Initial support for duck drags of more than 180 degrees.

[synfig.git] / synfig-studio / trunk / src / gtkmm / duck.cpp

diff --git a/synfig-studio/trunk/src/gtkmm/duck.cpp b/synfig-studio/trunk/src/gtkmm/duck.cpp
index b345be5..ec67e16 100644 (file)
--- a/synfig-studio/trunk/src/gtkmm/duck.cpp
+++ b/synfig-studio/trunk/src/gtkmm/duck.cpp
@@ -30,6 +30,7 @@
 #endif
 
 #include "duck.h"
+#include <ETL/misc>
 
 #endif
 
@@ -64,6 +65,7 @@ int _DuckCounter::counter(0);
 /* === M E T H O D S ======================================================= */
 
 Duck::Duck():
+       rotations(synfig::Angle::deg(0)),
        origin(0,0),
        scalar(1),
        editable(false),
@@ -74,6 +76,7 @@ Duck::Duck():
 Duck::Duck(const synfig::Point &point):
        type_(TYPE_NONE),
        point(point),
+       rotations(synfig::Angle::deg(0)),
        origin(0,0),
        scalar(1),
        guid_(0),
@@ -84,6 +87,7 @@ Duck::Duck(const synfig::Point &point):
 
 Duck::Duck(const synfig::Point &point,const synfig::Point &origin):
        point(point),
+       rotations(synfig::Angle::deg(0)),
        origin(origin),
        scalar(1),
        guid_(0),
@@ -184,7 +188,20 @@ Duck::get_sub_trans_point()const
 void
 Duck::set_sub_trans_point(const synfig::Point &x)
 {
-       set_point((x-get_sub_trans_origin())/get_scalar());
+       if (get_type() == Duck::TYPE_TANGENT ||
+               get_type() == Duck::TYPE_ANGLE)
+       {
+               Angle old_angle = get_point().angle();
+               set_point((x-get_sub_trans_origin())/get_scalar());
+               Angle new_angle = get_point().angle();
+               int old_quarters = round_to_int(Angle::deg(rotations).get()/90);
+               rotations += new_angle.dist(old_angle);
+               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);
+       }
+       else
+               set_point((x-get_sub_trans_origin())/get_scalar());
 }
 
 synfig::Point