
5.9. OTHER TREE DRAWING METHODS 185
(a) (b)
Figure 5.25 (a) Node and link diagram (top) and corresponding strands model (bottom).
(b) Screenshot of Botanical tree, taken from [KvdWW01].
(a) (b)
Figure 5.26 (a) A tr e e with root r and layer-labelings. (b) A minimum-layer upward
drawing of the tree in (a). Figure taken from [ASRR08].
Hexagonal t ree drawing [BBB
+
09] ( se e Figur e 5.29) allows drawings of degree-6 trees on
the hexagonal grid, which consists of equilateral triangles .
Most of the tree drawing algorithms draw trees on unbounded planes, and few of them
draw t r ee s on regions that are bounded by rectangles. However, certain applications, ...