source: orxonox.OLD/trunk/src/util/multiplayer_team_deathmatch.cc @ 9726

/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

### File Specific:
   main-programmer: Patrick Boenzli
*/

#define DEBUG_MODULE_GAME_RULES

#include <map>

#include "multiplayer_team_deathmatch.h"

#include "util/loading/load_param.h"
#include "util/loading/factory.h"

#include "render2D/image_plane.h"
#include "state.h"
#include "class_list.h"

#include "player.h"
#include "playable.h"
#include "space_ships/space_ship.h"


#include "shared_network_data.h"
#include "terrain.h"
#include "class_list.h"
#include "space_ships/space_ship.h"

#include "network_game_manager.h"

#include "event_handler.h"

#include "glgui.h"

#include "story_entity.h"

#include "shell_command.h"

#include "spawning_point.h"





CREATE_FACTORY(MultiplayerTeamDeathmatch, CL_MULTIPLAYER_TEAM_DEATHMATCH);


/**
 * constructor
 */
MultiplayerTeamDeathmatch::MultiplayerTeamDeathmatch(const TiXmlElement* root)
  : NetworkGameRules(root)
{
  this->setClassID(CL_MULTIPLAYER_TEAM_DEATHMATCH, "MultiplayerTeamDeathmatch");

  this->bLocalPlayerDead = false;
  this->deathTimeout = 10.0f;     // 5 seconds
  this->timeout = 0.0f;
  this->numTeams = 2;
  this->currentGameState = GAMESTATE_PRE_GAME;
  this->gameStateTimer = 3.0f;
  this->bShowTeamChange = false;

  this->box = NULL;
  this->table = NULL;
  this->statsBox = NULL;

  this->localPlayer = State::getPlayer();

  if( root != NULL)
    this->loadParams(root);

  subscribeEvent( ES_GAME, SDLK_o );
  subscribeEvent( ES_GAME, SDLK_TAB );
  subscribeEvent( ES_GAME, SDLK_F1 );
  subscribeEvent( ES_MENU, KeyMapper::PEV_FIRE1 );

  this->input = new OrxGui::GLGuiInputLine();
  this->input->setAbsCoor2D(180, 5);
  this->input->enterPushed.connect(this, &MultiplayerTeamDeathmatch::onInputEnter);
}

/**
 * decontsructor
 */
MultiplayerTeamDeathmatch::~MultiplayerTeamDeathmatch()
{
  unsubscribeEvent( ES_GAME, SDLK_o );
  unsubscribeEvent( ES_GAME, SDLK_TAB );
  unsubscribeEvent( ES_GAME, SDLK_F1 );
  unsubscribeEvent( ES_MENU, KeyMapper::PEV_FIRE1 );

  if ( this->input )
  {
    delete this->input;
    this->input = NULL;
  }
}



void MultiplayerTeamDeathmatch::loadParams(const TiXmlElement* root)
{
  GameRules::loadParams(root) ;

  LoadParam(root, "death-penalty-timeout", this, MultiplayerTeamDeathmatch, setDeathPenaltyTimeout)
      .describe("sets the time in seconds a player has to wait for respawn");

  LoadParam(root, "max-kills", this, MultiplayerTeamDeathmatch, setMaxKills)
      .describe("sets the maximal kills for winning condition");

  LoadParam(root, "num-teams", this, MultiplayerTeamDeathmatch, setNumTeams)
      .describe("sets number of teams");

}


/**
 * time tick
 * @param dt time
 */
void MultiplayerTeamDeathmatch::tick(float dt)
{
  tickStatsTable();
  //on client side hostId is -1 until hanshake finished
  if ( SharedNetworkData::getInstance()->getHostID() < 0 )
    return;

  if ( currentGameState == GAMESTATE_PRE_GAME || currentGameState == GAMESTATE_GAME )
  {
    if ( PlayerStats::getStats( SharedNetworkData::getInstance()->getHostID() ) &&
         box == NULL &&
         (PlayerStats::getStats( SharedNetworkData::getInstance()->getHostID() )->getPreferedTeamId() == TEAM_NOTEAM || bShowTeamChange )

       )
    {
      EventHandler::getInstance()->pushState( ES_MENU );

