学步园

建一个简单的Windows32 Application，然后将代码copy过去

#define DIVI 16<br /> #define DMEM (DIVI*DIVI)<br /> #include <windows.h><br /> #include<stdlib.h><br /> typedef struct<br /> {<br /> double x,y,mx,my,dx,dy;<br /> HBITMAP hbitmap;<br /> }piece;<br /> int WINAPI WinMain(HINSTANCE hinsta nce,HINSTANCE hprevinstance,PSTR szcmdline,int icmdshow)<br /> {<br /> HDC hdc,xdc,mdc;<br /> HWND hwnd;<br /> int cx,cy,counter;<br /> piece particle[DMEM];<br /> HBITMAP hbitmap; // For frame locking<br /> HPEN hpen = CreatePen(PS_SOLID,0,RGB(0,0,0));<br /> HBRUSH hbrush = (HBRUSH)GetStockObject(BLACK_BRUSH);<br /> if(LockWindowUpdate(hwnd = GetDesktopWindow()))<br /> {<br /> hdc = GetDCEx(hwnd,NULL,DCX_CACHE | DCX_LOCKWINDOWUPDATE);<br /> xdc = CreateCompatibleDC(hdc);<br /> mdc = CreateCompatibleDC(hdc);<br /> // Now get the size of each rectangle<br /> cx = GetSystemMetrics(SM_CXSCREEN)/DIVI;<br /> cy = GetSystemMetrics(SM_CYSCREEN)/DIVI;<br /> // Now create all the pieces...<br /> srand((int)GetCurrentTime()); // Initialize random seed<br /> hbitmap = CreateCompatibleBitmap(hdc,cx*DIVI,cy*DIVI); // The size of the whole screen<br /> for(int index = 0;index < DMEM;index++)<br /> {<br /> particle[index].hbitmap = CreateCompatibleBitmap(hdc,cx,cy); // The size of a piece is (cx,cy)<br /> particle[index].mx = (double)((rand()%16)-8);<br /> particle[index].my = (double)((rand()%16)-8);<br /> }<br /> // Now the pieces need to be grabbed<br /> counter = 0; // Reset counter<br /> for(int x = 0;x < cx*DIVI;x += cx)<br /> {<br /> for(int y = 0;y < cy*DIVI;y += cy)<br /> {<br /> SelectObject(xdc,particle[counter].hbitmap);<br /> particle[counter].x = (double)x;<br /> particle[counter].y = (double)y;<br /> particle[counter].dx = x;<br /> particle[counter].dy = y;<br /> BitBlt(xdc,0,0,cx,cy,hdc,x,y,SRCCOPY);<br /> counter++;<br /> }<br /> }<br /> // Run for 8000 frames<br /> for(int frame = 0;frame < 325;frame++)<br /> {<br /> SelectObject(xdc,hbitmap);<br /> SelectObject(xdc,hpen);<br /> SelectObject(xdc,hbrush); // Select an empty shader for the result bitmap<br /> Rectangle(xdc,0,0,cx*DIVI,cy*DIVI); // Fill with zero value<br /> for(int index = 0;index < DMEM;index++)<br /> {<br /> SelectObject(mdc,particle[index].hbitmap); // Get that bitmap!<br /> BitBlt(xdc,(int)particle[index].x,(int)particle[index].y,cx,cy,mdc,0,0,SRCCOPY); // Draw the particle<br /> particle[index].x += particle[index].mx;<br /> particle[index].y += particle[index].my;<br /> particle[index].my += 0.1;<br /> }<br /> BitBlt(hdc,0,0,cx*DIVI,cy*DIVI,xdc,0,0,SRCCOPY);<br /> }<br /> Sleep(1000); // Sleep for a second<br /> // Now run using a tracking method for recombine!<br /> for(int dframe = 0;dframe < 200;dframe++)<br /> {<br /> SelectObject(xdc,hbitmap);<br /> SelectObject(xdc,hpen);<br /> SelectObject(xdc,hbrush); // Select an empty shader for the result bitmap<br /> Rectangle(xdc,0,0,cx*DIVI,cy*DIVI); // Fill with zero value<br /> for(int index = 0;index < DMEM;index++)<br /> {<br /> if(dframe == 180)<br /> {<br /> particle[index].x = particle[index].dx;<br /> particle[index].y = particle[index].dy;<br /> }<br /> SelectObject(mdc,particle[index].hbitmap); // Get that bitmap!<br /> BitBlt(xdc,(int)particle[index].x,(int)particle[index].y,cx,cy,mdc,0,0,SRCCOPY); // Draw the particle<br /> double dist_x = particle[index].x-particle[index].dx;<br /> double dist_y = particle[index].y-particle[index].dy;<br /> dist_x /= 16;<br /> dist_y /= 16;<br /> particle[index].x -= dist_x;<br /> particle[index].y -= dist_y;<br /> }<br /> BitBlt(hdc,0,0,cx*DIVI,cy*DIVI,xdc,0,0,SRCCOPY);<br /> }<br /> // Now pack everything away<br /> DeleteObject(hbitmap);<br /> for(int dindex = 0;dindex < DMEM;dindex++)<br /> DeleteObject(particle[dindex].hbitmap);<br /> ReleaseDC(hwnd,hdc);<br /> DeleteDC(hdc);<br /> DeleteDC(xdc);<br /> DeleteDC(mdc);<br /> LockWindowUpdate(hwnd);<br /> }<br /> DeleteObject(hpen);<br /> DeleteObject(hbrush);<br /> //MessageBox(hwnd,"That was cool!","Cool",MB_ICONEXCLAMATION);<br /> return 1;<br /> }<br />