genprism(1)
generate a RADIANCE description of a prism
SYNOPSIS
genprism mat name
{
-
|
vfile
|
N v1 v2 .. vN
}
[
-l lvect
][
-r radius
][
-c
][
-e
]
DESCRIPTION
Genprism
produces a RADIANCE scene description of a prism, or extruded polygon.
The polygon to extrude lies in the z==0 plane, and
is given as a list of (x,y) pairs on the
standard input (-), or from the file
vfile,
or on the command line preceded by the number of vertices,
N.
The order of the vertices and the extrusion vector
lvect
(default (0,0,1)) determine the surface orientations.
The surfaces that make up the prism will be modified by
mat
and their identifiers will begin with
name.
The
-r
option may be used to round the corners of the object using spheres
and cylinders.
The
-c
option inhibits generation of a face connecting the last vertex to the first.
The
-e
option inhibits generation of the end polygons.
EXAMPLE
To produce a equilateral triangular prism:
-
genprism clear_plastic prism 3 0 0 .5 .866 1 0
AUTHOR
Greg Ward
BUGS
The rounding option only works for opaque prisms with outward facing
normals.
If the normals face inward, the appearance will be bizarre.
