/**
* Updates an IM from the label for an edge.
* Handles edges from both L and A geometrys.
*/
void
Edge::updateIM(const Label& lbl, IntersectionMatrix& im)
{
im.setAtLeastIfValid(lbl.getLocation(0,Position::ON),
lbl.getLocation(1,Position::ON),
1);
if (lbl.isArea()) {
im.setAtLeastIfValid(lbl.getLocation(0,Position::LEFT),
lbl.getLocation(1,Position::LEFT),
2);
im.setAtLeastIfValid(lbl.getLocation(0,Position::RIGHT),
lbl.getLocation(1,Position::RIGHT),
2);
}
}
/**
* Update the IM with the contribution for this component.
* A component only contributes if it has a labelling for both parent geometries
*/
void
RelateNode::computeIM(IntersectionMatrix& im)
{
im.setAtLeastIfValid(label.getLocation(0), label.getLocation(1), 0);
}