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)