Cairo瓷砖的p4对称性

GeoGebra 命令及参数

1. Midpoint(A, B) → E
2. Midpoint(C, A) → H
3. Midpoint(H, E) → P
4. Midpoint(C, B) → I
5. Segment(K, N) → h
6. Segment(J, K) → e
7. Mirror(K, P) → O
8. Segment(K, O) → m
9. Segment(O, L) → f
10. Segment(O, M) → g
11. Midpoint(B, D) → F
12. Midpoint(D, C) → G
13. Vector(A, B) → u
14. Vector(A, C) → v
15. Vector(C, D) → w
16. Vector(B, D) → a
17. Segment(H, F) → b
18. Segment(E, G) → c
19. Rotate(cell1, 90*°, I) → cell2
20. Rotate(cell1, 180*°, I) → cell3
21. Rotate(cell1, 270*°, I) → cell4
22. Sequence(Translate[Sequence[Translate[tile, Vector[(n * u)]], n, -3, 3], Vector[(m * v)]], m, -3, 3) → tiling
23. Segment(H, I) → k
24. Segment(E, I) → l