| 1 |
.\" RCSid "$Id: genprism.1,v 1.2 2003/12/09 15:59:06 greg Exp $"
|
| 2 |
.TH GENPRISM 1 3/19/96 RADIANCE
|
| 3 |
.SH NAME
|
| 4 |
genprism - generate a RADIANCE description of a prism
|
| 5 |
.SH SYNOPSIS
|
| 6 |
.B "genprism mat name"
|
| 7 |
{
|
| 8 |
.B -
|
| 9 |
|
|
| 10 |
.B vfile
|
| 11 |
|
|
| 12 |
.B "N v1 v2 .. vN"
|
| 13 |
}
|
| 14 |
[
|
| 15 |
.B "\-l lvect"
|
| 16 |
][
|
| 17 |
.B "\-r radius"
|
| 18 |
][
|
| 19 |
.B \-c
|
| 20 |
][
|
| 21 |
.B \-e
|
| 22 |
]
|
| 23 |
.SH DESCRIPTION
|
| 24 |
.I Genprism
|
| 25 |
produces a RADIANCE scene description of a prism, or extruded polygon.
|
| 26 |
The polygon to extrude lies in the z==0 plane, and
|
| 27 |
is given as a list of (x,y) pairs on the
|
| 28 |
standard input (-), or from the file
|
| 29 |
.I vfile,
|
| 30 |
or on the command line preceded by the number of vertices,
|
| 31 |
.I N.
|
| 32 |
The order of the vertices and the extrusion vector
|
| 33 |
.I lvect
|
| 34 |
(default (0,0,1)) determine the surface orientations.
|
| 35 |
The surfaces that make up the prism will be modified by
|
| 36 |
.I mat
|
| 37 |
and their identifiers will begin with
|
| 38 |
.I name.
|
| 39 |
The
|
| 40 |
.I \-r
|
| 41 |
option may be used to round the corners of the object using spheres
|
| 42 |
and cylinders.
|
| 43 |
The
|
| 44 |
.I \-c
|
| 45 |
option inhibits generation of a face connecting the last vertex to the first.
|
| 46 |
The
|
| 47 |
.I \-e
|
| 48 |
option inhibits generation of the end polygons.
|
| 49 |
.SH EXAMPLE
|
| 50 |
To produce a equilateral triangular prism:
|
| 51 |
.IP "" .2i
|
| 52 |
genprism clear_plastic prism 3 0 0 .5 .866 1 0
|
| 53 |
.SH AUTHOR
|
| 54 |
Greg Ward
|
| 55 |
.SH BUGS
|
| 56 |
The rounding option only works for opaque prisms with outward facing
|
| 57 |
normals.
|
| 58 |
If the normals face inward, the appearance will be bizarre.
|
| 59 |
.SH "SEE ALSO"
|
| 60 |
genbox(1), genrev(1), gensurf(1), genworm(1), rpict(1), rvu(1), xform(1)
|
