Programmer Guide/Command Reference/EVAL/pgget - Revision history

Christian at 18:12, 21 April 2011

2011-04-21T18:12:12Z

← Older revision		Revision as of 20:12, 21 April 2011
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	;Usage 2:<code>pgget(<var>X</var>, <var>I</var>, <var>fmt</var>)</code>		;Usage 2:<code>pgget(<var>X</var>, <var>I</var>, <var>fmt</var>)</code>
	:;<var>X</var>:A [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]] defining one or more polygons.		:;<var>X</var>:A [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]] defining one or more polygons.
	:;<var>I</var>:The index of the polygon to be returned; 0 <= <var>I</var> < ''N'' (= <code>pgget(''X'')</code>)		:;<var>I</var>:The index of the polygon to be returned; 0 ≤ <var>I</var> < ''N'' (= <code>pgget(''X'')</code>)
	:;<var>fmt</var>:The format of the result.:		:;<var>fmt</var>:The format of the result.:
	::{\|class="keinrahmen"		::{\|class="keinrahmen"

193.171.195.48 at 10:29, 21 April 2011

2011-04-21T10:29:56Z

← Older revision		Revision as of 12:29, 21 April 2011
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	----		----
	;See also: [[../pginit\|pginit]], [[../pgitest\|pgitest]], [[../pgiline\|pgiline]], [[../pgxgrid\|pgxgrid]], [[../pgsplit\|pgsplit]], [[../pgtrans\|pgtrans]], [[../pghull\|pghull]]		;See also: [[../pginit\|pginit]], [[../pgitest\|pgitest]], [[../pgiline\|pgiline]], [[../pgxgrid\|pgxgrid]], [[../pgsplit\|pgsplit]], [[../pgtrans\|pgtrans]], [[../pghull\|pghull]]


	[[../#Functions\|<function list>]]		[[../#Functions\|<function list>]]

193.171.195.48 at 06:28, 20 April 2011

2011-04-20T06:28:48Z

← Older revision		Revision as of 08:28, 20 April 2011
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	\|}		\|}
	;Result 2: The ''I''-th polygon stored in ''X'' in the format selected by ''fmt''.		;Result 2: The ''I''-th polygon stored in ''X'' in the format selected by ''fmt''.
	~~on. If <var>E</var><=0 the simplification is skipped.~~
	----		----
	;See also: [[../~~pgget~~\|~~pgget~~]], [[../pgitest\|pgitest]], [[../pgiline\|pgiline]], [[../pgxgrid\|pgxgrid]], [[../pgsplit\|pgsplit]], [[../pgtrans\|pgtrans]], [[../pghull\|pghull]]		;See also: [[../pginit\|pginit]], [[../pgitest\|pgitest]], [[../pgiline\|pgiline]], [[../pgxgrid\|pgxgrid]], [[../pgsplit\|pgsplit]], [[../pgtrans\|pgtrans]], [[../pghull\|pghull]]


	[[../#Functions\|<function list>]]		[[../#Functions\|<function list>]]

193.171.195.48 at 06:26, 20 April 2011

2011-04-20T06:26:03Z

← Older revision		Revision as of 08:26, 20 April 2011
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	Extract a polygon from a [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]].		Extract a polygon from a [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]].
	----		----
	;Usage 1:<code>~~pginit~~(<var>X</var>)</code>		;Usage 1:<code>pgget(<var>X</var>)</code>
	:;<var>X</var>:A [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]] defining one or more polygons.		:;<var>X</var>:A [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]] defining one or more polygons.
	;Result 1: The number of [[../#polygons\|simple polygons]] ''N'' stored in ''X''. If the result is '''0''', ''X'' contains no valid polygons.		;Result 1: The number of [[../#polygons\|simple polygons]] ''N'' stored in ''X''. If the result is '''0''', ''X'' contains no valid polygons.
	----		----
	;Usage 2:<code>~~pginit~~(<var>X</var>, <var>I</var>, <var>fmt</var>)</code>		;Usage 2:<code>pgget(<var>X</var>, <var>I</var>, <var>fmt</var>)</code>
	:;<var>X</var>:A [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]] defining one or more polygons.		:;<var>X</var>:A [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]] defining one or more polygons.
	:;<var>I</var>:The index of the polygon to be returned; 0 <= ''I'' < ''N'' (= <code>pgget(''X'')</code>)		:;<var>I</var>:The index of the polygon to be returned; 0 <= <var>I</var> < ''N'' (= <code>pgget(''X'')</code>)
	:;<var>fmt</var>:The format of the result.:		:;<var>fmt</var>:The format of the result.:
	::{\|class="keinrahmen"		::{\|class="keinrahmen"
	\|''fmt''=0 \|\|... return the ''I''-th polygon of ''X'' as [[../#polygons\|polygon-stream]]		\|''fmt''=0 \|\|... return the ''I''-th polygon of ''X'' as [[../#polygons\|polygon-stream]]
			\|-
	\|''fmt''=1 \|\|... return the [[../#polygons\|polygon-stream]] header (a 8x2 matrix) of the ''I''-th polygon of ''X''		\|''fmt''=1 \|\|... return the [[../#polygons\|polygon-stream]] header (a 8x2 matrix) of the ''I''-th polygon of ''X''
	\|}		\|}

