Programmer Guide/Command Reference/EVAL/pginit: Difference between revisions
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::*<var>N</var>>0 and the number of polygons defined by <var>X</var> is not equal to <var>N</var> | ::*<var>N</var>>0 and the number of polygons defined by <var>X</var> is not equal to <var>N</var> | ||
;See also: [[../pgget|pgget]], [[../pgitest|pgitest]], [[../pgiline|pgiline]], [[../pgxgrid|pgxgrid]], [[../pgsplit|pgsplit]], [[../pgtrans|pgtrans]], [[../pghull|pghull]] | ;See also: [[../pgget|pgget]], [[../pgitest|pgitest]], [[../pgiline|pgiline]], [[../pgxgrid|pgxgrid]], [[../pgsplit|pgsplit]], [[../pgtrans|pgtrans]], [[../pghull|pghull]] | ||
[[../#Functions|<function list>]] | [[../#Functions|<function list>]] | ||
Revision as of 11:30, 21 April 2011
Check or initialize a polygon stream.
- Usage
pginit(X {, N=0, {number}E=0} )- X
- A closed point-list or a polygon-stream defining one or more polygons.
- N
- The requested number of simple polygons:
N<=0 undefined, polygons are counted during initialization N>0 exactly N simple polygons must be contained in X
- E
- The maximum error for polygon simplification. If E<=0 the simplification is skipped.
- Result
- A polygon-stream P containing all simple-polygons defined by X. The function failes if:
- no simple polygons can be found or one of the detected polygons is invalid
- N>0 and the number of polygons defined by X is not equal to N
