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genrev (1)
NAME
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genrev - generate a RADIANCE description of surface of revolution |
SYNOPSIS
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genrev mat name 'z(t)' 'r(t)' nseg [ -e expr
][ -f file ][ -s ] |
DESCRIPTION
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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
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To generate a torus with an inner radius of 1 and an outer
radius of 3: |
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genrev steel torus 'sin(2*PI*t)' '1+cos(2*PI*t)'
32 |
AUTHOR
BUGS
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The -s option doesn't modify the surface normal correctly
for the opposite side. |
SEE ALSO
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