attampt at adding zoom

assets/entities.json

@@ -0,0 +1,11 @@
+{
+  "ship": {
+    "destroyer": {
+        "texture": "assets/entities/ships/destroyer.svg",
+        "width": 58,
+        "height": 512,
+        "speed": 250
+      }
+    }
+  }
+  

src/color.h

@@ -0,0 +1,22 @@
+
+#ifndef RESET
+
+#define RESET   "\033[0m"
+#define BLACK   "\033[30m"      /* Black */
+#define RED     "\033[31m"      /* Red */
+#define GREEN   "\033[32m"      /* Green */
+#define YELLOW  "\033[33m"      /* Yellow */
+#define BLUE    "\033[34m"      /* Blue */
+#define MAGENTA "\033[35m"      /* Magenta */
+#define CYAN    "\033[36m"      /* Cyan */
+#define WHITE   "\033[37m"      /* White */
+#define BOLDBLACK   "\033[1m\033[30m"      /* Bold Black */
+#define BOLDRED     "\033[1m\033[31m"      /* Bold Red */
+#define BOLDGREEN   "\033[1m\033[32m"      /* Bold Green */
+#define BOLDYELLOW  "\033[1m\033[33m"      /* Bold Yellow */
+#define BOLDBLUE    "\033[1m\033[34m"      /* Bold Blue */
+#define BOLDMAGENTA "\033[1m\033[35m"      /* Bold Magenta */
+#define BOLDCYAN    "\033[1m\033[36m"      /* Bold Cyan */
+#define BOLDWHITE   "\033[1m\033[37m"      /* Bold White */
+
+#endif

src/const.hpp

@@ -0,0 +1,13 @@
+#include <SDL3/SDL_stdinc.h>
+
+#ifndef CONST_NS
+#define CONST_NS
+
+constexpr int SCREEN_WIDTH = 1600;
+constexpr int SCREEN_HEIGHT = 1200;
+constexpr int WORLD_WIDTH = 20000;
+constexpr int WORLD_HEIGHT = 200000;
+constexpr int TARGET_FPS = 60;
+constexpr Uint64 TARGET_FRAME_TIME_NS = 1'000'000'000 / TARGET_FPS;
+
+#endif

src/exitcleanup.cpp

@@ -0,0 +1,63 @@
+#include <errno.h>
+#include <csignal>
+#include "color.h"
+#include <iostream>
+#include "exitcleanup.hpp"
+#include "types.hpp"
+#include "main.hpp"
+
+void SignalHandler(int code) {
+    switch (code) {
+      case SIGTERM:
+        std::cerr << "\nreceived SIGTERM exiting...\n";
+        break;
+      case SIGINT:
+        std::cerr << "\nreceived SIGINT exiting...\n";
+        break;
+      case SIGQUIT:
+        std::cerr << "\nreceived SIGQUIT exiting...\n";
+        break;
+      case SIGHUP:
+        std::cerr << "\nreceived SIGHUP exiting...\n";
+        break;
+    
+      case SIGSEGV:
+        std::cerr << "\nreceived SIGSEGV(segmentaiton fault) exiting...\nIf this "
+                     "repeats please report it as a bug\n";
+        break;
+    }
+    try {
+      GeneralCleanUp(code);
+    } catch(...) {
+      std::cerr << RED"[ERROR]" << RESET" general cleanup error\n";
+      exit(errno);
+    }
+  }
+  
+  void GeneralCleanUp(int code) {
+  
+    for(Entity *entity : loaded_entities) {
+      try {
+      SDL_DestroyTexture(entity->texture);
+      } catch(...) {
+        std::cerr << RED"[ERROR]" << RESET" failed to destroy texture of entity\nentity address:" << YELLOW << entity << RESET"\n";
+      }
+    }
+  
+    try {
+    SDL_DestroyWindow(main_sdl_session.window);
+    } catch(...) {
+      std::cerr << RED"[ERROR]" << RESET" failed to destroy window\n";
+    }
+    try{
+    SDL_DestroyRenderer(main_sdl_session.renderer);
+    } catch(...) {
+      std::cerr << RED"[ERROR]" << RESET" failed to destroy renderer\n";
+    }
+    try {
+    SDL_Quit();
+    } catch (...) {
+      std::cerr << RED"[ERROR]" << RESET" failed to quit sdl\n";
+    } 
+    exit(code);
+  }

