正多面体的两种投影:蒙日投影与轴测视图
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① 本范例演示立方体及其对偶正多面体在蒙日投影与轴测视图下的两种正交/斜投影效果。② 涉及核心数学概念包括立体几何中的正多面体、对偶多面体、投影变换(蒙日投影、轴测投影)以及空间几何关系。③ 作图要点:使用 Translate(平移)、Mirror(镜像)、Midpoint(中点)、Polygon(多边形)、Intersect(求交)、Segment(线段)等命令,配合点 i、j、T、e1‑e4、h、OO 及其变换后的 OO'、OO'' 等对象构建投影图形。④ 适合高中立体几何教学、大学几何课程演示及几何建模爱好者自学。
GeoGebra 命令及参数
Translate(OO, e1) → OO'_1Translate(OO, e2) → OO'_2Translate(OO, e3) → OO'_3Translate(OO, e4) → OO'_4Translate(OO, h) → OO'_5Mirror(OO'_5, OO) → OO''_1Midpoint(OO'_2, OO'_1) → A_3Mirror(OO, A_3) → OO'_6Mirror(OO'_6, OO'_2) → OO''_2Mirror(OO'_6, OO'_1) → OO''_3Mirror(OO''_3, OO'_4) → OO'''_1Midpoint(OO'_5, OO'_2) → B_2Mirror(OO, B_2) → OO'_7Mirror(OO'_7, OO'_5) → OO''_4Mirror(OO'_7, OO) → OO''_5Mirror(OO''_4, OO) → C_2Midpoint(OO'_5, OO'_1) → D_3Mirror(OO, D_3) → OO'Mirror(OO', OO'_5) → OO''_6Mirror(OO', OO) → OO''Mirror(OO'', OO''_1) → OO'''Midpoint(C_2, OO'') → E_1Mirror(OO''_1, E_1) → BMirror(B, OO'') → CMirror(C, OO''_5) → DMirror(D, OO''') → AMirror(A, OO'_6) → FMirror(F, OO'_7) → GMirror(G, OO''_6) → HMirror(H, OO''_4) → EPolygon(E, H, G, F) → многоугольник1, h''', h'', h', h_1Polygon(B, C, D, A) → многоугольник2, f, f', f'', f'''Polygon(G, H, C, B) → многоугольник3, h'_1, h''_1, f'_1, f_1Polygon(F, G, B, A) → многоугольник4, h_2, h'_2, f_2, f'''_1Polygon(E, F, A, D) → многоугольник5, h'''_1, h_3, f'''_2, f''_1Polygon(C, H, E, D) → многоугольник6, f'_2, h''_2, h'''_2, f''_2Midpoint(G, C) → F_1Polygon(C, H, E, D, A, F, G, B) → многоугольник7, c_1, c1, d1, d_1, a_1, a1, b1, b_1Polygon(D, A, F, E) → многоугольник8, d, a_2, a1_1, d1_1Polygon(E, F, A, D) → многоугольник9, d1_2, a1_2, a_3, d_2Polygon(F, G, B, A) → многоугольник10, a1_3, b1_1, b_2, a_4Polygon(F, G, B, A) → многоугольник11, a1_4, b1_2, b_3, a_5Polygon(B, A, D, C) → многоугольник12, b_4, a_6, d_3, c_2Polygon(B, C, D, A) → многоугольник13, b_5, c_3, d_4, a_7Intersect(yAxis, xAxis) → D_2Polygon(D_2, A_2, 4) → mnohoúhelník1, d_5, a_8, g, k, F_2, E_2Polygon(B_1, C_1, 