Graphics Programs Reference
In-Depth Information
Summary
Besides modeling with solids, for some projects, surfaces can be useful. This chapter
includes all commands related to surfaces and meshes, objects that do not have
thickness. We started by identifying all categories that were developed in the chapter.
Besides the
EXTRUDE
,
REVOLVE
,
SWEEP
, and
LOFT
commands (presented in
sions
), several other procedural surfaces commands are available, which are as fol-
low:
•
SURFNETWORK
: This command is used to create a surface from two sets
of linear objects
•
SURFBLEND
: This command is used to create a surface connecting two
existing surfaces
•
SURFPATCH
: This command is used to create a surface that closes a hole
or an opening
•
SURFEXTEND
: This command is used to create a surface by extending ex-
isting surfaces from selected edges
•
SURFOFFSET
: This command is used to create surfaces parallel to the se-
lected surfaces
•
SURFFILLET
: This command is used to create a fillet surface between two
existing surfaces
To edit procedural surfaces, the commands, such as
SURFTRIM
, which is used to cut
surfaces with other surfaces, linear objects, or regions and
SURFUNTRIM
, which is
used to restore trimmed surfaces were presented. In this category, the
SURFSCULP
command is included, allowing to create a solid from a closed volume.
NURBS surfaces are mainly used for free-form modeling, and can be created by
the
CONVTONURBS
command or any surface creation method, having the
SURFACEMODELINGMODE
system variable value
1
. There are several commands to
edit NURBS surfaces, such as
3DEDITBAR
, which helps moving points and changing
direction and magnitude,
CVSHOW
and
CVHIDE
, which are used to turn on and off con-
trol points visualization,
CVADD
and
CVREMOVE
, which are used to add and remove
control points, and
CVREBUILD
, which is used to recalculate surfaces.
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