Extending Curves Controlling the Extension Mode

1 After starting the Extend Curve command, choose the extension mode in the Mode drop-down list:
 
Point The part of the curve at the selected endpoint is extended to the point indicated or its projection according to the Continuity By: option selected.
Boundary The part of the curve at the selected endpoint is extended as far as its intersection with another selected entity according to the Continuity By: option selected.
Length The part of the curve at the selected endpoint is extended as far as the specified length, according to the Continuity By: option selected.


Point: extension to a specified position
2 Click on all the curves you want to extend close to the endpoint to be modified (intersections might not be found if the selection point does not identify the endpoint: a warning would be displayed).



If the selected curve is a specialized curve (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). End selection by right-clicking and selecting Continue in the context menu.
 
3 Specify the point you want the curve to be extended to (by simply clicking on a position or using a snap command).


 
4 Set Continuity By: to Tangency.
 
5 Click or to confirm your selections and extend the curve.



Click to discard your changes.

 

Boundary: extension as far as a selected limit entity
2 Click on all the curves you want to extend close to the endpoint to be modified (intersections might not be found if the selection point does not identify the endpoint: a warning would be displayed)



If the selected curve is a specialized curve (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). End selection by right-clicking and selecting Continue in the context menu.
 
3 Select the limit entity.


 
4 Set Continuity By: to Tangency.
 
5 Click or to confirm your selections and extend the curve.



Click to discard your changes.

 

Length: extension by a specified length
2 Click on all the curves you want to extend close to the endpoint to be modified (intersections might not be found if the selection point does not identify the endpoint: a warning would be displayed).



If the selected curve is a specialized curve (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). End selection by right-clicking and selecting Continue in the context menu.
 
3 In the Length mini-dialog box, type the length value of the extension to be applied to the curve.

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4 Set Continuity By: to Tangency.
 
5 Click or to confirm your selections and extend the curve.



Click to discard your changes.