signedArea
Given a ring of curves, the sum of area() will be the area enclosed by that ring. For clockwise rings, the sum will be negative, for counter-clockwise rings it will be positive.
Return
the signed area of the curve
Given a ring of curves, the sum of area() will be the area enclosed by that ring. For clockwise rings, the sum will be negative, for counter-clockwise rings it will be positive.
the signed area of the curve