Topmost-node-at-world-point dep, consumed by moveAction for
reparent-on-drop and available to any action that needs a single-best
pick. Mirrors the same hit-test plumbing <SceneCanvas> feeds to the
tool dispatcher; consumers with custom hit-testing override here.
exclude is iterated once per call and treated as a set membership
test — the dep walks hits front-to-back and returns the first id not
in the exclude set. Pass moving-node roots + their descendants when
the caller wants to ignore the nodes it's manipulating.
Topmost-node-at-world-point dep, consumed by
moveActionfor reparent-on-drop and available to any action that needs a single-best pick. Mirrors the same hit-test plumbing<SceneCanvas>feeds to the tool dispatcher; consumers with custom hit-testing override here.excludeis iterated once per call and treated as a set membership test — the dep walks hits front-to-back and returns the first id not in the exclude set. Pass moving-node roots + their descendants when the caller wants to ignore the nodes it's manipulating.