/**
* Calculate a track's position based on another track and make sure they are well connected.
*
* @param originalTrack The track the new track will be placed around.
* @param newTrack The new track that will be placed.
* @param port The port at which the new track will be placed (e.g. out, out2, ...).
* @param positions Dictionary that contains the positions of already placed tracks.
* @return The position of the new track.
*/
Vector2 adjustPosition(Railway.Track originalTrack, Railway.Track newTrack, string port, Dictionary <int, Vector2> positions)
{
Vector2 newPosition = positions[originalTrack.id];
// Position relative to other track
if (port == "out")
{
newPosition.y += 80;
}
else if (port == "in")
{
newPosition.y -= 80;
}
else if (port == "out2")
{
if (newTrack.type == "Junction")
{
newPosition += new Vector2(-30, 80);
}
else
{
newPosition += new Vector2(30, 80);
}
}
else if (port == "in2")
{
if (newTrack.type == "Junction")
{
newPosition += new Vector2(-30, -80);
}
else
{
newPosition += new Vector2(-30, -80);
}
}
// Crossing is twice its size
if (originalTrack.type == "Crossing")
{
if (port == "out")
{
newPosition += new Vector2(30, 80);
}
else if (port == "out2")
{
if (newTrack.type == "Junction")
{
newPosition += new Vector2(-30, 80);
}
else
{
newPosition += new Vector2(30, 80);
}
}
}
return(newPosition);
}
public void loadWorld(string railwayfile)
{
// Ground
railwayFactory.createGround(10000, 10000);
// Load railway xml file
TextAsset textAsset = (TextAsset)Resources.Load(railwayfile);
XmlDocument xmldoc = new XmlDocument();
xmldoc.LoadXml(textAsset.text);
// Populate railway
populateRailway(xmldoc, railway);
// Place tracks in BFS order, starting from a start station
Dictionary <int, bool> visited = new Dictionary <int, bool>();
Dictionary <int, Vector2> positions = new Dictionary <int, Vector2>();
Railway.Track startStation = railway.getStartStation();
Vector2 position = new Vector2(0, 0);
createTrack(startStation, position);
positions[startStation.id] = position;
Queue <Railway.Track> queue = new Queue <Railway.Track>();
queue.Enqueue(startStation);
while (queue.Count != 0)
{
Railway.Track track = queue.Dequeue();
foreach (KeyValuePair <string, int> port in track.ports)
{
Railway.Track newTrack = railway.tracks[port.Value];
if (!visited.ContainsKey(newTrack.id) || !visited[newTrack.id])
{
Vector2 newPosition = adjustPosition(track, newTrack, port.Key, positions);
positions[newTrack.id] = newPosition;
createTrack(newTrack, newPosition);
queue.Enqueue(newTrack);
}
}
visited[track.id] = true;
}
}
/**
* Fill the railway object, i.e. create all the Track objects.
*
* @param xmldoc The xml file that contains the railway network.
* @param railway The (empty) railway object that needs to be populated.
*/
void populateRailway(XmlDocument xmldoc, Railway railway)
{
foreach (XmlNode track in xmldoc.GetElementsByTagName("Railway")[0].ChildNodes)
{
Railway.Track newTrack = new Railway.Track();
int id = -1;
newTrack.type = track.Name;
foreach (XmlNode data in track.ChildNodes)
{
if (data.Name == "id")
{
id = int.Parse(data.InnerText);
newTrack.id = id;
}
else if (data.Name == "length")
{
newTrack.length = int.Parse(data.InnerText);
}
else if (data.Name == "name")
{
newTrack.name = data.InnerText;
}
else if (data.Name == "isStartStation")
{
if (data.InnerText == "true")
{
newTrack.isStartStation = true;
}
}
else if (data.Name == "schedule")
{
newTrack.schedule = data.InnerText;
}
else if (data.Name == "ports")
{
foreach (XmlNode port in data.ChildNodes)
{
newTrack.ports[port.Name] = int.Parse(port.InnerText);
}
}
}
railway.tracks.Add(id, newTrack);
}
}
/**
* Create a track on a specific position.
*
* @param track The new track that will be placed.
* @param position The position of the track.
*/
void createTrack(Railway.Track track, Vector2 position)
{
if (track.type == "Junction")
{
railwayFactory.createJunction(track.id.ToString(), track.length, Mathf.RoundToInt(position.x), Mathf.RoundToInt(position.y));
}
else if (track.type == "Turnout")
{
railwayFactory.createTurnout(track.id.ToString(), track.length, Mathf.RoundToInt(position.x), Mathf.RoundToInt(position.y));
}
else if (track.type == "Straight")
{
railwayFactory.createStraight(track.id.ToString(), track.length, Mathf.RoundToInt(position.x), Mathf.RoundToInt(position.y));
}
else if (track.type == "Station")
{
railwayFactory.createStation(track.id.ToString(), track.isStartStation, track.schedule, Mathf.RoundToInt(position.x), Mathf.RoundToInt(position.y), track.name);
}
else if (track.type == "Crossing")
{
railwayFactory.createCrossing(track.id.ToString(), track.length, Mathf.RoundToInt(position.x), Mathf.RoundToInt(position.y));
}
}
