GENREV

NAME
SYNOPSIS
DESCRIPTION
EXAMPLE
AUTHOR
BUGS
SEE ALSO

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

genbox(1), gensurf(1), genworm(1), icalc(1), rpict(1), rvu(1), xform(1)