VC 圣诞下雪源代码

系统教程610 更新时间：2024-07-04 20:14:00

2024年3月21日发(作者：)

VC

///.h

#pragma once

class HSnow

{

public:

HSnow(void);

~HSnow(void);

void Snow();

public:

struct HSnw{

int prex;

int prey;

int x;

int y;

COLORREF clr;

COLORREF preclr;

int stepx;

int stepy;

};

void Init(void) ;

private:

int nMaxSnow;

HSnw* snow;

int maxW; //screen width

int maxH; //screen height

};

//// dllmain

#include "stdafx.h"

BOOL APIENTRY DllMain( HMODULE hModule,

DWORD ul_reason_for_call,

LPVOID lpReserved

)

{

switch (ul_reason_for_call)

{

case DLL_PROCESS_ATTACH:

srand( UINT(0) ); break;

case DLL_THREAD_ATTACH:

case DLL_THREAD_DETACH:

case DLL_PROCESS_DETACH:

break;

}

return TRUE;

}

//////.cpp

#include "StdAfx.h"

#include "HSnow.h"

HSnow::HSnow(void)

{

snow = NULL;

nMaxSnow = 500;

}

HSnow::~HSnow(void)

{

if( snow ){

delete [] snow;

}

void HSnow::Init()

{

if( nMaxSnow <= 0 ) { return ;}

if( snow ) { delete [] snow; snow = NULL;}

snow = new HSnw[nMaxSnow];

HDC dc = GetDC(0);

maxW = ::GetSystemMetrics( SM_CXSCREEN );

maxH = ::GetSystemMetrics( SM_CYSCREEN );

for( int i = 0; i < nMaxSnow; i++ ){

snow[i].x = snow[i].prex = rand() % maxW;

snow[i].y = snow[i].prey = rand() % maxH;

snow[i].preclr = snow[i].clr = ::GetPixel( dc,snow[i].x,snow[i].y );

snow[i].stepx = (rand()%2==1)?1:-1;

snow[i].stepy = (rand() % 5)+1;

}

::ReleaseDC(0,dc);

}

void HSnow::Snow(void)

{

if( nMaxSnow <= 0 ){ return; }

HDC dc = GetDC(0);

while( true )

{

if(GetAsyncKeyState(VK_CONTROL) && GetAsyncKeyState(VK_F12 ))

{

break; ////按CTRL+F12 结束

}

for( int i = 0; i

{

SetPixel( dc, snow[i].prex,snow[i].prey, snow[i].preclr );

snow[i].prex = snow[i].x ;

snow[i].prey = snow[i].y ;

snow[i].preclr = snow[i].clr ;

snow[i].x += snow[i].stepx ;

snow[i].y += snow[i].stepy ;

if( snow[i].x < 0 ) { snow[i].x = maxW ; }

if( snow[i].x >maxW){ snow[i].x = 0 ; }

if( snow[i].y < 0 ) { snow[i].y = maxH ; }

if( snow[i].y >maxH){ snow[i].y = 0 ; }

snow[i].clr = GetPixel( dc, snow[i].x, snow[i].y ) ;

if( 0xffffff - snow[i].clr < 5000 ){ continue; } ///和白色相近就忽略

SetPixel( dc, snow[i].x, snow[i].y , 0xffffff ); ////设置雪点

if( rand()%4 != 1 ){ continue; }

////设置积雪点

int sx = snow[i].x + rand()%3;

int sy = snow[i].y + rand()%3;

if( sx>maxW || sx<0 || sy>maxH || sy<0 ){ continue; }

COLORREF sClr = GetPixel(dc,sx,sy);

if( abs(0xffffff-sClr)<5000 || abs( snow[i].clr - sClr ) > 600000 ) //如果颜色相

差太大就设置积雪点

{

SetPixel(dc,sx,sy,0xffffff);

}

Sleep(1);

}

::ReleaseDC(0,dc);

::InvalidateRect(0,0,1);

}

void DRun(void)

{

HSnow snow;

();

}

///.def

EXPORTS

DRun

C#

//新作一个，看看是否满足要求，可以修改下雪速度，大小等

public partial class Form1 : Form

{

private Random clsRandom = new Random();

private int[,] SnowParry = new int[1024,3];

private int SnowNum = 0;

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

SnowNum = (1024);

int px = (1024);

int py = (768);

Buffered = true;

for (int i = 0; i < SnowNum; i++)

{

SnowParry[i, 0] = px;

SnowParry[i, 1] = py;

SnowParry[i, 2] = (40);

px = (1024);

py = (768);

}

private void timer1_Tick(object sender, EventArgs e)

{

for (int i = 0; i < SnowNum; i++)

{

if (SnowParry[i, 1] > 768)

{

SnowParry[i, 1] = 0;

