Constraints > G1 and G2 Continuity

This constraint is automatically created, upon applying a smoothness of a spline in endpoints snapped to other graphic lines. These constraints are indicated by icons (G1 Continuity) or (G2 Continuity), in accordance with the type of the applied smoothness, near constrained points. These constraints allow you to maintain smoothness between a spline and another curve (including another spline) when editing a spline or a curve.

These constraints are created, only if the Infer Constraints mode is enabled in the snapping toolbar during applying a smoothness. If the constraints were not created initially during applying a smoothness, then they couldn't be created later manually or using the Find and Infer Constraints command.

Example

Spline with smoothness constraints

In Infer Constrains mode, create an arc to the left of the spline, and another spline to the right of the spline. Two Coincident constraints were automatically created. Let us create the smoothness of G1 for the extreme left point of the spline, and the smoothness of G2 for the extreme right point. Two constraints of G1 Continuity and G2 Continuity were created automatically. Now when editing sketch lines, the conditions defined by smoothness will always be met.