src/exitcleanup.hpp

@@ -0,0 +1,4 @@
+#ifndef EC_NS
+#define EC_NS
+void GeneralCleanUp(int code = 0);
+#endif

src/init.cpp

@@ -0,0 +1,46 @@
+#include "init.hpp"
+#include "color.h"
+#include "main.hpp"
+#include <csignal>
+#include <cstdlib>
+#include <fstream>
+#include <iostream>
+#include <nlohmann/json.hpp>
+#include <ostream>
+#include <string>
+
+using json = nlohmann::json;
+
+void init_entity(Entity &entity, SDL_Renderer *renderer, std::string type,
+                 std::string name) {
+  json entities;
+  try {
+    std::ifstream entitiesF("./assets/entities.json");
+    entities = json::parse(entitiesF);
+
+  } catch (const json::parse_error &e) {
+    std::cerr << "Parse error: " << e.what() << "\n";
+    exit(1);
+  } catch (const std::exception &e) {
+    std::cerr << "Error: " << e.what() << "\n";
+    exit(2);
+  }
+
+  loaded_entities.push_back(&entity);
+  std::clog << entities[type];
+
+  entity.texture = IMG_LoadTexture(
+      renderer, entities[type][name]["texture"].get<std::string>().c_str());
+
+  if (entity.texture == NULL) {
+    std::cerr << "\n" << RED "[ERROR]" << RESET " failed to load texture\n";
+    exit(ENOENT);
+  }
+
+  entity.srcRect = {0, 0, entities[type][name]["width"].get<int>(),
+                    entities[type][name]["height"].get<int>()};
+
+  entity.speed = entities[type][name]["speed"].get<float>();
+
+  entity.gotoT = false;
+}

src/init.hpp

@@ -0,0 +1,8 @@
+#include "types.hpp"
+
+#ifndef IN_NS
+#define IN_NS
+
+void init_entity(Entity &entity, SDL_Renderer *renderer,std::string type, std::string name);
+
+#endif

src/main.cpp

@@ -1,175 +1,246 @@
+#include "exitcleanup.hpp"
+#include "init.hpp"
+#include "types.hpp"
 #include <SDL3/SDL.h>
 #include <SDL3_image/SDL_image.h>
-#include "types.hpp"
+#include <cmath>
+#include <csignal>
+#include <iostream>
+#include <vector>
+#include <ctime>
+#include <iomanip>
 
-constexpr int SCREEN_WIDTH = 800;
-constexpr int SCREEN_HEIGHT = 600;
-constexpr int WORLD_WIDTH = 1600;
-constexpr int WORLD_HEIGHT = 1200;
-constexpr int TARGET_FPS = 60;
-constexpr Uint64 TARGET_FRAME_TIME_NS = 1'000'000'000 / TARGET_FPS;
-
-struct Entity {
-    SDL_FRect position;
-    SDL_Texture* texture;
-    SDL_Rect srcRect;
-    float speed = 250.0f;
-    Angle360 Angle;
-};
-
-struct Camera {
-    SDL_FRect view = {0.0f, 0.0f, SCREEN_WIDTH, SCREEN_HEIGHT};
-    bool followPlayer = true;
-    float speed = 500.0f;
-    float smoothness = 0.1f;
-};
+std::vector<Entity *> loaded_entities;
+sdl_session main_sdl_session;
 
 int main() {
-    SDL_Init(SDL_INIT_VIDEO);
-    SDL_Window* window = SDL_CreateWindow("Naval Swarm", SCREEN_WIDTH, SCREEN_HEIGHT, 0);
-    SDL_Renderer* renderer = SDL_CreateRenderer(window, "gpu,vulcan");
+  SDL_Init(SDL_INIT_VIDEO);
 
