force method

@override void force([ double alpha = 1 ])

Implementation

@override
void force([double alpha = 1]) {
  for (int i = 0, n = _nodes.length; i < n; ++i) {
    var node = _nodes[i];
    node.vy += (_yz[i] - node.y) * _strengths[i] * alpha;
  }
}