移植一个vb版本的WaterDrop演示到vb.net

感谢原作者:

'************************VB版本云效果***********************
'**作者：      laviewpbt
'**QQ:         33184777
'**********************************************************

直接先上图:

///

移植难点总结如下:

1,  PictureBox 中图像数据的获取.

原代码

        'iRet = GetDIBits(hmemDC, xxx, 0, m_Height, pOldPixel, BmpInfo, DIB_RGB_COLORS)
        'iRet = GetDIBits(hmemDC, xxx, 0, m_Height, pPixel, BmpInfo, DIB_RGB_COLORS)

工作不正常. 找不到原因. 用如下代替:

        myBitmap = New Bitmap(Me.Image.Image)
...
        For i As Integer = 0 To m_Height - 1
            For j As Integer = 0 To m_Width - 1
                OldPixel(i * m_Width + j) = myBitmap.GetPixel(j, i).ToArgb And &HFFFFFFFF
                dispPixel(i * m_Width + j) = myBitmap.GetPixel(j, i).ToArgb And &HFFFFFFFF
            Next
        Next

2, 内存数据复制部分

原代码

       CopyMemory(Pixel(0), OldPixel(0), m_Width * m_Height * 4)

改为

        pPixel = System.Runtime.InteropServices.Marshal.UnsafeAddrOfPinnedArrayElement(dispPixel, 0)

...

        Dim r As New Rectangle(0, 0, m_Width, m_Height)
        Dim bmpData As Drawing.Imaging.BitmapData

        bmpData = myBitmap.LockBits(r, Drawing.Imaging.ImageLockMode.ReadOnly, Drawing.Imaging.PixelFormat.Format32bppArgb)
        myBitmap.UnlockBits(bmpData)
        CopyMemory(pPixel, bmpData.Scan0(), m_Width * m_Height * 4)

3,PictureBox绘图

原代码不工作.

<pre name="code" class="vb">    SetDIBitsToDevice(Me.hdc, 0, 0, m_Width, m_Height, 0, 0, 0, m_Height, pPixel, BmpInfo, DIB_RGB_COLORS)

改为单像素填充

<pre name="code" class="vb">        pos = Y * m_Width + X<pre name="code" class="vb">        wR = (dispPixel(pos) And &HFF0000) >> 16

        wG = (dispPixel(pos) And &HFF00) >> 8
        wB = dispPixel(pos) And &HFF
...

<pre name="code" class="vb">        myBitmap.SetPixel(X, Y, pixelColor)

Me.Image.Image = myBitmap 

///

代码:

'
' Form1.vb
'
' divilis # qq . com
'


Imports System.Math

Public Class Form1
    Private hdc As Long
    Private myOldBitmap As Bitmap
    Private myBitmap As Bitmap

    Private Sub Form1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Click
        If Timer1.Enabled Or Timer2.Enabled Then
            Timer1.Enabled = False
            Timer2.Enabled = False
        Else
            Timer1.Enabled = True
            Timer2.Enabled = True
        End If
    End Sub

    Private Sub Form_DblClick() Handles Me.DoubleClick
        Me.Close()
    End Sub


    Private Sub Form_Load() Handles Me.Load
        myBitmap = New Bitmap(Me.Image.Image)
        m_Width = myBitmap.Width
        m_Height = myBitmap.Height
        DoubleHeight = m_Height * 2

        With BmpInfo.bmiHeader
            .biSize = Len(BmpInfo.bmiHeader)
            .biWidth = m_Width
            .biHeight = m_Height
            .biPlanes = 1
            .biBitCount = 32
            .biCompression = BI_RGB
        End With

        ReDim OldPixel(3 * m_Width * m_Height - 1)
        ReDim dispPixel(3 * m_Width * m_Height - 1)
        ReDim WaveHeight(3 * m_Width * m_Height * 2 - 1)

        myOldBitmap = myBitmap.Clone()

    End Sub



    Private Sub DropWater(ByVal X As Long, ByVal Y As Long, ByVal Radius As Long, ByVal Height As Long)
        Dim Distance As Long
        Dim XX As Long
        Dim YY As Long
        Dim I As Long
        Dim J As Long
        Dim Ratio As Double
        Ratio = PI / Radius
        For I = -Radius To Radius
            For J = -Radius To Radius
                XX = X + I
                YY = Y + J
                If XX >= 0 And XX < m_Width And YY >= 0 And YY < m_Height Then
                    Distance = Sqrt(I * I + J * J)
                    If Distance <= Radius Then
                        WaveHeight(XX * m_Height * 2 + YY * 2 + CurrentHeightBuffer) = Height * Cos(Distance * Ratio)
                    End If
                End If
            Next
        Next
    End Sub