-    // Load textures
-    SDL_Texture* spriteSheet = IMG_LoadTexture(renderer, "assets/destroyer.svg");
-    SDL_Texture* bgTexture = IMG_LoadTexture(renderer, "assets/background.png");
+  main_sdl_session.window =
+      SDL_CreateWindow("Naval Swarm", SCREEN_WIDTH, SCREEN_HEIGHT, 0);
+  SDL_Renderer *renderer =
+      SDL_CreateRenderer(main_sdl_session.window, "gpu,vulcan");
 
-    // Initialize player
-    Entity destroyer;
-    destroyer.texture = spriteSheet;
-    destroyer.position = {WORLD_WIDTH/2.0f, WORLD_HEIGHT/2.0f, 58.0f, 512.0f};
-    destroyer.srcRect = {0, 0, 58, 512};  // Static source rectangle
-    destroyer.Angle = 0;
+  // Load textures
+  SDL_Texture *bgTexture = IMG_LoadTexture(renderer, "assets/background.png");
 
-    // Initialize camera
-    Camera camera;
-    bool running = true;
-    Uint64 lastFrameTime = SDL_GetTicksNS();
-    float deltaTime = 0.0f;
+  // Initialize player
+  Entity destroyer;
 
-    while (running) {
-        const Uint64 frameStart = SDL_GetTicksNS();
+  init_entity(destroyer, renderer, "ship", "destroyer");
 
-        // Event handling
-        SDL_Event event;
-        while (SDL_PollEvent(&event)) {
-            if (event.type == SDL_EVENT_QUIT) running = false;
-        }
+  destroyer.position = {WORLD_WIDTH / 2.0f, WORLD_HEIGHT / 2.0f,
+                        static_cast<float>(destroyer.srcRect.w),
+                        static_cast<float>(destroyer.srcRect.h)};
 
-        // Input handling
-        const bool* keystate = SDL_GetKeyboardState(NULL);
+  // Initialize camera
+  Camera camera;
+  bool running = true;
+  Uint64 lastFrameTime = SDL_GetTicksNS();
+  float deltaTime = 0.0f;
 
-        // Toggle camera mode with C key
-        static Uint32 lastToggle = 0;
-        if (keystate[SDL_SCANCODE_C] && (SDL_GetTicks() - lastToggle > 200)) {
-            camera.followPlayer = !camera.followPlayer;
-            lastToggle = SDL_GetTicks();
-        }
+  time_t start_time = std::time(nullptr);
 
-        // Player movement
-        int moveX = keystate[SDL_SCANCODE_RIGHT] - keystate[SDL_SCANCODE_LEFT];
-        int moveY = keystate[SDL_SCANCODE_DOWN] - keystate[SDL_SCANCODE_UP];
+  while (running) {
+    const Uint64 frameStart = SDL_GetTicksNS();
 
-        // There is propably more eficient way to do this
-        switch (moveX) {
-            case 1:
-                switch (moveY) {
-                    case 1:
-                        destroyer.Angle = 135;
-                        break;
-                    case -1:
-                        destroyer.Angle = 45;
-                        break;
-                    default:
-                        destroyer.Angle = 90;
-                }
-                break;
-            case -1:
-                switch (moveY) {
-                    case 1:
-                        destroyer.Angle = 225;
-                        break;
-                    case -1:
-                        destroyer.Angle = 315;
-                        break;
-                    default:
-                        destroyer.Angle = 270;
-                }
-                break;
-            default:
-                switch (moveY) {
-                    case 1:
-                        destroyer.Angle = 180;
-                        break;
-                    case -1:
-                        destroyer.Angle = 0;
-                        break;
-                }            
-        }
 
