/// <summary>
/// Determines whether a block at the specified position with the specified
/// connection sides can connect to any other block.
/// </summary>
private bool CanConnect(BlockPosition position, BlockSides rotatedConnectSides)
{
for (int bit = 0; bit < 6; bit++)
{
BlockSides side = rotatedConnectSides & (BlockSides)(1 << bit);
if (side == BlockSides.None ||
!position.GetOffseted(side, out BlockPosition offseted) ||
!_blocks.TryGetValue(offseted, out IPlacedBlock block))
{
continue;
}
int inverseBit = bit % 2 == 0 ? bit + 1 : bit - 1;
if ((block.ConnectSides & (BlockSides)(1 << inverseBit)) != BlockSides.None)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Gets the positions of all parts in the multi blocks relative to the specified origin.
/// Both the positions are and the connection points are rotated.
/// Returns false if any of these positions is out of bounds.
/// </summary>
// ReSharper disable once AnnotateCanBeNullParameter
public bool GetRotatedPositions(BlockPosition origin, byte rotation, out KeyValuePair <BlockPosition, BlockSides>[] output)
{
output = new KeyValuePair <BlockPosition, BlockSides> [_partConnectSides.Count];
Quaternion rotationQuaternion = Rotation.GetQuaternion(rotation);
for (int index = 0; index < _partConnectSides.Count; index++)
{
KeyValuePair <Vector3Int, BlockSides> pair = _partConnectSides[index];
Vector3Int offset = Vector3Int.RoundToInt(rotationQuaternion * pair.Key);
if (!origin.GetOffseted(offset.x, offset.y, offset.z, out BlockPosition position))
{
output = null;
return(false);
}
output[index] = new KeyValuePair <BlockPosition, BlockSides>(position, Rotation.RotateSides(pair.Value, rotation));
}
return(true);
}