area_polygon 1.0.1
area_polygon: ^1.0.1 copied to clipboard
Calculate the area of a simple 2D polygon given its vertices. A Dart port of the area-polygon npm package.
Calculate the area of a simple 2D polygon given its vertices.
This is a port of the math-utils/area-polygon library written in JavaScript.
Usage #
List<Offset> points = [
// your points here, e.g. a 4x4 square:
Offset(0, 0),
Offset(0, 4),
Offset(4, 4),
Offset(4, 0),
];
double area = calculateArea(points); // 16
print('Area: $area');
The points
must also trace the edge of the polygon.
The last point is assumed to be connected to the first point.
If signed
is true, this will return the signed area.
This is helpful to determine the orientation of points
.
Signed area is positive if the points
are counter-clockwise,
or negative if the points
are clockwise.