isLiquid())
  91                 {
  92                         n.setContent(ndef->getId("mapgen_dirt"));
  93                         map->addNodeWithEvent(p, n);
  94                 }
  95         }
  96 };
  97
  98 class MakeTreesFromSaplingsABM : public ActiveBlockModifier
  99 {
 100 private:
 101         content_t c_junglesapling;
 102
 103 public:
 104         MakeTreesFromSaplingsABM(ServerEnvironment *env, INodeDefManager *nodemgr) {
 105                 c_junglesapling = nodemgr->getId("junglesapling");
 106         }
 107
 108         virtual std::set<std::string> getTriggerContents()
 109         {
 110                 std::set<std::string> s;
 111                 s.insert("sapling");
 112                 s.insert("junglesapling");
 113                 return s;
 114         }
 115         virtual float getTriggerInterval()
 116         { return 10.0; }
 117         virtual u32 getTriggerChance()
 118         { return 50; }
 119         virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n,
 120                         u32 active_object_count, u32 active_object_count_wider)
 121         {
 122                 INodeDefManager *ndef = env->getGameDef()->ndef();
 123                 ServerMap *map = &env->getServerMap();
 124
 125                 MapNode n_below = map->getNodeNoEx(p - v3s16(0, 1, 0));
 126                 if (!((ItemGroupList) ndef->get(n_below).groups)["soil"])
 127                         return;
 128
 129                 bool is_jungle_tree = n.getContent() == c_junglesapling;
 130
 131                 actionstream <<"A " << (is_jungle_tree ? "jungle " : "")
 132                                 << "sapling grows into a tree at "
 133                                 << PP(p) << std::endl;
 134
 135                 std::map<v3s16, MapBlock*> modified_blocks;
 136                 v3s16 tree_p = p;
 137                 ManualMapVoxelManipulator vmanip(map);
 138                 v3s16 tree_blockp = getNodeBlockPos(tree_p);
 139                 vmanip.initialEmerge(tree_blockp - v3s16(1,1,1), tree_blockp + v3s16(1,1,1));
 140
 141                 if (is_jungle_tree) {
 142                         treegen::make_jungletree(vmanip, tree_p, ndef, myrand());
 143                 } else {
 144                         bool is_apple_tree = myrand() % 4 == 0;
 145                         treegen::make_tree(vmanip, tree_p, is_apple_tree, ndef, myrand());
 146                 }
 147
 148                 vmanip.blitBackAll(&modified_blocks);
 149
 150                 // update lighting
 151                 std::map<v3s16, MapBlock*> lighting_modified_blocks;
 152                 lighting_modified_blocks.insert(modified_blocks.begin(), modified_blocks.end());
 153                 map->updateLighting(lighting_modified_blocks, modified_blocks);
 154
 155                 // Send a MEET_OTHER event
 156                 MapEditEvent event;
 157                 event.type = MEET_OTHER;
 158 //              event.modified_blocks.insert(modified_blocks.begin(), modified_blocks.end());
 159                 for(std::map<v3s16, MapBlock*>::iterator
 160                         i = modified_blocks.begin();
 161                         i != modified_blocks.end(); ++i)
 162                 {
 163                         event.modified_blocks.insert(i->first);
 164                 }
 165                 map->dispatchEvent(&event);
 166         }
 167 };
 168
 169 class LiquidFlowABM : public ActiveBlockModifier
 170 {
 171 private:
 172         std::set<std::string> contents;
 173
 174 public:
 175         LiquidFlowABM(ServerEnvironment *env, INodeDefManager *nodemgr)
 176         {
 177                 std::set<content_t> liquids;
 178                 nodemgr->getIds("group:liquid", liquids);
 179                 for(std::set<content_t>::const_iterator k = liquids.begin(); k != liquids.end(); k++)
 180                         contents.insert(nodemgr->get(*k).liquid_alternative_flowing);
 181
 182         }
 183         virtual std::set<std::string> getTriggerContents()
 184         {
 185                 return contents;
 186         }
 187         virtual float getTriggerInterval()
 188         { return 10.0; }
 189         virtual u32 getTriggerChance()
 190         { return 10; }
 191         virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n)
 192         {
 193                 ServerMap *map = &env->getServerMap();
 194                 if (map->transforming_liquid_size() > 500)
 195                         return;
 196                 map->transforming_liquid_add(p);
 197                 //if ((*map).m_transforming_liquid.size() < 500) (*map).m_transforming_liquid.push_back(p);
 198         }
 199 };
 200
 201 class LiquidDropABM : public ActiveBlockModifier
 202 {
 203 private:
 204         std::set<std::string> contents;
 205
 206 public:
 207         LiquidDropABM(ServerEnvironment *env, INodeDefManager *nodemgr)
 208         {
 209                 std::set<content_t> liquids;
 210                 nodemgr->getIds("group:liquid", liquids);
 211                 for(std::set<content_t>::const_iterator k = liquids.begin(); k != liquids.end(); k++)
 212                         contents.insert(nodemgr->get(*k).liquid_alternative_source);
 213         }
 214         virtual std::set<std::string> getTriggerContents()
 215         { return contents; }
 216         virtual std::set<std::string> getRequiredNeighbors()
 217         {
 218                 std::set<std::string> neighbors;
 219                 neighbors.insert("mapgen_air");
 220                 return neighbors;
 221         }
 222         virtual float getTriggerInterval()
 223         { return 20.0; }
 224         virtual u32 getTriggerChance()
 225         { return 10; }
 226         virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n)
 227         {
 228                 ServerMap *map = &env->getServerMap();
 229                 if (map->transforming_liquid_size() > 500)
 230                         return;
 231                 if (       map->getNodeNoEx(p - v3s16(0,  1, 0 )).getContent() != CONTENT_AIR  // below
 232                         && map->getNodeNoEx(p - v3s16(1,  0, 0 )).getContent() != CONTENT_AIR  // right
 233                         && map->getNodeNoEx(p - v3s16(-1, 0, 0 )).getContent() != CONTENT_AIR  // left
 234                         && map->getNodeNoEx(p - v3s16(0,  0, 1 )).getContent() != CONTENT_AIR  // back
 235                         && map->getNodeNoEx(p - v3s16(0,  0, -1)).getContent() != CONTENT_AIR  // front
 236                 )
 237                         return;
 238                 map->transforming_liquid_add(p);
 239         }
 240 };
 241
 242 void add_legacy_abms(ServerEnvironment *env, INodeDefManager *nodedef)
 243 {
 244         env->addActiveBlockModifier(new GrowGrassABM());
 245         env->addActiveBlockModifier(new RemoveGrassABM());
 246         env->addActiveBlockModifier(new MakeTreesFromSaplingsABM(env, nodedef));
 247         if (g_settings->getBool("liquid_finite")) {
 248                 env->addActiveBlockModifier(new LiquidFlowABM(env, nodedef));
 249                 env->addActiveBlockModifier(new LiquidDropABM(env, nodedef));
 250         }
 251 }