Returns a single slice of pie
| protected GetSlice ( $angle_start, $angle_end, &$attr ) |
/**
* Returns a single slice of pie
*/
protected function GetSlice($item, $angle_start, $angle_end, $radius_x, $radius_y, &$attr, $single_slice)
{
if ($single_slice) {
return parent::GetSlice($item, $angle_start, $angle_end, $radius_x, $radius_y, $attr, $single_slice);
}
$x_start = $y_start = $x_end = $y_end = 0;
$angle_start += $this->s_angle;
$angle_end += $this->s_angle;
$this->CalcSlice($angle_start, $angle_end, $radius_x, $radius_y, $x_start, $y_start, $x_end, $y_end);
$outer = $angle_end - $angle_start > M_PI ? 1 : 0;
$sweep = $this->reverse ? 0 : 1;
// find explosiveness
list($xo, $yo) = $this->GetExplode($item, $angle_start, $angle_end);
$xc = $this->x_centre + $xo;
$yc = $this->y_centre + $yo;
$x_start += $xo;
$x_end += $xo;
$y_start += $yo;
$y_end += $yo;
$attr['d'] = "M{$xc},{$yc} L{$x_start},{$y_start} " . "A{$radius_x} {$radius_y} 0 {$outer},{$sweep} {$x_end},{$y_end} z";
return $this->Element('path', $attr);
}