public void CopyOccupantsFrom(Level other)
{
// Make sure the levels are assessed.
AssessLevel();
other.AssessLevel();
// Quick check that the levels are compatible with this operation.
if (boxes != other.boxes || sokobans > 1 || other.sokobans > 1 || insideSquares != other.insideSquares)
{
throw new InvalidOperationException("incompatible level");
}
// Remove the old sokoban.
if (sokobans == 1)
{
RemoveSokoban();
}
// Move the boxes.
MoveBoxes(other.boxCoordinates);
// Add the new sokoban.
if (other.sokobans == 1)
{
AddSokoban(other.SokobanCoordinate);
}
if (markAccessible)
{
AddAccessible();
}
#if DEBUG
if (validate)
{
if (!Equals(other))
{
throw new Exception("copy occupants failed");
}
}
#endif
}