}

SnowParry[i, 1] += SnowParry[i, 2];

}

date();

}

private void panel1_Paint(object sender, PaintEventArgs e)

{

Graphics MyPaint = cs;

Bitmap bm=new Bitmap(5,5); //这里调整点的大小

el(0, 0, ); //设置点的颜色

el(0, 1, );

el(1, 0, );

el(1, 1, );

();

for (int i = 0; i < SnowNum; i++)

{

ageUnscaled(bm, SnowParry[i, 0], SnowParry[i, 1]);

}

VB /laiba/CommMsgs?cmm=1323&tid=2790103

Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long 'GetDC()功能是

获取指定窗体的设备场景的句柄(hDC),用参数0则可以获取整个屏幕的场景句柄 Private

Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long)

As Long 'GetPixel用于取得场景(这里是整个屏幕)中某点的颜色值 Private Declare Function

SetPixel Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal crColor As

Long) As Long 'SetPixel用于设置场景(这里是整个屏幕)中某点的颜色值 Private Declare

Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long) As Long '释放由

GetDC()获取的设备场景句柄，否则可能造成系统锁死 Private Declare Function

InvalidateRect& Lib "user32" (ByVal hwnd As Long, lpRect As RECT, ByVal bErase As Long) '

清理窗口雪花 Private Type POINTAPI '定义坐标点结构 x As Long y As Long End Type

Private Type RECT '定义“区域”数据结构，但实际上并没有用到，因为仅需在函数

InvalidateRect中传递一个空的RECT参数 left As Long top As Long right As Long

bottom As Long End Type Dim rect1 As RECT Private Const ScrnWidth = 1024 '屏幕宽度(单位:

像素) Private Const ScrnHight = 768 '屏幕高度(单位:像素) Private Const SnowCol =

&HFEFFFE '雪花颜色 Private Const SnowColDown = &HFFFFFF '积雪颜色 Private Const

SnowColDuck = &HFFDDDD '深色积雪颜色 Private Const SnowNum = 500 '同一时间飘动的

雪花数量 Dim hDC1 As Long '存储桌面窗口设备句柄 Dim pData(SnowNum) As POINTAPI '

存储每个雪花的位置信息 Dim pColor(SnowNum) As Long '存储画出雪花前屏幕原来的颜色

Dim Vx As Integer '雪花总体水平飘行速度 Dim Vy As Integer '雪花总体垂直下落速度 Dim

PVx As Integer '单个雪花实际水平飘行速度 Dim PVy As Integer '单个雪花实际垂直飘行速

度 '初始化雪花位置 Private Sub InitP(i As Integer) pData(i).x = Rnd() * ScrnWidth pData(i).y =

Rnd() * 2 pColor(i) = GetPixel(hDC1, pData(i).x, pData(i).y) '取得屏幕原来的颜色值 End Sub '

取得某一点与周围点的对比度，确定是否在此位置堆积雪花 Private Function GetContrast(i

As Integer) As Long Dim ColorCmp As Long '存储用作对比的点的颜色值 Dim tempR As

Long '存储CorlorCmp的红色部分，下同 Dim tempG As Long Dim tempB As Long Dim Slope

As Integer '存储雪花飘落方向:Vx/Vy '计算雪花飘落方向 If PVy <> 0 Then Slope = PVx /

PVy Else Slope = 2 End If '根据雪花飘落方向决定取哪一点作对比点， '若PVx/PVy在-1到

1之间，即Slope=0，就取正下面的象素点 '若PVx/PVy>1，取右下方的点，PVx/PVy<-1则

取左下方 If Slope = 0 Then ColorCmp = GetPixel(hDC1, pData(i).x, pData(i).y + 1) Else If

Slope > 1 Then ColorCmp = GetPixel(hDC1, pData(i).x + 1, pData(i).y + 1) Else ColorCmp

= GetPixel(hDC1, pData(i).x - 1, pData(i).y + 1) End If End If '确定当前位置没有与另一个雪

花重叠，否则返回0，用于防止由于不同雪花重叠造成雪花乱堆 If ColorCmp = SnowCol Then

GetContrast = 0 Exit Function End If '分别获取ColorCmp与对比点的蓝、绿、红部分的差值

tempB = Abs((ColorCmp And &HFF0000) - (pColor(i) And &HFF0000)) / &H10000 tempG =

Abs((ColorCmp And &HFF00&) - (pColor(i) And &HFF00&)) / &H100& tempR =

Abs((ColorCmp And &HFF&) - (pColor(i) And &HFF&)) '返回对比度值 GetContrast = (tempR

+ tempG + tempB) / 3 End Function '画出一帧，即重画所有雪花位置一次 Private Sub DrawP()

Dim i As Integer For i = 0 To SnowNum '防止雪花重叠造成干扰 If pColor(i) <> SnowCol

Then '还原上一个位置的颜色 SetPixel hDC1, pData(i).x, pData(i).y, pColor(i) End If '

