Curves
Curves
The curve parametric footprints must be created considering angle as a parameter. The concept is similar to that of the straights, but, in this case, the stretching operation will be angular. For this reason, it is important that the curves are drawn as in the figure: with the input (SNAP_IN1) horizontally of 0 degrees and the outlet (SNAP_OUT1) of 90 degrees. Consequently, the curve must be drawn with a base angle of 90° counterclockwise.
The definition area of the stretch follows the same rules of the straights. In this case, it is not necessary to indicate the direction of the stretch (it is implicit in the sense of rotation of the curve), but you need to define the center of rotation of the stretch. Also in this case, there is a proper mate: SNAP_STRETCH_CTRROT that must be positioned in the center of rotation