form1.frm

vb单摆很好的东西

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   9210
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   6960
   LinkTopic       =   "Form1"
   ScaleHeight     =   9210
   ScaleWidth      =   6960
   StartUpPosition =   2  '屏幕中心
   Begin VB.CommandButton Command4 
      Caption         =   "起始角度"
      Height          =   375
      Left            =   3600
      TabIndex        =   5
      Top             =   240
      Width           =   1215
   End
   Begin VB.CommandButton Command3 
      Caption         =   "提示/帮助"
      Height          =   375
      Left            =   5160
      TabIndex        =   4
      Top             =   240
      Width           =   1215
   End
   Begin VB.CommandButton Command2 
      Caption         =   "设定摆长"
      Height          =   375
      Left            =   2040
      TabIndex        =   3
      Top             =   240
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "开始"
      Height          =   375
      Left            =   360
      TabIndex        =   1
      Top             =   240
      Width           =   1215
   End
   Begin VB.OptionButton Option1 
      Caption         =   "顶点"
      Height          =   255
      Left            =   2760
      TabIndex        =   0
      Top             =   1200
      Width           =   855
   End
   Begin VB.Timer Timer1 
      Enabled         =   0   'False
      Interval        =   20
      Left            =   6240
      Top             =   1800
   End
   Begin VB.Label Label1 
      Caption         =   "Label1"
      Height          =   255
      Left            =   3720
      TabIndex        =   2
      Top             =   1200
      Width           =   2175
   End
   Begin VB.Shape Shape1 
      Height          =   375
      Left            =   2655
      Shape           =   3  'Circle
      Top             =   3480
      Width           =   375
   End
   Begin VB.Line Line1 
      X1              =   2835
      X2              =   2835
      Y1              =   1425
      Y2              =   3480
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim l As Integer
Dim i As Integer
Dim k As Boolean

Private Sub Command1_Click()

If Command1.Caption = "开始" Then
   Command1.Caption = "暂停"

   Timer1.Enabled = True
Else
   Command1.Caption = "开始"
   Timer1.Enabled = False
End If

End Sub

Private Sub Command2_Click()
Dim m
m = InputBox("请你输入你需要的摆长，主意摆长不要过大！", "数据输入")
If m = "" Then
   MsgBox "警告，你没有输入数据，程序将按照设定摆长执行！", vbOKOnly, "警告"
Else
   Label1.Caption = "摆绳长度为：" & m
   l = m
   Line1.X2 = Line1.X1
   Line1.Y2 = Line1.Y1 + m
   Shape1.Left = Line1.X2 - 187.5
   Shape1.Top = Line1.Y2
End If

End Sub

Private Sub Command3_Click()
MsgBox "  由于电脑中像素和事迹的长度需要一定的转换，所以这里只是进行了一定的模拟，无法反映真实的情况，如果有需要请在物理实验室进行此类试验。", vbOKOnly, "提示/警告"
End Sub

Private Sub Command4_Click()
Dim n
n = InputBox("属于摆绳的起始角度，再-20-+20之间", "数据输入（正数为右，负数之为左）")
If n = "" Then
   MsgBox "警告，你没有输入数据，程序将按照设定角度执行！", vbOKOnly, "警告"
Else
   i = n
   Line1.X2 = Line1.X1 - Sin(i * 3.1415926 / 180) * l
   Line1.Y2 = Line1.Y1 + Cos(i * 3.1415926 / 180) * l
   Shape1.Left = Line1.X2 - 187.5
   Shape1.Top = Line1.Y2
End If

End Sub

Private Sub Form_Load()
   k = True
   Label1.Caption = ""
   l = Sqr((Line1.X2 - Line1.X1) * (Line1.X2 - Line1.X1) + (Line1.Y2 - Line1.Y1) * (Line1.Y2 - Line1.Y1))
   Label1.Caption = "摆绳长度为：" & l
End Sub

Private Sub Timer1_Timer()
Dim X2 As Integer
Dim Y2 As Integer

If k = True Then
Line1.X2 = Line1.X1 - Sin(i * 3.1415926 / 180) * l
Line1.Y2 = Line1.Y1 + Cos(i * 3.1415926 / 180) * l
i = i - 1
  If i < -30 Then
     k = False
  End If
ElseIf k = False Then
Line1.X2 = Line1.X1 - Sin(i * 3.1415926 / 180) * l
Line1.Y2 = Line1.Y1 + Cos(i * 3.1415926 / 180) * l
i = i + 1
   If i > 30 Then
      k = True
   End If
End If

Shape1.Left = Line1.X2 - 187.5
Shape1.Top = Line1.Y2

End Sub