【導讀】AutoCAD工程圖形處理軟件，自1982年由美國Autodesk公司開發(fā)面世以來，員的普遍歡迎目前遍布150個國家和地區(qū)。AutoCAD是目前微機上應用最為廣泛的。通用的交互式計算機輔助繪圖與設(shè)計軟件包。AutoCAD的強大生命力在于它的通用。性、多種工業(yè)標準和開放的體系結(jié)構(gòu)。其通用性使得它在機械、電子、航空、輪船、建筑、服裝等領(lǐng)域得到了極為廣泛的應用，是CAD工業(yè)的旗幟產(chǎn)品。圖形格式已經(jīng)成為一種事實上的國際工業(yè)標準。全世界近千萬的專業(yè)和非專業(yè)程序設(shè)計人員正在用VB開發(fā)各種類型的。我國高校已經(jīng)把VB列入高等教育教學計劃。用VB進行AutoCAD二次開發(fā)，不論是用。件，均是十分有效的手段和方法。運動進行動態(tài)演示,并分析該機構(gòu)的運動特性。AutoCAD具有廣泛的適應性，它可以在各種操作系統(tǒng)支持的微型計。這就為AutoCAD的普及創(chuàng)造了條件。具有通用性、易用性，適用于各類用戶此外，從AutoCAD2021. 及局部打開和局部加載的功能，從而使AutoCAD系統(tǒng)更加完善...但與AutoCAD分開銷售。

　　

【正文】 i)), / h, vbBlue (0, 0)(360, 0), vbBlue Case C 點位置曲線 N = 1 = vbRed = i = YC(i) = i = 0 (i, YC(i)), / h, vbBlue (0, 0)(360, 0), vbBlue Case CD 桿角速度曲線 N = 2 = vbRed = i = ωCD(i) = i 第 36 頁 共 65 頁 = 0 (i, ωCD(i)), / h, vbBlue (0, 0)(360, 0), vbBlue Case CD 桿角加速度曲線 N = 2 = vbRed = i = εCD(i) = i = 0 (i, εCD(i)), / h, vbBlue (0, 0)(360, 0), vbBlue Case G 點速度曲線 N = 3 = vbRed = i = VYG(i) = i = 0 (i, VYG(i)), / h, vbBlue (0, 0)(360, 0), vbBlue Case G 點加速度曲線 N = 3 = vbRed = i = aYG(i) 第 37 頁 共 65 頁 = i = 0 (i, aYG(i)), / h, vbBlue (0, 0)(360, 0), vbBlue Case G 點位置曲線 N = 3 = vbRed = i = YG(i) = i = 0 (i, YG(i)), / h, vbBlue (0, 0)(360, 0), vbBlue End Select If N = 0 Then With .Col = 1 .Row = 2 .CellForeColor = vbRed .Text = Format(ωAB(i), 0. 00) .Row = 3 .CellForeColor = vbRed .Text = Format(εAB(i), ) End With End If If N = 1 Then 第 38 頁 共 65 頁 With .Col = 0 .Row = 2 .Text = C 點速度 .Row = 3 .Text = C 點加速度 .Col = 1 .Row = 2 .CellForeColor = vbRed .Text = Format(VYC(i), ) .Row = 3 .CellForeColor = vbRed .Text = Format(aYC(i), ) End With End If If N = 2 Then With .Col = 0 .Row = 2 .Text = CD 角速度 .Row = 3 .Text = CD 角加速度 .Col = 1 .Row = 2 .CellForeColor = vbRed .Text = Format(ωCD(i), ) .Row = 3 .CellForeColor = vbRed 第 39 頁 共 65 頁 .Text = Format(εCD(i), ) End With End If If N = 3 Then With .Col = 0 .Row = 2 .Text = G 點速度 .Row = 3 .Text = G 點加速度 .Col = 1 .Row = 2 .CellForeColor = vbRed .Text = Format(VYG(i), ) .Row = 3 .CellForeColor = vbRed .Text = Format(aYG(i), ) End With End If With .Col = 1 .Row = 1 .CellForeColor = vbRed .Text = 這部分代碼實現(xiàn)的是顯示動態(tài)曲線。 （ 4）三維仿真窗口的功能與制作： 設(shè)置 AutoCAD 應用程序?qū)ο蟆? 第 40 頁 共 65 頁 三維實體造型。 VB向 AutoCAD 命令行發(fā)送 AutoCAD 命令。 三維動畫演示 三維仿真窗體的 控件及屬性如表 3： 控件 屬性 Command1 動畫播放 Command2 參數(shù)設(shè)置 Command3 返回 Command4 退出 Label1 請輸入轉(zhuǎn)角 Label2 速度控制 Slider1 Slider1 Text1 Text1 表 3 三維仿真窗體如圖 6： 圖 6 三維仿真窗體界面 三維仿真窗體部分代碼： 變量聲明的代碼： Option Explicit Dim 凸輪 OA As Acad3DSolid Dim 環(huán)體 1 As Acad3DSolid Dim 環(huán)體 2 As Acad3DSolid Dim AB As Acad3DSolid 第 41 頁 共 65 頁 Dim BC As Acad3DSolid Dim CD As Acad3DSolid Dim DG As Acad3DSolid Dim 凸輪 EF As Acad3DSolid Dim 圓柱 D As Acad3DSolid Dim GP As Acad3DSolid Dim DQ As Acad3DSolid Dim 導軌 1 As Acad3DSolid Dim 導軌 2 As Acad3DSolid Dim 沖頭 1 