public void Reflect(LightBeam beam)
{
Room room = this.GetCurrentRoom(beam.CurrentVector);
Vector vector = beam.CurrentVector;
beam.Bend(this.GetUpdatedDirection(room, beam.CurrentVector));
MarkRoomAsVisited(room, vector);
}
public static void PrintResults(Building building, LightBeam beam)
{
Console.WriteLine("Board dimensions: {0} (w) x {1} (h)", building.Width, building.Height);
Console.WriteLine(
"Initial starting position {0},{1}\t{2}",
building.InitialVector.X,
building.InitialVector.Y,
building.InitialVector.Direction == CardinalDirection.North || building.InitialVector.Direction == CardinalDirection.South ? "V" : "H"
);
if (!building.Contains(beam))
{
Vector final = beam.Trail [beam.Trail.Count - 2];
Console.WriteLine(
"Exit position {0},{1}\t{2}",
final.X,
final.Y,
final.Direction == CardinalDirection.North || final.Direction == CardinalDirection.South ? "V" : "H"
);
}
else
{
Console.WriteLine("Beam entered a loop and never exited");
Console.WriteLine("Last position before loop detected:");
Vector final = beam.Trail [beam.Trail.Count - 2];
Console.WriteLine(
"Exit position {0},{1}\t{2}",
final.X,
final.Y,
final.Direction == CardinalDirection.North || final.Direction == CardinalDirection.South ? "V" : "H"
);
}
Console.WriteLine("Beam trail:");
foreach (Vector v in beam.Trail)
{
if (v.X >= 0 && v.Y >= 0 && v.X < building.Width && v.Y < building.Height)
{
Console.WriteLine(string.Format("{0},{1}\t Heading {2}", v.X, v.Y, v.Direction));
}
}
}
public static void Main(string[] args)
{
string path = PromptUserForFile();
Building building;
LightBeam beam;
try {
building = new Building(path);
} catch (Exception) {
Console.WriteLine("Error: unable to create board");
Console.WriteLine("Press any key to continue");
Console.ReadKey();
return;
}
try {
beam = new LightBeam(building.InitialVector);
} catch (Exception) {
Console.WriteLine("Error: unable to create light source");
Console.WriteLine("Press any key to continue");
Console.ReadKey();
return;
}
while (building.Contains(beam) && !building.WasVisited(beam))
{
if (building.HasReflection(beam))
{
building.Reflect(beam);
}
else
{
beam.Traverse();
}
}
PrintResults(building, beam);
Console.WriteLine("Press any key to continue");
Console.ReadKey();
}
public bool HasReflection(LightBeam beam)
{
Room room = GetCurrentRoom(beam.CurrentVector);
return(room != null && room.HasReflection(beam.CurrentVector.Direction));
}
public bool WasVisited(LightBeam beam)
{
Room room = GetCurrentRoom(beam.CurrentVector);
return(room == null ? false : room.WasVisited(beam.CurrentVector.Direction));
}
public bool Contains(LightBeam beam)
{
return(beam.CurrentVector.X >= 0 && beam.CurrentVector.X < this.Width &&
beam.CurrentVector.Y >= 0 && beam.CurrentVector.Y < this.Height);
}
