genrev - generate a RADIANCE description of surface of revolution
genrev mat name ’z(t)’ ’r(t)’ nseg [ -e expr ][ -f file ][ -s ]
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 variable and function definitions in each -f source file are read and compiled from the RADIANCE library where it is found. The -s option smooths the surfaces using Phong normal interpolation.
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)’ ’2+cos(2*PI*t)’ 32 |
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RAYPATH |
the directories to check for auxiliary files. |
Greg Ward
genbox(1), gencat(1), genprism(1), gensurf(1), genworm(1), rcalc(1), rpict(1), rvu(1), xform(1)