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<?php
/**
* @package php-svg-lib
* @link http://github.com/PhenX/php-svg-lib
* @author Fabien Ménager <fabien.menager@gmail.com>
* @license GNU LGPLv3+ http://www.gnu.org/copyleft/lesser.html
*/
namespace Svg\Tag;
class Polyline extends Shape
{
public function start($attributes)
{
$tmp = array();
preg_match_all('/([\-]*[0-9\.]+)/', $attributes['points'], $tmp, PREG_PATTERN_ORDER);
$points = $tmp[0];
$count = count($points);
if ($count < 4) {
// nothing to draw
return;
}
$surface = $this->document->getSurface();
list($x, $y) = $points;
$surface->moveTo($x, $y);
for ($i = 2; $i < $count; $i += 2) {
if ($i + 1 === $count) {
// invalid trailing point
continue;
}
$x = $points[$i];
$y = $points[$i + 1];
$surface->lineTo($x, $y);
}
}
}
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