11-05-2005 09:26									#1
	Scroll Speed Lose 30 kilos (of popups)

I have just started playing AOM. There is a problem with scrolling in the game. I am running it on P4 2.8GHz machine.

Scrolling the horizontal direction is way, way too fast. As soon as I move my mouse either to the left or right of the screen the scroll moves at lightning speed away in that direction. This makes the game very, very difficult to play.

Is anyone involved with the Source Code Project prepared to look at this issue?

	12-05-2005 00:48									#2
	Support Apolyton buy from Amazon

There's an ingame scroll-speed setting. Is it not working?

	12-05-2005 02:47									#3
	Put an end to popups!

The ingame control is a scroll delay. The default setting is 3/10th of a second. This means that when the mouse is moved to the edge of the screen the scroll will not start until this time has elapsed. It then rockets away in a totally uncontrolled fashion.

This is evident in many older games. The problem appears to be that scrolling is tied to CPU speed in some manner rather than to a fixed time or frame rate.

A while back when I was very bored I started to write a game from scratch. I forced it to have a frame rate of 60 milli seconds (i.e 16 frames/sec). I then organised for it to scroll by 2 tiles per frame.

Doing this makes scrolling completely independent of CPU speed since it's the frame rate that determines how quickly the screen gets redrawn.

I really have no idea of how scrolling is done in CTP and my knowledge of C/C++ is minimal at best. I don't even know if other people are having the same problem. My previous PC was a P3 1.2 GHz and everything was OK with that one. So there seems to be a threshold of some sort above which scrolling breaks down.

Last edited by Lou Wigman on 12-05-2005 at 03:00