    Private Sub PaintWater()

        Dim TimeUse As Long

        Dim OffsetX As Long
        Dim OffsetY As Long
        Dim X As Long
        Dim Y As Long
        Dim Speed As Long
        Dim Fast As Long

        TimeUse = GetTickCount
        NewHeightBuffer = (CurrentHeightBuffer + 1) Mod 2

        Dim pPixel As System.IntPtr
        Dim pOldPixel As System.IntPtr
        Dim wB, wR, wG As Short
        Dim pixelColor As Color
        'Dim pixelColorInteger As Integer
        Dim pos As Integer

        pPixel = System.Runtime.InteropServices.Marshal.UnsafeAddrOfPinnedArrayElement(dispPixel, 0)
        pOldPixel = System.Runtime.InteropServices.Marshal.UnsafeAddrOfPinnedArrayElement(OldPixel, 0)

        myBitmap = myOldBitmap.Clone()
        'For i As Integer = 0 To m_Height - 1
        '    For j As Integer = 0 To m_Width - 1
        '        OldPixel(i * m_Width + j) = myBitmap.GetPixel(j, i).ToArgb And &HFFFFFFFF
        '        dispPixel(i * m_Width + j) = myBitmap.GetPixel(j, i).ToArgb And &HFFFFFFFF
        '    Next
        'Next

        Dim r As New Rectangle(0, 0, m_Width, m_Height)
        Dim bmpData As Drawing.Imaging.BitmapData

        bmpData = myBitmap.LockBits(r, Drawing.Imaging.ImageLockMode.ReadOnly, Drawing.Imaging.PixelFormat.Format32bppArgb)
        myBitmap.UnlockBits(bmpData)
        CopyMemory(pPixel, bmpData.Scan0(), m_Width * m_Height * 4)

        For X = 1 To m_Width - 2
            For Y = 1 To m_Height - 2
                Speed = X * DoubleHeight + Y * 2 + NewHeightBuffer
                Fast = X * DoubleHeight + Y * 2 + CurrentHeightBuffer
                WaveHeight(Speed) = _
                (WaveHeight(Fast - DoubleHeight) + _
                WaveHeight(Fast - DoubleHeight - 2) + _
                WaveHeight(Fast - 2) + _
                WaveHeight(Fast + DoubleHeight - 2) + _
                WaveHeight(Fast + DoubleHeight) + _
                WaveHeight(Fast + DoubleHeight + 2) + _
                WaveHeight(Fast + 2) + _
                WaveHeight(Fast - DoubleHeight + 2)) \ 4 - _
                WaveHeight(Speed)

                WaveHeight(Speed) = WaveHeight(Speed) - WaveHeight(Speed) \ 32
                OffsetX = (WaveHeight(Speed - DoubleHeight) - WaveHeight(Speed + DoubleHeight)) \ 16
                OffsetY = (WaveHeight(Speed - 2) - WaveHeight(Speed + 2)) \ 16
                If OffsetX <> 0 And OffsetY <> 0 Then
                    If X + OffsetX <= 0 Then
                        OffsetX = -X
                    ElseIf X + OffsetX >= m_Width - 1 Then
                        OffsetX = m_Width - X - 1
                    End If
                    If Y + OffsetY <= 0 Then
                        OffsetY = -Y
                    ElseIf Y + OffsetY >= m_Height - 1 Then
                        OffsetY = m_Height - Y - 1
                    End If
                    dispPixel(X + Y * m_Width) = OldPixel(X + OffsetX + (Y + OffsetY) * m_Width)

                    pos = Y * m_Width + X
                    wR = (dispPixel(pos) And &HFF0000) >> 16
                    wG = (dispPixel(pos) And &HFF00) >> 8
                    wB = dispPixel(pos) And &HFF
                    'pixelColorInteger = dispPixel(Y * m_Width + X)
                    'pixelColor = Color.FromArgb(pixelColorInteger)
                    pixelColor = Color.FromArgb(wR, wG, wB)
                    myBitmap.SetPixel(X, Y, pixelColor)
                End If
            Next
        Next
        CurrentHeightBuffer = NewHeightBuffer

