生成所有圆锥曲线

GeoGebra 命令及参数

1. Line(A_1, B_1) → f
2. Point(f) → C
3. Ray(C, B_1) → j
4. Point(j) → R
5. Circle(C, R) → c
6. Point(c) → A
7. Mirror(A, f) → A'
8. Line(C, A') → g
9. Point(f) → B
10. Circle(C, B) → d
11. Intersect(c, f, 2) → D_1
12. Circle(R, Segment[C, R]) → e
13. Intersect(e, f, 2) → E
14. Line(A, B) → h
15. Intersect(g, h) → D
16. Mirror(E, C) → E'
17. Segment(E', E) → i
18. Ray(E', A_1) → k
19. Segment(A', A) → l
20. Locus(D, A) → loc1
21. Locus(D, A) → loc2