3D polygon clippers

3D polygon clippers

Post by Chas Bo » Sun, 02 Dec 1990 01:40:00



        Does anyone out there have sources for a quick&dirty routine to clip
   3D polygons to the viewing pyramid?  I would like to see an example in some
   popular language like C, Pascal, or Fortran.  If you know of a reference in
   a book let me know, too.

        I remember a Byte article by Franklin who listed an entire pascal prog,
   but I never got it to work properly because I could not read the printout
   very well.  If anybody has a working version of this, or something similar
   I would be thrilled!

                        Thanks (and Merry Christmas) in advance,
                                                Chas.
UUCP  ihnp4!uw-beaver!ssc-vax!ssc-bee!chas     (Charles Boyd)

WORK  (206) 773-3878                    Now is the time for all good men to
HOME  (206) 271-7216                    come to the aid of their planet...
--
UUCP  (uw-beaver|fluke)!ssc-vax!ssc-bee!chas   (Charles Boyd)

WORK  (206) 773-3878                    Now is the time for all good men to
HOME  (206) xxx-xxxx                    come to the aid of their planet...

 
 
 

3D polygon clippers

Post by Kurt_R_Arth » Sun, 02 Dec 1990 15:46:00



>    Does anyone out there have sources for a quick&dirty routine to clip
>    3D polygons to the viewing pyramid?  I would like to see an example in some
>    popular language like C, Pascal, or Fortran.  If you know of a reference in
>    a book let me know, too.

>    I remember a Byte article...

Byte has a pair of BBS's: BIX and BYTEnet, both of which have source code
listings for all articles it's published.  Maybe the code you're looking for is
in there (or at least something you can modify)

BIX costs $39 to join, Bytenet is free.  Look in BYTE for the number (or email
me and I'll post it).

Kurt Arthur
Software Services of Florida, Inc.

 
 
 

1. Q: best 3D polygon clipper?

What is the best (computationally least expensive) known algorithm
for clipping polygons in 3D against an upright parallel view volume?
(Actually, my application needs no yon plane: zMax is +infinity.)

Is there a 3D version of Liang-Barsky's 2D polygon clipper?
--
Mikael Pettersson, Dept of Comp & Info Sci, University of Linkoping, Sweden

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