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Hi,

I don't get what the conditions below exactly means.

Its which u they are talking about? Is the u the parent or children? Does it mean u = B? and the children are A,C,D?

if u is in the quadtree rooted by v:NW then u:x < v:x and u:y ≥ v:y;

Thanks,

I don't get what the conditions below exactly means.

Its which u they are talking about? Is the u the parent or children? Does it mean u = B? and the children are A,C,D?

if u is in the quadtree rooted by v:NW then u:x < v:x and u:y ≥ v:y;

Thanks,