ellipse again hi everyone because no one has touched the problem i posted last week i guess my question was not so clear now i d like to describe it in detail the offset of an ellipse is the locus of the center of a circle which rolls on the ellipse in other words the distance between the ellipse and its offset is same everywhere this problem comes from the geometric measurement when a probe is used the tip of the probe is a ball and the computer just outputs the positions of the ball s center is the offset of an ellipse still an ellipse the answer is no ironically dmis an american indutrial standard says it is ellipse so almost all the software which was implemented on the base of dmis was wrong the software was also sold internationaly imagine how many people have or will suffer from this bug how many qualified parts with ellipse were will be discarded and most importantly how many defective parts with ellipse are will be used i was employed as a consultant by a company in los angeles last year to specially solve this problem i spent two months on analysis of this problem and six months on programming now my solution nonlinear is not ideal because i can only reconstruct an ellipse from its entire or half offset it is very difficult to find the original ellipse from a quarter or a segment of its offset because the method i used is not analytical i am now wondering if i didn t touch the base and make things complicated please give me a hint i know you may argue this is not a cg problem you are right it is not however so many people involved in the problem sphere from poits why not an ellipse and why not its offset please post here and let the others share our interests i got several emails from our netters they said they need the summary of the answers yeh usc
