public void SetRiverTargetDirection(HexNeighbours toDir)
{
int dir = (int)toDir;
//only accept if target direction is only one value
if (dir != 0 && (dir & (dir - 1)) == 0)
{
RiverTargetDirection = toDir;
}
}
public void SetRiverSourceDirections(HexNeighbours fromDirs)
{
RiverSourceDirections |= fromDirs;
}
