Diff: GameEngine/GameEngine.cpp

Revision:

1:00a4ea97c4cd

Child:

2:6dc7bc55c1cb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GameEngine/GameEngine.cpp	Mon May 07 21:24:25 2018 +0000
@@ -0,0 +1,142 @@
+#include "GameEngine.h"
+
+GameEngine::GameEngine()
+{
+
+}
+
+GameEngine::~GameEngine()
+{
+
+}
+
+void GameEngine::init(int bag_width,int bag_height,int coin_size,int speed)
+{
+    // initialise the game parameters
+    _bag_width = bag_width;
+    _bag_height = bag_height;
+    _coin_size = coin_size;
+    _speed = speed;
+
+    // y position on screen - HEIGHT is defined in N5110.h
+    _py = HEIGHT  - _bag_height;
+
+    // puts bag in middle
+    _bag.init(_py,_bag_height,_bag_width);
+    
+    // puts coin in random place
+    _coin.init(_coin_size,_speed);
+}
+
+void GameEngine::read_input(Gamepad &pad)
+{
+    // get the input information from Gamepad
+    _direction = pad.get_direction();
+    _mag = pad.get_mag();
+}
+
+void GameEngine::draw(N5110 &lcd)
+{
+    // draw the elements in the LCD buffer
+    // score
+    print_scores(lcd);
+    
+    // bag
+    _bag.draw(lcd);
+    
+    // coin
+    _coin.draw(lcd);
+}
+
+int GameEngine::update(Gamepad &pad)
+{
+    // the situation whether continue or end game, 1 stand for continue and 0 stand for game over
+    gameover = 1;
+    
+    // updating bag
+    _bag.update(_direction,_mag);
+    // updating coin
+    _coin.update();
+    
+    // case for adding score
+    check_bag_collisions(pad);
+    // case for ending game
+    game_over(pad);
+    
+    return gameover;
+}
+
+// add score case
+void GameEngine::check_bag_collisions(Gamepad &pad)
+{
+    // get current coin attributes
+    Vector2D coin_position = _coin.get_coin_position();
+    // get current bag attributes
+    Vector2D bag_position = _bag.get_bag_position();
+
+    // see if bag has caught the coin by checking for overlap of coin and bag
+      if  (
+        (coin_position.y + _coin_size -5<= _py + _bag_height) && //top
+        (coin_position.y + _coin_size -5>= _py) && //bottom
+        (coin_position.x  >= bag_position.x) && //left
+        (coin_position.x  <= bag_position.x + _bag_width)  //right
+        ){ 
+        // game continue and add score when "gameover" return 1
+        gameover = 1;
+        // adding score process
+        _bag.add_score();
+        
+        // reset a new coin
+        _coin.init(_coin_size,_speed);
+        
+        // audio feedback
+        pad.tone(1000.0,0.5);
+        pad.leds_on();
+        wait(0.1);
+        pad.leds_off();
+        } 
+}
+
+// gameover case
+void GameEngine::game_over(Gamepad &pad)
+{
+    // get current coin attributes
+    Vector2D coin_position = _coin.get_coin_position();
+    // get current bag attributes
+    Vector2D bag_position = _bag.get_bag_position();
+    
+    // see if coin fall away by checking for overlap of coin and bottom boundary
+     if (coin_position.y + _coin_size >= 48)
+     {
+        // game over when "gameover" return 0
+        gameover = 0;
+        
+        // audio feedback
+        pad.tone(1500.0,0.5);
+        pad.leds_on();
+        wait(0.5);
+        pad.leds_off();
+      }
+}
+
+void GameEngine::print_scores(N5110 &lcd)
+{
+    // get scores from bag
+    int score = _bag.get_score();
+    
+    // get highest scores from bag
+    int Hscore = _bag.get_Hscore();
+
+    // print to LCD
+    char buffer1[14];
+    char buffer2[14];
+    sprintf(buffer1,"%2d",score);
+    sprintf(buffer2,"%2d",Hscore);
+    
+    // current score is shown on right top corner
+    lcd.printString(buffer1,68,0); 
+    
+    // highest score is shown on right bottom corner
+    lcd.printString("HS:",68,4); 
+    lcd.printString(buffer2,68,5);
+}