Re: [Algorithms] Camera movement

[Stephen J B. <sj...@li...>]

On Mon, 5 Mar 2001, Steven Eckles wrote:

> I have a small problem that's been really bugging me in my little DX8 3D
> engine I'm working on. when ever the frame rate drops below the monitor
> refresh rate ( i.e 60 fps of 75fps depending) then the camera movement gets
> very jerky/choppy. I happens whatever the drop, even if it's only a drop of
> 1fps, and seems to be worse when turning (yaw). Anyone any idea why this
> happens and how I can stop it?
 
It's a perceptual effect.  Your brain is trying to generate a smooth
interpolation of an image that doesn't move between two consecutive
images and then jumps ahead on the next image.  It's response to that
is to tell your 'higher' brain functions that there are two objects
moving around instead of one.

There really isn't a fix for it.  To get smooth graphics you MUST
generate images at the video frame rate.  Running your monitor at
only 60Hz will help you to do that.

----
Steve Baker                      (817)619-2657 (Vox/Vox-Mail)
L3Com/Link Simulation & Training (817)619-2466 (Fax)
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