[游戏模版20] Win32 物理引擎 加速运动

  1 #include <windows.h>
  2 // C 运行时头文件
  3 #include <stdlib.h>
  4 #include <cstdio>
  5 #include <malloc.h>
  6 #include <memory.h>
  7 #include <tchar.h>
  8 #include <time.h>
  9 #include <string>
 10 #include <cmath>
 11 
 12 // 全局变量:
 13 HINSTANCE hInst;                                // 当前实例
 14 HBITMAP bg , ball[2];
 15 HDC hdc,mdc,bufdc;
 16 HWND hWnd;
 17 RECT rect;//窗口矩形
 18 int x[2] , y[2];//位置
 19 int vx[2] , vy[2];//速度
 20 int ax[2] , ay[2];//加速度
 21 int t=3;//时间
 22 
 23 // 此代码模块中包含的函数的前向声明:
 24 ATOM                MyRegisterClass(HINSTANCE hInstance);
 25 BOOL                InitInstance(HINSTANCE, int);
 26 LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
 27 INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);
 28 void                MyPaint(HDC hdc);
 29 
 30 
 31 int APIENTRY _tWinMain(HINSTANCE hInstance,
 32                      HINSTANCE hPrevInstance,
 33                      LPTSTR    lpCmdLine,
 34                      int       nCmdShow){
 35 
 36     MSG msg;
 37     MyRegisterClass(hInstance);
 38     // 执行应用程序初始化:
 39     if (!InitInstance (hInstance, nCmdShow)){
 40         return FALSE;
 41     }
 42     // 主消息循环:
 43     while (GetMessage(&msg, NULL, 0, 0)){
 44         TranslateMessage(&msg);
 45         DispatchMessage(&msg);
 46     }
 47     return (int) msg.wParam;
 48 }
 49 
 50 //  函数: MyRegisterClass()
 51 //
 52 //  目的: 注册窗口类。
 53 ATOM MyRegisterClass(HINSTANCE hInstance){
 54     WNDCLASSEX wcex;
 55 
 56     wcex.cbSize = sizeof(WNDCLASSEX);
 57 
 58     wcex.style            = CS_HREDRAW | CS_VREDRAW;
 59     wcex.lpfnWndProc    = WndProc;
 60     wcex.cbClsExtra        = 0;
 61     wcex.cbWndExtra        = 0;
 62     wcex.hInstance        = hInstance;
 63     wcex.hIcon            = NULL;
 64     wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
 65     wcex.hbrBackground    = (HBRUSH)(COLOR_WINDOW+1);
 66     wcex.lpszMenuName    = "Beautifulzzzz";
 67     wcex.lpszClassName    = "Beautifulzzzz";
 68     wcex.hIconSm        = NULL;
 69 
 70     return RegisterClassEx(&wcex);
 71 }
 72 
 73 //
 74 //   函数: InitInstance(HINSTANCE, int)
 75 //
 76 //   目的: 保存实例句柄并创建主窗口
 77 //
 78 //   注释:
 79 //
 80 //        在此函数中，我们在全局变量中保存实例句柄并
 81 //        创建和显示主程序窗口。
 82 //        棋盘拼接以及调用InitGame()开始棋局
 83 BOOL InitInstance(HINSTANCE hInstance, int nCmdShow){
 84    HBITMAP bmp;
 85    hInst = hInstance; // 将实例句柄存储在全局变量中
 86 
 87    hWnd = CreateWindow("Beautifulzzzz","Beautifulzzzz", WS_OVERLAPPEDWINDOW,
 88       CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
 89 
 90    if (!hWnd)
 91    {
 92       return FALSE;
 93    }
 94 
 95    MoveWindow(hWnd,10,10,600,450,true);
 96    ShowWindow(hWnd, nCmdShow);
 97    UpdateWindow(hWnd);
 98 
 99    hdc=GetDC(hWnd);
100    mdc=CreateCompatibleDC(hdc);
101    bufdc=CreateCompatibleDC(hdc);
102 
