Generic Strips
Generic Strip is a collection of geometrical objects, which has the same internal
relationships as 2D Segment Strips. Example of
non-line strip is a patch strip of a
3DS object, where patches have role identical
to lines and edges act identically to points. This type of strip can be
closed, which is demonstrated in
Fig3 of the 3DS
surfaces topic
Strips consist of two arrays of items: array of
elements (act as segments in 2D Segment
Strips) and array of connectors, which
act as points in 2D Segment Strips.
Each element has either two references to its first and the second
connectors (act as ends) or no ends at all. In the latter case the
element is called closed element. Example: 2D strip, which consists
of a single circle. If the i-th element in the array of
elements has ends its first end is the i-th element in the
array of connectors.
Strip which has no items of any kind is called empty.
A strip can have a single connector and no elements like a 2D strip which
is a single point. This kind of strip is called Singleton
The first end of the first element is called the first end of the
strip. The second end or the last element is called last end of the
strip
A strip is called closed if its first end
coincides with the last end or it has no ends but has a single closed
element. Empty strips are not closed.
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