pgget

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Extract a polygon from a closed point-list or a polygon-stream.


Usage 1
pginit(X)
X
A closed point-list or a polygon-stream defining one or more polygons.
Result 1
The number of simple polygons N stored in X. If the result is 0, X contains no valid polygons.

Usage 2
pginit(X, I, fmt)
X
A closed point-list or a polygon-stream defining one or more polygons.
I
The index of the polygon to be returned; 0 <= I < N (= pgget(X))
fmt
The format of the result.:
fmt=0 ... return the I-th polygon of X as polygon-stream fmt=1 ... return the polygon-stream header (a 8x2 matrix) of the I-th polygon of X
Result 2
The I-th polygon stored in X in the format selected by fmt.

on. If E<=0 the simplification is skipped.


See also
pgget, pgitest, pgiline, pgxgrid, pgsplit, pgtrans, pghull


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