Enemy functionality and hit detection working but not really tested and probably buggy and will probably stay that way LOL

Assignment3Project/Assignment3Project/bullet.cpp

@@ -21,6 +21,11 @@ Bullet::Bullet(Behavior _behavior) {
 void Bullet::reset_pos(float x, float y) {
 	x_pos = x;
 	y_pos = y;
+
+	hitbox.x = x_pos;
+	hitbox.y = y_pos;
+	hitbox.width = width;
+	hitbox.height = height;
 }
 
 void Bullet::draw() {

Assignment3Project/Assignment3Project/bullet.h

@@ -7,6 +7,7 @@ class Bullet : public GameElement {
 public:
 	Bullet(Behavior _behavior);
 
+	//implementing virtual
 	void reset_pos(float x, float y);
 	void draw();
 	void move(Direction dir);

Assignment3Project/Assignment3Project/enemies.txt

@@ -1 +1 @@
-n,10,240
+e,10,240

Assignment3Project/Assignment3Project/enums.h

@@ -28,4 +28,17 @@ enum Direction {
 enum Behavior {
 	Player,
 	Enemy
+};
+
+struct Hitbox {
+	int x;
+	int y;
+	int height;
+	int width;
+};
+
+struct NewEnemy {
+	int x;
+	Behavior e_type;
+	int when;
 };

Assignment3Project/Assignment3Project/game.cpp

@@ -12,6 +12,7 @@ void Game::init() {
 	score = 0;
 	state = Start;
 	sprites.insert(pair<string, ALLEGRO_BITMAP*>("Ship", al_load_bitmap("placeholder.bmp")));
+	sprites.insert(pair<string, ALLEGRO_BITMAP*>("Enemy", al_load_bitmap("enemy.bmp")));
 
 
 	al_reserve_samples(4);

Assignment3Project/Assignment3Project/game_element.h

@@ -15,6 +15,7 @@ public:
 	float width;
 	bool oob;
 	Behavior behavior;
+	Hitbox hitbox;
 
 	virtual void reset_pos(float x, float y) = 0;
 	virtual void move(Direction dir) = 0;

Assignment3Project/Assignment3Project/game_screen.cpp

@@ -6,6 +6,7 @@
 #include <vector>
 #include <string>
 #include <sstream>
+#include <fstream>
 #include <map>
 #include <ctime>
 
@@ -18,6 +19,8 @@
 using std::vector;
 using std::string;
 using std::ostringstream;
+using std::istringstream;
+using std::ifstream;
 using std::map;
 using std::pair;
 
@@ -42,13 +45,38 @@ void GameScreen::reset() {
 //If a sample needs to be played while it is still being played, it will be stopped first.
 //Admittedly this was a hack solution to the fact that my sound effect samples are too long. 
 //In future projects I will use a better program for sound effect creation that does not have a large minimum length for audio export.
-void play(ALLEGRO_SAMPLE_INSTANCE* x) {
+void GameScreen::play(ALLEGRO_SAMPLE_INSTANCE* x) {
 	if (al_get_sample_instance_playing(x)) {
 		al_stop_sample_instance(x);
 	}
 	al_play_sample_instance(x);
 }
 
+void GameScreen::build_enemy_queue() {
+	string line;
+	ifstream enemies_file("enemies.txt");
+
+	if (enemies_file.is_open()) {
+		while (getline(enemies_file, line)) {
+			NewEnemy next;
+			istringstream curr_line(line);
+			string element;
+			//Get enemy type (when there's other types of enemies I'll fix this)
+			getline(curr_line, element, ',');
+			next.e_type = Enemy; 
+			//Get appearance time
+			getline(curr_line, element, ',');
+			next.when = stoi(element);
+			//Get position
+			getline(curr_line, element, ',');
+			next.x = stoi(element);
+			enemy_q.push_back(next);
+		}
+	}
+
+	enemies_file.close();
+}
+
 void GameScreen::run(ALLEGRO_FONT* font) {
 	ALLEGRO_EVENT_QUEUE* event_queue = NULL;
 	event_queue = al_create_event_queue();
@@ -58,6 +86,11 @@ void GameScreen::run(ALLEGRO_FONT* font) {
 	timer = al_create_timer(1.0 / FPS);
 	al_register_event_source(event_queue, al_get_timer_event_source(timer));
 
