Creating a Lofted surface through a curve and tangent to a surface

Given a a curve a and a surface, like the ones in the following illustration:



You may need to create a surface tangent to the existing surface and through the curve:



You can proceed as described below.

1	Load file "DesignAids_UC_tang.e3" and start the Tangent Plane command.
2	Select the First Point on the curve as shown in the illustration below:
3	In the First U mini-dialog box, set the value to 0 (i.e: the first end point of the curve).
4	Select the Second Point on the surface as shown in the illustration below:
5	When the preview is displayed, under More Options set Second surface vector to Tangent V
6	The preview changes as follows: Double-click on the handle shown in the following illustration to invert the orientation of the line: and you will get the following:
7	Uncheck the With plane box to get a clearer view of the tangent line to the curve and to the surface:
8	Select to create the line
9	Now you can go on creating new lines just by modifying the value in the First U mini-dialog box: and selecting : Go on supplying new values. The higher the number of lines you create, the more accurate the resulting surface you will obtain as a result.
10	Once you have created a certain number of lines: start the Lofted Surface command: and select the lines (clicking close to their upper end point) as Boundary Set A:
11	Select to create the surface and quit the command.