/// <summary>
/// Add an additional node, from the current last node along the next TrackNodeVector (given by index)
/// The added node will always be a junction node.
/// </summary>
/// <param name="lastNode">Currently last node of path</param>
/// <param name="nextTvnIndex">TrackNodeVector index along which to place the track</param>
/// <param name="isMainPath">Are we adding a node on the main path (alternative is passing path)</param>
/// <returns>The newly created junction path node</returns>
TrainpathJunctionNode AddAdditionalJunctionNode(TrainpathNode lastNode, int nextTvnIndex, bool isMainPath)
{
// we add a new activeNodeAsJunction
TrainpathJunctionNode newNode = new TrainpathJunctionNode(lastNode);
if (TrackExtensions.TrackNode(nextTvnIndex) == null)
{
return(null); // apparently there is some issue in the track.
}
newNode.JunctionIndex = lastNode.GetNextJunctionIndex(nextTvnIndex);
newNode.SetLocationFromTrackNode();
// simple linking
newNode.PrevNode = lastNode;
if (isMainPath)
{
lastNode.NextMainTvnIndex = nextTvnIndex;
lastNode.NextMainNode = newNode;
}
else
{
lastNode.NextSidingTvnIndex = nextTvnIndex;
lastNode.NextSidingNode = newNode;
}
newNode.SetFacingPoint();
newNode.DetermineOrientation(lastNode, nextTvnIndex);
NetNodesAdded++;
return(newNode);
}
/// <summary>
/// For all the junction nodes, set whether it is a facing point or not
/// </summary>
/// <param name="Nodes">The list of path nodes that now need to be linked</param>
static private void SetFacingPoints(List <TrainpathNode> Nodes)
{
// It is just a convenience to use the list of Nodes.
// In principle this can be done without the list by following the path
for (int i = 0; i < Nodes.Count; i++)
{
TrainpathJunctionNode node = Nodes[i] as TrainpathJunctionNode;
if (node == null)
{
continue;
}
node.SetFacingPoint();
}
}