以下のような ICENode ポートがあるとします。
nodeOpDef.AddInputPort( ID_Port0, ID_Group0, siICENodePortDataLong, siICENodePortStructureSingle, siICENodeEvaluationContextAny, L"Port_0", L"Port_0" ); nodeOpDef.AddInputPort( ID_Port1, ID_Group0, siICENodeDataVector3, siICENodePortStructureSingle, siICENodeEvaluationContextAny, L"Port_1", L"Port_1" ); nodeOpDef.AddInputPort( ID_Port2, ID_Group0, siICENodePortDataFloat, siICENodePortStructureArray, siICENodeEvaluationContextAny, L"Port_2", L"Port_2" ); nodeOpDef.AddOutputPort( ID_OutPort0, siICENodeDataVector3, siICENodePortStructureSingle, siICENodeEvaluationContextAny, L"OutPort_0", L"OutPort_0" ); nodeOpDef.AddOutputPort( ID_OutPort1, siICENodePortDataFloat, siICENodePortStructureArray, siICENodeEvaluationContextAny, L"OutPort_1", L"OutPort_1" ); nodeOpDef.AddOutputPort( ID_OutPort2, siICENodePortDataLong, siICENodePortStructureSingle, siICENodeEvaluationContextAny, L"OutPort_2", L"OutPort_2" );
次のブロックでは、上で定義したポートデータを繰り返し適用する方法と、エレメントのフィルタリング方法を示しています。
XSIPLUGINCALLBACK CStatus SampleNode_Evaluate( ICENodeContext& in_ctxt ) { // Switch over the output port being evaluated ULONG outportID = in_ctxt.GetEvaluatedOutputPortID( ); // Create the index set CIndexSet indexSet( in_ctxt ); switch ( outportID ) { // This section demonstrates a regular array iteration case ID_OutPort0: { // Get the data from port 0 and port 1 CDataArrayLong port0( in_ctxt, ID_Port0 ); CDataArrayVector3f port1( in_ctxt, ID_Port1 ); // Get the output array CDataArrayVector3 outPort0( in_ctxt ); // Now fill the output array for( CIndexSet::Iterator it = indexSet.Begin(); it.HasNext(); it.Next()) { ULONG nIndex = it; XSI::MATH::CVector3f v3f( port1[ nIndex ] ); outPort0[ nIndex ].Set( v3f.GetY(), port0[ nIndex ] * v3f.GetZ(), v3f.GetX() ); } } break; // This section demonstrates how to iterate over a 2D array case ID_OutPort1: { // Get the 2D array from port 2 CDataArray2DFloat port2( in_ctxt, ID_Port2 ); // Get the output 2D array CDataArray2DFloat outPort1( in_ctxt ); // The first loop iterates normally on outPort1 for( CIndexSet::Iterator it = indexSet.Begin(); it.HasNext(); it.Next()) { // Now we use the Accessor class to allocate the output buffer and to iterate over the sub-array of outPort1 CDataArray2DFloat::Accessor floatAccessor = port2[it]; CDataArray2DFloat::Accessor outAccessor = outPort1.Resize( it, floatAccessor.GetCount( ) ); for (ULONG i=0; i<floatAccessor.GetCount( ); i++) { // Set the output 2D array outAccessor[i] = floatAccessor[i]; } } } break; // This section demonstrates how to filter out element items case ID_OutPort2: { // Get the data from port 0 CDataArrayLong port0( in_ctxt, ID_Port0 ); // Get the output array CDataArrayLong outPort2( in_ctxt ); for( CIndexSet::Iterator it = indexSet.Begin(); it.HasNext(); /* do not call it.Next() here as it could increment the iterator twice! */ ) { outPort2[ it ] = port0[ it ]; if ( port0[ it ] < 10 ) { // Filter out elements of port 0 below 10 it.Remove( ); // Important: Remove() will increment the iterator position by itself } else { // Nothing to filter out, go to next item it.Next( ); } } } break; }; return CStatus::OK; }