+	build_enemy_queue();
+	bool more_enemies = true;
+	NewEnemy next_enemy = enemy_q.back();
+	enemy_q.pop_back();
+
 	//MapLoad((char*)"level.fmp", 1);
 
 	map_y = TILE_SIZE * LEVEL_LEN;
@@ -132,7 +165,22 @@ void GameScreen::run(ALLEGRO_FONT* font) {
 				next_state = Exit;
 			}
 
+			if (more_enemies && map_y >= next_enemy.when) {
+				Ship* new_e = new Ship(next_enemy.e_type);
+				new_e->set_sprite(sprites["Enemy"]);
+				new_e->reset_pos(next_enemy.x, 0 - new_e->height + 1);
+				objects.enemies.push_back(new_e);
+				if (enemy_q.size() > 0) {
+					next_enemy = enemy_q.back();
+					enemy_q.pop_back();
+				}
+				else {
+					more_enemies = false;
+				}
+			}
+						
 			//Global refresh
+			objects.move_enemies();
 			al_clear_to_color(al_map_rgb(0, 0, 0));
 			redraw(font);
 			al_flip_display();
@@ -216,6 +264,7 @@ void GameScreen::run(ALLEGRO_FONT* font) {
 
 	//Garbage collection
 	//MapFreeMem();
+	objects.destroy_objects();
 	al_destroy_event_queue(event_queue);
 	al_destroy_timer(timer);
 }

Assignment3Project/Assignment3Project/game_screen.h

@@ -21,6 +21,7 @@ public:
 
 	ObjectManager objects;
 	unsigned int max_bullets;
+	std::vector<NewEnemy> enemy_q;
 
 	GameScreen(std::map<std::string, ALLEGRO_BITMAP*> _sprites, std::map<std::string, ALLEGRO_SAMPLE*> _samples);
 
@@ -29,4 +30,7 @@ public:
 	void redraw(ALLEGRO_FONT* font);
 	void back();
 	void cont();
+private:
+	void play(ALLEGRO_SAMPLE_INSTANCE* x);
+	void build_enemy_queue();
 };

Assignment3Project/Assignment3Project/object_manager.cpp

@@ -2,6 +2,7 @@
 
 using std::vector;
 
+
 ObjectManager::ObjectManager() {
 
 }
@@ -11,17 +12,57 @@ void ObjectManager::initiate(Ship * _player) {
 }
 
 bool ObjectManager::chk_player_col() {
-	return false;
+	for (vector<Ship*>::iterator it = enemies.begin(); it != enemies.end(); it++) {
+		if (col_eval(player->hitbox, (*it)->hitbox)) {
+			return true;
+		}
+	}
 }
 
 int ObjectManager::chk_bullet_col() {
-	return 0;
+	int points = 0;
+	int i = 0;
+	vector<int> dead;
+	for (vector<Ship*>::iterator it = enemies.begin(); it != enemies.end(); it++) {
+		for (vector<Bullet*>::iterator it_b = player_bullets.begin(); it_b != player_bullets.end(); it++) {
+			if (col_eval((*it_b)->hitbox, (*it)->hitbox)) {
+				switch ((*it)->behavior) {
+				default:
+					points += 10;
+				}
+				delete *it;
+				dead.push_back(i);
+			}
+		}
+		i++;
+	}
+	//Removed backwards to avoid indexing errors
+	for (vector<int>::iterator it = dead.end(); it != dead.begin(); it--) {
+		enemies.erase(enemies.begin() + *it);
+	}
+	return points;
 }
 
 void ObjectManager::draw_objects()
 {
 	player->draw();
 
+	int i = 0;
+	vector<int> dead;
+	for (vector<Ship*>::iterator it = enemies.begin(); it != enemies.end(); it++) {
+		if (!(*it)->oob) {
+			(*it)->draw();
+		}
+		else {
+			dead.push_back(i);
+		}
+		i++;
+	}
+	//Removed backwards to avoid indexing errors
+	for (vector<int>::iterator it = dead.end(); it != dead.begin(); it--) {
+		enemies.erase(enemies.begin() + *it);
+	}
+
 	bool unload = false;
 	for (unsigned int i = 0; i < player_bullets.size(); i++) {
 		if (player_bullets.at(i)->oob) {
@@ -37,3 +78,33 @@ void ObjectManager::draw_objects()
 	}
 }
 
