NAME¶
genrev - generate a RADIANCE description of surface of revolution
SYNOPSIS¶
genrev mat name 'z(t)' 'r(t)' nseg [
-e expr ][
-f file ][
-s ]
DESCRIPTION¶
Genrev produces a RADIANCE scene description of a surface of revolution.
The object will be composed of
nseg cones, cups, cylinders, tubes or
rings following the parametric curve defined by
z(t) (height) and
r(t) (radius). When
z is increasing with t, the surface normal
points outward. When
z is decreasing, the normal points inward. The
variable
t used in the function expressions varies from 0 to 1 in even
steps of
1/nseg. The expressions are of the same type used in RADIANCE
function files. Auxiliary expressions and/or files may be specified in any
number of
-e and
-f options. The
-s option smooths the
surfaces using Phong normal interpolation.
EXAMPLE¶
To generate a torus with an inner radius of 1 and an outer radius of 3:
-
- genrev steel torus 'sin(2*PI*t)' '2+cos(2*PI*t)' 32
AUTHOR¶
Greg Ward
BUGS¶
The -s option doesn't modify the surface normal correctly for the opposite side.
SEE ALSO¶
genrbox(1),
gensurf(1),
genworm(1),
icalc(1),
rpict(1),
rvu(1),
xform(1)
