2011

Table Of Contents
SURFPATCH
Creates a new surface by fitting a cap over a surface edge that forms a closed
loop.
SWEEP
Creates a 3D solid or surface by sweeping a 2D or 3D object or subobject
along a path.
System Variables
SURFACEMODELINGMODE
Controls whether surfaces are created as procedural surfaces or NURBS
surfaces.
Using the Spline tool to create NURBS Surfaces and Splines
See also:
Draw Splines on page 281
Modify Splines on page 359
The spline tool is optimized to work with NURBS modeling
NURBS surfaces can be created from a number of 2D objects, including edge
subobjects, polylines, and arcs. But the spline tool is the only object that has
options that are compatible with creating NURBS surface. Not only do splines
consists of Bezier arcs, but they also can be defined with both control vertices
and fit points. The fit points and control vertices offer different editing options
such as knot parameterization and degree options.
Moving Fit Points vs. Moving Control Vertices
NURBS curves have both fit points and control vertices. The fit points lie on
the line, and the control vertices lay outside the line. Use fit points to make
a change to one small part of a curve; use control vertices to make changes
that will affect the shape of the curve as a whole.
504 | Chapter 22 Create 3D Models