forummsgid127550edit
Original date:20150402 04:22:20 Edited by: Shian_Lee Subject: Re: Good documentation (arc length?)
Special request from Tom or anyone else:
I would like to know the way to calculate the length of an arc.
There are many ways to do it, but unfortunately the last time I applied to work for NASA I was rejected. I guess that I'm not good enough.
So, what I need is: an accurate, simple, fast, practical, proven way to calculate the length of an arc.
I already found my own way to do it, when I wrote the program for an iron cutting machine. But, obviously there is a better way.
I've tried all those formulas from the Internet  but the most accurate formulas gave me really strange results that I could not understand (it might be good for flying to the moon, but not really what I needed). Other formulas gave me not accurate results.
The cutting machine has to move exactly between each 0.1mm points of an arc, so I needed a good formula for this.
The best thing that could happen is if an accurate formula was included as a code example for sin() or cos()  since it's a very useful task, but seems to be an impossible mission.
I hope that I don't talk nonsense here.
Thank you.
ps: I forgot to mention that important part of the MSQuickBasic documentation was a directory of valuable exampleprograms.
EDIT: BTW, I was looking now in Wikipedia, it seems that lots of new articles were written since the time that I was looking for ArcLength. Yet, I'm still wondering if those new(?) formulas are accurate enough.
Not Categorized, Please Help
