坐标平面（笛卡尔平面）

GeoGebra 命令及参数

1. Shuffle({1, 2, 3}) → allCaseNum, {1, 3, 2}
2. Element(allCaseNum, Mod[countQuestion, Length[allCaseNum]] + 1) → caseNum
3. Polygon({GRMIN + ((-offX), (-offY)), (x(GRMAX), y(GRMIN)) + (offX, (-offY)), GRMAX + (offX, offY), (x(GRMIN), y(GRMAX)) + ((-offX), offY)}) → peep
4. SelectedIndex(ddMenu) → is
5. Sequence((k, 0), k, -10, 10, 1) → xGrid
6. Sequence((0, k), k, 1, 16, 1) → yGrid
7. PointIn(peep) → ONBPT
8. circlePixels(ONBPT, 7 + (7 * pulsing), (xMin, yMin), (xMax, yMax), (PXwidth, PXheight)) → pulsingObject
9. Segment((x(GRMIN) - offX, 0), (x(GRMAX) + offX, 0)) → fakeX
10. Segment((0, y(GRMIN) - offY), (0, y(GRMAX) + offY)) → fakeY
11. Join(Sequence[Sequence[(j, k), j, x(GRMIN), x(GRMAX), 1], k, y(GRMIN), y(GRMAX), 1]) → bigGrid
12. Polygon({O, (x(GRMAX) + offX, 0), GRMAX + (offX, offY), (0, y(GRMAX) + offY)}) → quad1
13. Mirror(quad1, x = 0) → quad2
14. Mirror(quad2, y = 0) → quad3
15. Mirror(quad3, x = 0) → quad4
16. Segment((x(GRMIN) - offX, 0), (x(GRMAX) + offX, 0)) → fakeX2
17. Segment((0, y(GRMIN) - offY), (0, y(GRMAX) + offY)) → fakeY2
18. Point(bigGrid) → P
19. Segment(P, PX) → projX
20. Segment(P, PY) → projY
21. Segment(O, PX) → asc
22. Segment(O, PY) → ord
23. If(x(P) > 0 ∧ y(P) > 0, "in quadrant I", x(P) ≟ 0 ∧ y(P) ≠ 0, "on the \(y-\)axis", "on the \(x-\)axis", x(P) > 0 ∧ y(P) < 0, "in quadrant IV", x(P) < 0 ∧ y(P) > 0, "in quadrant II", x(P) < 0 ∧ y(P) < 0, "in quadrant III", x(P) ≟ 0 ∧ y(P) ≟ 0, "at the origin") → textQuadrNum
24. If(x(P) > 0, "positive", x(P) < 0, "negative", "zero") → textSegnX
25. If(y(P) > 0, "positive", y(P) < 0, "negative", "zero") → textSegnY
26. If(x(P) > 0, ">0", x(P) < 0, "<0", "=0") → textVersX
27. If(y(P) > 0, ">0", y(P) < 0, "<0", "=0") → textVersY