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
  87     if(running->pushMe())
  88         push_State = running;
  89
  90     if(paused->pushMe())
  91         push_State = paused;
  92
  93     if(creating_Polygon->pushMe())
  94         push_State = creating_Polygon;
  95
  96
  97     int last = active_States.size() -1;
  98     for( int i = 0;
  99          i <= last;
 100          i++ )
 101     {
 102         if( i == last )
 103         {
 104             if(active_States[i]->popMe())
 105                 pop_State = true;
 106             else
 107                 active_States[i]->handleInput(true);
 108         }
 109         else
 110             active_States[i]->handleInput(false);
 111     }
 112 }
 113
 114 void game::update(float time_step)
 115 {
 116     if(push_State != NULL)
 117     {
 118         // don't want to pop and push same state, pop wins arbitrary
 119         if(!pop_State)
 120             active_States.push_back(push_State);
 121
 122         push_State = NULL;
 123     }
 124
 125     if(pop_State)
 126     {
 127         active_States.pop_back();
 128         pop_State = false;
 129     }
 130
 131     int last = active_States.size() -1;
 132     for( int i = 0;
 133          i <= last;
 134          i++ )
 135     {
 136         if( i == last )
 137             active_States[i]->update(time_step, true);
 138         else
 139             active_States[i]->update(time_step, false);
 140     }
 141 }
 142
 143 void game::draw()
 144 {
 145     int last = active_States.size() -1;
 146     for( int i = 0;
 147          i <= last;
 148          i++ )
 149     {
 150         if( i == last )
 151             active_States[i]->draw(true);
 152         else
 153             active_States[i]->draw(false);
 154     }
 155 }