Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
G-VRML(1)			 User Commands			     G-VRML(1)

       g-vrml -	Perform	Boolean	evaluations to produce a VRML version 2.0 file

       g-vrml [-v] [-d calc_dist_tol] [-a abs_tess_tol]	[-n norm_tess_tol]
	      [-r rel_tess_tol]	[-x librt_debug_flag] [-X NMG_debug_flag]
	      [-u units_name] [-o outfile] infile.g object(s)

       g-vrml performs the Boolean operations specified	in any regions in the
       specified object(s) and writes the resulting NMG	objects	to outfile or
       to stdout if the	-o option is not used. The output is in	VRML version
       2.0 format. The -v option requests verbose output while the conversion
       is taking place.	The -d option specifies	a calculational	distance
       tolerance (in millimeters). This	tolerance is used to distinguish
       neighboring vertices. Any two vertices less than	this tolerance
       distance	apart will be considered the same vertex. The default value is
       0.005mm.	Prior to performing the	Boolean	operations for each region,
       the involved primitive solids are converted to a	planar facetted
       approximation and stored	as NMG solids. This tessellation can be
       controlled using	the tessellation tolerances. The -a option may be used
       to specify an absolute tessellation tolerance (in millimeters). This
       requires	that the maximum absolute error	from the tessellated surface
       to the actual surface must not be greater than abs_tess_tol. The	-n
       option specifies	a surface normal error tolerance (in degrees) for the
       tessellation. The -r option may be used to set a	relative error
       tolerance. This effectively sets	an absolute tolerance for each
       primitive solid by multiplying the overall size of the solid by
       rel_tess_tol. The -x and	-X options are used to set debug flags for
       librt and the NMG routines respectively.	The definitions	of these flags
       may be found in raytrace.h and nmg.h. The -u option can be used to set
       the units for the resulting VRML	file (the default is mm). Any units
       name that MGED accepts will work	here.

       The -b option provides BOT dump,	and the	-e option provides evaluation
       of all CSG and BOTs. They are mutually exclusive.

	   $ g-vrml -o shell.wrl sample.g sample_object

       Error messages are intended to be self-explanatory.

       BRL-CAD Team

       This software is	Copyright (c) 1998-2019	by the United States
       Government as represented by U.S. Army Research Laboratory.

       Reports of bugs or problems should be submitted via electronic mail to

BRL-CAD				  11/05/2021			     G-VRML(1)


Want to link to this manual page? Use this URL:

home | help