As Acad3DSolid Dim 沖頭 2 As Acad3DSolid Dim 齒輪 1 As Acad3DSolid Dim 齒輪 2 As Acad3DSolid Dim 銷釘 1 As Acad3DSolid Dim 銷釘 2 As Acad3DSolid Dim 銷釘 3 As Acad3DSolid Dim 銷釘 4 As Acad3DSolid Dim 銷釘 5 As Acad3DSolid Dim 機架 1 As Acad3DSolid Dim 機架 2 As Acad3DSolid Dim 機架 3 As Acad3DSolid Dim 機架 4 As Acad3DSolid Dim 滑塊 As Acad3DSolid Dim 鉸鏈 1 As Acad3DSolid Dim 鉸鏈 2 As Acad3DSolid Dim 鉸鏈 3 As Acad3DSolid Dim 鉸鏈 4 As Acad3DSolid Dim 鉸鏈 5 As Acad3DSolid Dim 鉸鏈 6 As Acad3DSolid 第 42 頁 共 65 頁 Dim 鉸鏈 7 As Acad3DSolid Dim 鉸鏈 8 As Acad3DSolid Dim 鉸鏈 9 As Acad3DSolid Dim 鉸鏈 10 As Acad3DSolid Dim B, C As Single 對 AutoCAD2021 的調(diào)用： Private Sub Command4_Click() 窗口結(jié)束 .Show Unload 窗口主菜單 Unload Me 機構(gòu) Set 機構(gòu) CAD = Nothing End Sub Private Sub Form_Load() On Error Resume Next = 0 = 0 Set 機構(gòu) CAD = GetObject(, ) If Err Then Set 機構(gòu) CAD = CreateObject() If Err Then MsgBox 不 能 運 行 AutoCAD2021, 請 檢 查 是 否 安 裝 了AutoCAD2021 窗口主菜單 .Show Unload Me 第 43 頁 共 65 頁 Exit Sub End If End If 三維模型生成函數(shù)部分代碼： 變量聲明代碼： Private Sub 生成三維模型 () On Error Resume Next Dim center1(2) As Double Dim center2(2) As Double Dim center3(2) As Double Dim center4(2) As Double Dim center5(2) As Double Dim center6(2) As Double Dim center7(2) As Double Dim center8(2) As Double Dim center9(2) As Double Dim center10(2) As Double Dim center11(2) As Double Dim center12(2) As Double Dim center13(2) As Double Dim center14(2) As Double Dim center15(2) As Double Dim center16(2) As Double Dim center17(2) As Double Dim center18(2) As Double Dim centerTem(2) As Double Dim centerTem1(2) As Double Dim rotatePt1(0 To 2) As Double Dim rotatePt2(0 To 2) As Double 第 44 頁 共 65 頁 Dim rotateAngle As Double Dim radius As Double Dim RotTem As Double 建模 部分 代碼： 機構(gòu) 機構(gòu) Dim newdirection(0 To 2) As Double 39。設(shè)置三維視點 newdirection(0) = 0: newdirection(1) = : newdirection(2) = 機 構(gòu) = newdirection 機構(gòu) = 機構(gòu) 39。生成各零件三維模型 radius = LOA / 4 center1(0) = 0: center1(1) = 0: center1(2) = 0 center2(0) = XA(0): center2(1) = YA(0): center2(2) = 0 center3(0) = XB(0): center3(1) = YB(0): center3(2) = 0 center4(0) = XC(0): center4(1) = YC(0): center4(2) = 0 center5(0) = XD(0): center5(1) = YD(0): center5(2) = 0 center6(0) = XF(0): center6(1) = YF(0): center6(2) = 0 center7(0) = XG(0): center7(1) = YG(0): center7(2) = 0 center8(0) = XQ(0): center8(1) = YQ(0): center8(2) = 0 center9(0) = XP(0): center9(1) = YP(0): center9(2) = 0 center10(0) = XE: center10(1) = YE: center10(2) = 0 center11(0) = 0: center11(1) = 0: center11(2) = LOA / 1 center12(0) = XE: center12(1) = YE: center12(2) = LOA / 1 center13(0) = XA(0): center13(1) = YA(0): center13(2) = LOA / 2 第 45 頁 共 65 頁 center14(0) = h / 2: center14(1) = YGmin * LGP: center14(2) = * LOA / 1 center15(0) = XG(0): center15(1) = YGmin * LGP + LOA / 2 + LGP / 12: center15(2) =