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 location
that is perpendicular or parallel to another object. In the example below, an offset
surface is locked in a position that is parallel to its original surface.

Constraints are applied to the 2D profile object used to create the surface, not to
the surface itself. Use selection cycling to be sure that you are selecting the profile
curve and not the surface or the edge subobject.

Use Mathematical Expressions to Derive Surface Properties

Dimensional constraints are user-defined expressions that are applied in the Properties
palette for that surface.

You use the same types of operators and expressions that are used for other types
of geometric constraints. The type of properties that can be restrained is different
for each surface type.

Learning AutoCad

e geometric constraints to constrain and restrict surfaces, and use mathematical expressions to derive surface properties. Use Geometric Constraints with …About Creating Geometric Relationships Between Associative Surfaces …Create Geometric Relationships between Associative Surfaces. … Use geometric constraints to constrain and restrict surfaces. And use mathematical …About Creating Geometric Relationships Between Associative Surfaces …surfaces and 3D solids from 2D geometry by extruding, … Open curves always create surfaces, but closed curves can create either solids or … An associative surface if the SURFACEASSOCIATIVITY system variable is on. … Extends the contours of a shape between one or more open or closed objects.About Creating Geometric Relationships Between Associative Surfaces …