code: void getAffectedEdges(int cluster, AttributeStreamOfInt32 edges) {
  		int first_edge = getClusterFirstEdge(cluster);
  		if (first_edge == -1)
  			return;
  
  		int edge = first_edge;
  		do {
  			int sweepNode = getEdgeSweepNode(edge);
  			if (StridedIndexTypeCollection.isValidElement(sweepNode)) {
  				edges.add(edge);
  			}
  			edge = getNextEdge(edge, cluster);
  		} while (edge != first_edge);
  	}
docs: change of cluster coordinate.