请教 请教
请问 ：我要把这个雷达扫描动画程序 修改为 半圆 来回扫描效果 怎么修改啊？ 希望各位高抬贵手，谢谢！！Dim CAngle As Integer 'Current Angle (Not Class Angle)
Private Sub Form_Load() '初始化
CAngle = 0
Me.BackColor = vbBlack
Me.BorderStyle = 3
Me.FillColor = vbYellow
Me.ForeColor = vbGreen
Me.FillStyle = 1
Me.ScaleMode = 3 'Pixel
Me.Width = 4590
Me.Height = 4980
Timer1.Interval = 10
End Sub
Private Sub Timer1_Timer()
Cls
Circle (150, 150), 130
If CAngle = 179 Then CAngle = 0 Else CAngle = CAngle - 1
Raida CAngle '绘制雷达
RaidaTarget 0.5, 20 '定义雷达目标1
RaidaTarget 0.7, 200 '定义雷达目标2
RaidaTarget 0.2, 100 '定义雷达目标3
RaidaTarget 0.9, 257 '定义雷达目标4
End Sub
Private Sub Raida(ByVal angle As Integer) '根据所给角度绘制雷达
Dim x As Single, y As Single, a As Single, _
ae As Single, g As Integer
g = 0
ae = angle - 45
For a = ae To angle
x = Cos(D2R(a)) * 130 + 150
y = Sin(D2R(a)) * 130 + 150
g = (a - ae) / 20 * 255
Line (150, 150)-(x, y), RGB(0, g, 0)
Next a
End Sub
Private Sub RaidaTarget(ByVal Row As Single, ByVal Thita As Integer) '根据雷达扫描区域绘制目标
Dim x As Integer, y As Integer
x = Cos(D2R(Thita)) * Row * 130 + 150
y = Sin(D2R(Thita)) * Row * 130 + 150
Form1.FillStyle = 0
If Me.Point(x, y) <> 0 Then Circle (x, y), 5, RGB(255, 255, 0) '如果雷达扫到目标则显示
Form1.FillStyle = 1
End Sub
Public Function D2R(ByVal d As Integer) As Single
D2R = CDbl(d) * (3.14159265359 / 180)
End Function --------------------编程问答--------------------
Option Explicit
Dim CAngle As Integer 'Current Angle (Not Class Angle)
Private Sub Form_Load() '初始化
CAngle = 0
Me.BackColor = vbBlack
Me.BorderStyle = 3
Me.FillColor = vbYellow
Me.ForeColor = vbGreen
Me.FillStyle = 1
Me.ScaleMode = 3 'Pixel
Me.Width = 4590
Me.Height = 4980
Timer1.Interval = 10
Timer2.Interval = 10
Timer2.Enabled = False
End Sub
Private Sub Timer2_Timer()
Cls
Circle (150, 150), 130
If CAngle = 0 Then
Timer2.Enabled = False
Timer1.Enabled = True
Else
CAngle = CAngle + 1
End If
Raida CAngle '绘制雷达
RaidaTarget 0.5, 20 '定义雷达目标1
RaidaTarget 0.7, 200 '定义雷达目标2
RaidaTarget 0.2, 100 '定义雷达目标3
RaidaTarget 0.9, 257 '定义雷达目标4
End Sub
Private Sub Timer1_Timer()
Cls
Circle (150, 150), 130
If CAngle < -180 Then
Timer1.Enabled = False
Timer2.Enabled = True
Else
CAngle = CAngle - 1
End If
Raida CAngle '绘制雷达
RaidaTarget 0.5, 20 '定义雷达目标1
RaidaTarget 0.7, 200 '定义雷达目标2
RaidaTarget 0.2, 100 '定义雷达目标3
RaidaTarget 0.9, 257 '定义雷达目标4
End Sub
Private Sub Raida(ByVal angle As Integer) '根据所给角度绘制雷达
Dim x As Single, y As Single, a As Single, _
ae As Single, g As Integer
g = 0
ae = angle - 45
For a = ae To angle
x = Cos(D2R(a)) * 130 + 150
y = Sin(D2R(a)) * 130 + 150
g = (a - ae) / 20 * 255
Line (150, 150)-(x, y), RGB(0, g, 0)
Next a
End Sub
Private Sub RaidaTarget(ByVal Row As Single, ByVal Thita As Integer) '根据雷达扫描区域绘制目标
Dim x As Integer, y As Integer
x = Cos(D2R(Thita)) * Row * 130 + 150
y = Sin(D2R(Thita)) * Row * 130 + 150
Form1.FillStyle = 0
If Me.Point(x, y) <> 0 Then Circle (x, y), 5, RGB(255, 255, 0) '如果雷达扫到目标则显示
Form1.FillStyle = 1
End Sub
Public Function D2R(ByVal d As Integer) As Single
D2R = CDbl(d) * (3.14159265359 / 180)
End Function
补充：VB , 控件
