Use more basegfx deg<->rad functions, instead of direct formulas

Also make the functions constexpr.

Due to slight changes in floating-point arithmetics (90.0 instead of
180.0, M_PI2 instead of M_PI resp.), results might differ in last
digits (usually 17th decimal digit). This has lead to need to tweak
char2dump's PieChartTest unit test.

Change-Id: I20323dd7dab27e4deb408ea4181e390cc05e7cd3
Reviewed-on: https://gerrit.libreoffice.org/58583
Tested-by: Jenkins
Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/slideshow/source/engine/shapes/drawinglayeranimation.cxx b/slideshow/source/engine/shapes/drawinglayeranimation.cxx
index 05bd61f61f27..899663dedb16 100644
--- a/slideshow/source/engine/shapes/drawinglayeranimation.cxx
+++ b/slideshow/source/engine/shapes/drawinglayeranimation.cxx
@@ -649,7 +649,7 @@ void ActivityImpl::updateShapeAttributes(
         if( !::basegfx::fTools::equalZero( mfRotationAngle ))
         {
             maShapeAttrLayer.get()->setRotationAngle( mfRotationAngle );
-            double const fRotate = (mfRotationAngle * M_PI / 180.0);
+            double const fRotate = basegfx::deg2rad(mfRotationAngle);
             basegfx::B2DHomMatrix aTransform;
             // position:
             aTransform.rotate( fRotate );