- support edge-ordering on construction, and additional methods:
- sort(), sorted(), unitVec(), collapse()
- null constructor initializes with -1, for consistency with face,
triFace and since it is generally much more useful that way.
- add some methods that allow edges to used somewhat more like hashes.
- count(), found(), insert(), erase()
Here is possible way to use that:
edge someEdge; // initializes with '-1' for both entries
if (someEdge.insert(pt1))
{
// added a new point label
}
... later
// unmark point on edge
someEdge.erase(pt2);
--
STYLE:
- use UList<point> instead of pointField for edge methods for flexibility.
The pointField include is retained, however, since many other routines
may be relying on it being included via edge.H
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