Topics in this section

• Overview of Geometric Constraints in Dynamic Blocks
• Automatically Constrain a Block Definition

  You can automatically apply geometric constraints to the objects in the block definition.

• Add a Coincident Constraint

  A coincident constraint forces two points, or a point and line, to coincide.

• Add a Colinear Constraint

  A colinear constraint forces two lines to follow the same infinite line.

• Add a Concentric Constraint

  A concentric constraint forces selected circles, arcs, or ellipses to maintain the same center point.

• Add a Fixed Constraint

  A fixed constraint fixes a point or curve to a specified location and orientation relative to the World Coordinate System (WCS).

• Add a Parallel Constraint

  A parallel constraint forces two lines to remain parallel to each other.

• Add a Perpendicular Constraint

  A perpendicular constraint forces two lines or polyline segments to maintain a 90-degree angle to each other.

• Add a Horizontal Constraint

  A horizontal constraint forces a line or pair of points to remain parallel to the X-axis of the current UCS.

• Add a Vertical Constraint

  A vertical constraint forces lines of pairs of points to remain parallel to the Y-axis of the current UCS.

• Add a Tangent Constraint

  A tangent constraint forces two curves to maintain a point of tangency to each other or their extensions.

• Add a Smooth Constraint

  A smooth constraint forces a spline to maintain geometric continuity with another spline, line, arc, or polyline.

• Add a Symmetric Constraint

  A symmetric constraint forces two curves or points on an object to maintain symmetry about a selected line.

• Add an Equal Constraint

  An equal constraint forces two lines or polyline segments to maintain equal lengths or arcs.