Added is a small part of a bigger model where there are 2 lines, a and b, and a flexible curve c.
Line d is at the shortest distance between the part of curve c at the righthand side of point B and line a.
See sketch 1.
But when the form of curve c is changed in such a way that the shortest distance and so line d become equal to A-B as shown in sketch 2, line b should be offset a certain distance from point B to the right as shown in sketch 3.
The point is that I can’t find a way to make the offset work when point D=B.
I tried dispatch and other ways, but still don’t see the light.
Anyone who can help me?