2013

Table Of Contents
Create Geometric Relationships between Associative
Surfaces
Use geometric constraints to constrain and restrict surfaces. And use
mathematical expressions to derive surface properties.
Use Geometric Constraints with Surface Profiles
Just as with 2D drafting, geometric constraints can be used to restrict the
movement of 3D surfaces. For example, you can specify that a surface remain
fixed in a perpendicular or parallel location to another object. In the example
below, an offset surface is locked in a parallel position to its original surface.
Constraints are applied to the 2D profile object used to create the surface, not
the surface itself. Use selection cycling to be sure that you are selecting the
profile curve and not the surface or the edge subobject. See
Apply or Remove
Geometric Constraints
(page 285).
Use Mathematical Expressions to Derive Surface Properties
Dimensional constraints are user-defined expressions that are applied in the
Properties Inspector for that surface.
For a complete list of operators and functions allowed in expressions, see
Control Geometry with Parameters (page 302). The following table lists the
surface types and their properties that accept expressions
Surface properties that can be constrained.Type of Surface
Bulge MagnitudeBlend Surface
Extension DistanceExtend Surface
Extruded Surface
Height
Create 3D Models | 381