103    bmp=CreateCompatibleBitmap(hdc,600,480);
104    SelectObject(mdc,bmp);
105 
106    bg=(HBITMAP)LoadImageA(NULL,"bg.bmp",IMAGE_BITMAP,640,480,LR_LOADFROMFILE);
107    ball[0]=(HBITMAP)LoadImageA(NULL,"ball0.bmp",IMAGE_BITMAP,52,26,LR_LOADFROMFILE);
108    ball[1]=(HBITMAP)LoadImageA(NULL,"ball1.bmp",IMAGE_BITMAP,52,26,LR_LOADFROMFILE);
109 
110    GetClientRect(hWnd,&rect);//取得内部窗口区域的大小；
111 
112    x[0]=50;y[0]=50;vx[0]=4;vy[0]=4;ax[0]=0;ay[0]=2;
113    x[1]=380;y[1]=380;vx[1]=-4;vy[1]=-4;ax[1]=0;ay[1]=0;
114 
115    SetTimer(hWnd,1,10,NULL);
116    MyPaint(hdc);
117 
118    return TRUE;
119 }
120 
121 //
122 //  函数: WndProc(HWND, UINT, WPARAM, LPARAM)
123 //
124 //  目的: 处理主窗口的消息。
125 //
126 //  WM_COMMAND    - 处理应用程序菜单
127 //  WM_PAINT    - 绘制主窗口
128 //  WM_DESTROY    - 发送退出消息并返回
129 //
130 LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam){
131     int wmId, wmEvent;
132     PAINTSTRUCT ps;
133 
134     switch (message){
135     case WM_TIMER:
136         A:MyPaint(hdc);
137         break;
138     case WM_PAINT:
139         hdc = BeginPaint(hWnd, &ps);
140         goto A;// TODO: 在此添加任意绘图代码...
141         EndPaint(hWnd, &ps);
142         break;
143     case WM_DESTROY:
144         DeleteDC(mdc);
145         DeleteDC(bufdc);
146         DeleteObject(bg);
147         DeleteObject(ball[0]);
148         DeleteObject(ball[1]);
149 
150         KillTimer(hWnd,1);
151         ReleaseDC(hWnd,hdc);
152 
153         PostQuitMessage(0);
154         break;
155     default:
156         return DefWindowProc(hWnd, message, wParam, lParam);
157     }
158     return 0;
159 }
160 
161 //MyPaint()
162 //1、窗口贴图
163 //2、计算小球贴图坐标并判断小球是否碰撞窗口边缘
164 void MyPaint(HDC hdc){
165     SelectObject(bufdc,bg);
166     BitBlt(mdc,0,0,640,480,bufdc,0,0,SRCCOPY);
167 
168     SelectObject(bufdc,ball[0]);
169     BitBlt(mdc,x[0],y[0],26,26,bufdc,26,0,SRCAND);
170     BitBlt(mdc,x[0],y[0],26,26,bufdc,0,0,SRCPAINT);
171 
172     SelectObject(bufdc,ball[1]);
173     BitBlt(mdc,x[1],y[1],26,26,bufdc,26,0,SRCAND);
174     BitBlt(mdc,x[1],y[1],26,26,bufdc,0,0,SRCPAINT);
175 
176     BitBlt(hdc,0,0,640,480,mdc,0,0,SRCCOPY);
177 
178     for(int i=0;i<2;i++){
179     //计算x轴方向贴图坐标与速度
180         vx[i]+=t*ax[i];
181         x[i]+=vx[i];
182         if(x[i]<=0){
183             x[i]=0;
184             vx[i]=-vx[i];
185         }else if(x[i]>=rect.right-26){
186             x[i]=rect.right-26;
187             vx[i]=-vx[i];
188         }
189 
190         //计算y轴方向坐标及速度
191         vy[i]+=t*ay[i];
192         y[i]+=vy[i];
193         if(y[i]<=0){
194             y[i]=0;
195             vy[i]=-vy[i];
196         }else if(y[i]>=rect.bottom-26){
197             y[i]=rect.bottom-26;
198             vy[i]=-vy[i];
199         }
200     }
201     if((x[0]-x[1])*(x[0]-x[1])+(y[0]-y[1])*(y[0]-y[1])<=1000){
202         vx[0]=-vx[0];vy[0]=-vy[0];
203         vx[1]=-vx[1];vy[1]=-vy[1];
204 
205     }
206 }