getBodyArea method
Implementation
double getBodyArea() {
var area = 0.0;
for (var i = 0; i < _bodies.length; ++i) {
final next = (i == _bodies.length - 1) ? 0 : i + 1;
area += _bodies[i].worldCenter.x * _bodies[next].worldCenter.y -
_bodies[next].worldCenter.x * _bodies[i].worldCenter.y;
}
return area *= .5;
}