道路标志背后的斜率数学

GeoGebra 命令及参数

1. SelectedIndex(ddMenu) → is
2. Rotate(D, 24.22°, C) → D'
3. Intersect(Segment[D, E], Segment[C, D']) → SAL
4. Segment(D, SAL) → segmDSAL
5. Rotate(C, -24.22°, D) → C'
6. Intersect(Segment[C, E], Segment[D, C']) → DIS
7. Segment(C, DIS) → segmDISC
8. Point(If[is ≟ 2, segmDSAL, segmDISC]) → ONBPT
9. Angle(ONBPT, D, C) → angDisc
10. If(onboarding, 8, 0) → pulsingSpeed
11. Circle(ONBPT, pulsing) → pulsingObject
12. Polygon({C, D, ONBPT}) → triSAL
13. Polygon({C, ONBPT, D}) → triDISC
14. Angle(D, C, D') → angSalMax
15. Angle(C', D, C) → angDiscMax
16. Angle(D, C, ONBPT) → angSal
17. Segment(OR1, OR2) → segmOr
18. Segment(DISCVERT, OR1) → segmDiscVert
19. Segment(SALVERT, OR2) → segmSalVert
20. Point(Segment[C, ONBPT], 0.25) → TEMP1
21. Translate(TEMP1, Vector[(((1 + percSal / 100) * 2.5) * UnitOrthogonalVector[Segment[C, ONBPT]])]) → POSS
22. Segment(OR1, SALVERT) → segmSal
23. Polygon({OR1, OR2, SALVERT}) → poliSal
24. Polygon({OR1, OR2, DISCVERT}) → poliDisc
25. Segment(DISCVERT, OR2) → segmDisc
26. Angle(OR2, OR1, SALVERT) → angSalTri
27. Angle(DISCVERT, OR2, OR1) → angDiscTri