cyuyandonghua.txt

一个小小小的C语言小动画程序 如果感兴趣的话

#include<windows.h>
#include<time.h>
#include<stdlib.h>

const SnowNumber=500; //雪点数量

struct SnowNode
{
POINT postion;  //雪点位置
int   iColor; //先前的颜色
int   iSpeed; //下落速度 
int   iMove; //下落距离
int   iStick; //粘贴度
};

SnowNode SnowNodes[SnowNumber]; //雪点数组
int   hTimer=0;
int   CrWind=0;
int   CrStep=0; //当前循环步数(用于限速)
int   ScreenWidth=0;  //屏幕宽度
int   ScreenHeight=0;  //屏幕高度

void GetScreenSize();
void CALLBACK TimerProc(HANDLE hWnd,UINT uMsg,UINT idEvent,DWORD dwTime);
void InitSnowNodes();
void MoveSnowNodes();

int WINAPI  WinMain(HINSTANCE hInstance,
       HINSTANCE hPrevInstance,
       LPSTR  lpCmdLine,
       int   nCmdShow
       )
{


MSG msg; //标准windows消息 
LARGE_INTEGER Frequency; //高性能定时器频率
LARGE_INTEGER StartCt,EndCt;//高性能定时器计数
int ElapsedTime;      //时间间隔
srand((unsigned)time(NULL));
GetScreenSize();
InitSnowNodes();
QueryPerformanceFrequency(&Frequency);
hTimer=SetTimer(0,0,rand()%5*500,(TIMERPROC)TimerProc);
if(hTimer==0)
{
  MessageBox(0,TEXT("创建定时器失败"),TEXT("提示"),MB_OK|MB_ICONINFORMATION);
  return -1;
}
RegisterHotKey(0,0,MOD_CONTROL,(int)'L');
while(1)
{
  QueryPerformanceCounter(&StartCt); //执行运算前计数值
  if(PeekMessage(&msg,0,0,0,1))
  {
   switch(msg.message)
   {
    case WM_TIMER: TimerProc(0,0,0,0);
        break; //预设风向改变时间已到
    case WM_HOTKEY: KillTimer(0,hTimer);//删除随机风向定时 器
        UnregisterHotKey(0,0);//删除退出热键
        InvalidateRect(0,NULL,true);
        exit(1);
        break;
    case WM_DISPLAYCHANGE:
        GetScreenSize(); //重新取屏幕的尺寸
        InitSnowNodes(); //初始化雪点的数组
        break;
   }

  }
  MoveSnowNodes();
  QueryPerformanceCounter(&EndCt);//执行运算后的计数值
  ElapsedTime=(EndCt.QuadPart-StartCt.QuadPart)/Frequency.QuadPart;
  if((ElapsedTime<0.0005))
   Sleep(2); //简单限速
  else if(ElapsedTime<0.0010)
    Sleep(1);
    else if(ElapsedTime<0.0015)
     Sleep(3);

}
//MessageBox(0,TEXT("消息"),TEXT("消息"),MB_OK|MB_ICONINFORMATION);
return 0;
}
void GetScreenSize()
{
ScreenWidth=GetSystemMetrics(SM_CXSCREEN);
ScreenHeight=GetSystemMetrics(SM_CYSCREEN);
return ;
}

void CALLBACK TimerProc(HANDLE hWnd,UINT uMsg,UINT idEvent,DWORD dwTime)
{
// MessageBox(0,TEXT("消息"),TEXT("消息"),MB_OK|MB_ICONINFORMATION);
srand((unsigned)time(NULL));
if(hTimer==0)
{
  MessageBox(0,TEXT("创建定时器失败"),TEXT("提示"),MB_OK|MB_ICONINFORMATION);
  return ;
}
SetTimer(0,hTimer,((rand()%27+4)*500),(TIMERPROC)TimerProc); //// 重设下次风向改变时间
//修改风向
if(CrWind!=0)
  CrWind=0;
else
     CrWind=rand()%3-1;
return ;
}

