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http://www.openoffice.org/issues/show_bug.cgi?id=111715
------- Additional comments from a...@openoffice.org Tue May 25 16:52:38 +0000
2010 -------
Part (a) starts at SdrCircObj::ImpCalcXPolyCirc where
const double fStart(((36000 - nEnd) % 36000) * F_PI18000);
is used, but numerically better would be
const double fStart((((36000 - nEnd) % 36000) / 18000.0) *
F_PI);
since F_PI18000 is defined in basegfx/ftools.hxx as
#define F_PI18000 (M_PI/18000.0)
which forces the calculation to multiply with an 18000th of PI. This leads to a
slight numerical offset and to choosing the wrong start sector in
basegfx::tools::createPolygonFromEllipseSegment. More numerical corrections
could be done there. It will be necessary to grep for F_PI18000 usages and
numerically correct them.
When changing the lines in SdrCircObj::ImpCalcXPolyCirc as shown above, all
three examples work as expected.
Nonetheless, (a) and (b) should be fixed independently...
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