shift
Shifts the starting point of the current ShapeContour by a specified normalized distance dt.
Return
a new ShapeContour with the starting point shifted by the specified distance. If the contour is not closed, the original contour is returned unaltered.
Parameters
the normalized distance by which to shift the starting point. The value is interpreted as a fraction of the total contour length (from 0.0 to 1.0). Positive values shift forward along the contour, while negative values shift backward.
Shifts the contour by a specified amount along its parameterized path. If the contour is not closed, it returns the original contour unaltered.
Return
a new shifted ShapeContour if the contour is closed, or the original contour otherwise.
Parameters
the shift amount, where 1.0 represents the entire length of the contour and positive values move forward while negative values move backward.