void InitSnowNodes()
{
HDC hScreenDC=0;
int j=0;
hScreenDC=CreateDC("DISPLAY",NULL,NULL,NULL);
  if(hScreenDC==NULL)
{
  MessageBox(0,"获取屏幕DC失败!","信息",MB_OK|MB_ICONERROR);
  return ;
}
srand((unsigned)time(NULL));
for(j=0;j<SnowNumber;j++)
{
  SnowNodes[j].postion.x=rand()%ScreenWidth;
  SnowNodes[j].postion.y=rand()%ScreenHeight;
  SnowNodes[j].iColor=GetPixel(hScreenDC,SnowNodes[j].postion.x,SnowNodes[j].postion.y);
  SnowNodes[j].iSpeed=(rand()%5+1);       //每次下落距离（1-5）
  SnowNodes[j].iStick=(30-rand()%SnowNodes[j].iSpeed); //粘贴度（几次循环作一次粘贴连判断
  
}
DeleteDC(hScreenDC);
}

void MoveSnowNodes()
{
// MessageBox(0,TEXT("消息"),TEXT("消息"),MB_OK|MB_ICONINFORMATION);
HDC hScreenDC=0;
srand((unsigned)time(NULL));
int x=0,y=0,i=0;
hScreenDC=CreateDC("DISPLAY",NULL,NULL,NULL);
if(hScreenDC==NULL)
{
  MessageBox(0,"获取屏幕DC失败!","信息",MB_OK|MB_ICONERROR);
  return ;
}
TextOut(hScreenDC,0,0,"虽然大检查顺顺藤摸瓜克格勃呀加",0);
for(i=0;i<SnowNumber;i++)
{
  //控制雪点下降速度
  if((CrStep%SnowNodes[i].iSpeed)!=0)
   continue;
  //恢复上次被覆盖点
  if((GetPixel(hScreenDC,SnowNodes[i].postion.x,SnowNodes[i].postion.y))==0XFFFFFF)
   SetPixel(hScreenDC,SnowNodes[i].postion.x,SnowNodes[i].postion.y,SnowNodes[i].iColor);
  //根据几向作随机飘落
  x=SnowNodes[i].postion.x+rand()%3+CrWind;
  y=SnowNodes[i].postion.y+SnowNodes[i].iMove;

  //积雪（停留）效果处理
  if(  ( (CrStep%SnowNodes[i].iStick)==0)
     &&( (GetPixel(hScreenDC,x,y))!=(GetPixel(hScreenDC,x,y+1)))
     &&( (GetPixel(hScreenDC,x-1,y))!=(GetPixel(hScreenDC,x-1,y+1)))
     &&( (GetPixel(hScreenDC,x+1,y))!=GetPixel(hScreenDC,x+1,y+1))
     )
  {
   //稍稍调整坐标
   if(GetPixel(hScreenDC,x,y-1)==GetPixel(hScreenDC,x,y-2))
   {
    y--;
   }
   else
   {
       if(GetPixel(hScreenDC,x,y-1)==GetPixel(hScreenDC,x,y-2))
     y++;
    x+=CrWind;
   }
   //画三个雪花点
   SetPixel(hScreenDC,x,y,0XFFFFFF);
   SetPixel(hScreenDC,x+1,y+1,0XFFFFFF);
   SetPixel(hScreenDC,x-1,y-1,0XFFFFFF);
   //重生雪点
   SnowNodes[i].postion.x=rand()%ScreenWidth;
   SnowNodes[i].postion.y=rand()%10;
   SnowNodes[i].iColor=GetPixel(hScreenDC,SnowNodes[i].postion.x,SnowNodes[i].postion.y);
   
  }
  else
  {
   if( (x<0) || (x>ScreenWidth) || (y>ScreenHeight))
   {
    SnowNodes[i].postion.x=rand()%10;
    SnowNodes[i].postion.y=rand()%ScreenWidth;
    SnowNodes[i].iColor=GetPixel(hScreenDC,SnowNodes[i].postion.x,SnowNodes[i].postion.y);

   }
   else
   {
    //保存颜色并绘制雪点
    SnowNodes[i].iColor=GetPixel(hScreenDC,x,y);
    SetPixel(hScreenDC,x,y,0XFFFFFF);
    //此时保存新雪点位置
    SnowNodes[i].postion.x=x;
    SnowNodes[i].postion.y=y;
   }
  }
  DeleteDC(hScreenDC);
  CrStep++;
}
}