private bool IsValid(Room room, int comingFrom)
{
// Checking every direction
for (int direction = 0; direction < 4; direction++)
{
if (comingFrom == direction)
{
if (!room.HasDoorwayTo(direction))
{
return(false);
}
}
else
{
if (room.HasDoorwayTo(direction))
{
// Room has doorway to here
if (!DirectionIsLegal(room, direction))
{
// ... but we're out of bounds
return(false);
}
if (GetRoomInDirection(room, direction) != null)
{
// ... but the path is already taken
// If the blocking door also has a nicely fitting doorway (to the opposite direction so they meet), this is a match
if (!GetRoomInDirection(room, direction).HasDoorwayTo((direction + 2) % 4))
{
return(false);
}
}
}
else
{
// Room does not have a doorway to specific direction: Now we have to check that the neighbouring room is not trying to access this room
if (GetRoomInDirection(room, direction) != null)
{
// There is a room here
// If the other room has a doorway to where we're generating, this is not a match
if (GetRoomInDirection(room, direction).HasDoorwayTo((direction + 2) % 4))
{
return(false);
}
}
}
}
}
// Wow, we got this far. In that case the room is valid.
return(true);
}
private void ContinueFrom(Room room)
{
int x = room.X;
int z = room.Z;
int direction = _random.Next(0, 4);
for (int i = 0; i < 4; i++)
{
if (room.HasDoorwayTo(direction % 4) && GetRoomInDirection(room, direction % 4) == null)
{
// Generating a room
switch (direction % 4)
{
case South:
Generate(x, z - 1, North);
break;
case West:
Generate(x - 1, z, East);
break;
case North:
Generate(x, z + 1, South);
break;
case East:
Generate(x + 1, z, West);
break;
}
}
direction++;
}
}
