Diff: GameEngine/GameEngine.cpp

Revision:

14:4356797fd16e

Parent:

13:4fa0d5148216

--- a/GameEngine/GameEngine.cpp	Sun May 24 15:08:31 2020 +0000
+++ b/GameEngine/GameEngine.cpp	Sun May 24 15:27:53 2020 +0000
@@ -12,29 +12,34 @@
 
 void GameEngine::init(int head_size, int head_speed) 
 {
+    //initial random coordinates for mouse spawn
     srand(time(NULL));
-     _mouse_x = rand() %WIDTH+2;
-     _mouse_y = rand() %HEIGHT+2;
+     _mouse_x = rand() %80+4;
+     _mouse_y = rand() %44+4;
+     //initialise parameters
     _game_over = false;
     _score = 0;
     _mouse = 0;
     _length = 0;
     _head_size = head_size;
     _head_speed = head_speed;
-    
+    //initialise the head
     head.init(_head_size, _head_speed);
     
 }
 
 void GameEngine::read_input(Gamepad& pad) 
 {
+    //read direction from joystick
     _d = pad.get_direction();
 }
 
 void GameEngine::update(Gamepad &pad, N5110 &lcd) 
 {
     head.change_direction(_d);
+    //need to make sure the current head position is stored before updating as this then becomes the previous head position for updating the snake tail
     Vector2D prevHead = head.get_pos();
+    //tail updated before head 
     tail.update(prevHead, _length);
     head.update();
     check_mouse_eaten(pad);
@@ -52,12 +57,8 @@
 
 void GameEngine::spawn_mouse(N5110 &lcd) 
 {
-    //create random x and y coordinates for mouse
-    //printf("mouse x = %i\n", _mouse_x);
-    //printf("mouse y = %i\n", _mouse_y);
-    lcd.drawRect(_mouse_x, _mouse_y, 2, 2, FILL_BLACK);
-    
-        
+    // draw the mouse from given x and y coordinates
+    lcd.drawRect(_mouse_x, _mouse_y, 2, 2, FILL_BLACK);        
 }
 
 void GameEngine::check_mouse_eaten(Gamepad &pad)
@@ -67,14 +68,14 @@
     int headY = headPos.y;
     //printf("head x = %i\n", headX);
     //printf("head y = %i\n", headY);
-    
+    //check if the head position is the same as the mouse position, if it is score increases by ten and new mouse coordinates generated
     if((headX == _mouse_x || headX == _mouse_x+1 || headX == _mouse_x-1) && (headY == _mouse_y || (headY == _mouse_y+1 || headY == _mouse_y-1))) {
         _score = _score + 10;
         _mouse = 0;
         pad.tone(750.0, 0.1);
         srand(time(NULL));
-     _mouse_x = rand() %WIDTH+2;
-     _mouse_y = rand() %HEIGHT+2;
+     _mouse_x = rand() %80+4;
+     _mouse_y = rand() %44+4;
      _length++;
     }
 }
@@ -84,7 +85,7 @@
     Vector2D headPos = head.get_pos();
     int headX = headPos.x;
     int headY = headPos.y;
-    
+    // checks if the snake head has it the wall, if it has then the game over function is run 
     if (headX < 0+2 || headX > WIDTH-3) {
         _game_over = true;
         game_over(lcd, pad);
@@ -97,8 +98,6 @@
 
 void GameEngine::game_over(N5110 &lcd, Gamepad &pad) 
 {
-    
-    
     pad.tone(NOTE_E5, 0.1);
     wait(0.1);
     pad.tone(NOTE_D5, 0.1);