/** split - split the Spine into two new spines, with splitIndex in the first one
* used by the link-drawing code to make one curve into two arrows
*
*/
function split($splitIndex)
{
$spine1 = new WMSpine();
$spine2 = new WMSpine();
$endCursor = $this->pointCount() - 1;
$totalDistance = $this->totalDistance();
for ($i = 0; $i < $splitIndex; $i++) {
$spine1->addRawEntry($this->points[$i]);
}
// work backwards from the end, finishing with the same point
// Recalculate the distance (element 1) from the other end as we go
for ($i = $endCursor; $i > $splitIndex; $i--) {
$newEntry = $this->points[$i];
$newDistance = $totalDistance - $newEntry[1];
// wm_debug(" $totalDistance => $newDistance \n");
$newEntry[1] = $newDistance;
$spine2->addRawEntry($newEntry);
}
return array($spine1, $spine2);
}
