X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-studio%2Ftrunk%2Fsrc%2Fgtkmm%2Fduck.cpp;h=63bebe7099844e06e48f2c058ca71f00adf43c02;hb=d25b5d47a9d838fad29a2c4d1ffb97447ed53b16;hp=8500b89bdaae6266bf6ec7bd6fb999a4c19330c2;hpb=8ef042c40521681cea99944097c4f90a5ac6cf74;p=synfig.git

diff --git a/synfig-studio/trunk/src/gtkmm/duck.cpp b/synfig-studio/trunk/src/gtkmm/duck.cpp
index 8500b89..63bebe7 100644
--- a/synfig-studio/trunk/src/gtkmm/duck.cpp
+++ b/synfig-studio/trunk/src/gtkmm/duck.cpp
@@ -195,9 +195,11 @@ Duck::set_sub_trans_point(const synfig::Point &x)
 	{
 		Angle old_angle = get_point().angle();
 		set_point((x-get_sub_trans_origin())/get_scalar());
-		Angle new_angle = get_point().angle();
+		Angle change = get_point().angle() - old_angle;
+		while (change < Angle::deg(-180)) change += Angle::deg(360);
+		while (change > Angle::deg(180)) change -= Angle::deg(360);
 		int old_quarters = round_to_int(Angle::deg(rotations).get()/90);
-		rotations += new_angle.dist(old_angle);
+		rotations += change;
 		int new_quarters = round_to_int(Angle::deg(rotations).get()/90);
 		if (old_quarters != new_quarters)
 			synfig::info("rotation: %.2f turns", new_quarters/4.0);