[Algorithms] Real-Time Shadows

[Pai-Hung C. <pa...@ac...>]

Hi,

I am palnning to use traditional Shadow Volume technique to generate dynamic
shadows.  Can anyone help me start on how to calculate shadow polygons
(bounding polygons of the shadow volumne) in the world space?  (I use
Direct3D.)  Also, I am wondering if shadow volume is the right choice for
real-time 3D games to generate shadows.  In my case, I am using Quake II
models as my characters, each of which is composed of 500~1000 polygons.
Can someone in-the-know tell me how shadows are typically generated in 3D
RPG games?

BTW, can someone point me to any tutorials detailing how to calculate
object's silhouette and then build shadow volume from it?

Thank you,

Pai-Hung Chen