四杆机构数学演示

GeoGebra 命令及参数

1. Segment(O, U) → f
2. Circle(U, O) → c_{2}
3. Point(c_{2}) → E
4. Segment(U, E) → g
5. Circle(O, U) → d_{2}
6. Circle(E, U) → e
7. Intersect(e, d_{2}) → D_{1}, F, ,
8. Segment(E, F) → h
9. Segment(F, O) → i
10. Segment(K, L) → r
11. Midpoint(r) → N
12. Circle(N, r) → c
13. Point(c) → O_{1}
14. Line(O_{1}, r) → a
15. Circle(O_{1}, r / 2) → d
16. Intersect(d, a, 1) → P
17. Intersect(d, a, 2) → Q
18. Segment(P, K) → b
19. Segment(Q, L) → f_1
20. Segment(P, Q) → j