设置新的位置，i Mod 3用于将雪花分为三类采用不同速度，以便形成层次感 PVx = Rnd()

* 2 - 1 + Vx * (i Mod 3) PVy = Vy * (i Mod 3 + 1) pData(i).x = pData(i).x + PVx pData(i).y

= pData(i).y + PVy '取得新位置原始颜色值，用于下一步雪花飘过时恢复此处颜色

pColor(i) = GetPixel(hDC1, pData(i).x, pData(i).y) '如果获取颜色失败，表明雪花已飘出屏

幕，重新初始化 If pColor(i) = -1 Then InitP i Else '否则若雪花没有重叠 If pColor(i)

<> SnowCol Then '若对比度较小(即不能堆积),就画出雪花 'Rnd()>0.3用于防止某些连续

而明显的边界截获所有雪花 If Rnd() > 0.3 Or GetContrast(i) < 50 Then SetPixel hDC1,

pData(i).x, pData(i).y, SnowCol '否则表明找到明显的边界，画出堆积的雪，并初始化以便画

新的雪花 Else SetPixel hDC1, pData(i).x, pData(i).y - 1, SnowColDuck SetPixel hDC1,

pData(i).x - 1, pData(i).y, SnowColDuck SetPixel hDC1, pData(i).x + 1, pData(i).y,

SnowColDown InitP i End If End If End If Next End Sub Private Sub Form_Load() Dim j

As Integer n = "桌面飘雪" '设置窗口标题 '设置计时器，Timer1用于画单帧，Timer2

用于风向变化 d = True al = 10 d = True

al = 2000 Randomize '初始化随机数种子 hDC1 = GetDC(0) '获取桌面窗口设备

场景句柄 '初始化整个屏幕 For j = 0 To SnowNum pData(j).x = Rnd() * ScrnWidth

pData(j).y = Rnd() * ScrnHight pColor(j) = GetPixel(hDC1, pData(j).x, pData(j).y) Next End

Sub Private Sub Form_Unload(Cancel As Integer) ReleaseDC 0, hDC1 '释放桌面窗口设备句柄

InvalidateRect 0, rect1, 0 '清除所有雪花，恢复桌面 End Sub Private Sub Timer1_Timer() DrawP

'画出一帧 End Sub Private Sub Timer2_Timer() '改变风向 Vx = Rnd() * 4 - 2 Vy = Rnd() + 2

End Sub '完，最后，需要两个Timer：Timer1、Timer2

VB

是exe格式的那种桌面下雪的小程序怎么制作

[此问题的推荐答案]

用vb编程，知道是什么吧，然后在里面输代码：

'源代码

Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long

'GetDC()功能是获取指定窗体的设备场景的句柄(hDC),用参数0则可以获取整个屏幕的场景句柄

Private Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y As

Long) As Long

'GetPixel用于取得场景(这里是整个屏幕)中某点的颜色值

Private Declare Function SetPixel Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y As

Long, ByVal crColor As Long) As Long

'SetPixel用于设置场景(这里是整个屏幕)中某点的颜色值

Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long) As

Long

'释放由GetDC()获取的设备场景句柄，否则可能造成系统锁死

Private Declare Function InvalidateRect& Lib "user32" (ByVal hwnd As Long, lpRect As RECT,

ByVal bErase As Long)

'清理窗口雪花

Private Type POINTAPI '定义坐标点结构

x As Long

y As Long

End Type

Private Type RECT '定义“区域”数据结构，但实际上并没有用到，因为仅需在函数InvalidateRect中传递一

个空的RECT参数

left As Long

top As Long

right As Long

bottom As Long

End Type

Dim rect1 As RECT

Private Const ScrnWidth = 1024 '屏幕宽度(单位:像素)

Private Const ScrnHight = 768 '屏幕高度(单位:像素)

Private Const SnowCol = &HFEFFFE '雪花颜色

Private Const SnowColDown = &HFFFFFF '积雪颜色

Private Const SnowColDuck = &HFFDDDD '深色积雪颜色

Private Const SnowNum = 500 '同一时间飘动的雪花数量

Dim hDC1 As Long '存储桌面窗口设备句柄

Dim pData(SnowNum) As POINTAPI '存储每个雪花的位置信息

Dim pColor(SnowNum) As Long '存储画出雪花前屏幕原来的颜色

Dim Vx As Integer '雪花总体水平飘行速度

Dim Vy As Integer '雪花总体垂直下落速度

Dim PVx As Integer '单个雪花实际水平飘行速度

Dim PVy As Integer '单个雪花实际垂直飘行速度

'初始化雪花位置

Private Sub InitP(i As Integer)

