The tangent against path direction of the outgoing side of the path
The tangent in path direction of the incoming side of the path
The tangent in path direction of the outgoing side of the path
The tangent against path direction of the incoming side of the path
Used to pick one of the four tangents at a given point on the path.
Note that the directions for
GSK_PATH_FROM_START/GSK_PATH_TO_ENDandGSK_PATH_TO_START/GSK_PATH_FROM_ENDwill coincide for smooth points. Only sharp turns will exhibit four different directions.Since
4.14