void GetNewPath(PathNode pathNode)
{
//if we're trying to get a new path at a visited node that isn't the last one we visited, we're trying to crossover and should stop.
if (pathNode.IsVisited() && travelPath.Count > 0 && travelPath.Peek() != pathNode)
{
Debug.Log("Flashing!");
puzzle.lineWarning.Flash();
return;
}
//pop the node we're at off the travel stack if it's on it (gets readded later so long as we're not doubling back)
if (travelPath.Count > 0 && travelPath.Peek() == pathNode)
{
travelPath.Pop();
}
//determine best neighbor to path to next based on mouse delta
Vector3 mouseDelta = MouseScreenToWorldPoint() - mousePosLast;
List <PathNode> neighbors = puzzle.GetNeighborsOf(pathNode);
PathNode bestNeighbor = neighbors[0];
float mouseDeltaDotBest = -2f;
foreach (PathNode neighbor in neighbors)
{
float curDotPath = Vector2.Dot(mouseDelta.normalized, (neighbor.transform.position - pathNode.transform.position).normalized);
if (curDotPath > mouseDeltaDotBest)
{
bestNeighbor = neighbor;
mouseDeltaDotBest = curDotPath;
}
}
//set node's visited status
//if best neighbor isn't part of travel path then add this node to travel path and set as traveled
if (!(travelPath.Count > 0 && travelPath.Peek() == bestNeighbor))
{
pathNode.SetVisted(true);
if (travelPath.Count > 0)
{
Edge e = puzzle.GetEdge(pathNode, travelPath.Peek());
e.line.GetComponent <MeshRenderer>().material = puzzle.lineVisitedMat;
}
nearTrail.startAnchor = pathNode.gameObject;
travelPath.Push(pathNode);
}
//if best neighbor is part of travel path then we're backtracking.
else
{
pathNode.SetVisted(false);
if (travelPath.Count > 0)
{
Edge e = puzzle.GetEdge(pathNode, travelPath.Peek());
e.line.GetComponent <MeshRenderer>().material = puzzle.lineUnvisitedMat;
nearTrail.startAnchor = travelPath.Peek().gameObject;
}
else
{
nearTrail.startAnchor = gameObject;
}
}
nearTrail.Refresh();
//set new path anchors
anchorA = pathNode.gameObject.transform;
anchorB = bestNeighbor.gameObject.transform;
if (lerpDist > pathNode.snapRadius / Vector2.Distance(anchorA.position, anchorB.position))
{
lerpDist = 0f;
}
}