        'For i As Integer = 0 To m_Height - 1
        '    For j As Integer = 0 To m_Width - 1
        '    Next
        'Next

        'SetDIBitsToDevice(Me.hdc, 0, 0, m_Width, m_Height, 0, 0, 0, m_Height, pPixel, BmpInfo, DIB_RGB_COLORS)
        Me.Image.Image = myBitmap

        Me.Text = "water drop, frame delay: " + CStr((GetTickCount - TimeUse))
    End Sub


    Private Sub CreateWaterDrops()
        Dim I As Long
        Dim DropX As Long
        Dim DropY As Long
        Dim DropRadius As Long
        Dim Height As Long
        Dim Percent As Long
        Percent = 0.0015 * (m_Width + m_Height)
        For I = 0 To 99
            DropX = Rnd() * m_Width
            DropY = Rnd() * m_Height
            Height = Rnd() * 400
            DropRadius = Rnd() * 4 * Percent
            If DropRadius < 4 Then DropRadius = 4
            Drops(I).X = DropX
            Drops(I).Y = DropY
            Drops(I).Height = Height
            Drops(I).Radius = DropRadius
        Next
    End Sub

    Private Sub Timer1_Timer() Handles Timer1.Tick
        Dim I As Long
        Dim Percent As Long
        Dim DropsNumber As Long
        Dim Index As Long
        Percent = 0.005 * (m_Width + m_Height)
        DropsNumber = Rnd() * Percent
        For I = 0 To DropsNumber - 1
            Index = Rnd() * 99
            DropWater(Drops(Index).X, Drops(Index).Y, Drops(Index).Radius, Drops(Index).Height)
        Next
    End Sub

    Private Sub Timer2_Timer() Handles Timer2.Tick
        PaintWater()
    End Sub

    Private Sub Form1_Shown(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Shown
        'Me.Text = "water drop:"
        'hdc = GetDC(FindWindow(Nothing, "water drop"))
        hdc = Me.Image.CreateGraphics().GetHdc()

        Dim pHbitmap As Long
        Dim pOldHbitmap As Long
        Dim pOldPixel As Long
        Dim pPixel As Long
        Dim hmemDC As Long
        Dim iRet As Long = -1

        pOldPixel = System.Runtime.InteropServices.Marshal.UnsafeAddrOfPinnedArrayElement(OldPixel, 0)
        pPixel = System.Runtime.InteropServices.Marshal.UnsafeAddrOfPinnedArrayElement(dispPixel, 0)

        hmemDC = CreateCompatibleDC(hdc)
        pHbitmap = CreateCompatibleBitmap(hdc, m_Width, m_Height)
        pOldHbitmap = SelectObject(hmemDC, pHbitmap)
        pHbitmap = SelectObject(hdc, pOldHbitmap)
        BitBlt(hmemDC, 0, 0, m_Width, m_Height, hdc, 0, 0, &HCC0020)

        For i As Integer = 0 To m_Height - 1
            For j As Integer = 0 To m_Width - 1
                OldPixel(i * m_Width + j) = myBitmap.GetPixel(j, i).ToArgb And &HFFFFFFFF
                dispPixel(i * m_Width + j) = myBitmap.GetPixel(j, i).ToArgb And &HFFFFFFFF
            Next
        Next

        'Dim xxx As Long
        'xxx = myBitmap.GetHbitmap
        'iRet = GetDIBits(hmemDC, xxx, 0, m_Height, pOldPixel, BmpInfo, DIB_RGB_COLORS)
        'iRet = GetDIBits(hmemDC, xxx, 0, m_Height, pPixel, BmpInfo, DIB_RGB_COLORS)

        Randomize()
        CreateWaterDrops()
    End Sub

End Class

'
'  Module1.vb
'
' divilis # qq . com
'

Module Module1
    Structure POINTAPI
        Public X As Long
        Public Y As Long
    End Structure

    Public Declare Function GetTickCount Lib "kernel32" () As Long

    Structure RGBQUAD                '只有bibitcount为1，2，4时才有调色板
        Public Blue As Byte                     '蓝色分量
        Public Green As Byte                    '绿色分量
        Public Red As Byte                      '红色分量
        Public Reserved As Byte                 '保留值
    End Structure

