Fixed ellipse radial angle error | Added DxfHatch

[APOSWE]

• Fixed ellipse radial angle error. Now the ellipse is approximated with a defined resolution of 10 degrees.
  
• Added DxfHatch

[brettfo]

I'm not sure I understand why an ellipse is better represented as a series of line segments instead of an actual arc segment. If you need line segments in your case, that might be better handled by a post-processing step with a proper SVG editor, and that would allow you to do the same with circles as well, and not just ellipses.

Is there a specific bug with ellipse rendering that needs to be fixed? I'd rather have a targeted fix for a specific issue, rather than a wholesale replacement of the ellipse rendering code.

[APOSWE]

No, it's actually not better because the SVG is larger overall. But like you said, I had situations where I failed. And after trying for 5 hours I decided to take a different approach!

If you have an x-rotation on the arc and the main axis of the ellipse is not parallel to the coordinate system, then the arc is not correct.