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     DPF(0, "World Created");
  69 }
  70
  71 void game::clean()
  72 {
  73     effect::clean();
  74
  75     creator::clean();
  76
  77     delete creating_Polygon;
  78     delete paused;
  79     delete running;
  80 }
  81
  82 void game::handleInput()
  83 {
  84     creator::handleInput();
  85
  86     int last = active_States.size() -1;
  87
  88     if(active_States[last] != running && running->pushMe())
  89     {
  90         push_State = running;
  91     }
  92
  93     if(active_States[last] != paused && paused->pushMe())
  94     {
  95         push_State = paused;
  96     }
  97
  98     if(active_States[last] != creating_Polygon && creating_Polygon->pushMe())
  99     {
 100         push_State = creating_Polygon;
 101     }
 102
 103
 104     for( int i = 0;
 105          i <= last;
 106          i++ )
 107     {
 108         if( i == last )
 109         {
 110             if(active_States[i]->popMe())
 111                 pop_State = true;
 112             else
 113                 active_States[i]->handleInput(true);
 114         }
 115         else
 116             active_States[i]->handleInput(false);
 117     }
 118 }
 119
 120 void game::update(float time_step)
 121 {
 122     if(pop_State)
 123     {
 124         active_States.pop_back();
 125         pop_State = false;
 126     }
 127
 128     if(push_State != NULL)
 129     {
 130         active_States.push_back(push_State);
 131         push_State = NULL;
 132     }
 133
 134     int last = active_States.size() -1;
 135     for( int i = 0;
 136          i <= last;
 137          i++ )
 138     {
 139         if( i == last )
 140             active_States[i]->update(time_step, true);
 141         else
 142             active_States[i]->update(time_step, false);
 143     }
 144 }
 145
 146 void game::draw()
 147 {
 148     int last = active_States.size() -1;
 149     for( int i = 0;
 150          i <= last;
 151          i++ )
 152     {
 153         if( i == last )
 154             active_States[i]->draw(true);
 155         else
 156             active_States[i]->draw(false);
 157     }
 158 }