<<<By the way, if you draw a tangent to your curve and make an path array you will have your tangents very quick.>>>

Thanks for the useful tip, Karsten.



To my dispute with TPA, software developer of CAVACAD. Think they're mad at me now. Narcotini wrote:
"Never contact TPA again."
(Because the software is so old, and as a developer it is serious in his eyes not to waste any more thoughts on it).

Better I don't tell my wife, because we have been married for more than 25 years:).....

Franz
just alone, without TPA