      OrxGui::GLGuiHandler::getInstance()->activateCursor();

      box = new OrxGui::GLGuiBox();
      box->setAbsCoor2D( 300, 100 );

      if( SharedNetworkData::getInstance()->isClient() ||  SharedNetworkData::getInstance()->isProxyServerActive())
      {
        OrxGui::GLGuiPushButton * buttonSpectator = new OrxGui::GLGuiPushButton("Spectator");
        box->pack( buttonSpectator );
        buttonSpectator->released.connect(this, &MultiplayerTeamDeathmatch::onButtonSpectator);

        OrxGui::GLGuiPushButton * buttonRandom = new OrxGui::GLGuiPushButton("Random");
        box->pack( buttonRandom );
        buttonRandom->released.connect(this, &MultiplayerTeamDeathmatch::onButtonRandom);

        OrxGui::GLGuiPushButton * buttonTeam0 = new OrxGui::GLGuiPushButton("Blue Team");
        box->pack( buttonTeam0 );
        buttonTeam0->released.connect(this, &MultiplayerTeamDeathmatch::onButtonTeam0);

        OrxGui::GLGuiPushButton * buttonTeam1 = new OrxGui::GLGuiPushButton("Red Team");
        box->pack( buttonTeam1 );
        buttonTeam1->released.connect(this, &MultiplayerTeamDeathmatch::onButtonTeam1);
      }
      else
      {
        OrxGui::GLGuiText* text = new OrxGui::GLGuiText();
        text->setText("Server Mode: not able to play at this node");
        box->pack( text);
      }


      if ( bShowTeamChange )
      {
        OrxGui::GLGuiPushButton * buttonCancel = new OrxGui::GLGuiPushButton("Cancel");
        box->pack( buttonCancel );
        buttonCancel->released.connect(this, &MultiplayerTeamDeathmatch::onButtonCancel);
      }

      OrxGui::GLGuiPushButton * buttonExit = new OrxGui::GLGuiPushButton("Exit");
      box->pack( buttonExit );
      buttonExit->released.connect(this, &MultiplayerTeamDeathmatch::onButtonExit);

      box->showAll();
    }
  }

//   if( PlayerStats::getStats( SharedNetworkData::getInstance()->getHostID() ) )
//   {
//     PRINTF(0)("prefered team id: %i, noteam: %i\n", PlayerStats::getStats( SharedNetworkData::getInstance()->getHostID() )->getPreferedTeamId(), TEAM_NOTEAM);
//   }

  // check if the menu should be removed and the game state should be entered
  if ( box != NULL &&
       PlayerStats::getStats( SharedNetworkData::getInstance()->getHostID() ) &&
       PlayerStats::getStats( SharedNetworkData::getInstance()->getHostID() )->getPreferedTeamId() != TEAM_NOTEAM &&
       !bShowTeamChange
     )
  {
    delete box;
    box = NULL;

    OrxGui::GLGuiHandler::getInstance()->deactivateCursor( true );

    EventHandler::getInstance()->popState();
  }

  if ( box != NULL )
  {
    OrxGui::GLGuiHandler::getInstance()->tick( dt );
  }

  assignPlayable();

  if ( SharedNetworkData::getInstance()->isClient() || SharedNetworkData::getInstance()->isProxyServerActive())
    return;

  //handle kills
  while ( this->killList.begin() != this->killList.end() )
  {
    PRINTF(0)("KKKKKKKKIIIIIIIIILLLLLLLLLLLLL\n");
    onKill( this->killList.begin()->getVictim(), this->killList.begin()->getKiller() );
    this->killList.erase( this->killList.begin() );
  }



  gameStateTimer -= dt;
  //PRINTF(0)("TICK %f\n", gameStateTimer);

  if ( currentGameState != GAMESTATE_GAME && gameStateTimer < 0 )
    nextGameState();

  this->currentGameState = NetworkGameManager::getInstance()->getGameState();

  if ( currentGameState == GAMESTATE_GAME )
  {
    handleTeamChanges();
  }

  this->calculateTeamScore();

  this->checkGameRules();

  // is the local player dead and inactive
  if( unlikely(this->bLocalPlayerDead))
  {
    this->timeout += dt;
    PRINTF(0)("TICK DEATH: %f of %f\n", this->timeout, this->deathTimeout);
    // long enough dead?
    if( this->timeout >= this->deathTimeout)
    {
      this->timeout = 0.0f;
      // respawn
      PRINTF(0)("RESPAWN\n");
      (State::getPlayer())->getPlayable()->respawn();
    }
  }
}


