src/environment.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010 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 General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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 "environment.h"
  21 #include "main.h" // g_device for timing debug
  22
  23 Environment::Environment(Map *map, std::ostream &dout):
  24                 m_dout(dout)
  25 {
  26         m_map = map;
  27         m_daynight_ratio = 0.2;
  28 }
  29
  30 Environment::~Environment()
  31 {
  32         // Deallocate players
  33         for(core::list<Player*>::Iterator i = m_players.begin();
  34                         i != m_players.end(); i++)
  35         {
  36                 delete (*i);
  37         }
  38
  39         // The map is removed by the SceneManager
  40         m_map->drop();
  41         //delete m_map;
  42 }
  43
  44 void Environment::step(float dtime)
  45 {
  46         DSTACK(__FUNCTION_NAME);
  47         /*
  48                 Run Map's timers
  49         */
  50         //TimeTaker maptimerupdatetimer("m_map->timerUpdate()", g_device);
  51         // 0ms
  52         m_map->timerUpdate(dtime);
  53         //maptimerupdatetimer.stop();
  54
  55         /*
  56                 Get the highest speed some player is going
  57         */
  58         //TimeTaker playerspeed("playerspeed", g_device);
  59         // 0ms
  60         f32 maximum_player_speed = 0.001; // just some small value
  61         for(core::list<Player*>::Iterator i = m_players.begin();
  62                         i != m_players.end(); i++)
  63         {
  64                 f32 speed = (*i)->getSpeed().getLength();
  65                 if(speed > maximum_player_speed)
  66                         maximum_player_speed = speed;
  67         }
  68         //playerspeed.stop();
  69
  70         // Maximum time increment (for collision detection etc)
  71         // Allow 0.1 blocks per increment
  72         // time = distance / speed
  73         f32 dtime_max_increment = 0.1*BS / maximum_player_speed;
  74         // Maximum time increment is 10ms or lower
  75         if(dtime_max_increment > 0.01)
  76                 dtime_max_increment = 0.01;
  77
  78         //TimeTaker playerupdate("playerupdate", g_device);
  79
  80         /*
  81                 Stuff that has a maximum time increment
  82         */
  83         // Don't allow overly huge dtime
  84         if(dtime > 0.5)
  85                 dtime = 0.5;
  86
  87         u32 loopcount = 0;
  88         do
  89         {
  90                 loopcount++;
  91
  92                 f32 dtime_part;
  93                 if(dtime > dtime_max_increment)
  94                         dtime_part = dtime_max_increment;
  95                 else
  96                         dtime_part = dtime;
  97                 dtime -= dtime_part;
  98
  99                 /*
 100                         Handle players
 101                 */
 102                 for(core::list<Player*>::Iterator i = m_players.begin();
 103                                 i != m_players.end(); i++)
 104                 {
 105                         Player *player = *i;
 106
 107                         v3f playerpos = player->getPosition();
 108
 109                         // Apply physics to local player
 110                         if(player->isLocal())
 111                         {
 112                                 // Apply gravity to local player
 113                                 v3f speed = player->getSpeed();
 114                                 speed.Y -= 9.81 * BS * dtime_part * 2;
 115
 116                                 /*
 117                                         Apply water resistance
 118                                 */
 119                                 if(player->in_water)
 120                                 {
 121                                         f32 max_down = 1.0*BS;
 122                                         if(speed.Y < -max_down) speed.Y = -max_down;
 123
 124                                         f32 max = 2.0*BS;
 125                                         if(speed.getLength() > max)
 126                                         {
 127                                                 speed = speed / speed.getLength() * max;
 128                                         }
 129                                 }
 130
 131                                 player->setSpeed(speed);
