风车礼花——C++实现

/************************************************************* *文件名：WindCar.cpp *说明：本程序用转动的风车演示节日礼花的燃放效果 *最后一次修改时间：2009年10月29日 **************************************************************/ #include <windows.h> #include "resource.h" #include "WindCarClass.h" bool bStart = false; WindCar* arrWindCar[50] = {NULL}; int xPos = 0; //鼠标点击x位置 int yPos = 0; //鼠标点击y位置 int iTime = 0; //记录定时器启动后的周期数 int iWindCarNum = 0; //随即生成风车数量 int iWindCarLive = 0; //记录还健在的风车数量 HINSTANCE hIns; LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) { MSG uMsg; HWND hwnd; hIns = hInstance; WNDCLASS wndClass; wndClass.cbClsExtra = 0; wndClass.cbWndExtra = 0; wndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); wndClass.hCursor = NULL; wndClass.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_ICON1)); wndClass.hInstance = hInstance; wndClass.lpfnWndProc = WindowProc; wndClass.lpszClassName = "WindCar"; wndClass.lpszMenuName = NULL; wndClass.style = CS_HREDRAW | CS_VREDRAW; if(!RegisterClass(&wndClass)) { MessageBox(NULL, TEXT("RegisterClass Failed!"), TEXT("Error"), MB_OK); return 0; } /*创建窗口，其中定义窗口客户区大小为900*600*/ hwnd = CreateWindow(TEXT("WindCar"), TEXT("风车礼花"), WS_OVERLAPPEDWINDOW & ~WS_MAXIMIZEBOX & ~WS_SIZEBOX, 50, 30, 900 + GetSystemMetrics(SM_CXFIXEDFRAME) * 2, 600 + GetSystemMetrics(SM_CYFIXEDFRAME) + GetSystemMetrics(SM_CYCAPTION), NULL, NULL, hInstance,NULL); /*显示和更新窗口*/ ShowWindow(hwnd, nShowCmd); UpdateWindow(hwnd); /*消息循环*/ while (GetMessage(&uMsg, NULL, 0, 0)) { TranslateMessage(&uMsg); DispatchMessage(&uMsg); } return (int)uMsg.wParam; } LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { HDC hDC; PAINTSTRUCT ps; switch (uMsg) { case WM_CREATE: break; case WM_PAINT: hDC = BeginPaint(hwnd, &ps); if (bStart) { int i = 0; HBITMAP hBp = LoadBitmap(hIns, MAKEINTRESOURCE(IDB_BITMAP1)); //加载位图 HBITMAP hComBp = CreateCompatibleBitmap(hDC, 900, 600); //创建兼容位图 HDC hComDC = CreateCompatibleDC(hDC); //创建兼容DC，用以选进兼容位图 HDC hBpDC = CreateCompatibleDC(hDC); //创建兼容DC，用以选进位图 /*选进位图*/ SelectObject(hBpDC, hBp); SelectObject(hComDC, hComBp); BitBlt(hComDC, 0, 0, 900, 600, hBpDC, 0, 0, SRCCOPY); //将兼容位图贴到兼容DC for (i = 0; i < iWindCarNum - 1; ++i) { if (!(arrWindCar[i]->isOver())) arrWindCar[i]->drawPic(hComDC, hwnd, iTime, i); } arrWindCar[iWindCarNum - 1]->drawPic(hComDC, hwnd, iTime, i); BitBlt(hDC, 0, 0, 900, 600, hComDC, 0, 0, SRCCOPY); //将兼容DC中位图贴到窗口DC /*销毁创建的资源*/ DeleteObject(hComBp); DeleteObject(hBp); DeleteDC(hComDC); DeleteDC(hBpDC); } if (iWindCarLive == 0) { /*如果没有健在风车，则不用缓冲贴图*/ HBITMAP hBp = LoadBitmap(hIns, MAKEINTRESOURCE(IDB_BITMAP1)); HDC hdc = CreateCompatibleDC(hDC); SelectObject(hdc, hBp); BitBlt(hDC, 0, 0, 900, 600, hdc, 0, 0, SRCCOPY); DeleteDC(hdc); DeleteObject(hBp); /*各种变量还原*/ /* KillTimer(hwnd, 1); for (int k = 0; k < iWindCarNum; k++) delete arrWindCar[k]; iWindCarNum = 0; bStart = false; xPos = 0; yPos = 0; iTime = 0; */ } EndPaint(hwnd, &ps); break; case WM_TIMER: ++ iTime; //记录定时器已消耗的时间周期数 /*如果是第一次响应定时器，则创建风车基类指针数组*/ if (1 == iTime) { iWindCarNum = rand() % 30; if (iWindCarNum < 10) { iWindCarNum += 20; } //随机生成风车数量，不小于10个 iWindCarLive = iWindCarNum; for (int i = 0; i < iWindCarNum - 1; i++) { arrWindCar[i] = new TriWindCar(rand() % 10 - 4, rand() % 5 - 3, xPos, yPos, 10 + rand() % 10, 100 + rand() % 100, 2 + rand() % 4, 10 + rand() % 10); } arrWindCar[iWindCarNum - 1] = new TriWindCar(0, 0, 50, 50, 10, 100, 2, 15); /*随即生成不同类型风车*/ } InvalidateRect(hwnd, NULL, FALSE); break; case WM_LBUTTONDOWN: if (!bStart) { bStart = true; POINTS pt = MAKEPOINTS(lParam); xPos = pt.x; yPos = pt.y; iTime = 0; SetTimer(hwnd, 1, 20, NULL); } else { for (int k = 0; k < iWindCarNum; k++) delete arrWindCar[k]; iWindCarNum = 0; bStart = false; xPos = 0; yPos = 0; iTime = 0; } break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hwnd, uMsg, wParam, lParam); } return 0; }