    Structure BITMAPINFOHEADER       '40 bytes
        Public biSize As Long                   'BITMAPINFOHEADER结构的大小
        Public biWidth As Long
        Public biHeight As Long
        Public biPlanes As Integer              '设备的为平面数，现在都是1
        Public biBitCount As Integer            '图像的颜色位图
        Public biCompression As Long            '压缩方式
        Public biSizeImage As Long              '实际的位图数据所占字节
        Public biXPelsPerMeter As Long          '目标设备的水平分辨率
        Public biYPelsPerMeter As Long          '目标设备的垂直分辨率
        Public biClrUsed As Long                '使用的颜色数
        Public biClrImportant As Long           '重要的颜色数。如果该项为0，表示所有颜色都是重要的
    End Structure

    Structure BITMAPINFO
        Public bmiHeader As BITMAPINFOHEADER
        Public bmiColors As RGBQUAD
    End Structure

    Structure RECT
        Public Left As Long
        Public Top As Long
        Public Right As Long
        Public Bottom As Long
    End Structure
    '

    Structure DropData
        Public X As Long
        Public Y As Long
        Public Radius As Long
        Public Height As Long
    End Structure

    Public Declare Function GetDIBits Lib "gdi32" (ByVal aHDC As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, ByVal lpBits As Long, ByVal lpBI As BITMAPINFO, ByVal wUsage As Long) As Long
    Public Declare Function SetDIBitsToDevice Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long, ByVal dx As Long, ByVal dy As Long, ByVal SrcX As Long, ByVal SrcY As Long, ByVal Scan As Long, ByVal NumScans As Long, ByVal Bits As Long, ByVal BitsInfo As BITMAPINFO, ByVal wUsage As Long) As Long
    Public Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
    Public Declare Function SetDIBits Lib "gdi32" (ByVal hdc As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, ByVal lpBits As Long, ByVal lpBI As BITMAPINFO, ByVal wUsage As Long) As Long
    Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (ByVal Destination As System.IntPtr, ByVal Source As System.IntPtr, ByVal Length As Long)
    Declare Function GetLastError Lib "kernel32" Alias "GetLastError" () As Long

    Public Const DIB_RGB_COLORS = 0&
    Public Const BI_RGB = 0&

    Public Const PI As Double = 3.1415926



    Public m_Width As Long
    Public m_Height As Long
    Public OldPixel() As Long
    Public dispPixel() As Long
    Public WaveHeight() As Long
    Public CurrentHeightBuffer As Long
    Public NewHeightBuffer As Long
    Public Drops(99) As DropData
    Public DoubleHeight As Long
    Public BmpInfo As BITMAPINFO

    Declare Function GetDC Lib "user32" Alias "GetDC" (ByVal hwnd As Long) As Long
    Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
    Declare Function MoveToEx Lib "gdi32" Alias "MoveToEx" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal lpPoint As POINTAPI) As Long
    Declare Function LineTo Lib "gdi32" Alias "LineTo" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long) As Long
    Declare Function SelectObject Lib "gdi32" Alias "SelectObject" (ByVal hdc As Long, ByVal hObject As Long) As Long
    Declare Function CreateCompatibleBitmap Lib "gdi32" Alias "CreateCompatibleBitmap" (ByVal hdc As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
    Declare Function CreateCompatibleDC Lib "gdi32" Alias "CreateCompatibleDC" (ByVal hdc As Long) As Long
    Declare Function BitBlt Lib "gdi32" Alias "BitBlt" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long

    'Declare Function WNetConnectionDialog Lib "mpr.dll" Alias "WNetConnectionDialog" (ByVal hwnd As Long, ByVal dwType As Long) As Long

End Module

附上原代码:

VERSION 5.00
Begin VB.Form FrmWater 
   BackColor       =   &H00C0FFC0&
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "水波"
   ClientHeight    =   6030
   ClientLeft      =   45
   ClientTop       =   435
   ClientWidth     =   8070
   FillColor       =   &H00FFFFFF&
   BeginProperty Font 
      Name            =   "宋体"
      Size            =   12
      Charset         =   134
      Weight          =   400
      Underline       =   0   'False
      Italic          =   0   'False
      Strikethrough   =   0   'False
   EndProperty
   Icon            =   "FrmWater.frx":0000
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   Picture         =   "FrmWater.frx":08CA
   ScaleHeight     =   402
   ScaleMode       =   3  'Pixel
   ScaleWidth      =   538
   ShowInTaskbar   =   0   'False
   StartUpPosition =   2  '屏幕中心
   Begin VB.Timer Timer2 
      Interval        =   50
      Left            =   2760
      Top             =   3000
   End
   Begin VB.Timer Timer1 
      Interval        =   45
      Left            =   2160
      Top             =   3000
   End
End
Attribute VB_Name = "FrmWater"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Private Type POINTAPI
    X As Long
    Y As Long
End Type