4) → mnohoúhelník2, a_9, d_6, l, m, D_1, A_1Midpoint(E_2, A_2) → IMidpoint(C_1, A_1) → JMidpoint(k) → KMidpoint(a_8) → LMidpoint(g) → MMidpoint(d_5) → NMidpoint(a_9) → OMidpoint(d_6) → PMidpoint(m) → QMidpoint(l) → RPolygon(OO'_5, OO'_4, OO'_1) → mnohoúhelník3, oo'_1, oo'_5, oo'_4Intersect(oo'_4, oo'_1) → SIntersect(oo'_4, oo'_5) → UPolygon(S, U, OO'_2) → mnohoúhelník4, oo'_2, s, uIntersect(oo'_5, oo'_1) → VPolygon(V, OO''_1, U) → mnohoúhelník5, u_1, v, oo''_1Intersect(u, s) → WIntersect(v, u_1) → ZPolygon(U, W, Z) → mnohoúhelník6, z, u_2, wPolygon(S, OO'_3, V) → mnohoúhelník7, v_1, s_1, oo'_3Intersect(s_1, v_1) → G_1Polygon(G_1, Z, W) → mnohoúhelník8, w_1, g_1, z_1Polygon(V, G_1, Z) → mnohoúhelník9, z_2, v_2, g_2Polygon(S, G, W) → mnohoúhelník18, w_2, s_2, g_3Polygon(S, E, V) → mnohoúhelník19, v_3, s_3, e_1Intersect(s_3, v_3) → H_1Polygon(H_1, V, U) → mnohoúhelník20, u_3, h_4, v_4Polygon(U, S, H_1) → mnohoúhelník21, h_5, u_4, s_4Polygon(U, Z, A) → mnohoúhelník22, a_{10}, u_5, z_3Intersect(z_3, u_5) → I_1Polygon(Z, W, I_1) → mnohoúhelník23, i_5, z_4, w_3Polygon(U, W, I_1) → mnohoúhelník24, i_6, u_6, w_4Polygon(C, V, Z) → mnohoúhelník25, z_5, c_4, v_5Intersect(v_5, z_5) → J_1Polygon(V, G_1, J_1) → mnohoúhelník26, j_5, v_6, g_4Polygon(G_1, Z, J_1) → mnohoúhelník27, j_6, g_5, z_6Intersect(s_2, w_2) → K_1Polygon(S, K_1, G_1) → mnohoúhelník28, g_6, s_5, k_3Polygon(K_1, G_1, W) → mnohoúhelník29, w_5, k_4, g_7Polygon(W, G_1, B) → mnohoúhelník30, b_6, w_6, g_8Intersect(g_8, w_6) → L_1Polygon(Z, G_1, L_1) → mnohoúhelník31, l_3, z_7, g_9Polygon(W, Z, L_1) → mnohoúhelník32, l_4, w_7, z_8Polygon(D, V, Z) → mnohoúhelník33, z_9, d_7, v_7Intersect(v_7, z_9) → M_1Polygon(U, V, M_1) → mnohoúhelník34, m_3, u_7, v_8Polygon(U, Z, M_1) → mnohoúhelník35, m_4, u_8, z_{10}Polygon(H, V, S) → mnohoúhelník39, s_8, h_6, v_9Intersect(v_9, s_8) → O_1Polygon(O_1, S, G_1) → mnohoúhelník40, g_{10}, o_2, s_9Polygon(O_1, V, G_1) → mnohoúhelník41, g_{11}, o_3, v_{10}Polygon(F, U, S) → mnohoúhelník42, s_{10}, f_3, u_{11}Intersect(u_{11}, s_{10}) → P_1Polygon(P_1, S, W) → mnohoúhelník44, w_{11}, p_3, s_{11}Segment(E_2, A_2) → t_1Segment(F_2, D_2) → t_2Segment(C_1, A_1) → t_3Segment(D_1, B_1) → t_4Segment(M, I) → nSegment(I, N) → pSegment(K, I) → qSegment(I, L) → rSegment(M, L) → i_1Segment(L, N) → j_1Segment(N, K) → k_1Segment(K, M) → l_1Segment(O, P) → m_1Segment(P, R) → n_1Segment(R, Q) → p_1Segment(Q, O) → q_1Segment(O, J) → r_1Segment(J, P) → i_2Segment(J, R) → j_2Segment(J, Q) → k_2Polygon(S, W, G_1) → mnohoúhelník10, g_{12}, s_6, w_8
AI 绘图提示语参考
绘制一个立方体及其对偶多面体,并展示两种投影:正投影和斜投影。首先画出立方体的六个面,然后通过镜像和平移操作生成对偶多面体。接着,分别绘制正投影和斜投影的视图。最后,连接关键点形成多边形,展示立方体和对偶多面体的结构。
以上提示语为根据原始绘图命令整理而来,仅供参考。