正方形截面：步骤五 - 解析几何中的曲面构造

GeoGebra 命令及参数

1. Root(f) → R1, R2
2. Segment(R1, R2) → a
3. Point(a) → A
4. Segment(A, B) → b
5. Polygon(A, B, (x(B), y(B), y(B)), (x(A), y(A), y(B))) → poly1, a_1, b_1, c, d
6. CurveCartesian(t, 0, f(t), t, 1, 5) → e
7. CurveCartesian(t, f(t), f(t), t, 1, 5) → g
8. Surface(u + ((1 - u) * t), (u * 0) + ((1 - u) * 0), (u * 0) + ((1 - u) * f(t)), u, 0, 1, t, 1, 5) → h
9. Surface((u * t) + ((1 - u) * t), (u * 0) + ((1 - u) * f(t)), (u * f(t)) + ((1 - u) * f(t)), u, 0, 1, t, 1, 5) → i
10. Surface((u * t) + ((1 - u) * t), (u * f(t)) + ((1 - u) * f(t)), (u * 0) + ((1 - u) * f(t)), u, 0, 1, t, 1, 5) → j