private void HandleBranchMerge(BranchMergeAction branchMergeAction)
{
IBranch extendedBranch = branchMergeAction.ExtendedBranch;
IBranch removedBranch = branchMergeAction.RemovedBranch;
var locationsOnExtendedBranch =
Locations.Values.Where(l => l.Branch == extendedBranch).ToList();
var locationsOnRemovedBranch =
Locations.Values.Where(l => l.Branch == removedBranch).ToList();
//remove the locations of the branches
foreach (var networkLocation in locationsOnRemovedBranch.Concat(locationsOnExtendedBranch))
{
Locations.Values.Remove(networkLocation);
}
//reinitialize
segmentsInitialized = false;
initialized = false;
StoreBranchLengths();
}
/// <summary>
/// Merge 2 branches by removing the node that connects them.
/// </summary>
/// <param name="node"></param>
/// <param name="network"></param>
public static void MergeNodeBranches(INode node, INetwork network)
{
// The first branch will be the incoming branch
IBranch targetBranch = node.IncomingBranches[0];
IBranch sourceBranch = node.OutgoingBranches[0];
var canRemoveNodeAndMergeBranches = (node.OutgoingBranches.Count == 1) && (node.IncomingBranches.Count == 1);
if (!canRemoveNodeAndMergeBranches)
{
throw new ArgumentException("Can only merge node with exactly 1 incoming and 1 outgoing branch and belonging to the same reach.");
}
if (targetBranch.IsLengthCustom != sourceBranch.IsLengthCustom)
{
throw new ArgumentException(string.Format("Cannot merge branch '{0}' and '{1}'. One has a custom length and the other does not.", targetBranch.Name, sourceBranch.Name));
}
var branchMergeAction = new BranchMergeAction
{
RemovedBranch = sourceBranch,
RemovedNode = node,
ExtendedBranch = targetBranch
};
//update the action and end the action so 'listeners' can react
network.BeginEdit(branchMergeAction);
//the action might have been cancelled
if (network.EditWasCancelled)
{
network.CancelEdit(); //not one of my prettier hacks, sorry
return;
}
var vertices = new List <ICoordinate>();
for (int i = 0; i < targetBranch.Geometry.Coordinates.Length; i++)
{
vertices.Add(new Coordinate(targetBranch.Geometry.Coordinates[i].X,
targetBranch.Geometry.Coordinates[i].Y));
}
for (int i = 1; i < sourceBranch.Geometry.Coordinates.Length; i++)
{
vertices.Add(new Coordinate(sourceBranch.Geometry.Coordinates[i].X,
sourceBranch.Geometry.Coordinates[i].Y));
}
var chainage = targetBranch.Geometry.Length;
targetBranch.Geometry = new LineString(vertices.ToArray()); // endGeometry;
if (targetBranch.IsLengthCustom)
{
// Use TypeUtils to circumvent chainage correction for BranchFeatures on targetBranch.
TypeUtils.SetField(targetBranch, "length", targetBranch.Length + sourceBranch.Length);
}
MergeBranchFeatures(sourceBranch, targetBranch, chainage);
// before removing the source branch reconnect the end of the target branch to the end node of the source branch
targetBranch.Target = sourceBranch.Target;
network.Branches.Remove(sourceBranch);
network.Nodes.Remove(node);
network.EndEdit();
}
