怎么解决WIN32中同时按键问题？

thor · 发表于 2006-8-7 17:11:12

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>急！
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>我用WIN32的处理键盘消息的方式。设置VK_LEFT为向左走，VK_SPACE为跳越，我按住左键后，人物一直左走，可这时，按空格后，人物就只是跳跃，没再左走了（这时左键仍然是按下的），可能是系统接受空格消息时，把向左的消息冲掉了，怎么才可以让他们同时被系统所接受呢？

wzn63 · 发表于 2006-8-20 23:16:53

建议楼主再加多一个标志变量,标示按键的状态,比如按下时标示为1,释放为0,好像在消息的高低字节中有区分按下或者释放的。具体多了解点WINAPI的消息机制。[em04]

鼯鼠 · 发表于 2006-8-7 17:33:21

据我所知不会这样的，你把你的代码贴出来

thor · 发表于 2006-8-7 19:31:34

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>#include<windows.h> #include<iostream> #include"d3dx9.h" #pragma comment( lib,"d3d9.lib" ) class girl { public: int Cx,Py,Vy,Ay,num,dir; girl() { Cx=0; //图片X位置 Py=50; //Y位置 Vy=0; //Y速度 Ay=1; //Y方向加速度 num=0; //图片的序列号 dir=1; //人物方向
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> } void Goleft() {
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> num++; if(num>=4) num=0;
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> dir=0;
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> Cx-=4; } void Goright() { num++; if(num>=4) num=0; dir=1;
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> Cx+=4; } void Jump() { if(Py==320) //地面 { Vy=-20; } } void cycle() { Vy+=Ay; Py+=Vy; if(Py>320) { Py=320; Vy=0; } } }; girl g; HWND hWnd; LPDIRECT3D9 g_pD3D=NULL; LPDIRECT3DDEVICE9 g_pd3dDevice=NULL; LPDIRECT3DVERTEXBUFFER9 g_pVB; LPDIRECT3DTEXTURE9 g_pgirl = NULL; LPDIRECT3DTEXTURE9 g_pground=NULL; LPD3DXSPRITE g_pSprite=NULL; ID3DXFont* mfont = NULL; int n=100;
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>struct CUSTOMVERTEX { float x,y,z,rhw; DWORD color; }; #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZRHW|D3DFVF_DIFFUSE) RECT Rectgirl;
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> void d3dClear(); BOOL d3dDeviceCreate(HWND hWnd) { if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) ) return E_FAIL; D3DCAPS9 caps; g_pD3D->GetDeviceCaps(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,&caps); int vp=0; if(caps.DevCaps&D3DDEVCAPS_HWTRANSFORMANDLIGHT) { vp=D3DCREATE_HARDWARE_VERTEXPROCESSING; } else { vp=D3DCREATE_SOFTWARE_VERTEXPROCESSING; } D3DDISPLAYMODE d3ddm; if(g_pD3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT,&d3ddm)!=D3D_OK) { MessageBox(0, "1", 0, 0); return false; } D3DPRESENT_PARAMETERS d3dpp; ZeroMemory(&d3dpp, sizeof(d3dpp));
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> d3dpp.Windowed=true; // d3dpp.MultiSampleQuality = 0; // d3dpp.BackBufferCount = 1; d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD; d3dpp.BackBufferFormat=d3ddm.Format; // d3dpp.AutoDepthStencilFormat=D3DFMT_D16; // d3dpp.EnableAutoDepthStencil=TRUE; // d3dpp.Flags=D3DPRESENTFLAG_LOCKABLE_BACKBUFFER; if(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,hWnd,vp,&d3dpp,&g_pd3dDevice)!=D3D_OK) { MessageBox(0, "3", 0, 0); return false; } g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
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> g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE );
 D3DXCreateSprite( g_pd3dDevice, &g_pSprite ); D3DXCreateTextureFromFileEx(g_pd3dDevice, "1.png", 0, 0,1, 0, D3DFMT_UNKNOWN, D3DPOOL_MANAGED, D3DX_FILTER_LINEAR,D3DX_FILTER_LINEAR, 0xFF000000, NULL, NULL, &g_pgirl); D3DXCreateTextureFromFileEx(g_pd3dDevice, "ground1.png", 0, 0,1, 0, D3DFMT_UNKNOWN, D3DPOOL_MANAGED, D3DX_FILTER_LINEAR,D3DX_FILTER_LINEAR, 0xFF000000, NULL, NULL, &g_pground);
 g_pd3dDevice->SetRenderState( D3DRS_ZENABLE, TRUE );
 g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
 g_pd3dDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
 g_pd3dDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
 g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_MODULATE); D3DXCreateFont(g_pd3dDevice,20,6,FW_NORMAL,0,TRUE,ANSI_CHARSET,OUT_DEFAULT_PRECIS,CLIP_DEFAULT_PRECIS,VARIABLE_PITCH,"Arial",&mfont); return true; } HRESULT InitVertexBuffer() { VOID* pVertices; CUSTOMVERTEX cvVertices[]= {{ 50.0f, 50.0f, 0.5f, 1.0f, 0xff000000 }, 
