home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Graphics Plus
/
Graphics Plus.iso
/
general
/
modelers
/
geomview
/
sgi.lha
/
Geomview
/
man
/
cat1
/
pssnap.1
< prev
next >
Wrap
Text File
|
1993-03-02
|
2KB
|
67 lines
pssnap(1) pssnap(1)
NAME
pssnap - PostScript drawer for Geomview objects.
SYNOPSIS
pssnap
DESCRIPTION
Pssnap places a PostScript image of a geomview object in a
file (default: snap.ps). Pssnap is meant to be run as a
geomview external module, and draws the currently selected
object from the point of view of the current camera.
The image is sized to fit on an 8.5 x 11 inch sheet of
paper. Pssnap uses the orientation of the surfaces to
determine lighting. When creating black and white
PostScript, pssnap uses averages the r, g and b components
of the color of the object using the formula
grey = .299 * r + .587 * g + .114 * b.
Pssnap does not support smooth shading. If an object con-
tains per vertex colors, the entire face is given the same
color as the first vertex.
OPTIONS
BUGS
Pssnap calls the same conversion routine as anytopl (see
anytopl(3)) and so shares all its bugs.
Pssnap sorts the polygons by z value prior to drawing them
instead of doing true z-buffering. This sometimes causes
mistakes in the final image, particularly if the faces of
the object intersect one another.
SEE ALSO
anytopl(3), pssnap(3), sortbyz(3)
AUTHOR
Celeste Fowler email: fowler@geom.umn.edu
The Geometry Center phone: (612) 626-8304
1300 South Second Street
Minneapolis, MN 55454
Geometry Center June 12, 1992 1