2 files changed, 8 insertions, 2 deletions
diff --git a/src/libjin/core/game.cpp b/src/libjin/core/game.cpp
index 4509478..ffd8015 100644
--- a/src/libjin/core/game.cpp
+++ b/src/libjin/core/game.cpp
@@ -25,6 +25,7 @@ namespace core
         _running = true;
         Event e;
         int previous = getMilliSecond();
+        float dt = MS_PER_UPDATE / 1000.0f;
         while (_running)
         {
             while (jin::input::pollEvent(&e))
@@ -32,13 +33,18 @@ namespace core
                 SAFECALL(_onEvent, &e);
                 if (!_running) goto stoploop;
             }
-            SAFECALL(_onUpdate);
+            SAFECALL(_onUpdate, dt);
             SAFECALL(_onDraw);
+            wnd->swapBuffers();
             const int current = getMilliSecond();
+            dt = (current - previous) / 1000.0f;
             const int wait = MS_PER_UPDATE - (current - previous);
             previous += MS_PER_UPDATE;
             if (wait > 0)
+            {
                 sleep(wait);
+                dt = MS_PER_UPDATE / 1000.0f;
+            }
             else
                 previous = current;
         }
diff --git a/src/libjin/core/game.h b/src/libjin/core/game.h
index 31825ba..090e7c6 100644
--- a/src/libjin/core/game.h
+++ b/src/libjin/core/game.h
@@ -17,7 +17,7 @@ namespace core
     public:
 
         typedef void(*onEvent)(jin::input::Event* e);
-        typedef void(*onUpdate)();
+        typedef void(*onUpdate)(float dt);
         typedef void(*onDraw)();
 
         struct Setting : SettingBase