problem with arc angles

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Patry0t
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Joined: Mon Nov 21, 2016 12:52 pm

problem with arc angles

Postby Patry0t » Sun Nov 27, 2016 2:08 pm

Dear all!

I'm using opencv to fit an ellipse on a given set of points. These points are (x,y) points of an arc. I calculate the start-angle and the end-angle and draw an ellipse on it from angle1 to angle2. It works fine in openCV, but when I try to do the same in the dxf, it puts the arc to some different angles, absolutely not there where I wanted it. Can you help me understand how the opencv draws an ellipse and how the dxflib?

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