Private Declare Function GetTickCount Lib "kernel32" () As Long

Private Type RGBQUAD                '只有bibitcount为1，2，4时才有调色板
   Blue As Byte                     '蓝色分量
   Green As Byte                    '绿色分量
   Red As Byte                      '红色分量
   Reserved As Byte                 '保留值
End Type

Private Type BITMAPINFOHEADER       '40 bytes
   biSize As Long                   'BITMAPINFOHEADER结构的大小
   biWidth As Long
   biHeight As Long
   biPlanes As Integer              '设备的为平面数，现在都是1
   biBitCount As Integer            '图像的颜色位图
   biCompression As Long            '压缩方式
   biSizeImage As Long              '实际的位图数据所占字节
   biXPelsPerMeter As Long          '目标设备的水平分辨率
   biYPelsPerMeter As Long          '目标设备的垂直分辨率
   biClrUsed As Long                '使用的颜色数
   biClrImportant As Long           '重要的颜色数。如果该项为0，表示所有颜色都是重要的
End Type

Private Type BITMAPINFO
  bmiHeader As BITMAPINFOHEADER
  bmiColors As RGBQUAD
End Type

Private Type RECT
    Left As Long
    Top As Long
    Right As Long
    Bottom As Long
End Type
'

Private Type DropData
    X       As Long
    Y       As Long
    Radius  As Long
    Height  As Long
End Type

Private Declare Function GetDIBits Lib "gdi32" (ByVal aHDC As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, lpBits As Any, lpBI As BITMAPINFO, ByVal wUsage As Long) As Long
Private Declare Function SetDIBitsToDevice Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long, ByVal dx As Long, ByVal dy As Long, ByVal SrcX As Long, ByVal SrcY As Long, ByVal Scan As Long, ByVal NumScans As Long, Bits As Any, BitsInfo As BITMAPINFO, ByVal wUsage As Long) As Long
Private Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
Private Declare Function SetDIBits Lib "gdi32" (ByVal hdc As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, lpBits As Any, lpBI As BITMAPINFO, ByVal wUsage As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)






Private Const DIB_RGB_COLORS = 0&
Private Const BI_RGB = 0&

Private Const PI                As Double = 3.1415926



Private m_Width                 As Long
Private m_Height                As Long
Private OldPixel()              As Long
Private Pixel()                 As Long
Private WaveHeight()            As Long
Private CurrentHeightBuffer     As Long
Private NewHeightBuffer         As Long
Private Drops(99)               As DropData
Private DoubleHeight            As Long
Private BmpInfo                 As BITMAPINFO


'************************VB版本云效果***********************
'**作者：      laviewpbt
'**QQ:         33184777
'***********************************************************




Private Sub Form_DblClick()
    Unload Me
End Sub


Private Sub Form_Load()
    m_Width = Me.ScaleWidth
    m_Height = Me.ScaleHeight
    DoubleHeight = m_Height * 2
    
    With BmpInfo.bmiHeader
        .biSize = Len(BmpInfo.bmiHeader)
        .biWidth = m_Width
        .biHeight = m_Height
        .biPlanes = 1
        .biBitCount = 32
        .biCompression = BI_RGB
    End With
    
    ReDim OldPixel(m_Width * m_Height - 1) As Long
    ReDim Pixel(m_Width * m_Height - 1) As Long
    ReDim WaveHeight(m_Width * m_Height * 2 - 1) As Long

    GetDIBits Me.hdc, Me.Image.Handle, 0, m_Height, OldPixel(0), BmpInfo, DIB_RGB_COLORS
    GetDIBits Me.hdc, Me.Image.Handle, 0, m_Height, Pixel(0), BmpInfo, DIB_RGB_COLORS
    
    Randomize

    CreateWaterDrops
    
End Sub
  
 
  