 { 400.0f, 50.0f, 0.5f, 1.0f, 0xff000000 },
 { 50.0f, 400.0f, 0.5f, 1.0f, 0xff000000},
 { 400.0f, 400.0f, 0.5f,1.0f, 0xff000000},};
 if(FAILED(g_pd3dDevice->CreateVertexBuffer(4*sizeof(CUSTOMVERTEX),0,D3DFVF_CUSTOMVERTEX,D3DPOOL_DEFAULT,&g_pVB,NULL))) { MessageBox ( NULL, TEXT ("!!!!!!"), TEXT ("CreateVertexBuffer failed"), MB_ICONERROR) ; return E_FAIL; }
 g_pVB->Lock(0,sizeof(cvVertices),(void**)&pVertices,0); memcpy(pVertices,cvVertices,sizeof(cvVertices)); g_pVB->Unlock(); return S_OK; }
BOOL d3dCreate(HWND hWnd) { if(!d3dDeviceCreate(hWnd)) return false; d3dClear(); return true; }
void Render() { if(g_pd3dDevice==NULL) { MessageBox(0, "Render() - FAILED", 0, 0); return; } d3dClear(); g.cycle(); char str1[20]=" "; sprintf(str1,"Position:%d ",g.Cx); RECT rc; SetRect(&rc,0,0,80,20); SetRect(&Rectgirl,g.num*32,(g.dir+1)*64,(g.num+1)*32,(g.dir+2)*64); // D3DXVECTOR3 Position={0.0f,0.0f,0.0f}; g_pd3dDevice->BeginScene(); g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX); g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX)); 
 g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP,0,2); g_pSprite->Begin(D3DXSPRITE_ALPHABLEND) ; mfont->DrawText(NULL,str1, sizeof(str1), &rc, DT_LEFT, D3DCOLOR_XRGB(255,255,0)); g_pSprite->Draw(g_pgirl,&Rectgirl,NULL,&D3DXVECTOR3(100, g.Py, 0),0xffffffff); for(int i=0;i<5;i++) {
 g_pSprite->Draw(g_pground,NULL,NULL,&D3DXVECTOR3(i*256-g.Cx, 380, 0),0xffffffff); }
 g_pSprite->End(); g_pd3dDevice->EndScene(); g_pd3dDevice->Present(NULL,NULL,NULL,NULL);
}
void d3dClear() { g_pd3dDevice->Clear(0,0,D3DCLEAR_TARGET,D3DCOLOR_XRGB(0, 0, 0),1.0f,0); } void d3dRelease() { if(mfont) mfont->Release(); if(g_pSprite) g_pSprite->Release(); if(g_pVB) g_pVB->Release(); if(g_pd3dDevice) g_pd3dDevice->Release(); if(g_pD3D) g_pD3D->Release(); }
BOOL InitInstance(HINSTANCE hInstance,int nCmdShow); int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance, PSTR szCmdLine,int iCmdShow) { LRESULT CALLBACK WndProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam); MSG msg;
 WNDCLASSEX wndclass ; wndclass.cbSize = sizeof(WNDCLASSEX); wndclass.style = CS_CLASSDC ; wndclass.lpfnWndProc = WndProc ; wndclass.cbClsExtra = 0 ; wndclass.cbWndExtra = 0 ; wndclass.hInstance = hInstance ; wndclass.hIcon = NULL ; wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ; wndclass.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH) ; wndclass.lpszMenuName = NULL ; wndclass.lpszClassName = "mouse" ; wndclass.hIconSm = NULL; if (!RegisterClassEx (&wndclass)) { MessageBox ( NULL, TEXT ("This program requires Windows NT!"), TEXT ("This program requires Windows NT!"), MB_ICONERROR) ; return 0 ; } if(!InitInstance(hInstance,iCmdShow)) { MessageBox ( NULL, TEXT ("!!!!!!"), TEXT ("This program can't init instance!"), MB_ICONERROR) ; return FALSE; } if(!d3dCreate(hWnd)) { MessageBox(0, "InitD3D() - FAILED", 0, 0); return false; } if(SUCCEEDED(InitVertexBuffer())) { while(msg.message!=WM_QUIT) { if(PeekMessage(&msg,NULL,0,0,PM_REMOVE)) { TranslateMessage (&msg) ; DispatchMessage (&msg) ; } else {
 Render(); } } } return msg.wParam; } BOOL InitInstance(HINSTANCE hInstance,int nCmdShow) {
 hWnd=CreateWindow("mouse","D3D9", WS_OVERLAPPEDWINDOW, 50, 50, 650, 500, GetDesktopWindow(), NULL, hInstance, NULL);
 if(!hWnd) { return FALSE; }
 ShowWindow(hWnd,nCmdShow); UpdateWindow(hWnd); return TRUE; } LRESULT CALLBACK WndProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam) { switch(msg) { case WM_KEYDOWN: switch(wParam) { case VK_ESCAPE: DestroyWindow(hWnd); return 0; break; case VK_SPACE: g.Jump(); break; case VK_LEFT: g.Goleft(); break; case VK_RIGHT: g.Goright(); break;
 } break; case WM_DESTROY: d3dRelease(); PostQuitMessage(0); return 0; break; default: return DefWindowProc(hWnd,msg,wParam,lParam); } return 0; }

