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(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = (WNDPROC)WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = NULL;
wcex.hCursor = NULL;
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "maple";
wcex.hIconSm = NULL;
return RegisterClassEx(&wcex);
}
//****初始化函数*************************************
// 1.加载位图资源
// 2.取得内部窗口区域信息
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HBITMAP bmp;
hInst = hInstance;
hWnd = CreateWindow("maple", "浅墨的绘图窗口" , WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
if (!hWnd)
{
return FALSE;
}
MoveWindow(hWnd,10,10,600,450,true);
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
hdc = GetDC(hWnd);
mdc = CreateCompatibleDC(hdc);
bufdc = CreateCompatibleDC(hdc);
bmp = CreateCompatibleBitmap(hdc,640,480);
SelectObject(mdc,bmp);
bg = (HBITMAP)LoadImage(NULL,"bg.bmp",IMAGE_BITMAP,rect.right,rect.bottom,LR_LOADFROMFILE);
star = (HBITMAP)LoadImage(NULL,"star.bmp",IMAGE_BITMAP,30,30,LR_LOADFROMFILE);
mask = (HBITMAP)LoadImage(NULL,"mask.bmp",IMAGE_BITMAP,30,30,LR_LOADFROMFILE);
GetClientRect(hWnd,&rect);
SetTimer(hWnd,1,0,NULL);
MyPaint(hdc);
return TRUE;
}
//****自定义绘图函数*********************************
// 1.窗口贴图
// 2.实现星光绽放的效果
void MyPaint(HDC hdc)
{
//创建粒子
if(count == 0) //随机设置爆炸点
{
int x=rand()%rect.right;
int y=rand()%rect.bottom;
for(i=0;i<50;i++) //产生星光粒子
{
flystar[i].x = x;
flystar[i].y = y;
flystar[i].lasted = 0; //设定该粒子存在的时间为零
if(i%2==0) //按粒子编号i来决定粒子在哪个象限运动，且x，y方向的移动速度随机为1—15之间的一个值，由1+rand()%15来完成。
{
flystar[i].vx = -(1+rand()%15);
flystar[i].vy = -(1+rand()%15);
}
if(i%2==1)
{
flystar[i].vx = 1+rand()%15;
flystar[i].vy = 1+rand()%15;
}
if(i%4==2)
{
flystar[i].vx = -(1+rand()%15);
flystar[i].vy = 1+rand()%15;
}
if(i%4==3)
{
flystar[i].vx = 1+rand()%15;
flystar[i].vy = -(1+rand()%15);
}
flystar[i].exist = true; //设定粒子存在
}
count = 50; //50个粒子由for循环设置完成后，我们将粒子数量设为50，代表目前有50颗星光
}
//先在内存dc中贴上背景图片
SelectObject(bufdc,bg);
BitBlt(mdc,0,0,rect.right,rect.bottom,bufdc,0,0,SRCCOPY);
for(i=0;i<50;i++)
{
if(flystar[i].exist) //判断粒子是否还存在,若存在，则根据其坐标（flystar[i].x,flystar[i].y）进行贴图操作
{
SelectObject(bufdc,mask);
BitBlt(mdc,flystar[i].x,flystar[i].y,30,30,bufdc,0,0,SRCAND);
SelectObject(bufdc,star);
BitBlt(mdc,flystar[i].x,flystar[i].y,30,30,bufdc,0,0,SRCPAIN |