Our pick system implementation.
An AABB tree for IndexedFaceSets.
TODO: get rid of the maxDist parameter, use the from and to vectors as the endpoints of the segment of valid pick-points
viewer, camera scene path and world2ndc double that checks if in ndc coords the third coordinate is not negative by update and accept methods
de.jreality.scene.tool. Access to picking for most users and developers is probably most easily obtained by going through the tool package rather than attempting to use the classes here directly.