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Constrain Objects Geometrically
Geometric constraints determine the relationships between 2D geometric
objects or points on objects relative to each other.
Overview of Geometric Constraints
NOTE This topic has been included for AutoCAD-compatibility purposes only. In
AutoCAD LT, parametric drawing technology is limited to displaying and hiding
constraints, editing constrained geometry, and changing values at the Command
prompt.
You can specify geometric constraints between 2D objects or points on objects.
When you later edit the constrained geometry, the constraints are maintained.
Thus, using geometric constraints, you have a method of including design
requirements in your drawing.
For example, in the illustration below, the following constraints are applied
to the geometry.
Every endpoint is constrained to remain coincident with the endpoint of
every adjacent object—these constraints are displayed as small blue squares
The vertical lines are constrained to remain parallel with each other and
to remain equal to each other in length
The left vertical line is constrained to remain perpendicular to the
horizontal line
The horizontal line is constrained to remain horizontal
The location of the circle and the horizontal line are constrained to remain
fixed in space—these constraints are displayed as lock icons
NOTE The locked geometry is not associated to the other geometry without
geometric constraints linked to it.
Add Constraints to Geometry | 251
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