[游戏模版20] Win32 物理引擎 加速运动

 

>_<:Compared with previous talk,there will be taking about how to create an accelerated speed.Only a little change in the MyPaint(...) function.

>_<:resource

>_<:code

  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 }