Three days of trying to create a dynamic figure in the other figures, it does not work.
Using THREE.ExtrudeGeometry, turned:

But the “tail” should be the radius:

None of the parameters ExtrudeGeometry not allow him to do.
Draw in the 3D editor and then figure this place it will not work because, as the size has to dynamically changes
How to implement it?
Or how to glue two planes, a set of arcs and make the whole figure?
http://f4.s.qip.ru/cMfvUhCj.png http://f4.s.qip.ru/cMfvUhCj.png
bevelSize : -4
Result:
code…