Property SignedArea
- Namespace
- GeometryHelper.Geometry
- Assembly
- GeometryHelper.dll
SignedArea
Gets the signed area of the polygon, by the shoelace formula: positive when the vertices run counter-clockwise, negative when they run clockwise.
public double SignedArea { get; }Property Value
Remarks
The sum is taken from the first vertex rather than from the origin, so that coordinates far out cost no precision: from the origin, the products of coordinates seven kilometres out are near 5E13, whose last digit is worth a hundredth, and a polygon a tenth of a millimetre across came out with no area at all.