Diff: SpaceEngine/SpaceEngine.cpp

Revision:

149:bd0f37008f5a

Parent:

148:83e5a4dedffd

--- a/SpaceEngine/SpaceEngine.cpp	Thu May 09 12:09:59 2019 +0000
+++ b/SpaceEngine/SpaceEngine.cpp	Thu May 09 14:13:43 2019 +0000
@@ -8,59 +8,55 @@
 }
 
 
-
+// this function to initalise the objects of SpaceEngine class.
 void SpaceEngine::init(int x_spaceship,int y_spaceship, int x_bullet, int y_bullet,int fired_bullet, int x_alien,int y_alien, int speed_alien, int speed_bullet, int speed_spaceship)
 {
-
-    _x_spaceship=x_spaceship; //represents the x-cooridante of the spaceship.
-    _y_spaceship=y_spaceship; //represents the y-cooridante of the spaceship.
+    _x_spaceship=x_spaceship; // represents the x-cooridante of the spaceship.
+    _y_spaceship=y_spaceship; // represents the y-cooridante of the spaceship.
     _speed_spaceship=speed_spaceship; // speed of the spaceship.
-    _x_bullet=x_bullet; //represents the x-cooridante of the spaceship.
-    _y_bullet=y_bullet; //represents the y-cooridante of the spaceship.
+    _x_bullet=x_bullet;  // represents the x-cooridante of the spaceship.
+    _y_bullet=y_bullet;  // represents the y-cooridante of the spaceship.
     _fired_bullet= fired_bullet;  // spaceship fired the alien by relaseing the bullet.
-    _x_alien= x_alien;  //represents the x-cooridante of the alien.
-    _y_alien= y_alien;  //represents the y-cooridante of the spaceship.
-    _speed_alien= speed_alien; // speed of the alien.
+    _x_alien= x_alien;  // represents the x-cooridante of the alien.
+    _y_alien= y_alien;  // represents the y-cooridante of the spaceship.
+    _speed_alien= speed_alien;  // speed of the alien.
     _speed_bullet=speed_bullet; // speed of the bullet.
 
-    _bullet.init(_x_bullet, _y_bullet, speed_bullet,fired_bullet); //initalise the object bullet.
-    _alien.init (_x_alien, _y_alien,_speed_alien);  //initalise the object  alien.
-    _spaceship.init( _x_spaceship, _y_spaceship, _speed_spaceship);  //initalise the object  spaceship.
+    _bullet.init(_x_bullet, _y_bullet, speed_bullet,fired_bullet); // initalise the object bullet.
+    _alien.init (_x_alien, _y_alien,_speed_alien);  // initalise the object  alien.
+    _spaceship.init( _x_spaceship, _y_spaceship, _speed_spaceship);  // initalise the object  spaceship.
     _alien_killed = 0;  // set the killed alien at 0.
 }
 
 // void function for Gamepad library to read the position of the objects.
 void SpaceEngine::read_input(Gamepad &pad)
 {
-
     _d = pad.get_direction();
     _mag = pad.get_mag();
 }
+
 /**this function draw the objects on the screen
 *by using the (N5110 &lcd) libraries
 * if statment to check if the alien is alive so the lcd can draw it on the screen
 * else if statment will check if the alien dead so it should disappear
 *also it draws the spaceship
 */
-
 void  SpaceEngine::draw(N5110 &lcd)
 {
     _bullet.draw(lcd);
-
     if (_alien.isAlive() == true) {
         _alien.draw(lcd);
+        // printf("alien is alive\n")
     } else { // alien is dead
         int y_pos = (rand() % 30) + 10; // random number 10 to 39
-        _alien.init(70,y_pos,1);
-        wait(0.2);
+        _alien.init(70,y_pos,1);  //initalise the alien with its parameters.
+        wait(0.2);//wait 0.2 sec
     }
-
     _spaceship.draw(lcd);
     lcd.printString("alien_killed",0,0);
     char kills[14];
     sprintf(kills,"%2d",_alien_killed);
     lcd.printString(kills,70,0);
-
 }
 
 /*
@@ -78,8 +74,9 @@
     _y_bullet = _bullet.get_pos_y();
     _x_bullet = _bullet.get_pos_x();
     if(_d==E) {
-        _fired_bullet=1;  
-       // printf("bullet fired alien\n")
+        _fired_bullet=1;
+        pad.tone(1000.0,0.1);
+        // printf("bullet fired alien\n")
         _bullet.set_pos(_spaceship.get_pos_x()+33, _spaceship.get_pos_y());
     }
 }
@@ -90,14 +87,12 @@
 *than y-corrdindate of the alien-5 and y_alien+15 is larger or equal y_bullet
 *then the alien gets killed.
 */
-
 void SpaceEngine::check_space_collision(Gamepad &pad)
 {
-
     if(_x_bullet >= 65 && _x_bullet <= 68 && _y_bullet >= _y_alien-5 && _y_bullet <= _y_alien+15) {
         _alien.setAlive(false);
-         // printf("alive alien false\n")
+        // printf("alive alien false\n")
         _alien_killed++;
+        // printf(" killed alien incremebt by 1\n")
     }
-
 }
\ No newline at end of file