/**
 * draws the stuff
 */
void MultiplayerTeamDeathmatch::draw()
{
  if( unlikely( this->bLocalPlayerDead))
  {

  }
}


/**
 * check the game rules for consistency
 */
void MultiplayerTeamDeathmatch::checkGameRules()
{
  if ( SharedNetworkData::getInstance()->isClient() || SharedNetworkData::getInstance()->isProxyServerActive())
    return;

  // check for max killing count
  for ( int i = 0; i<numTeams; i++ )
  {
    if ( teamScore[i] >= maxKills )
    {
      nextGameState();
    }
  }
}

/**
 * find group for new player
 * @return group id
 */
int MultiplayerTeamDeathmatch::getTeamForNewUser()
{
  return TEAM_NOTEAM;
}

ClassID MultiplayerTeamDeathmatch::getPlayableClassId( int userId, int team )
{
  if ( team == TEAM_NOTEAM || team == TEAM_SPECTATOR )
    return CL_SPECTATOR;

  if ( team == 0 || team == 1 )
    return CL_TURBINE_HOVER;

  assert( false );
}


std::string MultiplayerTeamDeathmatch::getPlayableModelFileName( int userId, int team, ClassID classId )
{
  if (classId == CL_TURBINE_HOVER)
   return "models/ships/hoverglider_mainbody.obj";
  if ( team == 0 )
    return "models/creatures/doom_guy.md2";
  else if ( team == 1 )
    return "models/creatures/male.md2";
  else
    return "";
}

std::string MultiplayerTeamDeathmatch::getPlayableModelTextureFileName( int userId, int team, ClassID classId )
{
  if ( classId == CL_FPS_PLAYER )
  {
    if ( team == 0 )
      return "maps/doom_guy.png";
    else
      return "maps/male_fiend.pcx";
  }

  return "";
}

float MultiplayerTeamDeathmatch::getPlayableScale( int userId, int team, ClassID classId )
{
  if ( classId == CL_FPS_PLAYER )
  {
    return 10.0f;
  }

  return 1.0f;
}

/**
 * calculate team score
 */
void MultiplayerTeamDeathmatch::calculateTeamScore( )
{
  teamScore.clear();

  for ( int i = 0; i<numTeams; i++ )
    teamScore[i] = 0;


  const std::list<BaseObject*> * list = ClassList::getList( CL_PLAYER_STATS );

  if ( !list )
    return;

  for ( std::list<BaseObject*>::const_iterator it = list->begin(); it != list->end(); it++ )
  {
    PlayerStats & stats = *dynamic_cast<PlayerStats*>(*it);

    if ( stats.getTeamId() >= 0 )
    {
      teamScore[stats.getTeamId()] += stats.getScore();
    }
  }
}

/**
 * get team for player who choose to join random team
 * @return smallest team
 */
int MultiplayerTeamDeathmatch::getRandomTeam( )
{
  std::map<int,int> playersInTeam;

  for ( int i = 0; i<numTeams; i++ )
    playersInTeam[i] = 0;

  const std::list<BaseObject*> * list = ClassList::getList( CL_PLAYER_STATS );

  if ( !list )
    return 0;

  for ( std::list<BaseObject*>::const_iterator it = list->begin(); it != list->end(); it++ )
  {
    PlayerStats & stats = *dynamic_cast<PlayerStats*>(*it);

    if ( stats.getTeamId() >= 0 )
    {
      playersInTeam[stats.getTeamId()]++;
    }
  }


  int minPlayers = 0xFFFF;
  int minTeam = -1;

  for ( int i = 0; i<numTeams; i++ )
  {
    if ( playersInTeam[i] < minPlayers )
    {
      minTeam = i;
      minPlayers = playersInTeam[i];
    }
  }

  assert( minTeam != -1 );

  return minTeam;
}

void MultiplayerTeamDeathmatch::nextGameState( )
{
  if ( currentGameState == GAMESTATE_PRE_GAME )
  {
    NetworkGameManager::getInstance()->setGameState( GAMESTATE_GAME );

    return;
  }

  if ( currentGameState == GAMESTATE_GAME )
  {
    NetworkGameManager::getInstance()->setGameState( GAMESTATE_POST_GAME );

    return;
  }

  if ( currentGameState == GAMESTATE_POST_GAME )
  {
    //State::getCurrentStoryEntity()->stop();
    this->bShowTeamChange = false;

    return;
  }
}

/**
 *  this handles team changes but only on the master server
 */
void MultiplayerTeamDeathmatch::handleTeamChanges( )
{
  const std::list<BaseObject*> * list = ClassList::getList( CL_PLAYER_STATS );

  if ( !list )
    return;

