From c055eeef6d41269d11b2ddf7f9aba6f8867da65d Mon Sep 17 00:00:00 2001
From: Nikita Kostovsky <nikita@kostovsky.me>
Date: Tue, 23 Dec 2025 15:28:05 +0100
Subject: initial commit

---
 core/src/cpp/main.cpp | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 core/src/cpp/main.cpp

(limited to 'core/src/cpp/main.cpp')

diff --git a/core/src/cpp/main.cpp b/core/src/cpp/main.cpp
new file mode 100644
index 0000000..915e0ce
--- /dev/null
+++ b/core/src/cpp/main.cpp
@@ -0,0 +1,64 @@
+#include <iostream>
+#include <chrono>
+#include <thread>
+
+#include <SDL.h>
+
+#include "assets.h"
+#include "fps_counter.h"
+#include "map.h"
+#include "player.h"
+
+void main_loop(SDL_Renderer *renderer) {
+    FPS_Counter fps_counter(renderer);
+    Map map(renderer);
+    Player player(renderer);
+    TimeStamp timestamp = Clock::now();
+
+    while (true) {       // main game loop
+        SDL_Event event; // handle window closing
+        if (SDL_PollEvent(&event) && (SDL_QUIT==event.type || (SDL_KEYDOWN==event.type && SDLK_ESCAPE==event.key.keysym.sym)))
+            break; // quit
+        player.handle_keyboard(); // no need for the event variable, direct keyboard state polling
+
+        const auto dt = Clock::now() - timestamp;
+        if (dt<std::chrono::milliseconds(20)) { // 50 FPS regulation
+            std::this_thread::sleep_for(std::chrono::milliseconds(1));
+            continue;
+        }
+        timestamp = Clock::now();
+
+        player.update_state(std::chrono::duration<double>(dt).count(), map); // gravity, movements, collision detection etc
+
+        SDL_RenderClear(renderer); // re-draw the window
+        fps_counter.draw();
+        player.draw();
+        map.draw();
+        SDL_RenderPresent(renderer);
+    }
+} // N.B. fps_counter, map and player objects call their destructors here, thus destroying allocated textures, it must be done prior to destroying the renderer
+
+int main() {
+    SDL_SetMainReady(); // tell SDL that we handle main() function ourselves, comes with the SDL_MAIN_HANDLED macro
+    if (SDL_Init(SDL_INIT_VIDEO)) {
+        std::cerr << "Failed to initialize SDL: " << SDL_GetError() << std::endl;
+        return -1;
+    }
+
+    SDL_Window   *window   = nullptr;
+    SDL_Renderer *renderer = nullptr;
+    if (SDL_CreateWindowAndRenderer(1024, 768, SDL_WINDOW_SHOWN | SDL_WINDOW_INPUT_FOCUS, &window, &renderer)) {
+        std::cerr << "Failed to create window and renderer: " << SDL_GetError() << std::endl;
+        return -1;
+    }
+    SDL_SetWindowTitle(window, "SDL2 game blank");
+    SDL_SetRenderDrawColor(renderer, 210, 255, 179, 255);
+
+    main_loop(renderer); // all interesting things happen here
+
+    SDL_DestroyRenderer(renderer);
+    SDL_DestroyWindow(window);
+    SDL_Quit();
+    return 0;
+}
+
-- 
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