圆锥曲线 by Pep Bujosa

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → M
2. Point(zAxis) → I
3. Line(I, M) → vertical
4. Point(xAxis) → C
5. Point(zAxis) → B
6. Intersect(zAxis, xAxis) → A
7. Cone(A, B, Radi) → a, c, b
8. Intersect(yAxis, b) → F, G
9. Line(B, G) → Gene
10. Sphere(A, C) → d
11. PointIn(d) → D
12. Line(D, A) → f
13. Intersect(zAxis, f) → H
14. OrthogonalLine(H, Gene, space) → Perpen
15. Point(f) → E
16. OrthogonalPlane(E, f) → e
17. IntersectPath(e, a) → g
18. Point(zAxis) → J
19. Cone(J, B, Radi) → k, h, i
20. IntersectPath(e, k) → q
21. Intersect(Perpen, d) → K, L
22. Eccentricity(g) → ecg
23. Eccentricity(q) → ecq
24. If(ecg ≟ 0 ∨ ecq ≟ 0, "Circumferència", If[ecg ≟ 1 ∨ ecq ≟ 1, "Paràbola", If[(ecg < 1) ∨ (ecq < 1), "El·lipse", If[(ecg > 1) ∨ (ecq > 1), "Hipèrbola", " "]]]) → Tipus