  //first server players with choices
  for ( std::list<BaseObject*>::const_iterator it = list->begin(); it != list->end(); it++ )
  {
    PlayerStats & stats = *dynamic_cast<PlayerStats*>(*it);

    if ( stats.getTeamId() != stats.getPreferedTeamId() )
    {
      if ( stats.getPreferedTeamId() == TEAM_SPECTATOR || ( stats.getPreferedTeamId() >= 0 && stats.getPreferedTeamId() < numTeams ) )
      {
        teamChange( stats.getAssignedUserId() );
      }
    }
  }

  //now serve player who want join a random team
  for ( std::list<BaseObject*>::const_iterator it = list->begin(); it != list->end(); it++ )
  {
    PlayerStats & stats = *dynamic_cast<PlayerStats*>(*it);

    if ( stats.getTeamId() != stats.getPreferedTeamId() )
    {
      if ( stats.getPreferedTeamId() == TEAM_RANDOM )
      {
        stats.setPreferedTeamId( getRandomTeam() );
        teamChange( stats.getAssignedUserId() );
      }
    }
  }
}



/**
 * changes the team
 * @param userId the user changing team (userId)
 */
void MultiplayerTeamDeathmatch::teamChange( int userId )
{
  assert( PlayerStats::getStats( userId ) );
  PlayerStats & stats = *(PlayerStats::getStats( userId ));

  stats.setTeamId( stats.getPreferedTeamId() );

  Playable * oldPlayable = stats.getPlayable();


  ClassID       playableClassId  = getPlayableClassId( userId, stats.getPreferedTeamId() );
  std::string   playableModel    = getPlayableModelFileName( userId, stats.getPreferedTeamId(), playableClassId );
  std::string   playableTexture  = getPlayableModelTextureFileName( userId, stats.getPreferedTeamId(), playableClassId );
  float         playableScale    = getPlayableScale( userId, stats.getPreferedTeamId(), playableClassId );

  BaseObject * bo = Factory::fabricate( playableClassId );

  assert( bo != NULL );
  assert( bo->isA( CL_PLAYABLE ) );

  Playable & playable = *(dynamic_cast<Playable*>(bo));

  playable.loadMD2Texture( playableTexture );
  playable.loadModel( playableModel, playableScale );
  playable.setOwner( userId );
  playable.setUniqueID( SharedNetworkData::getInstance()->getNewUniqueID() );
  playable.setSynchronized( true );

  stats.setPlayableClassId( playableClassId );
  stats.setPlayableUniqueId( playable.getUniqueID() );
  stats.setModelFileName( playableModel );
  stats.setTeamId( stats.getPreferedTeamId() );

  playable.setTeam(stats.getPreferedTeamId());


  this->respawnPlayable( &playable, stats.getPreferedTeamId(), 0.0f );

  if ( oldPlayable )
  {
    delete oldPlayable;
  }
}


void MultiplayerTeamDeathmatch::onButtonExit( )
{
  State::getCurrentStoryEntity()->stop();
  this->bShowTeamChange = false;
}

void MultiplayerTeamDeathmatch::onButtonRandom( )
{
  NetworkGameManager::getInstance()->prefereTeam( TEAM_RANDOM );
  this->bShowTeamChange = false;
}

void MultiplayerTeamDeathmatch::onButtonTeam0( )
{
  NetworkGameManager::getInstance()->prefereTeam( 0 );
  this->bShowTeamChange = false;
}

void MultiplayerTeamDeathmatch::onButtonTeam1( )
{
  NetworkGameManager::getInstance()->prefereTeam( 1 );
  this->bShowTeamChange = false;
}

void MultiplayerTeamDeathmatch::onButtonSpectator( )
{
  NetworkGameManager::getInstance()->prefereTeam( TEAM_SPECTATOR );
  this->bShowTeamChange = false;
}

void MultiplayerTeamDeathmatch::assignPlayable( )
{
  if ( PlayerStats::getStats( SharedNetworkData::getInstance()->getHostID() ) )
    PlayerStats::getStats( SharedNetworkData::getInstance()->getHostID() )->getPlayable();
}


