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.\" RCSid "$Id: genbox.1,v 1.4 2007/09/04 17:36:40 greg Exp $" |
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.TH GENBOX 1 11/15/93 RADIANCE |
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.SH NAME |
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genbox - generate a RADIANCE or Wavefront description of a box |
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.SH SYNOPSIS |
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.B "genbox mat name xsiz ysiz zsiz" |
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[ |
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.B \-i |
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][ |
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.B "\-b bev" |
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| |
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.B "\-r rad" |
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[ |
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.B "\-n nseg |
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] |
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][ |
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.B \-o |
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] |
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.SH DESCRIPTION |
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.I Genbox |
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produces a RADIANCE scene description of a parallelepiped |
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with one corner at the origin and the opposite corner at |
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.I "(xsiz, ysiz, zsiz)." |
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The sides of the box will be parallel to the three coordinate |
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planes. |
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The surfaces that make up the box will be modified by |
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.I mat |
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and their identifiers will begin with |
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.I name. |
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.PP |
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The |
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.I \-i |
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option can be used to produce a box with inward directed surface |
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normals. |
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.PP |
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The |
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.I \-b |
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option can be used to specify the indentation for beveled edges. |
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.PP |
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The |
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.I \-r |
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option can be used to specify the radius for rounded edges, which |
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are modeled as cylinders and spheres for non-inverted RADIANCE output. |
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However, this type of model only makes sense for external views of |
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an opaque object. |
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If a rounded box is inverted using |
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.I \-i, |
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then the corners and edges are modeled with polygons, instead. |
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This option can also be forced by specifying a minum number of |
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segments with the |
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.I \-n |
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option. |
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.PP |
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The |
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.I \-o |
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option specifies Wavefront .OBJ output, and |
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also forces polygons to be used with the |
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.I \-r |
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option. |
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In this case, vertex normals are also produced for smooth rendering. |
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.SH EXAMPLE |
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To produce a rectangular box made of wood with rounded edges: |
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.IP "" .2i |
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genbox wood box1 5 8 3 \-r .5 > box1.rad |
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.PP |
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To produce a box made of crystal with beveled edges: |
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.IP "" .2i |
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genbox crystal box2 3 7 1 \-b .1 > box2.rad |
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.SH AUTHOR |
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Greg Ward |
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.SH BUGS |
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Because spheres and cylinders are used to construct boxes with |
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rounded edges, a transparent box of this type appears quite messy. |
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The preferred alternative in this case is the |
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.I \-n |
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option, which produces polygons, instead. |
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However, normal smoothing is only applied to the Wavefront .OBJ output, |
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so this must be passed through |
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.I obj2rad |
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to get perfectly smooth results. |
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.SH "SEE ALSO" |
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genrev(1), gensurf(1), genworm(1), obj2mesh(1), obj2rad(1), |
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robjutil(1), rpict(1), rvu(1), xform(1) |
