Constrains points or entities to a fixed position. (This command is equivalent to using the Fix option of the GeomConstraint command.)
Note: This command constrains
- Point - one end of the entity is fixed in place; for instance, one end of a line is fixed in place, but the other end can still be moved
- Entity - the entire entity is fixed in place and cannot be moved
Accessing the Command
command bar: gcfix
menu bar: Assembly | 2D Constraints | Fix
ribbon: Parametric | 2D Constraints | Fix
toolbar: 2D Constraints |
Prompts you in the command bar:
Select point or [Entity]: (Select a valid constrain point, or else enter E)
Select a valid constraint point on an entity:
The selected point on the entity is fixed in place, and so can no longer be moved.
Places the constraint on a valid constraint entity:
The position of the entity cannot be moved any more, although you can modify the length of, say, a line or polyline segment in either direction.
After you place the constraint, icons appear near the entities indicating the type of constraint. If you do not see them, then use the ConstraintBar command to display them.
Pause the cursor over one of the icons to see the location of the constraint, shown as a large X:
To remove a constraint, click the tiny x on the constraint bar.
GeomConstraint - applies geometric relationships between entities and/or points on entities.
Dimconstraint - applies a dimensional constraint to an entity or between constraint points on entities; converts associative dimensions to dynamic dimensions.
GcCoincident - applies a coincident geometrical constraint to two points or constrains a point to an entity.
GcCollinear - forces lines to be collinear.
GcConcentric - constrains the center points of circles, arcs, ellipses or elliptical arcs to coincide.
GcEqual - constrains arcs and circles to the same radius, or lines to the same length.
GcHorizontal - constrains lines or pairs of points to lie parallel to the X-axis of the current coordinate system.
GcParallel - forces two lines to be parallel to each other.
GcPerpendicular - constrains two lines to lie perpendicularly to each other.
GcSmooth - forces a spline to maintain fluid geometric continuity with another spline, line, arc or polyline.
GcSymmetric - constrains two entities or points to lie symmetrically with respect to a selected line.
GcTangent - constrains two entities to maintain a point of tangency to each other or their extensions.
GcVertical - constrains lines or pairs of points to lie parallel to the Y-axis of the current coordinate system.
ConstraintBar - controls the display of the constraint bar of entities.
Delconstraint - removes all dimensional and geometrical constraints from an entity.