/// <summary>
/// Returns true if the connection was added successfully.
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public bool Add(NodeInput input)
{
if (!CanConnectInput(input))
{
return(false);
}
// The input cannot be connected to anything.
// This test is not inside the CanConnectInput() because
// an action can remove the old connections automatically to make it
// easier for the user to change connections between nodes.
if (input.HasOutputConnected())
{
// Changes to the inputs need to be properly handled by the Action system,
// so it works with undo.
Debug.LogWarning("Cannot add an input that is already connected");
return(false);
}
input.Connect(this);
_inputs.Add(input);
parentNode.OnNewInputConnection(input);
return(true);
}
private void cacheOldConnections()
{
// Check if the receiving node was already connected.
if (_input != null && _input.HasOutputConnected())
{
_oldConnectedOutput = _input.OutputConnection;
}
// Check if the origin node already had inputs
if (!_output.bCanHaveMultipleConnections && _output.InputCount > 0)
{
_oldConnectedInputs = _output.Inputs.ToList();
}
}