From:	Shawn Hargreaves <Shawn AT talula DOT demon DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Allegro and 3d stuff
Date:	Thu, 30 Apr 1998 19:44:08 +0100
Organization:	None
Message-ID:	<dh+QyTA4ZMS1Ewcq@talula.demon.co.uk>
References:	<35489369 DOT 1085C512 AT ic DOT ac DOT uk>
NNTP-Posting-Host:	talula.demon.co.uk
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Peter Steele writes:
>I an a little bit new to allegro and was wondering if someome could tell
>me how I can move the coordinate system, eg move the origin to the
>centre of the screen.

Just add an offset onto your coordinates before you draw the shapes...

>I am asking this because when I tried a simple rotating cube problem 
>but trying to keep the cube on the screen was a problem when i used the 
>3-d to 2-d function (can't remember the exact name).

If you mean the persp_project() routine, you should use
set_projection_viewport() to specify which part of the 2d screen should
be used for projecting the 3d world coordinates.


--
Shawn Hargreaves - shawn AT talula DOT demon DOT co DOT uk - http://www.talula.demon.co.uk/
"Pigs use it for a tambourine" - Frank Zappa

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