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greg |
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.\" RCSid "$Id" |
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.TH GENWORM 1 11/15/93 RADIANCE |
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.SH NAME |
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genworm - generate a RADIANCE description of a functional worm |
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.SH SYNOPSIS |
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.B "genworm mat name 'x(t)' 'y(t)' 'z(t)' 'r(t)' nseg" |
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[ |
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.B "\-e expr" |
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][ |
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.B "\-f file" |
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] |
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.SH DESCRIPTION |
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.I Genworm |
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produces a RADIANCE scene description of a |
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worm defined by the parametric equations |
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.I x(t), |
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.I y(t), |
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.I z(t), |
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and |
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.I r(t) |
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(the radius). |
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.I T |
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will vary from 0 to 1 in steps of |
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.I 1/nseg. |
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The surface will be composed of |
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.I nseg |
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cones or cylinders and |
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.I nseg+1 |
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spheres. |
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The expressions are of the same type used in RADIANCE |
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function files. |
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Auxiliary expressions and/or files may be specified |
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in any number of |
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.I \-e |
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and |
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.I \-f |
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options. |
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.SH EXAMPLE |
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To generate a banana: |
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.IP "" .2i |
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genworm yellow banana '0' '5*sin(t)' '5*cos(t)' '.4-(.5-t)*(.5-t)' 20 |
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.SH AUTHOR |
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Greg Ward |
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.SH BUGS |
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Since the worm is constructed of intersecting surfaces, only |
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opaque materials should be used with this object. |
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Also, a worm cannot double back inside itself without making a mess. |
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.SH "SEE ALSO" |
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calc(1), genbox(1), genrev(1), gensurf(1), rpict(1), rview(1), xform(1) |