Private Sub DropWater(X As Long, Y As Long, Radius As Long, Height As Long)
    Dim Distance        As Long
    Dim XX              As Long
    Dim YY              As Long
    Dim I               As Long
    Dim J               As Long
    Dim Ratio           As Double
    Ratio = PI / Radius
    For I = -Radius To Radius
        For J = -Radius To Radius
            XX = X + I
            YY = Y + J
            If XX >= 0 And XX < m_Width And YY >= 0 And YY < m_Height Then
                Distance = Sqr(I * I + J * J)
                If Distance <= Radius Then
                    WaveHeight(XX * m_Height * 2 + YY * 2 + CurrentHeightBuffer) = Height * Cos(Distance * Ratio)
                End If
            End If
        Next
    Next
End Sub
        
'************************VB版本水波效果***********************
'**作者：      laviewpbt
'**QQ:         33184777
'***********************************************************
 Private Sub PaintWater()
    
    Dim TimeUse         As Long
 
    Dim OffsetX         As Long
    Dim OffsetY         As Long
    Dim X               As Long
    Dim Y               As Long
    Dim Speed           As Long
    Dim Fast            As Long
    
    TimeUse = GetTickCount
    NewHeightBuffer = (CurrentHeightBuffer + 1) Mod 2
   
    CopyMemory Pixel(0), OldPixel(0), m_Width * m_Height * 4
    
    For X = 1 To m_Width - 2
        For Y = 1 To m_Height - 2
            Speed = X * DoubleHeight + Y * 2 + NewHeightBuffer
            Fast = X * DoubleHeight + Y * 2 + CurrentHeightBuffer
            WaveHeight(Speed) = _
            (WaveHeight(Fast - DoubleHeight) + _
            WaveHeight(Fast - DoubleHeight - 2) + _
            WaveHeight(Fast - 2) + _
            WaveHeight(Fast + DoubleHeight - 2) + _
            WaveHeight(Fast + DoubleHeight) + _
            WaveHeight(Fast + DoubleHeight + 2) + _
            WaveHeight(Fast + 2) + _
            WaveHeight(Fast - DoubleHeight + 2)) \ 4 - _
            WaveHeight(Speed)

            WaveHeight(Speed) = WaveHeight(Speed) - WaveHeight(Speed) \ 32
            OffsetX = (WaveHeight(Speed - DoubleHeight) - WaveHeight(Speed + DoubleHeight)) \ 16
            OffsetY = (WaveHeight(Speed - 2) - WaveHeight(Speed + 2)) \ 16
            If OffsetX <> 0 And OffsetY <> 0 Then
                If X + OffsetX <= 0 Then
                    OffsetX = -X
                ElseIf X + OffsetX >= m_Width - 1 Then
                    OffsetX = m_Width - X - 1
                End If
                If Y + OffsetY <= 0 Then
                    OffsetY = -Y
                ElseIf Y + OffsetY >= m_Height - 1 Then
                    OffsetY = m_Height - Y - 1
                End If
                Pixel(X + Y * m_Width) = OldPixel(X + OffsetX + (Y + OffsetY) * m_Width)
            End If
        Next
    Next
    CurrentHeightBuffer = NewHeightBuffer
  
    SetDIBitsToDevice Me.hdc, 0, 0, m_Width, m_Height, 0, 0, 0, m_Height, Pixel(0), BmpInfo, DIB_RGB_COLORS
 
    Me.Caption = GetTickCount - TimeUse
End Sub


Private Sub CreateWaterDrops()
    Dim I               As Long
    Dim DropX           As Long
    Dim DropY           As Long
    Dim DropRadius      As Long
    Dim Height          As Long
    Dim Percent         As Long
    Percent = 0.0015 * (m_Width + m_Height)
    For I = 0 To 99
        DropX = Rnd * m_Width
        DropY = Rnd * m_Height
        Height = Rnd * 400
        DropRadius = Rnd * 4 * Percent
        If DropRadius < 4 Then DropRadius = 4
        Drops(I).X = DropX
        Drops(I).Y = DropY
        Drops(I).Height = Height
        Drops(I).Radius = DropRadius
    Next
End Sub
        
Private Sub Timer1_Timer()
    Dim I               As Long
    Dim Percent         As Long
    Dim DropsNumber     As Long
    Dim Index           As Long
    Percent = 0.005 * (m_Width + m_Height)
    DropsNumber = Rnd * Percent
    For I = 0 To DropsNumber - 1
        Index = Rnd * 99
        DropWater Drops(Index).X, Drops(Index).Y, Drops(Index).Radius, Drops(Index).Height
    Next
End Sub

Private Sub Timer2_Timer()
    PaintWater
End Sub