D3D 纹理 例子程序

程序目的

将纹理图片显示到图元表面。

程序实现

#pragma once#pragma comment(lib,"winmm.lib")#pragma comment(lib,"d3d9.lib")#pragma comment(lib,"d3dx9.lib")#include<d3d9.h>#include<d3dx9.h>struct CUSTOMVERTEX{D3DXVECTOR3 position;FLOAT tu;FLOAT tv;};#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_TEX1)LRESULT CALLBACK MsgProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam);HRESULT Init(HWND hWnd);HRESULT InitD3D(HWND hWnd);HRESULT InitGeometry();void SetUpMatrices();void SetUpTextures();void Render();void CleanUp();//global variables.LPDIRECT3D9 pd3d9=NULL;LPDIRECT3DDEVICE9 pd3dDevice9=NULL;LPDIRECT3DVERTEXBUFFER9 pd3dVB=NULL;LPDIRECT3DTEXTURE9 pd3dTexture=NULL;INT WINAPI wWinMain(HINSTANCE,HINSTANCE,LPWSTR,INT){//wnd class.WNDCLASSEX wcex;ZeroMemory(&wcex,sizeof(wcex));wcex.cbSize=sizeof(wcex);wcex.hInstance=GetModuleHandle(NULL);wcex.lpfnWndProc=MsgProc;wcex.lpszClassName=L"DXTextures";wcex.style=CS_CLASSDC;//register class.RegisterClassEx(&wcex);//create window.HWND hWnd=CreateWindowEx(WS_EX_OVERLAPPEDWINDOW,L"DXTextures",L"DXTextures Window",WS_OVERLAPPEDWINDOW,100,100,300,300,NULL,NULL,wcex.hInstance,NULL);//show window.ShowWindow(hWnd,SW_SHOWDEFAULT);UpdateWindow(hWnd);//init global variables.if(FAILED(Init(hWnd))){return -1;}//message loopMSG msg;ZeroMemory(&msg,sizeof(msg));while(msg.message != WM_QUIT){if(PeekMessage(&msg,hWnd,0,0,PM_REMOVE)){TranslateMessage(&msg);DispatchMessage(&msg);}else{Render();}}return 0;}LRESULT CALLBACK MsgProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam){switch(msg){case WM_DESTROY:CleanUp();PostQuitMessage(0);return 0;}return DefWindowProc(hWnd,msg,wParam,lParam);}void Render(){pd3dDevice9->Clear(0,NULL,D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER,D3DCOLOR_XRGB(0,0,255),1.0f,0);if(SUCCEEDED(pd3dDevice9->BeginScene())){SetUpMatrices();SetUpTextures();pd3dDevice9->SetStreamSource( 0, pd3dVB, 0, sizeof( CUSTOMVERTEX ) );pd3dDevice9->SetFVF( D3DFVF_CUSTOMVERTEX );pd3dDevice9->DrawPrimitive( D3DPT_TRIANGLESTRIP, 0, 2 * 50 - 2 );pd3dDevice9->EndScene();}pd3dDevice9->Present(NULL,NULL,NULL,NULL);}HRESULT InitD3D(HWND hWnd){//create d3d.pd3d9=Direct3DCreate9(D3D_SDK_VERSION);if(pd3d9 == NULL){return E_FAIL;}//init present param.D3DPRESENT_PARAMETERS d3dpp;ZeroMemory(&d3dpp,sizeof(d3dpp));d3dpp.Windowed=TRUE;d3dpp.BackBufferFormat=D3DFMT_UNKNOWN;d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD;d3dpp.EnableAutoDepthStencil=TRUE;d3dpp.AutoDepthStencilFormat=D3DFMT_D16;//create