/**
 * function that processes events from the handler
 * @param event: the event
 * @todo replace SDLK_o with something from KeyMapper
 */
void MultiplayerTeamDeathmatch::process( const Event & event )
{
  if ( event.type == SDLK_o )
  {
    if ( event.bPressed )
      this->bShowTeamChange = true;
  } else if ( event.type == SDLK_F1 )
  {
    if ( this->statsBox && !this->bLocalPlayerDead && event.bPressed )
    {
      PRINTF(5)("hide stats\n");
      this->hideStats();
    }
    else if ( !this->statsBox && event.bPressed )
    {
      PRINTF(5)("show stats\n");
      this->showStats();
    }
  }
  else if ( event.type == SDLK_TAB )
  {
    if ( currentGameState == GAMESTATE_GAME && event.bPressed && !EventHandler::getInstance()->isPressed( SDLK_RALT ) && !EventHandler::getInstance()->isPressed( SDLK_LALT ) )
    {
      EventHandler::getInstance()->pushState( ES_MENU );
      OrxGui::GLGuiHandler::getInstance()->activateCursor();
      OrxGui::GLGuiHandler::getInstance()->deactivateCursor();
      input->show();
      input->giveMouseFocus();
      input->setText("say ");
    }
  }
  else if ( this->bLocalPlayerDead && statsBox && event.type == KeyMapper::PEV_FIRE1 )
  {
    this->hideStats();
  }
}

void MultiplayerTeamDeathmatch::onButtonCancel( )
{
  this->bShowTeamChange = false;
}



/**
 * this method is called by NetworkGameManger when he recieved a chat message
 * @param userId senders user id
 * @param message message string
 * @param messageType some int
 */
void MultiplayerTeamDeathmatch::handleChatMessage( int userId, const std::string & message, int messageType )
{
  std::string name = "unknown";

  if ( PlayerStats::getStats( userId ) )
  {
    name = PlayerStats::getStats( userId )->getNickName();
  }

  PRINTF(0)("CHATMESSAGE %s (%d): %s\n", name.c_str(), userId, message.c_str() );
  State::getPlayer()->hud().notifyUser(name + ": " + message);
}

void MultiplayerTeamDeathmatch::onInputEnter( const std::string & text )
{
  EventHandler::getInstance()->popState();
  input->breakMouseFocus();
  input->hide();
  input->setText("");

  std::string command = text;

  //HACK insert " in say commands so user doesn't have to type them
  if ( command.length() >= 4 && command[0] == 's' && command[1] == 'a' && command[2] == 'y' && command[3] == ' ' )
  {
    command.insert( 4, "\"" );
    command = command + "\"";
  }

  OrxShell::ShellCommand::execute( command );
}

/**
 * show table with frags
 */
void MultiplayerTeamDeathmatch::showStats( )
{
  statsBox = new OrxGui::GLGuiBox();
  statsBox->setAbsCoor2D( 100, 100 );

  this->table = new OrxGui::GLGuiTable(10,5);

  statsBox->pack( this->table );

  statsBox->showAll();
}

/**
 * hide table with frags
 */
void MultiplayerTeamDeathmatch::hideStats( )
{
    if ( statsBox )
    {
      delete statsBox;
      statsBox = NULL;
    }
}

/**
 * fill stats table with values
 */
void MultiplayerTeamDeathmatch::tickStatsTable( )
{
  if ( !this->statsBox )
    return;

  std::vector<std::string> headers;
  headers.push_back("Blue Team");
  headers.push_back("");
  headers.push_back("");
  headers.push_back("Red Team");
  headers.push_back("");
  this->table->setHeader(headers);

