Understanding Geometric Constraints

Geometric Constraints define relationships that force dependencies and limitations between entities.

There are two types of Geometric Constraints: those that act on a single geometric entity and those that define a relationship between two geometric entities.  For example, the Fix, Horizontal, and Vertical Geometric Constraints act on a single entity, whereas Perpendicular, Parallel, Tangent, and others control two entities.

You can apply Geometric Constraints to 2D entities only.

Constraint Points

When you use a Geometric Constraint command and move the cursor over an entity, selectable constraint points are indicated with an icon .

This table lists the entity types to which you can apply Geometric Constraints. Also, it outlines valid constraint points per entity type:

This table lists the entity types that can have Geometric Constraints.

Constraint Bars

Constraint bars group together the Geometric Constraints icons associated with an entity.

Example:

The constraints bar above shows that a horizontal, parallel constraint, collinear, and symmetric constraint are defined for a linear entity.

You can show or hide individual constraint bars, or show or hide them all. Also, you can relocate constraint bars to their default position. See: Controlling the Visibility of Geometric Constraint Icons.