Add zombies

Makefile

@@ -3,6 +3,7 @@ OBJS= \
 	build/src/Map.o \
 	build/src/Game.o \
 	build/src/Arrow.o \
+	build/src/Zombo.o \
 	build/src/Player.o \
 	build/src/GameRenderer.o
 

src/Game.cpp

@@ -18,12 +18,22 @@ void Game::update(std::stop_token stop_token)
     while (!stop_token.stop_requested()) {
         game_mutex.lock();
 
+        ticks++;
+
         player.update();
 
         for (Arrow *arrow : arrows) {
             arrow->update();
         }
 
+        for (Zombo *zombo : zombos) {
+            zombo->update(player.x, player.y);
+        }
+
+        if (ticks % 1000 == 0) {
+            zombos.push_back(new Zombo(&renderer, 20.0, 20.0));
+        }
+
         renderer.redraw();
 
         map.check_bounds(player.x, player.y);

src/Game.hpp

@@ -7,6 +7,7 @@
 #include "GameRenderer.hpp"
 #include "Player.hpp"
 #include "Map.hpp"
+#include "Zombo.hpp"
 
 class Game
 {
@@ -15,9 +16,11 @@ private:
     Player player;
     Map map;
     std::vector<Arrow*> arrows;
+    std::vector<Zombo*> zombos;
 
     std::jthread update_thread;
     std::mutex game_mutex;
+    unsigned int ticks = 0;
 
     void update(std::stop_token stop_token);
 

src/Zombo.cpp

@@ -0,0 +1,29 @@
+#include "Zombo.hpp"
+
+Zombo::Zombo(GameRenderer *renderer, const double x, const double y) : renderer(renderer), x(x), y(y)
+{
+    sprite = renderer->load_sprite("./assets/zombo.png", 40, 40);
+}
+
+void Zombo::update(const double player_x, const double player_y)
+{
+    double x_vel = 0, y_vel = 0;
+
+    if (player_x > x) x_vel = speed;
+    else if (player_x < x) x_vel = -speed;
+
+    if (player_y > y) y_vel = speed;
+    else if (player_y < y) y_vel = -speed;
+
+    x += x_vel;
+    y += y_vel;
+}
+
+void Zombo::draw(const double player_x, const double player_y) const
+{
+    renderer->draw_sprite(
+        sprite,
+        (int)(x - sprite.width / 2 + renderer->screen_width / 2 - player_x),
+        (int)(y - sprite.height / 2 + renderer->screen_height / 2 - player_y)
+    );
+}

src/Zombo.hpp

@@ -0,0 +1,26 @@
+#ifndef ZOMBO_HPP
+#define ZOMBO_HPP
+
+#include "Sprite.hpp"
+#include "GameRenderer.hpp"
+
+class Zombo
+{
+private:
+    GameRenderer *renderer;
+    Sprite sprite;
+
+    double x;
+    double y;
+
+    static constexpr int speed = 3;
+
+public:
+    Zombo(GameRenderer *renderer, double x, double y);
+
+    void update(double player_x, double player_y);
+
+    void draw(double player_x, double player_y) const;
+};
+
+#endif