Thread Subject: intersection of a line with a closed curve

I have a closed curve in 2-dimensions, defined by C = [x y] (not generated from a function, but from data) and a vector with pt1 (the origin, also the centre of the closed curve) and pt2. How can I find the intersection between the vector and the curve?

Thanks,

Vic

"Vic Band" <vic_air_band@yahoo.com> wrote in message <h5sd2e$q9b$1@fred.mathworks.com>...
> I have a closed curve in 2-dimensions, defined by C = [x y] (not generated from a function, but from data) and a vector with pt1 (the origin, also the centre of the closed curve) and pt2. How can I find the intersection between the vector and the curve?
>
> Thanks,
>
> Vic

Take a look at Fast and Robust Curve Intersections:

http://www.mathworks.com/matlabcentral/fileexchange/11837

from the MATLAB FEX.

(There are lots of other ones there too. Do a search on intersect.)