  ScoreList scoreList = PlayerStats::getScoreList();

  char st[10];
  int i = 0;

  i = 2;
  for ( TeamScoreList::const_iterator it = scoreList[0].begin(); it != scoreList[0].end(); it++ )
  {
    this->table->setEntry( i, 0, it->name );
    snprintf( st, 10, "%d", it->score );
    this->table->setEntry( i, 1, st );
    this->table->setEntry( i, 2, "" );
    i++;
  }

  i = 2;
  for ( TeamScoreList::const_iterator it = scoreList[1].begin(); it != scoreList[1].end(); it++ )
  {
    this->table->setEntry( i, 3, it->name );
    snprintf( st, 10, "%d", it->score );
    this->table->setEntry( i, 4, st );
    i++;
  }

}

/**
 * this function is called when a player kills another one or himself
 * @param killedUserId
 * @param userId
 */
void MultiplayerTeamDeathmatch::onKill( WorldEntity * victim, WorldEntity * killer )
{
  if ( !victim )
  {
    PRINTF(0)("victim == NULL\n");
    return;
  }
  if ( !killer )
  {
    PRINTF(0)("killer == NULL\n");
    return;
  }

  int killerUserId = killer->getOwner();
  int victimUserId = victim->getOwner();

  PRINTF(0)("%d %d %x %x %s %s\n", killerUserId, victimUserId, killer, victim, killer->getClassCName(), victim->getClassCName());

  PlayerStats & victimStats = *PlayerStats::getStats( victimUserId );
  PlayerStats & killerStats = *PlayerStats::getStats( killerUserId );

  if ( killerStats.getPlayable() == NULL || victimStats.getPlayable() == NULL)
  {
    PRINTF(0)("killerStats.getPlayable() != NULL || victimStats.getPlayable() != NULL\n");
    PRINTF(0)("%x %x %x %x\n", killerStats.getPlayable(), killer, victimStats.getPlayable(), victim );
    PRINTF(0)("%d %d %d %d\n", killerStats.getPlayable()->getUniqueID(), killer->getUniqueID(), victimStats.getPlayable()->getUniqueID(), victim->getUniqueID() );
    return;
  }

  //check for suicide
  if ( killerUserId != victimUserId )
  {
    //check for teamkill
    if ( victimStats.getTeamId() != killerStats.getTeamId() )
    {
      killerStats.setScore( killerStats.getScore() + 1 );
    }
    else
    {
      killerStats.setScore( killerStats.getScore() - 1 );
    }
  }
  else
    killerStats.setScore( killerStats.getScore() - 1 );

  if ( victimUserId == SharedNetworkData::getInstance()->getHostID() )
  {
    this->bLocalPlayerDead = true;
    this->showStats();
  }

  this->respawnPlayable( victimStats.getPlayable(), victimStats.getTeamId(), 3.0f );
}

/**
 * this function is called on player respawn
 * @param userId
 */
void MultiplayerTeamDeathmatch::onRespawn( int userId )
{
  if ( userId == SharedNetworkData::getInstance()->getHostID() )
  {
    this->bLocalPlayerDead = false;
    this->hideStats();
  }
}

/**
 * this function is called on player respawn
 * @param we
 */
void MultiplayerTeamDeathmatch::registerSpawn( WorldEntity * we )
{
  onRespawn( we->getOwner() );
}


/**
 * respawns a playable in the world via spawning points
 * @param playable the playable to respawn
 * @param teamId the teamId to use
 * @param delay time delay for delayed spawning
 */
void MultiplayerTeamDeathmatch::respawnPlayable( Playable * playable, int teamId, float delay )
{
  const std::list<BaseObject*> * list = ClassList::getList( CL_SPAWNING_POINT );

  assert( list );

  std::vector<SpawningPoint*> spList;

  for ( std::list<BaseObject*>::const_iterator it = list->begin(); it != list->end(); it++ )
  {
    SpawningPoint * sp = dynamic_cast<SpawningPoint*>(*it);

    if ( sp->getTeamId() == teamId )
      spList.push_back( sp );
  }

  if ( spList.size() == 0 )
  {
    for ( std::list<BaseObject*>::const_iterator it = list->begin(); it != list->end(); it++ )
    {
      SpawningPoint * sp = dynamic_cast<SpawningPoint*>(*it);

      if ( sp->getTeamId() < 0 )
        spList.push_back( sp );
    }
  }

  assert( spList.size() != 0 );

  int n = (int)((float)spList.size() * (float)rand()/(float)RAND_MAX);

  spList[n]->pushEntity( playable, delay );
}