-        destroyer.position.x += (float)moveX * destroyer.speed * deltaTime;
-        destroyer.position.y += (float)moveY * destroyer.speed * deltaTime;
+    // Event handling
+    SDL_Event event;
+    while (SDL_PollEvent(&event)) {
+      if (event.type == SDL_EVENT_QUIT) {
+        running = false;
+      }
+      if (event.type == SDL_EVENT_MOUSE_WHEEL) {
+        float zoom_factor = (event.wheel.y > 0) ? 0.9f : 1.1f;
+        camera.view.w *= zoom_factor;
+        camera.view.h *= zoom_factor;
 
-        // Camera movement
-        if (camera.followPlayer) {
-            float targetX = destroyer.position.x + destroyer.position.w/2 - camera.view.w/2;
-            float targetY = destroyer.position.y + destroyer.position.h/2 - camera.view.h/2;
-            camera.view.x += (targetX - camera.view.x) * camera.smoothness;
-            camera.view.y += (targetY - camera.view.y) * camera.smoothness;
-        } else {
-            float camMoveX = keystate[SDL_SCANCODE_L] - keystate[SDL_SCANCODE_J];
-            float camMoveY = keystate[SDL_SCANCODE_K] - keystate[SDL_SCANCODE_I];
-            camera.view.x += camMoveX * camera.speed * deltaTime;
-            camera.view.y += camMoveY * camera.speed * deltaTime;
-        }
-
-        // World bounds
-        destroyer.position.x = SDL_clamp(destroyer.position.x, 0.0f, WORLD_WIDTH - destroyer.position.w);
-        destroyer.position.y = SDL_clamp(destroyer.position.y, 0.0f, WORLD_HEIGHT - destroyer.position.h);
-        camera.view.x = SDL_clamp(camera.view.x, 0.0f, WORLD_WIDTH - camera.view.w);
-        camera.view.y = SDL_clamp(camera.view.y, 0.0f, WORLD_HEIGHT - camera.view.h);
-        
-        //ANIMATION HERE
-
-        // Rendering
-        SDL_SetRenderDrawColor(renderer, 30, 30, 45, 255);
-        SDL_RenderClear(renderer);
-
-        // Draw background
-        if (bgTexture) {
-            SDL_FRect bgDest = { -camera.view.x, -camera.view.y, WORLD_WIDTH, WORLD_HEIGHT };
-            SDL_RenderTexture(renderer, bgTexture, NULL, &bgDest);
-        }
-
-        // Draw player (simplified without animation)
-        SDL_FRect srcFRect;
-        SDL_RectToFRect(&destroyer.srcRect, &srcFRect);
-        SDL_FRect destRect = {
-            destroyer.position.x - camera.view.x,
-            destroyer.position.y - camera.view.y,
-            destroyer.position.w,
-            destroyer.position.h
+        // Zoom towards mouse position
+        SDL_FPoint mouse_world_pos = {
+            camera.view.x + event.wheel.mouse_x,
+            camera.view.y + event.wheel.mouse_y
         };
-        SDL_RenderTextureRotated(renderer, destroyer.texture, &srcFRect, &destRect, destroyer.Angle, nullptr, SDL_FLIP_NONE);
-    
-        SDL_RenderPresent(renderer);
-
-        // Frame timing (unchanged)
-        const Uint64 frameTime = SDL_GetTicksNS() - frameStart;
-        if (frameTime < TARGET_FRAME_TIME_NS) {
-            const Uint64 sleepTime = TARGET_FRAME_TIME_NS - frameTime;
-            SDL_DelayNS(sleepTime - 2'000'000);
-            while (SDL_GetTicksNS() - frameStart < TARGET_FRAME_TIME_NS) {}
+        
+        camera.view.x = mouse_world_pos.x - (event.wheel.mouse_x * zoom_factor);
+        camera.view.y = mouse_world_pos.y - (event.wheel.mouse_y * zoom_factor);
+    }
+      if (event.type == SDL_EVENT_MOUSE_BUTTON_DOWN) {
+        // Check specific button (e.g., left mouse button)
+        if (event.button.button == SDL_BUTTON_LEFT) {
+          std::clog << "Left mouse clicked at (" 
+          << std::fixed << std::setprecision(1) << event.button.x << ", " << event.button.y << ")\n"
+          << "Camera position: (" << camera.view.x << ", " << camera.view.y << ")\n"
+          << "Target position: (" << (camera.view.x + event.button.x) << ", " 
+          << (camera.view.y + event.button.y) << ")\ntime since start: " << (std::time(nullptr) - start_time) << "\n";
+          destroyer.Tposition.x = camera.view.x + event.button.x;
+          destroyer.Tposition.y = camera.view.y + event.button.y;
+          destroyer.gotoT = true;
         }
-
-        deltaTime = (SDL_GetTicksNS() - lastFrameTime) / 1e9f;
-        lastFrameTime = SDL_GetTicksNS();
+      }
     }
 
