DX3D怎么改变一个三角形在在窗口上的位置?
这是我写得代码，但是就是移动不了位置，各位同学们帮帮忙啦，我刚学dx,搞不懂那个矩阵转过来转过去的有什么用。
#include <Windows.h>#include<d3d9.h>#include<d3dx9.h>#pragma comment(lib, "d3d9.lib")#pragma comment(lib, "d3dx9.lib")LRESULT WINAPI MsgProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam);const int width=800;const int height=600;//----------------------------------------------------IDirect3D9* g_d3d=NULL;IDirect3DDevice9* g_dev=NULL;IDirect3DVertexBuffer9 * g_vb=NULL;D3DXMATRIX g_orgho;D3DXMATRIX x,y,p;//----------------------------------------------------bool InitializeD3D(HWND,bool);bool InitializeObject();void Render();void shutdown();#define D3DFVF_VERTEX (D3DFVF_XYZRHW) struct stD3DVertex { float x,y,z,row; DWORD col; };//----------------------------------------------------int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE PrevInstance,PSTR cmdLine,int ShowCmd){ HWND hWnd;//窗口句柄 //=================定义窗口类====================== WNDCLASS wc; wc.style = CS_CLASSDC; wc.lpfnWndProc = &MsgProc; wc.cbClsExtra = 0; wc.cbWndExtra = 0; wc.hInstance =NULL ; wc.hIcon =NULL ; wc.hCursor =LoadCursor(NULL,IDC_ARROW) ; wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); wc.lpszMenuName =NULL; wc.lpszClassName ="Class1"; //---------------------------------------------------- //=================注册窗口类========================= RegisterClass(&wc); //---------------------------------------------------- //创建窗口 hWnd=CreateWindow("Class1","Game",WS_OVERLAPPEDWINDOW,100,100,width,height,NULL,NULL,hInstance,NULL); ShowWindow(hWnd,SW_SHOWDEFAULT); UpdateWindow(hWnd); MSG msg; if (InitializeD3D(hWnd,false)) { ZeroMemory(&msg, sizeof(msg)); while(msg.message != WM_QUIT) { if(PeekMessage(&msg,hWnd,0,0,PM_REMOVE)) { TranslateMessage(&msg); DispatchMessage(&msg); } else { Render(); } } } shutdown(); UnregisterClass("Class1",hInstance); return 0;}LRESULT WINAPI MsgProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam){ switch(msg) { case WM_DESTROY: PostQuitMessage(0); return 0; break; case WM_KEYUP: if(wParam==VK_ESCAPE) PostQuitMessage(0); return 0; break; } return DefWindowProc(hWnd,msg,wParam,lParam);}bool InitializeD3D(HWND hWnd,bool FullScreen){ D3DPRESENT_PARAMETERS d3dpp; D3DDISPLAYMODE Displaymode; ZeroMemory(&d3dpp, sizeof(d3dpp)); g_d3d =Direct3DCreate9(D3D_SDK_VERSION); if(g_d3d==NULL){MessageBox(0,"获得D3D接口失败!",0,0);return false;} if(FAILED(g_d3d->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &Displaymode))) {MessageBox(0,"获得设备显示模式失败!",0,0);return false;} if(FullScreen) { d3dpp.Windowed=false; d3dpp.BackBufferHeight=height; d3dpp.BackBufferWidth=width; } else d3dpp.Windowed = TRUE; d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; d3dpp.BackBufferFormat = Displaymode.Format; if(FAILED(g_d3d->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,hWnd,D3DCREATE_SOFTWARE_VERTEXPROCESSING ,&d3dpp,&g_dev))){MessageBox(0,"获得D3D设备失败!",0,0);return false;} if (FAILED(InitializeObject())){MessageBox(0,"初始化图形对象失败!",0,0);return false;} return true; }bool InitializeObject(){ DWORD col=D3DCOLOR_XRGB(255,255,0); stD3DVertex st[3]= { {320,150,0, 1.0f ,col}, {420,350,0,1.0f,D3DCOLOR_XRGB(255,0,0)}, {220,350,0,1.0f,D3DCOLOR_XRGB(0,255,0)}, }; g_dev->CreateVertexBuffer(sizeof(st),0,D3DFVF_VERTEX,D3DPOOL_DEFAULT,&g_vb,NULL); if (g_vb==NULL){MessageBox(0,"创建顶点缓存失败!",0,0);return false;} void*pt=NULL; g_vb->Lock(0,sizeof(st),(void**)&pt,0); memcpy(pt,st,sizeof(st)); g_vb->Unlock(); D3DXVECTOR3 pos(0.0f,0.0f,-5.0f); D3DXVECTOR3 target(0.0f,0.0f,0.0f); D3DXVECTOR3 up(0.0f,1.0f,0.0f); D3DXMATRIX V; D3DXMatrixLookAtLH(&V,&pos,&target,&up); g_dev->SetTransform(D3DTS_VIEW,&V); D3DXMATRIX proj; D3DXMatrixPerspectiveFovLH(&proj,D3DX_PI*0.5f,(float)width/(float)height,1.0f,1000.0f); g_dev->SetTransform(D3DTS_PROJECTION,&proj); D3DXMatrixTranslation(&x, 5000.0f, 100.0f, 0.0f); g_dev->SetTransform(D3DTS_PROJECTION,&x); return true;}void Render(){ g_dev->SetTransform(D3DTS_WORLD,&p);g_dev->Clear(0,NULL,D3DCLEAR_TARGET,D3DCOLOR_XRGB(0,0,0),1.0f,0);g_dev->BeginScene();g_dev->SetStreamSource(0,g_vb,NULL,sizeof(stD3DVertex));g_dev->SetFVF(D3DFVF_VERTEX);g_dev->DrawPrimitive(D3DPT_TRIANGLELIST,0,1);g_dev->EndScene();g_dev->Present(0,0,0,0);}void shutdown(){ if (g_d3d!=NULL)g_d3d->Release(); if(g_dev!=NULL)g_dev->Release(); g_d3d=NULL; g_dev=NULL; g_vb->Release(); }