 132                         }
 133
 134                         /*
 135                                 Move the player.
 136                                 For local player, this also calculates collision detection.
 137                         */
 138                         player->move(dtime_part, *m_map);
 139
 140                         /*
 141                                 Update lighting on remote players on client
 142                         */
 143                         u8 light = LIGHT_MAX;
 144                         try{
 145                                 // Get node at feet
 146                                 v3s16 p = floatToInt(playerpos + v3f(0,BS/4,0));
 147                                 MapNode n = m_map->getNode(p);
 148                                 light = n.getLightBlend(m_daynight_ratio);
 149                         }
 150                         catch(InvalidPositionException &e) {}
 151                         player->updateLight(light);
 152
 153                         /*
 154                                 Add footsteps to grass
 155                         */
 156                         // Get node that is at BS/4 under player
 157                         v3s16 bottompos = floatToInt(playerpos + v3f(0,-BS/4,0));
 158                         try{
 159                                 MapNode n = m_map->getNode(bottompos);
 160                                 if(n.d == CONTENT_GRASS)
 161                                 {
 162                                         n.d = CONTENT_GRASS_FOOTSTEPS;
 163                                         m_map->setNode(bottompos, n);
 164 #ifndef SERVER
 165                                         // Update mesh on client
 166                                         if(m_map->mapType() == MAPTYPE_CLIENT)
 167                                         {
 168                                                 v3s16 p_blocks = getNodeBlockPos(bottompos);
 169                                                 MapBlock *b = m_map->getBlockNoCreate(p_blocks);
 170                                                 b->updateMesh(m_daynight_ratio);
 171                                         }
 172 #endif
 173                                 }
 174                         }
 175                         catch(InvalidPositionException &e)
 176                         {
 177                         }
 178                 }
 179         }
 180         while(dtime > 0.001);
 181
 182         //std::cout<<"Looped "<<loopcount<<" times."<<std::endl;
 183 }
 184
 185 Map & Environment::getMap()
 186 {
 187         return *m_map;
 188 }
 189
 190 void Environment::addPlayer(Player *player)
 191 {
 192         DSTACK(__FUNCTION_NAME);
 193         //Check that only one local player exists and peer_ids are unique
 194 #ifndef SERVER
 195         assert(player->isLocal() == false || getLocalPlayer() == NULL);
 196 #endif
 197         assert(getPlayer(player->peer_id) == NULL);
 198         m_players.push_back(player);
 199 }
 200
 201 void Environment::removePlayer(u16 peer_id)
 202 {
 203         DSTACK(__FUNCTION_NAME);
 204 re_search:
 205         for(core::list<Player*>::Iterator i = m_players.begin();
 206                         i != m_players.end(); i++)
 207         {
 208                 Player *player = *i;
 209                 if(player->peer_id != peer_id)
 210                         continue;
 211
 212                 delete player;
 213                 m_players.erase(i);
 214                 // See if there is an another one
 215                 // (shouldn't be, but just to be sure)
 216                 goto re_search;
 217         }
 218 }
 219
 220 #ifndef SERVER
 221 LocalPlayer * Environment::getLocalPlayer()
 222 {
 223         for(core::list<Player*>::Iterator i = m_players.begin();
 224                         i != m_players.end(); i++)
 225         {
 226                 Player *player = *i;
 227                 if(player->isLocal())
 228                         return (LocalPlayer*)player;
 229         }
 230         return NULL;
 231 }
 232 #endif
 233
 234 Player * Environment::getPlayer(u16 peer_id)
 235 {
 236         for(core::list<Player*>::Iterator i = m_players.begin();
 237                         i != m_players.end(); i++)
 238         {
 239                 Player *player = *i;
 240                 if(player->peer_id == peer_id)
 241                         return player;
 242         }
 243         return NULL;
 244 }
 245
 246 core::list<Player*> Environment::getPlayers()
 247 {
 248         return m_players;
 249 }
 250
 251 void Environment::printPlayers(std::ostream &o)
 252 {
 253         o<<"Players in environment:"<<std::endl;
 254         for(core::list<Player*>::Iterator i = m_players.begin();
 255                         i != m_players.end(); i++)
 256         {
 257                 Player *player = *i;
 258                 o<<"Player peer_id="<<player->peer_id<<std::endl;
 259         }
 260 }
 261
 262 #ifndef SERVER
 263 void Environment::updateMeshes(v3s16 blockpos)
 264 {
 265         m_map->updateMeshes(blockpos, m_daynight_ratio);
 266 }
 267
 268 void Environment::expireMeshes(bool only_daynight_diffed)
 269 {
 270         m_map->expireMeshes(only_daynight_diffed);
 271 }
 272 #endif
 273
 274 void Environment::setDayNightRatio(u32 r)
 275 {
 276         m_daynight_ratio = r;
 277 }
 278
 279 u32 Environment::getDayNightRatio()
 280 {
 281         return m_daynight_ratio;
 282 }
 283