About-Inferring-Geometric-Constraints

About Inferring Geometric Constraints

About Inferring Geometric Constraints

You can automatically apply geometric constraints while creating and editing geometric
objects.

Enabling Infer Constraints mode automatically applies constraints between the object you are creating or editing,
and the object or points associated with object snaps. Similar to the AUTOCONSTRAIN
command, constraints are applied only if the objects meet the constraint conditions.
Objects are not repositioned as a result of inferring constraints.

With Infer Constraints turned on, the object snaps that you specify when creating
geometry are used to infer geometric constraints. However, the following object snaps
are not supported:

  • Intersection
  • Apparent Intersection
  • Extension
  • Quadrant

The following constraints cannot be inferred:

  • Fix
  • Smooth
  • Symmetric
  • Concentric
  • Equal
  • Collinear

Infer Constraints with Line and Polyline

Certain object creation and editing commands can infer constraints regardless of the
current object snap settings.

LINE and PLINE commands infer coincident point-to-point constraints. The Close option infers a coincident constraint between the start point
of the first line and the endpoint of the last line.

Infer Constraints with Rectangle, Fillet, and Chamfer

The RECTANG, FILLET, and CHAMFER commands infer constraints as follows:

  • RECTANG applies a pair of parallel constraints and a perpendicular constraint to the
    closed polyline.
  • FILLET applies tangent and coincident constraints between the newly created arc and
    the existing trimmed or extended pair of lines.
  • CHAMFER applies coincident contraints between the newly created line and the existing
    trimmed or extended pair of lines.

The following commands are unaffected by the Infer Constraints setting:

  • SCALE
  • MIRROR
  • OFFSET
  • BREAK
  • TRIM
  • EXTEND
  • ARRAY

Infer Constraints with Move, Copy, and Stretch

When moving, copying, or stretching with the Infer Constraints on, you can apply coincident,
perpendicular, parallel, or tangent constraints between the object being edited and
the object being snapped to if the base point of the edited object is a valid constraint
point of that object.

For example, if a line is stretched and snapped to an endpoint of another line, a
coincident constraint is applied between the endpoints of the two lines.

A vertical or horizontal constraint can be applied between objects when you move,
copy, or stretch an object from a valid constraint point while object tracking vertically
or horizontally along a valid constraint point on another object.

Learning AutoCad

spmilar to the AUTOCONSTRAIN command, constraints are applied only if the objects meet the constraint conditions. Objects are not repositioned as a result of inferring constraints. With Infer Constraints turned on, the object snaps that you specify when creating geometry are used to infer geometric constraints.6 Jun 2011… The fold geometry was used to infer the fault geometry and loading responsible for the folding using the Boundary Element Model, Poly3D.… To turn off geometric constraints, on the command line in AutoCAD, … in the Geometric tab, uncheck the box for “Infer geometric constraints.”.… We'll begin with Geometric Constraints wh. … Finally, we'll take a look at Auto Constrain and Inferring Constraints and some of the benefits and …