
300 CHAPTER 9. CIRCULAR DRAWING ALGORITHMS
in the parent biconnected component in the block-cutpoint tree. Likewise, define descendant
nodes to be adjacent to nodes in child biconnec ted components. In order to reduce the
number of crossings caused by inter-biconnected component edges, the technique tries to
place ancestor nodes in the arc between the points α and β. The size of the arc from α to
β is dependent on the distance between the placement of a biconnected component to the
placement of its parent in the radial layout of the block-cutpoint tree. Descendant nodes
are placed uniformly in the bottom half of the biconnected component layout. F