-    // Cleanup
-    SDL_DestroyTexture(spriteSheet);
-    SDL_DestroyTexture(bgTexture);
-    SDL_DestroyRenderer(renderer);
-    SDL_DestroyWindow(window);
-    SDL_Quit();
-    return 0;
+    // Input handling
+    const bool *keystate = SDL_GetKeyboardState(NULL);
+
+    // Toggle camera mode with C key
+    static Uint32 lastToggle = 0;
+    if (keystate[SDL_SCANCODE_C] && (SDL_GetTicks() - lastToggle > 200)) {
+      camera.followPlayer = !camera.followPlayer;
+      lastToggle = SDL_GetTicks();
+    }
+
+    //DEBUG
+    if (keystate[SDL_SCANCODE_B] && (SDL_GetTicks() - lastToggle > 200)) {
+      std::clog << "x: " << destroyer.position.x << " y: " << destroyer.position.y << "\n";
+    }
+    if (keystate[SDL_SCANCODE_O] && (SDL_GetTicks() - lastToggle > 200)) {
+
+      destroyer.position.x = 0;
+      destroyer.position.y = 0;
+        }
+
+    // Player movement
+    int moveX = keystate[SDL_SCANCODE_RIGHT] - keystate[SDL_SCANCODE_LEFT];
+    int moveY = keystate[SDL_SCANCODE_DOWN] - keystate[SDL_SCANCODE_UP];
+
+    // There is propably more eficient way to do this
+    switch (moveX) {
+    case 1:
+      switch (moveY) {
+      case 1:
+        destroyer.angle = 135;
+        break;
+      case -1:
+        destroyer.angle = 45;
+        break;
+      default:
+        destroyer.angle = 90;
+      }
+      break;
+    case -1:
+      switch (moveY) {
+      case 1:
+        destroyer.angle = 225;
+        break;
+      case -1:
+        destroyer.angle = 315;
+        break;
+      default:
+        destroyer.angle = 270;
+      }
+      break;
+    default:
+      switch (moveY) {
+      case 1:
+        destroyer.angle = 180;
+        break;
+      case -1:
+        destroyer.angle = 0;
+        break;
+      }
+    }
+
+    float step = destroyer.speed * deltaTime;
+    destroyer.position.x += (float)moveX * step;
+    destroyer.position.y += (float)moveY * step;
+
+    if (destroyer.gotoT) {
+      float dx = destroyer.Tposition.x - destroyer.Central_position().x;
+      float dy = destroyer.Tposition.y - destroyer.Central_position().y;
+
+      if(dx != 0 && dy != 0) {
+        destroyer.angle = std::atan2(dy, dx) * 180 / M_PI + 90;
+      }
+
+      float distance = std::sqrt(dx * dx + dy * dy);
+      if (distance > 0) {
+        dx /= distance;
+        dy /= distance;
+
+        if (distance <= step) {
+          destroyer.Central_position(destroyer.Tposition.x,
+                                     destroyer.Tposition.y);
+
+        } else {
+          destroyer.position.x += dx * step;
+          destroyer.position.y += dy * step;
+        }
+
+      } else {
+        destroyer.gotoT = false;
+      }
+    }
+
+    // Camera handling
+    camera.view.w = SCREEN_WIDTH / camera.zoom;
+    camera.view.h = SCREEN_HEIGHT / camera.zoom;
