Path | Simplify does not work on elliptical arc with non-zero rotation

[Alvin Penner]

attached is a test file for testing the Path | Simplify operation

[Alvin Penner (apenner)]

    When I apply Edit | Select All and then Path | Simplfy, I get the attached result.
    The object that is not properly simplified is an elliptical arc that is unique in that it has a non-zero 'x-axis-rotation'.
    This is very similar to Bug 250236, which was successfully fixed in October.

[Alvin Penner (apenner)]

    Okay, ignore the reference to Bug 250326. The reason that the elliptical arc with non-zero rotation is causing a problem is because it is not a valid sodipodi object. You cannot create one of these using the Inkscape gui, you have to import it from an external file. If you try to create one in the gui you will get a sodipodi:type = arc for which the rotation angle by definition is zero and cannot be changed. If you rotate this object what happens is you get a rotate transform matrix but the rotation angle is still zero in the sodipodi object. So the arc with non-zero angle is not a legal (or recognized) sodipodi object, and the Simplify operation does not work.
    However, the simplify operation should still work even if the gui doesn't.
    There is also a very unfortunate side effect, which is that the operation : Path | Object to Path doesn't work either on this type of object, which is how I got onto this subject in the first place.

[jazzynico (jazzynico)]

Confirmed on Windows XP, Inkscape trunk revision 11649.

Workaround:
Modifying a node Inkscape converts the elliptical arc to a Bezier curve that can then be simplified correctly.

[Alvin Penner (apenner)]

fix committed to rev 12756