Tempest Game

Diff: TempestEngine/TempestEngine.cpp

Revision:

10:2ae9d4145410

Parent:

9:759b419fec3b

Child:

12:1f1907ebebeb

--- a/TempestEngine/TempestEngine.cpp	Tue May 26 07:26:13 2020 +0000
+++ b/TempestEngine/TempestEngine.cpp	Tue May 26 16:31:22 2020 +0000
@@ -8,13 +8,16 @@
     
 }
 
-
+//initialises all the speeds, score, lives, and the hero
 void TempestEngine::init() {
     _hero.init(0);
     _alienspeed = 6;
+    _score = 0;
+    _herolives = 3;
+    _shooting_speed = 5
     }
     
-
+//draws all the elemnts
 void TempestEngine::draw(N5110 &lcd) {
     _board.draw(lcd);
     
@@ -25,47 +28,116 @@
     draw_bullets(lcd);
     
     draw_aliens(lcd);
-    }
+    display_score(lcd);
+    display_lives(lcd);
+}
     
-    
+ //reads the input from the gamepad   
 void TempestEngine::read_input(Gamepad &pad) {
     _d = pad.get_angle();
-    _mag = pad.get_mag();
     _a = pad.A_pressed();  
 }
 
 
+//updates all the objects and members
 void TempestEngine::update() {
-    _hero.update(_d, _mag);
+    _hero.update(_d);
+    create_aliens();
+    update_aliens();
     create_bullets();
     update_bullets();
     
-    create_aliens();
-    update_aliens();
+    check_alien_bullet_colision();
+    game_over();
+}
+
+//sets the gamover flag to 1 when there are no lives left
+int TempestEngine::game_over() {
+    if (_herolives == 0) {
+        return 1;
+    }   else {
+        return 0;
+    }
+}
+
+//displays the amount of lives with three hearts
+void TempestEngine::display_lives(N5110 &lcd) {
+    
+    //heart sprite made with an array
+    int heart_sprite[9][9] = { {0,1,1,0,0,0,1,1,0}, {1,1,1,1,0,1,1,1,1}, {1,1,1,1,1,1,1,1,1}, {1,1,1,1,1,1,1,1,1}, {1,1,1,1,1,1,1,1,1}, {0,1,1,1,1,1,1,1,0}, {0,0,1,1,1,1,1,0,0}, {0,0,0,1,1,1,0,0,0}, {0,0,0,0,1,0,0,0,0} };
+    
+    //displays the amount of hearts corresponding to the amount of lives left
+    if (_herolives == 3) {
+        lcd.drawSprite(6, 34, 9, 9, (int*)heart_sprite);
+        lcd.drawSprite(6, 18, 9, 9, (int*)heart_sprite);
+        lcd.drawSprite(6, 3, 9, 9, (int*)heart_sprite);
+        
+    } else if (_herolives == 2) {
+        lcd.drawSprite(6, 34, 9, 9, (int*)heart_sprite);
+        lcd.drawSprite(6, 18, 9, 9, (int*)heart_sprite);
+        
+    } else if (_herolives == 1) {
+        lcd.drawSprite(6, 34, 9, 9, (int*)heart_sprite);
+        
+    }
+}
+
+//displays the current score
+void TempestEngine::display_score(N5110 &lcd) {
+    char buffer[2];
+    sprintf(buffer, "%2d", _score);
+    lcd.printString(buffer,71,3);
 }
 
 
-
-
-
+void TempestEngine::check_alien_bullet_colision() {
+    
+    //iterates throught the alien vector
+    for (int i = 0; i< alien_vect.size(); i++) {
+        
+        //gets the current alien column and position in the column
+        Vector2D alien_pos = alien_vect[i].getcolumnpos();
+        
+        //iterates through the bullet vector
+        for (int j = 0; j< bullet_vect.size(); j++) {
+            
+            //gets the current bullet position
+            Vector2D bullet_pos = bullet_vect[j].getcolumnpos();
+            
+            //removes the bullet and the alien if they are on the same position
+            if ( (alien_pos.x == bullet_pos.x) && (alien_pos.y <= bullet_pos.y) ) {
+                alien_vect.erase(alien_vect.begin() + i);
+                bullet_vect.erase(bullet_vect.begin() + j);
+                _score++;
+            }
+        }
+    }
+} 
 
 
 
 
 ////////////////////////////////////////////////////////////BULLET BEHAVIOR/////////////////////////////
 void TempestEngine::create_bullets() {
-    if (_bullet_timer <= 0) {
+    
+    //bullet countdown timer to prevent spam of bullets
+    if (_bullet_countdown <= 0) {
+        
+        //checks if A button is pressed
         if (_a) {
+            
+            //creates new bullet object and adds it to the bullet vector. 
             Bullet new_bullet;
             
             new_bullet.init(_hero.get_column());
             
             bullet_vect.push_back(new_bullet);
             
-            _bullet_timer = 2;  
+            //reset antispam counter
+            _bullet_countdown = _shooting_speed;  
         }
     }  
-    _bullet_timer--;
+    _bullet_countdown--;
 }
 
 
@@ -80,11 +152,14 @@
 
 
 void TempestEngine::update_bullets() {
+    
+    //iterates through the bullets
     for (int i =0; i< bullet_vect.size(); i++) {
         bullet_vect[i].update();
         
         //checks if bullet needs to be deleted
         if (bullet_vect[i].checkdelete()) {
+            //removes the bullet from the vector 
             bullet_vect.erase(bullet_vect.begin() + i);
         }
     }  
@@ -96,15 +171,18 @@
 ///////////////////////////////////////////////////////////////ALIEN BEHAVIOR//////////////////////////////
 
 void TempestEngine::create_aliens() {
+    //alien countdown timer to limit the amount of aliens on screen
     if (_alien_timer <= 0) {
         
+        //creates new alien object and adds it to the alien vector. 
         Alien new_alien;
             
         new_alien.init((rand() % 12), _alienspeed);
             
         alien_vect.push_back(new_alien);
-            
-        _alien_timer = (rand() % 10) + 10;  
+        
+        //randomises the alien spawn time
+        _alien_timer = (rand() % 20) + 15;  
         
     }  
     _alien_timer--;
@@ -122,12 +200,18 @@
 
 
 void TempestEngine::update_aliens() {
+    
+    //iterates through the all the aliens and updates them
     for (int i =0; i< alien_vect.size(); i++) {
         alien_vect[i].update();
         
-        //checks if alien needs to be deleted
+        //checks if alien needs to be deleted at the top of the board
         if (alien_vect[i].checkdelete()) {
+            
+            //removes the alien from the vector and removes a life
             alien_vect.erase(alien_vect.begin() + i);
+            _herolives--;
         }
     }  
-} 
\ No newline at end of file
+} 
+