+
+    if (camera.followPlayer) {
+      float targetX =
+          destroyer.position.x + destroyer.position.w / 2 - camera.view.w / 2;
+      float targetY =
+          destroyer.position.y + destroyer.position.h / 2 - camera.view.h / 2;
+      camera.view.x += (targetX - camera.view.x) * camera.smoothness;
+      camera.view.y += (targetY - camera.view.y) * camera.smoothness;
+    } else {
+      float camMoveX = keystate[SDL_SCANCODE_D] - keystate[SDL_SCANCODE_A];
+      float camMoveY = keystate[SDL_SCANCODE_S] - keystate[SDL_SCANCODE_W];
+      camera.view.x += camMoveX * camera.speed * deltaTime;
+      camera.view.y += camMoveY * camera.speed * deltaTime;
+    }
+
+    // World bounds
+    destroyer.position.x = SDL_clamp(destroyer.position.x, 0.0f,
+                                     WORLD_WIDTH - destroyer.position.w);
+    destroyer.position.y = SDL_clamp(destroyer.position.y, 0.0f,
+                                     WORLD_HEIGHT - destroyer.position.h);
+
+    camera.view.w = SDL_clamp(camera.view.w, SCREEN_WIDTH * camera.zoom,  SCREEN_WIDTH * 4.0f);
+    camera.view.h = SDL_clamp(camera.view.h,SCREEN_HEIGHT * camera.zoom,SCREEN_HEIGHT * 4.0f);
+    camera.view.x = SDL_clamp(camera.view.x, 0.0f, WORLD_WIDTH - camera.view.w);
+    camera.view.y = SDL_clamp(camera.view.y, 0.0f, WORLD_HEIGHT - camera.view.h);
+
+    // ANIMATION HERE
+
+    // Rendering
+    SDL_SetRenderDrawColor(renderer, 30, 30, 45, 255);
+    SDL_RenderClear(renderer);
+
+    // Draw background
+    if (bgTexture) {
+      SDL_FRect bgDest = {-camera.view.x, -camera.view.y, WORLD_WIDTH,
+                          WORLD_HEIGHT};
+      SDL_RenderTexture(renderer, bgTexture, NULL, &bgDest);
+    }
+
+    // Draw player (simplified without animation)
+    SDL_FRect srcFRect;
+    SDL_RectToFRect(&destroyer.srcRect, &srcFRect);
+    SDL_FRect destRect = {destroyer.position.x - camera.view.x,
+                          destroyer.position.y - camera.view.y,
+                          destroyer.position.w, destroyer.position.h};
+    SDL_RenderTextureRotated(renderer, destroyer.texture, &srcFRect, &destRect,
+                             destroyer.angle, nullptr, SDL_FLIP_NONE);
+
+    SDL_RenderPresent(renderer);
+
+    // Frame timing (unchanged)
+    const Uint64 frameTime = SDL_GetTicksNS() - frameStart;
+    if (frameTime < TARGET_FRAME_TIME_NS) {
+      const Uint64 sleepTime = TARGET_FRAME_TIME_NS - frameTime;
+      SDL_DelayNS(sleepTime - 2'000'000);
+      while (SDL_GetTicksNS() - frameStart < TARGET_FRAME_TIME_NS) {
+      }
+    }
+
+    deltaTime = (SDL_GetTicksNS() - lastFrameTime) / 1e9f;
+    lastFrameTime = SDL_GetTicksNS();
+  }
+
+  // Cleanup
+  SDL_DestroyTexture(bgTexture);
+  GeneralCleanUp();
+  SDL_Quit();
+  return 0;
 }

