descend ( pt node -- pt subnode )
Quadtrees

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Vocabulary
quadtrees

Inputs

pt	a sequence
node	a quadtree

Outputs

pt	a sequence
subnode	a quadtree

Word description
Descends into the subnode of quadtree node node that contains pt, leaving pt on the stack.

Definition

USING: kernel ;

IN: quadtrees

: descend ( pt node -- pt subnode )
    [ drop ] [ quadrant ] 2bi ; inline