Setting Positional Continuity between curves

Once you have started the Curve Continuity command, proceed as follows.

1 In the Degree: drop-down list, select Positional to apply positional continuity to the two curves you are going to select, so that they meet at an endpoint.
2 In the Method drop-down list, select the method you want to use to apply the change.
Fit reference curve to apply positional continuity by modifying only one of the two entities concerned (the one to be selected as Curve to Be Modified — the other one, used as a reference , can also be a surface boundary).
Adjust both by modifying both the curves concerned.
Fit reference curve

The Fit reference curve method applies positional continuity by modifying only one of the two curves concerned (the one to be selected as Curve to Be Modified— the other one , used as a reference , can also be a surface boundary).

3 Click on the curve you want to change at a point close to where you want the two curves to meet.



If the selected curve is a specialized curve and not a NURBS, you are asked to confirm whether you want to convert it into a NURBS (unless you have deselected the Ask before converting check box). If the selected curve is a line, it will not be converted to a NURBS, despite the warning message you have received.

Tolerance for converting into NURBS

You can control the way the curve is converted by setting a suitable Tolerance:. The lower the tolerance value, the more accurate the resulting NURBS will be and, hence, the more control points it will have.

To change the selected curve, right-click on Curve to Be Modified, select Reset in the context menu and perform selection again.
4 Click on the curve you do not want to change at a point close to where you want the two curves to meet.



Extending a curve to a point

Instead of selecting a curve, you can indicate a point: the curve you want to modify will be extended as far as that point.

To change the selected curve/point, right-click on Reference point or curve endpoint, select Reset in the context menu and perform selection again.
5 Click or to confirm your selections and modify the curve.



Click to discard your changes.
Adjust both

The Adjust both applies positional continuity by modifying both curves.

3 Click on each of the two curves at a point close to where you want them to meet.



If the selected curve is a specialized curve and not a NURBS, you are asked to confirm whether you want to convert it into a NURBS (unless you have deselected the Ask before converting check box).

Tolerance for converting into NURBS

You can control the way the curve is converted by setting a suitable Tolerance:. The lower the tolerance value, the more accurate the resulting NURBS will be and, hence, the more control points it will have.

To change the selected curve, right-click on Curve to Be Modified, select Reset in the context menu and perform selection again.
4 In the 1st Weight and 2nd Weight mini-dialog boxes, type the values of the weights of the two curves.



Weights
Each curve can be associated with a numeric value — its weight — which indicates how much the curve is to be modified relative to the other. The higher the weight, the less the curve changes. If the weight of a curve is zero, the other curve is not modified at all. The weight of a curve is a value between 0 and 1.


5 Click or to confirm your selections and modify the curve.



Click to discard your changes.