values not intersecting

[nxgraphics]

Hi !
i had a question concerning the intersections,
if the clipper is the same size as the source polygon, why doesnt it return the on-line intersection ?
var src = [[0,0], [100,0], [100,100], [0,100]];
var clipper = [[0,0] , [100,0] , [100,100], [0,100]];
it returns null, could you comfirm the behaviour ? thx

[w8r]

I confirm that, the only thing that can be done here is a trivial string equality check. Greiner-Hormann algorithm is not good at overlapping edges, it's a degenerate case. You can also try https://github.com/w8r/martinez algorithm

Kind regards,
Alexander Milevski

On 06 Sep 2016, at 19:05, Stephane Kyles [email protected] wrote:

Hi !
i had a question concerning the intersections,
if the clipper is the same size as the source polygon, why doesnt it return the on-line intersection ?
var src = [[0,0], [100,0], [100,100], [0,100]];
var clipper = [[0,0] , [100,0] , [100,100], [0,100]];
it returns null, could you comfirm the behaviour ? thx

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