
180 CHAPTER 5. TREE DRAWING ALGORITHMS
Figure 5.19 Layout of the ringed circular layout algorithm of [TM02]. The four larger
rings represent the largest children of the parent node, and the inner ring represents the
area left for the rest of the children.
Figure 5.20 Rotation strategy to decrease occlusion. Figure taken from [TM02].
In order to allow for real-time interaction, a top-down variation of the Rings algorithm,
called FastRings [RSJ07], trade s space for time. In FastRings, all nodes of t he tree are
considered to be equivalent and assigned same size circles . This allows the algorithm to
start drawing the tree much so one r , when only