How to draw a tangent line to a B-Spline curve (Approximate Method)

[GIOV]

1.-Draw a B-Spline curve using B-Spline by reference point;


2.-Do the last 2 points near applying dimension;

3.-Draw a reference line between both points ;

4.- Now, draw a line witch start from the last B-Spline Point and apply co-linear constrain between this line and the reference line;

5.- Edit the dimension to the minimal feasible (mathematical Limit concept);

6.-Now click "select" and move the line to make sure that still is tangent to the B-Spline.
(some point may needs coincident constraint).

I hope this help.
GIOV

 

[GIOV]

This method has better behavior in ADV11.2 than the last one which is in my other laptop.