Implement killing zombos

src/Arrow.hpp

@@ -18,6 +18,8 @@ public:
 	void draw(const GameRenderer *renderer, const Sprite &sprite, double player_x, double player_y) const;
 
 	void update();
+
+	bool operator==(const Arrow &other) const = default;
 };
 
 #endif

src/Game.cpp

@@ -25,6 +25,7 @@ void Game::update(std::stop_token stop_token)
 			arrow.update();
 		}
 
+		// Remove arrows that are out of bounds
 		std::erase_if(arrows, [this](const Arrow &arrow) {
 			if (arrow.x < map.tile_offset_x * map.tile_size || arrow.y < map.tile_offset_x * map.tile_size) {
 				return true;
@@ -42,6 +43,19 @@ void Game::update(std::stop_token stop_token)
 
 		for (Zombo &zombo : zombos) {
 			zombo.update(player.x, player.y);
+
+			// Check collision between zombos and arrows
+			for (Arrow &arrow : arrows) {
+				if (
+					arrow.x > zombo.x && arrow.x < zombo.x + zombo_sprite->width &&
+					arrow.y > zombo.y && arrow.y < zombo.y + zombo_sprite->height
+				) {
+					std::erase(arrows, arrow);
+
+					zombo.hp--;
+					if (zombo.hp == 0) std::erase(zombos, zombo);
+				}
+			}
 		}
 
 		if (ticks % 100 == 0 && zombos.size() < 20) {

src/Zombo.hpp

@@ -6,18 +6,20 @@
 
 class Zombo
 {
-private:
+public:
 	double x;
 	double y;
+	int hp = 3;
 
 	static constexpr double speed = 0.5;
 
-public:
 	Zombo(const GameRenderer *renderer, const Sprite &sprite, double player_x, double player_y);
 
 	void update(double player_x, double player_y);
 
 	void draw(const GameRenderer *renderer, const Sprite &sprite, double player_x, double player_y) const;
+
+	bool operator==(const Zombo &other) const = default;
 };
 
 #endif