代码我简化了一下发上来的，其实就是一个简单的物理系统，不知道怎么让起跳和方向同时进行
最后谢谢鼯鼠大哥肯帮我。[em06]

thor · 发表于 2006-8-7 19:35:32

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>怎么上传文件啊，我想把自己用到的两张图片发上来
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>程序所用图片：
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>file:///E:/c++源程序/3231/1.png
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> file:///E:/c++源程序/3231/ground1.PNG

鼯鼠 · 发表于 2006-8-8 09:54:20

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>说句实话，你的代码有点乱.............
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>这样把，我给你一点提示吧
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>你在MsgProc处理函数里面来响应键盘
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>case WM_KEYDOWN:
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>switch(wParam) {
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> case VK_LEFT: break; case VK_UP: break; case VK_RIGHT: break; case VK_DOWN: break;
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> ｝
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>这样我想应该可以处理你的问题了

thor · 发表于 2006-8-8 15:03:46

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>对不起，我没写注释，但是我觉得貌似只要修改回掉函数，也就是我程序的最后部分
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>LRESULT CALLBACK WndProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam) { switch(msg) { case WM_KEYDOWN: switch(wParam) { case VK_ESCAPE: DestroyWindow(hWnd); return 0; break; case VK_SPACE: g.Jump(); break; case VK_LEFT: g.Goleft(); break; case VK_RIGHT: g.Goright(); break;
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> } break; case WM_DESTROY: d3dRelease(); PostQuitMessage(0); return 0; break; default: return DefWindowProc(hWnd,msg,wParam,lParam); } return 0; }
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>你在上面所说，是可以处理一个键按下的情况，我这里已经可以了，但是怎么处理两键同时按下，确实令我很伤脑筋。不过算了，我正考虑DInput呢。

鼯鼠 · 发表于 2006-8-8 17:12:39

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>这个方法一个两个按键都可以的，我的程序就在用
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>不过你的程序明显有问题，按下空格就销毁窗体？都return 0;还break;

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