1 files changed, 12 insertions, 2 deletions
diff --git a/src/main.cpp b/src/main.cpp
index b2a48d9..24a3147 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -357,7 +357,7 @@ int main()
     lua_setglobal(L, "HEIGHT");
 
     SDL_Init(SDL_INIT_EVERYTHING);
-    SDL_CreateWindowAndRenderer(WIDTH, HEIGHT, 0, &window, &renderer);
+    SDL_CreateWindowAndRenderer(WIDTH, HEIGHT, SDL_RENDERER_PRESENTVSYNC, &window, &renderer);
     SDL_SetWindowTitle(window, "Showdown of the Sticks");
     SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
     SDL_RenderSetLogicalSize(renderer, WIDTH, HEIGHT);
@@ -388,6 +388,9 @@ int main()
 
     call_lua_function(L, "Setup");
 
+    Uint32 lastFrameTime = SDL_GetTicks();
+    float deltaTime = 0.0f;
+
     while (running)
     {
         push_keys_to_lua(L, keys);
@@ -395,6 +398,13 @@ int main()
 
         call_lua_function(L, "Update");
 
+        Uint32 currentFrameTime = SDL_GetTicks();
+        deltaTime = (currentFrameTime - lastFrameTime) / 1000.0f;
+        lastFrameTime = currentFrameTime;
+
+        lua_pushnumber(L, deltaTime);
+        lua_setglobal(L, "deltaTime");
+
         while (SDL_PollEvent(&event))
         {
             if (event.type == SDL_QUIT)
@@ -538,7 +548,7 @@ int main()
         textList.clear();
 
         SDL_RenderPresent(renderer);
-        SDL_Delay(10);
+        SDL_Delay(1);
     }
 
     lua_close(L);