Programmer Guide/Command Reference/EVAL/pgsplit: Difference between revisions
From STX Wiki
< Programmer Guide | Command Reference | EVAL
Jump to navigationJump to search
No edit summary |
No edit summary |
||
| Line 4: | Line 4: | ||
:<code>pgsplit(<var>X</var>, <var>IX</var>, <var>PX1<sub>scalar</sub></var>, <var>PY1<sub>scalar</sub></var>), <var>PX2<sub>scalar</sub></var>, <var>PY2<sub>scalar</sub></var>)</code> | :<code>pgsplit(<var>X</var>, <var>IX</var>, <var>PX1<sub>scalar</sub></var>, <var>PY1<sub>scalar</sub></var>), <var>PX2<sub>scalar</sub></var>, <var>PY2<sub>scalar</sub></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>IX</var>:The index of the polygon of ''X'' to be splitted; 0 | :;<var>IX</var>:The index of the polygon of ''X'' to be splitted; 0 ≤ <var>IX</var> < <code>[[../pgget|pgget]](''X'')</code> | ||
:;<var>PX1, PY1, PX2, PY2</var>: The points <''PX1'',''PY1''> and <''PX2'',''PY2''> defining the line to split the polygon. There must be exactly two intersections of the line with the polygon! | :;<var>PX1, PY1, PX2, PY2</var>: The points <''PX1'',''PY1''> and <''PX2'',''PY2''> defining the line to split the polygon. There must be exactly two intersections of the line with the polygon! | ||
;Result: The result ''r'' is a [[../#polygons|polygon-stream]] containing the two split parts of the polygon. | ;Result: The result ''r'' is a [[../#polygons|polygon-stream]] containing the two split parts of the polygon. | ||
Latest revision as of 19:29, 21 April 2011
Use a line to split a polygon into two parts.
- Usage
pgsplit(X, IX, PX1scalar, PY1scalar), PX2scalar, PY2scalar)- X
- a closed point-list or a polygon-stream defining one or more polygons.
- IX
- The index of the polygon of X to be splitted; 0 ≤ IX <
pgget(X) - PX1, PY1, PX2, PY2
- The points <PX1,PY1> and <PX2,PY2> defining the line to split the polygon. There must be exactly two intersections of the line with the polygon!
