finding tangent to projection of 3d spline is impossible?

[Anonymous]

LS

I drew a control point spline in a 3d sketch, the spline represents basically a straight line with two perpendicular curves in it. Now I want to find the tangent to the spline. Realizing there are two of them I projected the spline in a xy-plane. I expect to be able to find the tangent in any point of the projected line. After I select the spline the symbol for tangent gets highlighted in the menu bar but I cannot select the projected line. I can select the line representing the tangent. See attached picture. 

Please advice,

thanks. 

[g-andresen]

Hi,

1. are you sure creating a controlpoint spline > what I see is a fit point spline

2. contolpoint splines don´t have tangent handles

3. please share your design:
File   > export > save as f3d locally > attach to nest post

günther

[jeff_strater · Accepted solution]

direct spline tangency is only supported at curve endpoints.  You can get around this for a fit point spline, but only at those fit points by making a line that is parallel to the tangent handle of that fitpoint.

[Anonymous]

thank you both, Günther and Jeff! I have to find a workaround then. Too bad to hear that basic functionality is not supported though. 

thanks anyway,

cheers!