Rotation angle
Symbol of rotation angle 
xi
besti
f(x) < f(best)
0
0
False
0
0
0
0
0
0
0
True
0
0
0
0
0
0
1
False
+1
−1
0
0
1
True
−1
+1
0
1
0
False
−1
+1
0
1
0
True
+1
−1
0
1
1
False
0
0
0
0
0
1
1
True
0
0
0
0
0
| Rotation angle | Symbol of rotation angle | ||||||
| xi | besti | f(x) < f(best) |
|
|
|
|
|
| 0 | 0 | False | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | True | 0 | 0 | 0 | 0 | 0 |
| 0 | 1 | False |
| +1 | −1 | 0 |
|
| 0 | 1 | True |
| −1 | +1 |
| 0 |
| 1 | 0 | False |
| −1 | +1 |
| 0 |
| 1 | 0 | True |
| +1 | −1 | 0 |
|
| 1 | 1 | False | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | True | 0 | 0 | 0 | 0 | 0 |