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                 if(ndef->get(n_top).light_propagates &&
  55                                 !ndef->get(n_top).isLiquid() &&
  56                                 n_top.getLightBlend(env->getDayNightRatio(), ndef) >= 13)
  57                 {
  58                         n.setContent(ndef->getId("mapgen_dirt_with_grass"));
  59                         map->addNodeWithEvent(p, n);
  60                 }
  61         }
  62 };
  63
  64 class RemoveGrassABM : public ActiveBlockModifier
  65 {
  66 private:
  67 public:
  68         virtual std::set<std::string> getTriggerContents()
  69         {
  70                 std::set<std::string> s;
  71                 s.insert("mapgen_dirt_with_grass");
  72                 return s;
  73         }
  74         virtual float getTriggerInterval()
  75         { return 2.0; }
  76         virtual u32 getTriggerChance()
  77         { return 20; }
  78         virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n)
  79         {
  80                 INodeDefManager *ndef = env->getGameDef()->ndef();
  81                 ServerMap *map = &env->getServerMap();
  82
  83                 MapNode n_top = map->getNodeNoEx(p+v3s16(0,1,0));
  84                 if((!ndef->get(n_top).light_propagates &&
  85                                 n_top.getContent() != CONTENT_IGNORE) ||
  86                                 ndef->get(n_top).isLiquid())
  87                 {
  88                         n.setContent(ndef->getId("mapgen_dirt"));
  89                         map->addNodeWithEvent(p, n);
  90                 }
  91         }
  92 };
  93
  94 class MakeTreesFromSaplingsABM : public ActiveBlockModifier
  95 {
  96 private:
  97 public:
  98         virtual std::set<std::string> getTriggerContents()
  99         {
 100                 std::set<std::string> s;
 101                 s.insert("sapling");
 102                 return s;
 103         }
 104         virtual float getTriggerInterval()
 105         { return 10.0; }
 106         virtual u32 getTriggerChance()
 107         { return 50; }
 108         virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n,
 109                         u32 active_object_count, u32 active_object_count_wider)
 110         {
 111                 INodeDefManager *ndef = env->getGameDef()->ndef();
 112                 ServerMap *map = &env->getServerMap();
 113
 114                 actionstream<<"A sapling grows into a tree at "
 115                                 <<PP(p)<<std::endl;
 116
 117                 core::map<v3s16, MapBlock*> modified_blocks;
 118                 v3s16 tree_p = p;
 119                 ManualMapVoxelManipulator vmanip(map);
 120                 v3s16 tree_blockp = getNodeBlockPos(tree_p);
 121                 vmanip.initialEmerge(tree_blockp - v3s16(1,1,1), tree_blockp + v3s16(1,1,1));
 122                 bool is_apple_tree = myrand()%4 == 0;
 123                 treegen::make_tree(vmanip, tree_p, is_apple_tree, ndef, myrand());
 124                 vmanip.blitBackAll(&modified_blocks);
 125
 126                 // update lighting
 127                 core::map<v3s16, MapBlock*> lighting_modified_blocks;
 128                 for(core::map<v3s16, MapBlock*>::Iterator
 129                         i = modified_blocks.getIterator();
 130                         i.atEnd() == false; i++)
 131                 {
 132                         lighting_modified_blocks.insert(i.getNode()->getKey(), i.getNode()->getValue());
 133                 }
 134                 map->updateLighting(lighting_modified_blocks, modified_blocks);
 135
 136                 // Send a MEET_OTHER event
 137                 MapEditEvent event;
 138                 event.type = MEET_OTHER;
 139                 for(core::map<v3s16, MapBlock*>::Iterator
 140                         i = modified_blocks.getIterator();
 141                         i.atEnd() == false; i++)
 142                 {
 143                         v3s16 p = i.getNode()->getKey();
 144                         event.modified_blocks.insert(p, true);
 145                 }
 146                 map->dispatchEvent(&event);
 147         }
 148 };
 149
 150 class LiquidFlowABM : public ActiveBlockModifier
 151 {
 152 private:
 153         std::set<std::string> contents;
 154
 155 public:
 156         LiquidFlowABM(ServerEnvironment *env, INodeDefManager *nodemgr)
 157         {
 158                 std::set<content_t> liquids;
 159                 nodemgr->getIds("group:liquid", liquids);
 160                 for(std::set<content_t>::const_iterator k = liquids.begin(); k != liquids.end(); k++)
 161                         contents.insert(nodemgr->get(*k).liquid_alternative_flowing);
 162
 163         }
 164         virtual std::set<std::string> getTriggerContents()
 165         {
 166                 return contents;
 167         }
 168         virtual float getTriggerInterval()
 169         { return 10.0; }
 170         virtual u32 getTriggerChance()
 171         { return 10; }
 172         virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n)
 173         {
 174                 ServerMap *map = &env->getServerMap();
 175                 if (map->transforming_liquid_size() < 500)
 176                         map->transforming_liquid_add(p);
 177                 //if ((*map).m_transforming_liquid.size() < 500) (*map).m_transforming_liquid.push_back(p);
 178         }
 179 };
 180
 181 void add_legacy_abms(ServerEnvironment *env, INodeDefManager *nodedef)
 182 {
 183         env->addActiveBlockModifier(new GrowGrassABM());
 184         env->addActiveBlockModifier(new RemoveGrassABM());
 185         env->addActiveBlockModifier(new MakeTreesFromSaplingsABM());
 186         if (g_settings->getBool("liquid_finite"))
 187                 env->addActiveBlockModifier(new LiquidFlowABM(env, nodedef));
 188 }