vb6.0 用pset方法编写一个在窗体上动态画正弦的程序。求代码。带图 30
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Private Sub Command1_Click()
Const pi = 3.14159
Me.AutoRedraw = True
'首先清除me内的图形
Me.Cls
'Scale方法设定用户坐标系，坐标原点在me中心
Me.ScaleMode = 0
Me.ScaleMode = 3
Me.Scale (-10, 10)-(10, -10)
'设置绘线宽度
Me.DrawWidth = 1
'绘坐标系的X轴及箭头线
Me.Line (-10, 0)-(10, 0), vbBlue
Me.Line (9, 0.5)-(10, 0), vbBlue
Me.Line -(9, -0.5), vbBlue
Me.ForeColor = vbBlue
Me.Print "X"
'绘坐标系的Y轴及箭头线
Me.Line (0, 10)-(0, -10), vbBlue
Me.Line (0.5, 9)-(0, 10), vbBlue
Me.Line -(-0.5, 9), vbBlue
Me.Print "Y"
'指定位置显示原点O
Me.CurrentX = 0.5
Me.CurrentY = -0.5
Me.Print "O"
'重设绘线宽度
Me.DrawWidth = 2
'用For循环绘点，使其按正弦规律变化。步长值很小，使其形成动画效果
For a = -2 * pi To 2 * pi Step pi / 6000
Me.PSet (a, Sin(a) * 5), vbRed
DoEvents
Next
'指定位置显示描述文字
Me.CurrentX = pi / 2
Me.CurrentY = -7
Me.ForeColor = vbBlack
Me.Print "正弦曲线示意"
End Sub
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