## siPortFlags

### Description

This enum specifies the operator port flags. These flags are used to determine the behaviour and characteristics of the port.

### C# Syntax

    siPortFlags.siDefaultPort                                                   // 0
    siPortFlags.siOptionalInputPort                                             // 16
    siPortFlags.siCreatedOutputPort                                             // 256
    siPortFlags.siBranchGroupPort                                               // 1024

Constant | Value | Description
--- | --- | ---
siDefaultPort | 0 | The port is a regular port and must be connected.
siOptionalInputPort | 16 | The port is optional as does not need to be connected.
siCreatedOutputPort | 256 | The object connected to the output port is created when the operator is connected (not implemented for custom operators).
siBranchGroupPort | 1024 | The port can be connected to a group of a hierarchy of objects.

### Applies To

CustomOperator.AddInputPort CustomOperator.AddInputPortByClassID CustomOperator.AddIOPort CustomOperator.AddIOPortByClassID CustomOperator.AddOutputPort CustomOperator.AddOutputPortByClassID Port.Flags CustomOperator::AddInputPort CustomOperator::AddInputPortByClassID CustomOperator::AddIOPort CustomOperator::AddIOPortByClassID CustomOperator::AddOutputPort CustomOperator::AddOutputPortByClassID CustomOperator::AddPortGroup Port::GetFlags PortGroup::AddInputPort PortGroup::AddIOPort PortGroup::AddOutputPort