Figure 6

Rotation-based crossover operate. Illustration of rotation-based crossover: (a) and (b) are the parent conformations; (c) is the offspring without rotation; (d) shows the 3 squares in one partitioning of neighbours; (e) shows the corresponding label permutation for rotation angle 90°, 180° and 270°; (f) shows the 4 offspring with the part in red rotated 0°, 90°, 180° and 270°; (g), (i) and (j) illustrate triangle-hexagon-based rotation.