RE: [Algorithms] Real-Time Shadows

[Steve W. <Ste...@im...>]

> From: Pai-Hung Chen [mailto:pa...@ac...]
> 
> Can anyone help me start on how to calculate shadow polygons
> (bounding polygons of the shadow volumne) in the world space?

I guess just a start would be a common suggestion that I've heard for
shadows...drawing just the objects that will create shadows onto a back
surface with the camera positioned to where the light will be that you want
to create shadows for while using a darker texture than what the object
normally has, then blitting that "shadow" into your world.  The drawbacks
are that you have to figure out which objects are in front of which for each
light...not the kind of thing you want to do in real-time, unless you just
have a ceiling light and just want a shadow on the floor from players.

That's about all I know, and I haven't worked out any of the details for it.

R&R