Method hash

src/IECoreScene/LinkedScene.cpp:1423–1475

}

void LinkedScene::hash( HashType hashType, double time, MurmurHash &h ) const
{
	if ( !m_readOnly )
	{
		throw Exception( "Hashes not available on write-only LinkedScene!" );
	}

	if ( m_linkedScene )
	{
		if ( m_atLink )
		{
			/// special cases: we are exactly at the entry point for the linked scene.
			switch( hashType )
			{
				case TransformHash:
					mainSceneHash( hashType, time, h );
					// Link locations override the transform and bound, so we return without adding the hash from the linked scene.
					return;
				case AttributesHash:
				case HierarchyHash:
				case ChildNamesHash:
					// Attributes, ChildNames and Hierarchy are affected by both the main scene and the linked scene
					mainSceneHash( hashType, time, h );
					break;
				case ObjectHash:
					// Let the object come from the linked location:
					break;
				case BoundHash:
					// if there are extra children at the link, we have to read the bound directly from the main scene,
					// so we hash from there and return (which isn't particularly smart at the moment, so it's going to look
					// like all bounds are different when maybe they aren't). Otherwise we get the bound hash from m_linkedScene
					// so we can recognize repetition.
					NameList childNames;
					m_mainScene->childNames( childNames );
					if( childNames.size() )
					{
						mainSceneHash( hashType, time, h );
						return;
					}
					break;
			};
		}
		if ( m_timeRemapped )
		{
			time = remappedLinkTime( time );
		}
		m_linkedScene->hash(hashType, time, h);
	}
	else
	{
		mainSceneHash(hashType, time, h);
	}
}

/// serialise this into the linked scene cache so it can just be loaded directly without having to traverse the entire scene
IECore::PathMatcher LinkedScene::linkLocations() const