pData(i).x = Rnd() * ScrnWidth

pData(i).y = Rnd() * 2

pColor(i) = GetPixel(hDC1, pData(i).x, pData(i).y) '取得屏幕原来的颜色值

End Sub

'取得某一点与周围点的对比度，确定是否在此位置堆积雪花

Private Function GetContrast(i As Integer) As Long

Dim ColorCmp As Long '存储用作对比的点的颜色值

Dim tempR As Long '存储CorlorCmp的红色部分，下同

Dim tempG As Long

Dim tempB As Long

Dim Slope As Integer '存储雪花飘落方向:Vx/Vy

'计算雪花飘落方向

If PVy <> 0 Then

Slope = PVx / PVy

Else

Slope = 2

End If

'根据雪花飘落方向决定取哪一点作对比点，

'若PVx/PVy在-1到1之间，即Slope=0，就取正下面的象素点

'若PVx/PVy>1，取右下方的点，PVx/PVy<-1则取左下方

If Slope = 0 Then

ColorCmp = GetPixel(hDC1, pData(i).x, pData(i).y + 1)

Else

If Slope > 1 Then

ColorCmp = GetPixel(hDC1, pData(i).x + 1, pData(i).y + 1)

Else

ColorCmp = GetPixel(hDC1, pData(i).x - 1, pData(i).y + 1)

End If

'确定当前位置没有与另一个雪花重叠，否则返回0，用于防止由于不同雪花重叠造成雪花乱堆

If ColorCmp = SnowCol Then

GetContrast = 0

Exit Function

End If

'分别获取ColorCmp与对比点的蓝、绿、红部分的差值

tempB = Abs((ColorCmp And &HFF0000) - (pColor(i) And &HFF0000)) / &H10000

tempG = Abs((ColorCmp And &HFF00&) - (pColor(i) And &HFF00&)) / &H100&

tempR = Abs((ColorCmp And &HFF&) - (pColor(i) And &HFF&))

'返回对比度值

GetContrast = (tempR + tempG + tempB) / 3

End Function

'画出一帧，即重画所有雪花位置一次

Private Sub DrawP()

Dim i As Integer

For i = 0 To SnowNum

'防止雪花重叠造成干扰

If pColor(i) <> SnowCol Then

'还原上一个位置的颜色

SetPixel hDC1, pData(i).x, pData(i).y, pColor(i)

End If

'设置新的位置，i Mod 3用于将雪花分为三类采用不同速度，以便形成层次感

PVx = Rnd() * 2 - 1 + Vx * (i Mod 3)

PVy = Vy * (i Mod 3 + 1)

pData(i).x = pData(i).x + PVx

pData(i).y = pData(i).y + PVy

'取得新位置原始颜色值，用于下一步雪花飘过时恢复此处颜色

pColor(i) = GetPixel(hDC1, pData(i).x, pData(i).y)

'如果获取颜色失败，表明雪花已飘出屏幕，重新初始化

If pColor(i) = -1 Then

InitP i

Else

'否则若雪花没有重叠

If pColor(i) <> SnowCol Then

'若对比度较小(即不能堆积),就画出雪花

'Rnd()>0.3用于防止某些连续而明显的边界截获所有雪花

If Rnd() > 0.3 Or GetContrast(i) < 50 Then

SetPixel hDC1, pData(i).x, pData(i).y, SnowCol

'否则表明找到明显的边界，画出堆积的雪，并初始化以便画新的雪花

Else

SetPixel hDC1, pData(i).x, pData(i).y - 1, SnowColDuck

SetPixel hDC1, pData(i).x - 1, pData(i).y, SnowColDuck

SetPixel hDC1, pData(i).x + 1, pData(i).y, SnowColDown

InitP i

End If

Private Sub Form_Load()

Dim j As Integer

n = "桌面飘雪" '设置窗口标题

'设置计时器，Timer1用于画单帧，Timer2用于风向变化

d = True

al = 10

d = True

al = 2000

Randomize '初始化随机数种子

hDC1 = GetDC(0) '获取桌面窗口设备场景句柄

'初始化整个屏幕

For j = 0 To SnowNum

pData(j).x = Rnd() * ScrnWidth

pData(j).y = Rnd() * ScrnHight

pColor(j) = GetPixel(hDC1, pData(j).x, pData(j).y)

Private Sub Form_Unload(Cancel As Integer)

ReleaseDC 0, hDC1 '释放桌面窗口设备句柄

InvalidateRect 0, rect1, 0 '清除所有雪花，恢复桌面

End Sub

Private Sub Timer1_Timer()

DrawP '画出一帧

End Sub

Private Sub Timer2_Timer()

'改变风向

Vx = Rnd() * 4 - 2

Vy = Rnd() + 2

End Sub

'完，最后，需要两个Timer：Timer1、Timer2。

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VC 圣诞下雪源代码

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