螺旋线构造演示

GeoGebra 命令及参数

1. Polygon(A, B, 3) → poly1, f, g, h, C
2. Point(yAxis) → D
3. OrthogonalLine(C, f) → i
4. Polygon(C, D, 3) → poly2, j, k, l, E
5. Intersect(g, k) → F
6. Polygon(C, F, 3) → poly3, m, n, p, G
7. Intersect(l, n) → H
8. Polygon(C, H, 3) → poly4, q, r, s, I
9. Intersect(p, r) → J
10. Polygon(C, J, 3) → poly5, t, a, b, K
11. Intersect(s, a) → L
12. Polygon(C, L, 3) → poly6, c, d, e, M
13. Intersect(d, b) → N
14. Polygon(C, N, 3) → poly7, f_1, g_1, h_1, O
15. Intersect(i, e) → P
16. Intersect(g_1, i) → Q
17. Polygon(C, Q, 3) → poly8, i_1, j_1, k_1, R
18. Intersect(g, j_1) → S
19. Intersect(j_1, h_1) → T
20. Polygon(C, T, 3) → poly9, l_1, m_1, n_1, U
21. Intersect(k_1, m_1) → V
22. Polygon(C, V, 3) → poly10, p_1, q_1, r_1, W
23. Intersect(poly9, poly10) → Z, A_1, B_1, C_1, D_1, E_1, F_1
24. Polygon(C, E_1, 3) → poly11, s_1, t_1, a_1, G_1
25. Intersect(r_1, t_1) → H_1
26. Polygon(C, H_1, 3) → poly12, b_1, c_1, d_1, I_1
27. Intersect(h, a_1) → J_1
28. Intersect(c_1, h) → K_1
29. Polygon(C, K_1, 3) → poly13, e_1, f_2, g_2, L_1
30. Intersect(i, j) → M_1
31. Intersect(poly1, poly2) → N_1, O_1, P_1, Q_1, R_1, S_1, T_1
32. Intersect(f_2, i) → U_1
33. Polygon(C, U_1, 3) → poly14, h_2, i_2, j_2, V_1
34. Intersect(g, m) → W_1
35. Intersect(g, m) → Z_1
36. Intersect(i_2, poly2) → A_2
37. Intersect(i_2, g) → B_2
38. Polygon(C, B_2, 3) → poly15, k_2, l_2, m_2, C_2
39. Intersect(l_2, l) → D_2
40. Polygon(C, D_2, 3) → poly16, n_2, p_2, q_2, E_2
41. PointIn(poly1) → Pointpoly1
42. PointIn(poly2) → Pointpoly2
43. PointIn(poly3) → Pointpoly3
44. PointIn(poly4) → Pointpoly4
45. PointIn(poly5) → Pointpoly5
46. PointIn(poly6) → Pointpoly6