用asp实现无组件生成验证码的方法2种(2)
DotData(8) = Array(1, 80, 30, 100, 80, 100, 100, 70, 100, 20, 70, 1, 30, 1, 1, 20, 1, 40, 30, 50, 70, 50, 100, 40)
Dim vExtent : vExtent = Width / Count
Margin(0) = Border + vExtent * (Rnd * Offset) / 100 + Margin(1)
Margin(1) = vExtent * (pNumber + 1) - Border - vExtent * (Rnd * Offset) / 100
Margin(2) = Border + Height * (Rnd * Offset) / 100
Margin(3) = Height - Border - Height * (Rnd * Offset) / 100
Dim vStartX, vEndX, vStartY, vEndY
Dim vWidth, vHeight, vDX, vDY, vDeltaT
Dim vAngle, vLength
vWidth = Int(Margin(1) - Margin(0))
vHeight = Int(Margin(3) - Margin(2))
' 起始坐标
vStartX = Int((DotData(pIndex)(0)-1) * vWidth / 100)
vStartY = Int((DotData(pIndex)(1)-1) * vHeight / 100)
Dim i, j
For i = 1 To UBound(DotData(pIndex), 1)/2
If DotData(pIndex)(2*i-2) <> 0 And DotData(pIndex)(2*i) <> 0 Then
' 终点坐标
vEndX = (DotData(pIndex)(2*i)-1) * vWidth / 100
vEndY = (DotData(pIndex)(2*i+1)-1) * vHeight / 100
' 横向差距
vDX = vEndX - vStartX
' 纵向差距
vDY = vEndY - vStartY
' 倾斜角度
If vDX = 0 Then
vAngle = Sgn(vDY) * 3.14/2
Else
vAngle = Atn(vDY / vDX)
End If
' 两坐标距离
If Sin(vAngle) = 0 Then
vLength = vDX
Else
vLength = vDY / Sin(vAngle)
End If
' 随机转动角度
vAngle = vAngle + (Rnd - 0.5) * 2 * Angle * 3.14 * 2 / 100
vDX = Int(Cos(vAngle) * vLength)
vDY = Int(Sin(vAngle) * vLength)
If Abs(vDX) > Abs(vDY) Then vDeltaT = Abs(vDX) Else vDeltaT = Abs(vDY)
For j = 1 To vDeltaT
SetDot Margin(0) + vStartX + j * vDX / vDeltaT, Margin(2) + vStartY + j * vDY / vDeltaT
Next
vStartX = vStartX + vDX
vStartY = vStartY + vDY
内容版权声明:除非注明,否则皆为本站原创文章。