+void ObjectManager::destroy_objects() {
+	delete player;
+
+	for (vector<Ship*>::iterator it = enemies.begin(); it != enemies.end(); it++) {
+		delete *it;
+	}
+	enemies.clear();
+
+	for (vector<Bullet*>::iterator it = player_bullets.begin(); it != player_bullets.end(); it++) {
+		delete *it;
+	}
+	player_bullets.clear();
+
+	for (vector<Bullet*>::iterator it = enemy_bullets.begin(); it != enemy_bullets.end(); it++) {
+		delete *it;
+	}
+	enemy_bullets.clear();
+}
+
+void ObjectManager::move_enemies() {
+	for (vector<Ship*>::iterator it = enemies.begin(); it != enemies.end(); it++) {
+		(*it)->move(D);
+	}
+}
+
+bool ObjectManager::col_eval(Hitbox h1, Hitbox h2) {
+	if ((h1.x > h2.x && h1.x < (h2.x + h2.width)) && (h1.y > h2.y && h1.y < (h2.y + h2.height))) {
+		return true;
+	}
+}

Assignment3Project/Assignment3Project/object_manager.h

@@ -18,4 +18,9 @@ public:
 	bool chk_player_col();
 	int chk_bullet_col();
 	void draw_objects();
+	void destroy_objects();
+	void move_enemies();
+
+private:
+	bool col_eval(Hitbox h1, Hitbox h2);
 };

Assignment3Project/Assignment3Project/ship.cpp

@@ -6,24 +6,33 @@ Ship::Ship(Behavior _behavior) {
 		speed = 1.2;
 		height = 40;
 		width = 40;
+
+		l_bound = SCREEN_L_B;
+		r_bound = SCREEN_R_B;
+		h_bound = SCREEN_H;
 		break;
 	default:
-		speed = 1.0;
+		speed = 0.5;
 		height = 40;
 		width = 40;
-		break;
-	}
 
-	l_bound = SCREEN_L_B;
-	r_bound = SCREEN_R_B;
-	r_bound -= width;
-	h_bound = SCREEN_H;
-	h_bound -= height;
+		l_bound = SCREEN_L_B;
+		r_bound = SCREEN_R_B;
+		r_bound -= width;
+		h_bound = SCREEN_H;
+		h_bound -= height;
+		break;
+	}	
 }
 
 void Ship::reset_pos(float x, float y) {
 	x_pos = x;
 	y_pos = y;
+
+	hitbox.x = x_pos;
+	hitbox.y = y_pos;
+	hitbox.width = width;
+	hitbox.height = height;
 }
 
 void Ship::set_sprite(ALLEGRO_BITMAP* _sprite) {
@@ -31,7 +40,7 @@ void Ship::set_sprite(ALLEGRO_BITMAP* _sprite) {
 }
 
 void Ship::draw() {
-	al_draw_bitmap(sprite, x_pos, y_pos, NULL);
+	al_draw_bitmap(sprite, x_pos, y_pos, (behavior == Player) ? NULL : ALLEGRO_FLIP_VERTICAL);
 }
 
 void Ship::move(Direction dir) {
@@ -68,16 +77,28 @@ void Ship::move(Direction dir) {
 	}
 
 	if (x_pos <= l_bound) {
-		x_pos = l_bound;
+		if (behavior == Player) {
+			x_pos = l_bound;
+		}
+		else oob = true;
 	}
 	else if (x_pos >= r_bound) {
-		x_pos = r_bound;
+		if (behavior == Player) {
+			x_pos = r_bound;
+		}
+		else oob = true;
 	}
 	if (y_pos <= 0.0) {
-		y_pos = 0.0;
+		if (behavior == Player) {
+			y_pos = 0.0;
+		}
+		else oob = true;
 	}
 	else if (y_pos >= h_bound) {
-		y_pos = h_bound;
+		if (behavior == Player) {
+			y_pos = h_bound;
+		}
+		else oob = true;
 	}
 }
 

Assignment3Project/Assignment3Project/ship.h

@@ -12,9 +12,12 @@ public:
 	
 	Ship(Behavior _behavior);
 
+	//implementing virtual methods
 	void reset_pos(float x, float y);
-	void set_sprite(ALLEGRO_BITMAP* _sprite);
 	void draw();
 	void move(Direction dir);
+
+	//unique to object
+	void set_sprite(ALLEGRO_BITMAP* _sprite);
 	Bullet fire();
 };