static unsafe PackingNode *ResetNode(PackingNode *node, int x, int y, int w, int h)
{
node->Used = false;
node->Rect = new RectInt(x, y, w, h);
node->Right = null;
node->Down = null;
return(node);
}
static unsafe PackingNode *FindNode(PackingNode *root, int w, int h)
{
if (root->Used)
{
var r = FindNode(root->Right, w, h);
return(r != null ? r : FindNode(root->Down, w, h));
}
else if (w <= root->Rect.Width && h <= root->Rect.Height)
{
return(root);
}
return(null);
}