鞍面在轴测投影中的等高线

GeoGebra 命令及参数

1. Segment(D, A') → f
2. Segment(A', B) → g
3. Line(B, f) → h
4. Line(D, g) → i
5. Intersect(h, i) → C'
6. Segment(D, C') → j
7. Segment(C', B) → k
8. OrthogonalLine(A', g) → l
9. OrthogonalLine(C', j) → m
10. Point(l) → A
11. Point(m) → C
12. Segment(A, A') → n
13. Segment(C, C') → p
14. Segment(D, A) → q
15. Segment(A, B) → r
16. Segment(B, C) → s
17. Segment(C, D) → t
18. Line(D, C) → s_2
19. Intersect(s_2, r) → E
20. Segment(C, E) → a
21. Line(E, n) → b
22. Intersect(i, b) → F
23. Intersect(g, b) → G
24. Segment(E, F) → f_1
25. Segment(F, C') → c
26. Line(F, k) → d
27. Line(B, j) → e
28. Intersect(d, e) → H
29. Segment(F, H) → g_1
30. Segment(H, B) → h_1
31. Line(G, k) → i_1
32. Intersect(j, i_1) → I
33. Segment(G, I) → j_1
34. Segment(H, I) → k_1
35. Intersect(k, k_1) → J
36. Line(I, n) → l_1
37. Line(J, l_1) → m_1
38. Intersect(t, l_1) → K
39. Intersect(s, m_1) → L
40. Segment(K, I) → q_1
41. Segment(L, J) → t_1
42. Segment(J, I) → a_1
43. Point(a_1) → M
44. Line(M, j_1) → c_1
45. Intersect(j, c_1) → N
46. Intersect(c_1, g) → O
47. Line(N, n) → d_1
48. Line(O, d_1) → e_1
49. Segment(K, I) → n_1
50. Intersect(d_1, t) → P
51. Intersect(e_1, r) → Q
52. Segment(P, Q) → f_2
53. Line(M, n) → g_2
54. Intersect(g_2, f_2) → R
55. Locus(R, M) → ponthalmaz1
56. Segment(L, J) → p_1
57. Segment(D, C) → r_1
58. Segment(C, B) → s_1
59. Segment(A, D) → b_1
60. Intersect(r_1, b_1) → T
61. Intersect(r_1, s_1) → U
62. Point(r_1) → V
63. Intersect(h_1, s_1) → S
64. Segment(A, S) → h_2
65. Intersect(b_1, h_2) → W
66. Polygon(D, U, S, W) → q1, d_2, u, s_3, w
67. Point(ponthalmaz1) → Z
68. Point(ponthalmaz1) → A_1
69. Point(ponthalmaz1) → B_1
70. Point(ponthalmaz1) → C_1
71. Point(ponthalmaz1) → D_1
72. Point(ponthalmaz1) → E_1
73. Point(ponthalmaz1) → F_1
74. Point(ponthalmaz1) → G_1
75. Point(ponthalmaz1) → H_1
76. Polygon(U, S, G_1, H_1, K, L, Z, A_1, B_1, C_1, D_1, E_1, F_1) → poligon1, u_1, p_2, q_2, r_2, k_3, s_4, l_2, z_1, i_2, j_2, k_2, m_2, n_2