回复 19楼 V菜鸟V
唉，你太教条了。用数组可能在过去586时代还有点作用，毕竟计算一次，以后只需访问，可能会提高速度，毕竟浮点运算比较耗时，现在的电脑速度可以只需要运算就行了。为了避免你过于教条，我还是费了点时间修改你提供代码，你看我不用数组也让它转起来了（没花时间去画轨迹，应该也不难）。'拷贝下述代码到你给我们的工程里，全覆盖原代码
程序代码：'Option Explicit Const PI = 3.1415926 '定义π并赋值 Dim BL As Double 'picture的宽/长比例 Dim L1 As Double '曲柄的长度 Dim L2 As Double '连杆的长度 Dim L3 As Double '摇杆的长度 Dim xC As Double 'C点的横坐标 Dim yC As Double 'C点的纵坐标 Dim guaijiao As Double Dim changdu As Double Public Sub readdata() '读取输入参数 L1 = Val(shuru(2).Text) L2 = Val(shuru(3).Text) L3 = Val(shuru(4).Text) xC = Val(shuru(0).Text) yC = Val(shuru(1).Text) guaijiao = Val(shuru(5).Text) changdu = Val(shuru(6).Text) End Sub Public Function arctan(x1 As Double, y1 As Double, x2 As Double, y2 As Double) As Double '反正切函数 If x1 = x2 Then If y1 < y2 Then arctan = PI / 2 Else arctan = PI * 3 / 2 End If Else arctan = Atn((y2 - y1) / (x2 - x1)) If x1 > x2 Then arctan = arctan + PI Else If y1 > y2 Then arctan = arctan + 2 * PI End If End If End If End Function Public Function arccos(s As Double) As Double '反余弦函数 If s = 0 Then arccos = PI / 2 Else If s > 0 Then arccos = Atn(Sqr(1 - s ^ 2) / s) Else arccos = Atn(Sqr(1 - s ^ 2) / s) + PI End If End If End Function Private Sub Form_Load() Picture1.AutoRedraw = True '开启自动绘图属性 Call readdata BL = Picture1.Width / Picture1.Height Command2_Click End Sub Private Sub Command1_Click() '绘制初始位置的图形 Picture1.Cls Timer1.Enabled = False Call chushiweizhi End Sub Public Sub chushiweizhi() '初始位置绘制过程 Picture1.Scale (-80 * BL, 80)-(80 * BL, -80) Picture1.Line (0, 0)-(xA(0), yA(0)), RGB(0, 0, 0) Picture1.Line (xA(0), yA(0))-(xB(0), yB(0)), RGB(0, 0, 0) Picture1.Line (xB(0), yB(0))-(xC, yC), RGB(0, 0, 0) Picture1.Line (xA(0), yA(0))-(xG(0), yG(0)), RGB(0, 0, 0) Picture1.Circle (0, 0), 1, RGB(0, 0, 0) Picture1.Circle (xA(0), yA(0)), 1, RGB(0, 0, 0) Picture1.Circle (xB(0), yB(0)), 1, RGB(0, 0, 0) Picture1.Circle (xC, yC), 1, RGB(0, 0, 0) Dim k4 As Integer For k4 = 0 To 359 Picture1.Line (xG(k4), yG(k4))-(xG(k4 + 1), yG(k4 + 1)), RGB(0, 0, 0) Next k4 End Sub Private Sub Command2_Click() '绘制动态运动模拟过程 Picture1.Cls Timer1.Enabled = True Timer1.Interval = 50 Picture1.Scale (-80 * BL, 80)-(80 * BL, -80) End Sub Private Sub Timer1_Timer() '动态运动模拟过程绘制 Static k2 As Double Dim k3 As Double Dim xA As Double, yA As Double, β As Double, det As Double, α3 As Double Dim xB As Double, yB As Double, α2 As Double, xG As Double, yG As Double If k2 = 360 Then k2 = 0 If k2 = 0 Then k3 = 359 Else k3 = k2 - 1 End If xA = L1 * Cos(k3 * PI / 180): yA = L1 * Sin(k3 * PI / 180) β = arctan(xC, yC, xA, yA) det = arccos((L3 ^ 2 + (xA - xC) ^ 2 + (yA - yC) ^ 2 - L2 ^ 2) / (2 * L3 * Sqr((xA - xC) ^ 2 + (yA - yC) ^ 2))) α3 = det + β xB = xC + L3 * Cos(α3): yB = yC + L3 * Sin(α3) α2 = arctan(xA, yA, xB, yB) xG = xA + changdu * Cos(α2 + PI + guaijiao * PI / 180) yG = yA + changdu * Sin(α2 + PI + guaijiao * PI / 180) Picture1.Line (0, 0)-(xA, yA), Picture1.BackColor Picture1.Line (xA, yA)-(xB, yB), Picture1.BackColor Picture1.Line (xB, yB)-(xC, yC), Picture1.BackColor Picture1.Line (xA, yA)-(xG, yG), Picture1.BackColor Picture1.Circle (0, 0), 1, Picture1.BackColor Picture1.Circle (xA, yA), 1, Picture1.BackColor Picture1.Circle (xB, yB), 1, Picture1.BackColor Picture1.Circle (xC, yC), 1, Picture1.BackColor xA = L1 * Cos(k2 * PI / 180): yA = L1 * Sin(k2 * PI / 180) β = arctan(xC, yC, xA, yA) det = arccos((L3 ^ 2 + (xA - xC) ^ 2 + (yA - yC) ^ 2 - L2 ^ 2) / (2 * L3 * Sqr((xA - xC) ^ 2 + (yA - yC) ^ 2))) α3 = det + β xB = xC + L3 * Cos(α3): yB = yC + L3 * Sin(α3) α2 = arctan(xA, yA, xB, yB) xG = xA + changdu * Cos(α2 + PI + guaijiao * PI / 180) yG = yA + changdu * Sin(α2 + PI + guaijiao * PI / 180) Picture1.Line (0, 0)-(xA, yA), RGB(0, 0, 0) Picture1.Line (xA, yA)-(xB, yB), RGB(0, 0, 0) Picture1.Line (xB, yB)-(xC, yC), RGB(0, 0, 0) Picture1.Line (xA, yA)-(xG, yG), RGB(0, 0, 0) Picture1.Circle (0, 0), 1, RGB(0, 0, 0) Picture1.Circle (xA, yA), 1, RGB(0, 0, 0) Picture1.Circle (xB, yB), 1, RGB(0, 0, 0) Picture1.Circle (xC, yC), 1, RGB(0, 0, 0) Dim k5 As Integer For k5 = 0 To 359 ' Picture1.Line (xG(k5), yG(k5))-(xG(k5 + 1), yG(k5 + 1)), RGB(0, 0, 0) Next k5 k2 = k2 + 1 End Sub Private Sub Command3_Click() '暂停-开始按钮 If Command3.Caption = "暂停" Then Command3.Caption = "继续" Timer1.Enabled = False Else Command3.Caption = "暂停" Timer1.Enabled = True End If End Sub Private Sub Command4_Click(Index As Integer) '微调按钮 If Index Mod 2 = 0 Then shuru(Index / 2).Text = Val(shuru(Index / 2).Text) + 3 Else shuru((Index + 1) / 2 - 1).Text = Val(shuru((Index + 1) / 2 - 1).Text) - 3 End If Picture1.Cls Call readdata If Timer1.Enabled = False Then Call chushiweizhi '动态更新绘图区域的图形 End Sub
VB运动图.zip