public bool MoveNext()
{
repeat:
if (start)
{
start = false;
return(true);
}
var t = stack.Peek();
if (t.i > 3)
{
if (stack.Count > 1)
{
stack.Pop();
goto repeat;
}
else
{
return(false);
}
}
else
{
if (t.child.isLeaf)
{
if (stack.Count > 1)
{
stack.Pop();
goto repeat;
}
else
{
return(false);
}
}
else
{
var size = t.size / 2;
var posIndex = Quadtree.IndexToSigns(t.i);
var origin = t.origin + (new Vector2(posIndex.x * size, posIndex.y * size));
stack.Push(new Tracker(t.child.children[t.i], origin, size));
t.i++;
return(true);
}
}
}
public bool MoveDown(int childIndex)
{
var t = stack.Peek();
if (t.child.isLeaf)
{
return(false);
}
else
{
var size = t.size / 2;
var posIndex = Quadtree.IndexToSigns(t.i);
var origin = t.origin + (new Vector2(posIndex.x * size, posIndex.y * size));
stack.Push(new Tracker(t.child.children[childIndex], origin, size));
return(true);
}
}