The vtol_two_chain class is used to represent a set of faces on a topological structure. A vtol_two_chain consists of its inferior faces and the superiors on which it lies. A vtol_two_chain may or may not be an ordered cycle. If the chain of faces encloses a volume, then the vtol_two_chain may be used as the boundary of a topological vtol_block in a 3D structure.
Modifications: JLM December 1995, Added timeStamp (Touch) to operations which affect bounds. JLM December 1995, no local method for ComputeBoundingBox Should use vtol_face geometry recursively to be proper. Currently reverts to bounds on vertices from vtol_topology_object::ComputeBoundingBox() 05/13/98 RIH replaced append by insert_after to avoid n^2 behavior PTU May 2000 ported to vxl Dec. 2002, Peter Vanroose -interface change: vtol objects -> smart pointers
Definition in file vtol_two_chain.h.
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