NetNews Usenet Archive 1992 #20/NN_1992_20.iso/spool/comp/graphics/9482

Internet Message Format | 1992-09-08 | 1.3 KB

Path: sparky!uunet!usna!dfr
From: [e-mail] (PROF D. Rogers (EAS FAC))
Newsgroups: comp.graphics
Subject: Re: 2 and 3 point perspective info wanted
Message-ID: <[e-mail]>
Date: 6 Sep 92 10:59:40 GMT
References: <[e-mail]>
Sender: [e-mail]
Organization: U. S. Naval Academy
Lines: 21

In article <[e-mail]> [e-mail] (John S. Price) writes:

!I'm looking for 1, 2 and 3 point perspective formulas, to render a
!3-dimensional scene.  All I need is the formula to translate an
!(x,y,z) vector to an (x,y) projection of that, for 1, 2, and 3
!point perspective.  I've already translated the object such that
!my line-of-sight is along one of the axis; I just need to know how
!to now project that into my (x,y) space so I can view it.  I can
!handle all the necessary scaling, etc, to get it into my viewport.
!Simply the transformation matrix would be fine, but any discussion
!you wish to provide would also be appreciated.

The fact that you are asking for a 1,2,3 point perspective indicates
that you need a bit more background in the subject since
you actually only need a single point perspective to accomplish
what I suspect you want to do. I suggest you look in Chapter 3
of Mathematical Elements for Computer Graphics 2nd ed by
Rogers and Adams, McGraw-Hill 1990.

Dave Rogers