public List<Triple> getUnshieldedCollidersFromGraph(Graph graph) {
List<Triple> colliders = new ArrayList<>();
List<Node> nodes = graph.getNodes();
for (Node b : nodes) {
List<Node> adjacentNodes = graph.getAdjacentNodes(b);
if (adjacentNodes.size() < 2) {
continue;
}
ChoiceGenerator cg = new ChoiceGenerator(adjacentNodes.size(), 2);
int[] combination;
while ((combination = cg.next()) != null) {
Node a = adjacentNodes.get(combination[0]);
Node c = adjacentNodes.get(combination[1]);
// Skip triples that are shielded.
if (graph.isAdjacentTo(a, c)) {
continue;
}
if (graph.isDefCollider(a, b, c)) {
colliders.add(new Triple(a, b, c));
}
}
}
return colliders;
}
private void printWrongColliderMessage(Node a, Node b, Node c, String location) {
if (truePag != null && graph.isDefCollider(a, b, c) && !truePag.isDefCollider(a, b, c)) {
System.out.println(
location + ": Orienting collider by mistake: " + a + "*->" + b + "<-*" + c);
}
}