Comments on: Visualizing the floating-point behavior of the point-on-line test http://blogs.mathworks.com/steve/2012/08/22/visualizing-the-floating-point-behavior-of-the-point-on-line-test/ Steve Eddins manages the Image & Geospatial development team at The MathWorks and coauthored Digital Image Processing Using MATLAB. He writes here about image processing concepts, algorithm implementations, and MATLAB. Wed, 19 Jun 2013 17:38:32 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: Amro http://blogs.mathworks.com/steve/2012/08/22/visualizing-the-floating-point-behavior-of-the-point-on-line-test/#comment-24897 Amro Fri, 24 Aug 2012 10:57:17 +0000 http://blogs.mathworks.com/steve/?p=652#comment-24897 You get slightly different results with the determinant function:

function out = floatOrient(p,q,r)
out = sign( det([q-p;r-p]) );
end

I had something similar in my solution as well:

http://www.mathworks.com/matlabcentral/cody/problems/820-eliminate-unnecessary-polygon-vertices/solutions/110953

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