Path: utzoo!mnetor!uunet!littlei!foobar!argent!agora!rickc
From: rickc@agora.UUCP (Rick Coates)
Newsgroups: comp.graphics
Subject: Clarification of mapping question
Message-ID: <862@agora.UUCP>
Date: 13 Apr 88 23:24:18 GMT
Organization: Advanced Solutions, Hillsboro, OR
Lines: 36
Keywords: 2d mapping


I have received several responses to my original posting, and while
I do appreciate the comments, it has become clear that my first posting
was not specific enough.

My question did not deal with mapping a rectangle into a quadrilateral,
but mapping a rectangle into an arbitrary shape. I was not planning
to do this to bitmaps, but to world space floating point coordinates.
(Not asking for the transformation of anything more complex than
points.)

Example:
                              /--------------\ 
                             /                \ 
    a-----------b           a  ............    b 
    |           |           | .             .    \
    |...........|   ---->   |.   /---------\   ...\
    |           |           |   /            \     |
    c-----------d           c--/               \---d

(please forgive the graphics - the dots are an example 'line' that is deformed)

This is more difficult to do than the quadrilateral case.  I have heard
that Pixar does something like this, but have not seen it.

Any help out there?

Many thanks for those who have responded to my first posting, and
thanks in advance for others.


Rick Coates

tektronix!sequent!islabs!ateq!rick
OR
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