193.171.195.48 at 06:25, 20 April 2011

2011-04-20T06:25:07Z

← Older revision		Revision as of 08:25, 20 April 2011
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	Extract a polygon from a [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]].		Extract a polygon from a [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]].
	----		----
	;Usage 1:<code>pginit(<var>X</var>)		;Usage 1:<code>pginit(<var>X</var>)</code>
	:;<var>X</var>:A [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]] defining one or more polygons.		:;<var>X</var>:A [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]] defining one or more polygons.
	;Result 1: The number of [[../#polygons\|simple polygons]] ''N'' stored in ''X''. If the result is '''0''', ''X'' contains no valid polygons.		;Result 1: The number of [[../#polygons\|simple polygons]] ''N'' stored in ''X''. If the result is '''0''', ''X'' contains no valid polygons.
	----		----
	;Usage 2:<code>pginit(<var>X</var>, <var>I</var>, <var>fmt</var>)		;Usage 2:<code>pginit(<var>X</var>, <var>I</var>, <var>fmt</var>)</code>
	:;<var>X</var>:A [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]] defining one or more polygons.		:;<var>X</var>:A [[../#polygons\|closed point-list]] or a [[../#polygons\|polygon-stream]] defining one or more polygons.
	:;<var>I</var>:The index of the polygon to be returned; 0 <= ''I'' < ''N'' (= <code>pgget(''X'')</code>)		:;<var>I</var>:The index of the polygon to be returned; 0 <= ''I'' < ''N'' (= <code>pgget(''X'')</code>)

193.171.195.48 at 06:24, 20 April 2011

2011-04-20T06:24:30Z

@@ Line 1: / Line 1: @@
 {{DISPLAYTITLE:{{SUBPAGENAME}}}}
-=====pgget - count number of polygons=====
+Extract a polygon from a [[../#polygons|closed point-list]] or a [[../#polygons|polygon-stream]].
-<code>N := eval pgGet( {pg_cplist}<var>X</var> )</code>
+[[../#Functions|<function list>]]

Toni: moved Programmer Guide/Command Reference/EVAL/pgget - count number of polygons to Programmer Guide/Command Reference/EVAL/pgget

2011-04-01T10:31:24Z

moved Programmer Guide/Command Reference/EVAL/pgget - count number of polygons to Programmer Guide/Command Reference/EVAL/pgget

← Older revision	Revision as of 12:31, 1 April 2011
(No difference)

Admin: 1 revision: Initial import

2010-11-18T16:31:43Z

1 revision: Initial import

← Older revision	Revision as of 18:31, 18 November 2010
(No difference)

193.171.195.8: initial import

2010-05-17T13:05:27Z

initial import

New page

{{DISPLAYTITLE:{{SUBPAGENAME}}}}
=====pgget - count number of polygons=====

=====Usage:=====

<code>N := eval pgGet( {pg_cplist}<var>X</var> )</code>

<code>N := eval pgGet( {pg_stream}<var>X</var> )</code>

=====Function:=====

Count the number of polygons stored in a polygon-stream or point-list.

=====Parameters:=====

;<var>X</var>

:A polygon-stream or point-list.

=====Result:=====

The number of simple-polygons defined by the pg_cplist X or contained in the pg_stream X.

Note that <code>0</code> is returned if <var>X</var> is invalid.

=====Usage:=====

<code>P := pgGet( {pg_cplist}<var>X</var>, {number}<var>I</var>, {number}<var>FMT</var>=0 )</code>

<code>P := pgGet( {pg_stream}<var>X</var>, {number}<var>I</var>, {number}<var>FMT</var>=0 )</code>

=====Function:=====

Extract the polygon data or header from a polygon-stream or point-list.

=====Parameters:=====

;<var>X</var>

:A point-list or polygon-stream.

;<var>I</var>

:The index of the polygon to extract.

;<var>FMT</var>

:The polygon type to return. The following values are supported:

:0 - return the <var>I</var>-th polygon stored in <var>X</var> as a polygon stream.

:1 - return the <var>I</var>-th polygon stored in <var>X</var> as a simple polygon.

:2 - return the header of the <var>I</var>-th polygon stored in <var>X</var> (8 x 2 matrix, see description of [[Programmer Guide/Command Reference/EVAL/Polygons|pg_stream]])

=====Result:=====

Returns either a simple-polygon, polygon-stream or polygon header, depending on <var>FMT</var>.

=====pghull - compute hull polygon=====

=====Usage:=====

<code><var>H</var> := pgHull( {pg_stream}<var>XS</var>, {number}<var>IX</var>, {pg_stream}<var>YS</var>, {number}<var>IY</var> )</code>

=====Description:=====

Compute the hull-polygon of two simple-polygons.

=====Parameters:=====

;<var>XS</var>

:The first polygon stream.

;<var>IX</var>

:The index of the simple polygon in the polygon stream <var>XS</var>.

;<var>YS</var>

:The second polygon stream.

;<var>IY</var>

:The index of the simple polygon in the polygon stream <var>YS</var>.

=====Result:=====

The polygon stream <var>H</var> containing the hull of the polygons <var>XS</var>[<var>IX</var>] and <var>YS</var>[<var>IY</var>].