src/game.cpp

   1 /*
   2  *  Copyright (C) 2008 Patrik Gornicz, Gornicz_P (at) hotmail (dot) com.
   3  *
   4  *  This program is free software: you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation, either version 3 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "game.h"
  19 #include "debug.h"
  20
  21 #include <vector>
  22 using std::vector;
  23
  24 #include "entityCreator.h"
  25 #include "effectManager.h"
  26
  27 #include "GameStates/GameState.h"
  28 #include "GameStates/Running.h"
  29 #include "GameStates/Paused.h"
  30 #include "GameStates/CreatingPolygon.h"
  31
  32
  33 /// ***** Private Variables *****
  34
  35 // The stack of active game states
  36 vector<GameState*> active_States;
  37
  38 // Pointers to each possible game state
  39 // inserted and removed from the active_States
  40 Running* running;
  41 Paused* paused;
  42 CreatingPolygon* creating_Polygon;
  43
  44 // true if the top state requested itself to be poped
  45 bool pop_State;
  46 // pointer to a state wishing to be added
  47 GameState* push_State;
  48
  49
  50 /// ***** Public Methods *****
  51
  52 void game::init()
  53 {
  54     running = new Running();
  55     paused = new Paused();
  56     creating_Polygon = new CreatingPolygon();
  57
  58     pop_State = false;
  59     push_State = NULL;
  60
  61     // create starting entities
  62     creator::init();
  63
  64     active_States.push_back(running);
  65
  66     effect::init();
  67
  68 #ifdef DEBUGGING
  69     cout << "World Created" << endl;
  70 #endif
  71 }
  72
  73 void game::clean()
  74 {
  75     effect::clean();
  76
  77     creator::clean();
  78
  79     delete creating_Polygon;
  80     delete paused;
  81     delete running;
  82 }
  83
  84 void game::handleInput()
  85 {
  86     creator::handleInput();
  87
  88
  89     if(running->pushMe())
  90         push_State = running;
  91
  92     if(paused->pushMe())
  93         push_State = paused;
  94
  95     if(creating_Polygon->pushMe())
  96         push_State = creating_Polygon;
  97
  98
  99     int last = active_States.size() -1;
 100     for( int i = 0;
 101          i <= last;
 102          i++ )
 103     {
 104         if( i == last )
 105         {
 106             if(active_States[i]->popMe())
 107                 pop_State = true;
 108             else
 109                 active_States[i]->handleInput(true);
 110         }
 111         else
 112             active_States[i]->handleInput(false);
 113     }
 114 }
 115
 116 void game::update(float time_step)
 117 {
 118     if(push_State != NULL)
 119     {
 120         // don't want to pop and push same state, pop wins arbitrary
 121         if(!pop_State)
 122             active_States.push_back(push_State);
 123
 124         push_State = NULL;
 125     }
 126
 127     if(pop_State)
 128     {
 129         active_States.pop_back();
 130         pop_State = false;
 131     }
 132
 133     int last = active_States.size() -1;
 134     for( int i = 0;
 135          i <= last;
 136          i++ )
 137     {
 138         if( i == last )
 139             active_States[i]->update(time_step, true);
 140         else
 141             active_States[i]->update(time_step, false);
 142     }
 143 }
 144
 145 void game::draw()
 146 {
 147     int last = active_States.size() -1;
 148     for( int i = 0;
 149          i <= last;
 150          i++ )
 151     {
 152         if( i == last )
 153             active_States[i]->draw(true);
 154         else
 155             active_States[i]->draw(false);
 156     }
 157 }