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> -----Original Message-----
> From: Matthew Lewis [mailto:[EMAIL PROTECTED]]
> Sent: Friday, April 05, 2002 12:00
> To: [EMAIL PROTECTED]
> Subject: [hlcoders] portal engine theory
>
>
> I'm trying to understand how a portal style game engine works
> by writing one
> myself using openGL. I have written code that generates a
> leafy-BSP tree,
> but I'm not sure how you get portals out of it. I'm also
> unclear how you
> determine if a polygon is inside or outside the world or
> inside another
> brush (how is level flooding done?). Does anyone know of a
> website or book
> which gives detailed explainations on the techniques used to
> build a portal
> engine? Pretty much all the websites I've found so far only give a
> superficial explanation on how this is done.
>
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