Returns true only if the path has exactly one contour and that contour is
closed. Paths with multiple contours always return false, even if all
contours are closed.
Returns the position and tangent vector at the given distance along the
path. The distance is clamped to the valid range [0, length]. Returns two
Vec2D values: the position and the normalized tangent vector.
Warps a point onto the path. The x-coordinate of the source point is
interpreted as a distance along the path, and the y-coordinate is used as
an offset along the tangent direction. Returns the warped position as a
Vec2D.
Extracts a sub-section of the path from startDistance to endDistance and
appends it to the destination path. Distances are clamped to the valid
range [0, length]. If startWithMove is true (the default), the extracted
segment begins with a moveTo operation. If false, it continues from the
previous point in the destination path.
