🔒 Locked

Time based movement problem

Started by -Tony- Sep 5, 2003 at 12:55 PM 2 replies 600+ views

Original Post

Sep 5, 2003 at 12:55 PM

When you move the game window around for a while, delta time gets really high and then the game characters move too much and gets stuck sometimes. How do you fix this? this is the game loop


while(!Window.IsClosed())
 {
  if(PeekMessage(&Msg, NULL, 0, 0, PM_REMOVE))
  {
   TranslateMessage(&Msg);
   DispatchMessage(&Msg);
  }
  else if(Window.IsVisible())
  {
   CalculateFps();

   if(!Game.Process(Timer.GetTime(), DeltaTime))
    break;

   Window.Swap();
  }
  else
  {
   CalculateFps();
   WaitMessage();
  }
 }

psykr

Sep 6, 2003 at 1:21 PM

How about pausing the game while the window is moving? Or if you dig into MSDN enough, I bet there''s a way to keep the app rendering while you''re moving it around.

jamessharpe

Sep 6, 2003 at 1:29 PM

Try removing the call to wait message. Then, if there are no messages waiting, your loop will continue, instead of waiting for a new message, thus keeping the delta up to date.

You may also find that changing the if(PeekMessage(..) ) to while(PeekMessage(..) ) will result in a more responsive app.

Generally in game apps you never call WaitMessage, since you don't want to be waiting for a message from windows, you want to be doing something else, like making the AI think, or rendering, or any other task you find you may want to do.

[edited by - jamessharpe on September 6, 2003 2:32:02 PM]

JohnBolton

132

JohnBolton

Sep 6, 2003 at 4:28 PM

Try turning off this checkbox: Control Panel > Display > Appearance > Effects... > "Show window contents while dragging".

jamessharpe: WaitMessage() probably is not a problem since it is only called if IsVisible() returns false.

Topic Locked

This topic has been locked by a moderator. New replies are not allowed.