Method computeIndices

src/IECoreScene/MeshAlgoSplit.cpp:603–639

private:

	void computeIndices()
	{
		// Once indices have been added, and before using them, this function is called to
		// compute the new indices.
		if( m_indicesComputed )
		{
			return;
		}

		m_indicesComputed = true;

		for( unsigned int blockId = 0; blockId < m_fromOldIds.size(); blockId++ )
		{
			auto &block = m_fromOldIds[ blockId ];
			if( !block )
			{
				continue;
			}

			for( int i = 0; i < m_blockSize; i++ )
			{
				if( (*block)[i] != -1 )
				{
					(*block)[i] = m_numIdsUsed;
					m_numIdsUsed++;
				}
			}
		}

		for( int &id : m_newIndices )
		{
			int blockId = id / m_blockSize;
			int subIndex = id % m_blockSize;

			id = (*m_fromOldIds[ blockId ])[subIndex];
		}
	}

	// IntVectorData to hold the new indices
	IntVectorDataPtr m_newIndicesData;