iges-g — IGES Translator (IGES CSG to BRL-CAD)
solid_name] [-b ] [ -n |
t ] -o
converts the specified
to a BRL-CAD
file. The IGES file is expected to conform to IGES 5.1.
option specifies that all rational B-spline surfaces in the IGES file should be
combined into one BRL-CAD spline solid.
option indicates that IGES drawings should be converted to BRL-CAD NMG objects.
Theses objects will be two-dimensional drawings, not solids.
option is the same as the
option except the final projection into 2D is not performed. This may produce 3D drawings
in cases where the drawings have been produced from a 3D model.
option requests all the trimmed surfaces in the IGES file be converted to
a single BRL-CAD NMG solid.
option provides a name to be used for the single solid created under the
options, and is ignored for other options.
option indicates that BREP objects should be converted to NMG solids rather than the default BOT solids.
options allow the setting of debug flags for the NMG routines and the rt library
The absence of any of the
options results in the default behavior where
all IGES CSG and planar face BREP objects are converted to BRL-CAD
equivalents. Most conversions are exact, with the exceptions of the solid of
revolution and the solid of linear extrusion. These solids do not exist in BRL-CAD
and are therefore approximated. The solid of revolution is built from a series of
truncated right cones developed by approximating the curve to be revolved with a series
of straight line segments. The extrusion is similarly handled by approximating the
curve to be extruded with straight line segments and using that to build a BRL-CAD
Planar faced IGES BREP objects are converted to BRL-CAD NMG structures.
The Initial Graphics Exchange Specification (IGES) Version 5.1, IGES/PDES Organization, September 1991
This software is Copyright (c) 1991-2016 by the United States Government as represented by U.S. Army Research Laboratory.