device.if(FAILED(pd3d9->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,hWnd,D3DCREATE_SOFTWARE_VERTEXPROCESSING,&d3dpp,&pd3dDevice9))){return E_FAIL;}return S_OK;}void CleanUp(){if(pd3dVB != NULL){pd3dVB->Release();pd3dVB=NULL;}if(pd3dDevice9 != NULL){pd3dDevice9->Release();pd3dDevice9=NULL;}if(pd3d9 != NULL){pd3d9->Release();pd3d9=NULL;}}void SetUpMatrices(){//world matrix.D3DXMATRIXA16 worldMat;D3DXMatrixIdentity(&worldMat);D3DXMatrixRotationY(&worldMat,timeGetTime()/1000.0f);pd3dDevice9->SetTransform(D3DTS_WORLD,&worldMat);//view matrix.D3DXMATRIXA16 viewMat;D3DXVECTOR3 vEye(0.0f,2.0f,-5.0f);D3DXVECTOR3 vLookAt(0.0f,0.0f,0.0f);D3DXVECTOR3 vUp(0.0f,1.0f,0.0f);D3DXMatrixLookAtLH(&viewMat,&vEye,&vLookAt,&vUp);pd3dDevice9->SetTransform(D3DTS_VIEW,&viewMat);//projection matrix.D3DXMATRIXA16 projMat;D3DXMatrixPerspectiveFovLH(&projMat,D3DX_PI/4,1.0f,1.0f,1000.0f);pd3dDevice9->SetTransform(D3DTS_PROJECTION,&projMat);}HRESULT InitGeometry(){//create texture.if(FAILED(D3DXCreateTextureFromFile(pd3dDevice9,L"dxts.jpg",&pd3dTexture))){return E_FAIL;}//create vertex buffer.if(FAILED(pd3dDevice9->CreateVertexBuffer(50*2*sizeof(CUSTOMVERTEX),0,D3DFVF_CUSTOMVERTEX,D3DPOOL_DEFAULT,&pd3dVB,NULL))){return E_FAIL;}//assgin value.CUSTOMVERTEX* pVertices;if(FAILED(pd3dVB->Lock(0,50*2*sizeof(CUSTOMVERTEX),(void**)&pVertices,0))){return E_FAIL;}for( DWORD i = 0; i < 50; i++ )    {       FLOAT theta = ( 2 * D3DX_PI * i ) / ( 50 - 1 );        pVertices[2 * i + 0].position = D3DXVECTOR3( cosf( theta ), -1.0f, sinf( theta ) );pVertices[2 * i + 0].tu=(2*(FLOAT)i)/49.0f;pVertices[2 * i + 0].tv=1.0f;        pVertices[2 * i + 1].position = D3DXVECTOR3( cosf( theta ), 1.0f, sinf( theta ) );pVertices[2 * i + 1].tu=(2*(FLOAT)i)/49.0f;pVertices[2 * i + 1].tv=0.0f;    }pd3dVB->Unlock();    // Turn off culling    pd3dDevice9->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );    // Turn off D3D lighting    pd3dDevice9->SetRenderState( D3DRS_LIGHTING, FALSE );    // Turn on the zbuffer    pd3dDevice9->SetRenderState( D3DRS_ZENABLE, TRUE );return S_OK;}void SetUpTextures(){pd3dDevice9->SetTexture(0,pd3dTexture);}HRESULT Init(HWND hWnd){if(FAILED(InitD3D(hWnd))){return E_FAIL;}if(FAILED(InitGeometry())){return E_FAIL;}return S_OK;}

程序结果

总结

1.d3d学习至今，纹理卡的时间最长，里面涉及的参数太多。现在也不是很懂。

2.d3d大约的流程是：声明一种特性，特性初始化，设置这种特性，使用这种特性。

3.如果想运行这个程序，将DX路径配置好，寻找一个图片，大小2的幂数，修改名字为dxts.jpg加载到工程就可以运行了。

4.学习d3d看来是需要有知识基础的，数学里面的空间与几何是需要的，后面还将会用到矩阵，路漫漫...

5.上周去面试发现这些都没有什么用，唉，等到什么程度才能真的顶用呢?