private void CollapseCircles(int node)
{
var children = sg.Children[node];
if (children.Count == 0)
{
radii[node] = LeafRadius;
return;
}
foreach (var child in children)
{
placed[child] = false;
}
var orderedChildren = children.OrderBy(x => positions[x].LengthSquared()).ToArray();
placed[orderedChildren.First()] = true;
foreach (var child in orderedChildren.Skip(1))
{
ApplySpringsForNodeChildren(node, true);
placed[child] = true;
}
var childCircles = children.Select(x => new Circle2(positions[x], radii[x])).ToArray();
var boundingCircle = Circle2.BoundingCircle(childCircles);
foreach (var child in children)
{
positions[child] -= boundingCircle.Center;
}
radii[node] = boundingCircle.Radius;
}