About-Modifying-Geometrically-Constrained-Objects

About Modifying Geometrically Constrained Objects

About Modifying Geometrically Constrained Objects

You can edit geometrically constrained objects using grips, editing commands, or by
relaxing or applying geometric constraints.

By definition, geometric constraints that are applied to geometric objects limit
the editing actions that you perform on the objects.

Modify Constrained Objects with Grips

You can modify constrained geometry using grip editing modes. The geometry will maintain
all applied constraints.

For example, if a line object is constrained to remain tangent to a circle, you can
rotate the line and change its length and endpoints, but the line or its extension will remain tangent to the circle.

If the circle was an arc instead, the line or its extension would remain tangent to the arc or its extension.

The results of modifying underconstrained objects are based on what constraints have
already been applied and the object types involved. For example, if the Radius constraint
had not been applied, the radius of the circle would have been modified instead of
the tangent point of the line.

The CONSTRAINTSOLVEMODE system variable determines the way an object behaves when
constraints are applied or when grips are used to edit it.

Best Practice

You can limit unexpected changes by applying additional geometric or dimensional constraints
such as coincident and fix constraints.

Modify Constrained Objects

You can use commands such as MOVE, COPY, ROTATE, SCALE, and STRETCH to modify constrained
geometry while maintaining the constraints applied to the objects. Commands such as
TRIM, EXTEND, BREAK, and JOIN can remove constraints in some circumstances.

NOTE:By default, if an editing command results in copying the constrained objects, the
constraints applied to the original objects will also be duplicated. This behavior
is controlled by the PARAMETERCOPYMODE system variable. Using the copying technique,
you can save work by taking advantage of multiple instances of objects, bilateral
symmetry, or radial symmetry. This feature is not available in AutoCAD LT.

Learning AutoCad

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