Fitting circle in a boundary

Question

Fitting circle in a boundary

mailpulak (Mechanical)

(OP)

18 Nov 10 18:29

I have a 3D model(resembling to cylinder but does not have a smooth surface) and want to fit a circle(on x&y axis) INSIDE it at some intervals(z axis). and i want to get the radius of the circle as a result at each interval. Does anyone know a file tht does it?

MikeyP (Aerospace) · Answer 1 · 2010-11-19 03:29:24

Did you bother to search the Matlab file exchange?

http://www.mathworks.com/matlabcentral/fileexchange/24440-incircle-m

M

--
Dr Michael F Platten

mailpulak (Mechanical) · Answer 2 · 2010-11-23 11:18:56

The above is a good program but it does not serve my purpose. Even if there are hundreds of points in the plane and just three points on the inside, it should be able to detect and draw the incircle through those three points(please dont be alarmed, my data is not absolutely random. it is actually a surface of a cylinder like model but uneven).

GregLocock (Automotive) · Answer 3 · 2010-11-23 21:15:00

What you say is true but insufficiently thought through. How do you propose to identify the 3 points that give the smallest circle? Mikey put you on the right track exactly.

Cheers

Greg Locock

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GregLocock (Automotive) · Answer 4 · 2010-11-24 17:42:52

Another piece of code you will need is identifying whether a point is inside a circle.

The gneral form of what you are asking is actually quite difficult to do.

Cheers

Greg Locock

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Fitting circle in a boundary