src/main.hpp

@@ -0,0 +1,10 @@
+#include <vector>
+#include "types.hpp"
+
+#ifndef MAIN_NS
+#define MAIN_NS
+
+extern std::vector<Entity*> loaded_entities;
+extern sdl_session main_sdl_session;
+
+#endif

src/types.hpp

@@ -1,46 +1,109 @@
+#include "const.hpp"
 #include <SDL3/SDL.h>
 #include <SDL3_image/SDL_image.h>
 #include <iostream>
+#include <optional>
+#include <cmath>
 
-struct Angle360 {
-    private:
-        int value{0};
-    
-        void normalize() {
-            value %= 360;
-            if (value < 0) value += 360;  // Handle negative values
-        }
-    
-    public:
-        // Constructor
-        Angle360(int val = 0) : value(val) { normalize(); }
-    
-        // Assignment operator
-        Angle360& operator=(int val) {
-            value = val;
-            normalize();
-            return *this;
-        }
-    
-        // Compound assignment
-        Angle360& operator+=(int rhs) {
-            value += rhs;
-            normalize();
-            return *this;
-        }
-    
-        Angle360& operator-=(int rhs) {
-            value -= rhs;
-            normalize();
-            return *this;
-        }
-    
-        // Type conversion
-        operator int() const { return value; }
-    
-        // Stream output
-        friend std::ostream& operator<<(std::ostream& os, const Angle360& a) {
-            return os << a.value;
-        }
-    };
-    
+#ifndef TYPES_NS
+#define TYPES_NS
+
+struct Angle {
+private:
+  float value{0};
+
+  void normalize() {
+    value = std::fmod(value, 360);
+    if (value < 0)
+      value += 360; // Handle negative values
+  }
+
+public:
+  // Constructor
+  Angle(int val = 0) : value(val) { normalize(); }
+
+  // Assignment operator
+  Angle &operator=(int val) {
+    value = val;
+    normalize();
+    return *this;
+  }
+
+  // Compound assignment
+  Angle &operator+=(int rhs) {
+    value += rhs;
+    normalize();
+    return *this;
+  }
+
+  Angle &operator-=(int rhs) {
+    value -= rhs;
+    normalize();
+    return *this;
+  }
+
+  // Type conversion
+  operator int() const { return value; }
+
+  // Stream output
+  friend std::ostream &operator<<(std::ostream &os, const Angle &a) {
+    return os << a.value;
+  }
+};
+
+struct basic_cords {
+  float x;
+  float y;
+};
+
+struct Entity {
+  SDL_FRect position;
+  SDL_FRect Tposition;
+  bool gotoT = false;
+  SDL_Texture *texture;
+  SDL_Rect srcRect;
+  float speed;
+  Angle angle = 0;
+
+  basic_cords Central_position(std::optional<float> x = std::nullopt,
+                               std::optional<float> y = std::nullopt) {
+    if (x != std::nullopt) {
+      position.x = *x - position.w / 2;
+    }
+    if (y != std::nullopt) {
+      position.y = *y - position.h / 2;
+    }
+
+    return {position.x + position.w / 2, position.y + position.h / 2};
+  }
+};
+
+struct Camera {
+  SDL_FRect view = {0.0f, 0.0f, SCREEN_WIDTH, SCREEN_HEIGHT};
+
+  basic_cords Center_of_view(std::optional<float> x = std::nullopt,
+    std::optional<float> y = std::nullopt) {
+    if (x != std::nullopt) {
+			view.x = *x - view.w / 2;
+		}
+		if (y != std::nullopt) {
+			view.y = *y - view.h / 2;
+		}
+
+return {view.x + view.w / 2, view.y + view.h / 2};
+}
+
+  bool followPlayer = false;
+  float speed = 500.0f;
+  float smoothness = 0.1f;
+  float zoom = 1.0f;
+	float minZoom = 0.5f;
+	float maxZoom = 3.0f;
+	float zoomSpeed = 0.1f;
+};
+
+struct sdl_session {
+  SDL_Window *window;
+  SDL_Renderer *renderer;
+};
+#endif