D3d mesh example Program

D3d mesh example program Purpose

Load a simple. x resource file to display the mesh model.

Program Implementation

#pragma once#pragma comment(lib,"winmm.lib")#pragma comment(lib,"d3d9.lib")#pragma comment(lib,"d3dx9.lib")#include<d3d9.h>#include<d3dx9.h>LRESULT CALLBACK MsgProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam);HRESULT Init(HWND hWnd);HRESULT InitD3D(HWND hWnd);void InitMatrices();HRESULT InitGeometry();void SetUpMatrices();void Render();void CleanUp();LPDIRECT3D9 g_pd3d9=NULL;LPDIRECT3DDEVICE9 g_pd3dDevice9=NULL;D3DXMATRIXA16 worldMatrix;D3DXMATRIXA16 viewMatrix;D3DXMATRIXA16 projectionMatrix;LPD3DXMESH g_pd3dMesh=NULL;D3DMATERIAL9* g_pd3dMeshMaterial=NULL;LPDIRECT3DTEXTURE9* g_pd3dMeshTexture=NULL;DWORD g_dwNumMaterials=0;INT WINAPI wWinMain(HINSTANCE,HINSTANCE,LPWSTR,INT){WNDCLASSEX wcex;ZeroMemory(&wcex,sizeof(wcex));wcex.cbSize=sizeof(wcex);wcex.hInstance=GetModuleHandle(NULL);wcex.lpfnWndProc=MsgProc;wcex.lpszClassName=L"DXMeshes";wcex.style=CS_CLASSDC;RegisterClassEx(&wcex);HWND hWnd=CreateWindowEx(WS_EX_OVERLAPPEDWINDOW,L"DXMeshes",L"DXMeshes Window",WS_OVERLAPPEDWINDOW,100,100,300,300,NULL,NULL,wcex.hInstance,NULL);ShowWindow(hWnd,SW_SHOWDEFAULT);UpdateWindow(hWnd);if(FAILED(Init(hWnd))){return -1;}MSG msg;ZeroMemory(&msg,sizeof(msg));while(msg.message != WM_QUIT){if(PeekMessage(&msg,hWnd,0,0,PM_REMOVE)){TranslateMessage(&msg);DispatchMessage(&msg);}else{Render();}}UnregisterClass(L"DXMeshes",wcex.hInstance);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);}HRESULT Init(HWND hWnd){if(FAILED(InitD3D(hWnd))){return E_FAIL;}InitMatrices();if(FAILED(InitGeometry())){return E_FAIL;}return S_OK;}HRESULT InitD3D(HWND hWnd){g_pd3d9=Direct3DCreate9(D3D_SDK_VERSION);if(g_pd3d9 == NULL){return E_FAIL;}D3DPRESENT_PARAMETERS d3dpp;ZeroMemory(&d3dpp,sizeof(d3dpp));d3dpp.Windowed=TRUE;d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD;d3dpp.BackBufferFormat=D3DFMT_UNKNOWN;d3dpp.EnableAutoDepthStencil=TRUE;d3dpp.AutoDepthStencilFormat=D3DFMT_D16;if(FAILED(g_pd3d9->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,hWnd,D3DCREATE_SOFTWARE_VERTEXPROCESSING,&d3dpp,&g_pd3dDevice9))){return E_FAIL;}return S_OK;}void Render(){g_pd3dDevice9->Clear(0,NULL,D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER,D3DCOLOR_XRGB(0,0,255),1.0f,0);if(SUCCEEDED(g_pd3dDevice9->BeginScene())){SetUpMatrices();for(DWORD i=0;i<g_dwNumMaterials;i++){g_pd3dDevice9->SetMaterial(&g_pd3dMeshMaterial[i]);g_pd3dDevice9->SetTexture(0,g_pd3dMeshTexture[i]);g_pd3dMesh->DrawSubset(i);}g_pd3dDevice9->EndScene();}g_pd3dDevice9->Present(NULL,NULL,NULL,NULL);}void CleanUp(){if(g_pd3dMeshMaterial != NULL){delete[] g_pd3dMeshMaterial;g_pd3dMeshMaterial=NULL;}if(g_pd3dMeshTexture != NULL){for(DWORD i=0;i<g_dwNumMaterials;i++){if(g_pd3dMeshTexture[i] != NULL){g_pd3dMeshTexture[i]->Release();g_pd3dMeshTexture[i]=NULL;}}delete[] g_pd3dMeshTexture;g_pd3dMeshTexture=NULL;}if(g_pd3dMesh != NULL){g_pd3dMesh->Release();g_pd3dMesh=NULL;}if(g_pd3dDevice9 != NULL){g_pd3dDevice9->Release();g_pd3dDevice9=NULL;}if(g_pd3d9 != NULL){g_pd3d9->Release();g_pd3d9=NULL;}}void InitMatrices(){//world matrix.D3DXMatrixIdentity(&worldMatrix);g_pd3dDevice9->SetTransform(D3DTS_WORLD,&worldMatrix);//view matrix.D3DXVECTOR3 vEye(0.0f,3.0f,-5.0f);D3DXVECTOR3 vLookAt(0.0f,0.0f,0.0f);D3DXVECTOR3 vUp(0.0f,1.0f,0.0f);D3DXMatrixLookAtLH(&viewMatrix,&vEye,&vLookAt,&vUp);g_pd3dDevice9->SetTransform(D3DTS_VIEW,&viewMatrix);//projection matrix.D3DXMatrixPerspectiveFovLH(&projectionMatrix,D3DX_PI/4,1.0f,1.0f,1000.0f);g_pd3dDevice9->SetTransform(D3DTS_PROJECTION,&projectionMatrix);}void SetUpMatrices(){D3DXMatrixRotationY(&worldMatrix,timeGetTime()/1000.0f);g_pd3dDevice9->SetTransform(D3DTS_WORLD,&worldMatrix);}HRESULT InitGeometry(){LPD3DXBUFFER pd3dxMtrlBuffer;if(FAILED(D3DXLoadMeshFromX(L"Tiger.x",D3DXMESH_SYSTEMMEM,g_pd3dDevice9,NULL,&pd3dxMtrlBuffer,NULL,&g_dwNumMaterials,&g_pd3dMesh))){return E_FAIL;}D3DXMATERIAL* d3dxMaterials=(D3DXMATERIAL*)pd3dxMtrlBuffer->GetBufferPointer();g_pd3dMeshMaterial=new D3DMATERIAL9[g_dwNumMaterials];if(g_pd3dMeshMaterial == NULL){return E_OUTOFMEMORY;}g_pd3dMeshTexture=new LPDIRECT3DTEXTURE9[g_dwNumMaterials];if(g_pd3dMeshTexture == NULL){return E_OUTOFMEMORY;}for(DWORD i=0;i<g_dwNumMaterials;i++){g_pd3dMeshMaterial[i]=d3dxMaterials[i].MatD3D;g_pd3dMeshMaterial[i].Ambient=g_pd3dMeshMaterial[i].Diffuse;if(d3dxMaterials[i].pTextureFilename != NULL&& lstrlenA(d3dxMaterials[i].pTextureFilename) > 0){if(FAILED(D3DXCreateTextureFromFileA(g_pd3dDevice9,d3dxMaterials[i].pTextureFilename,&g_pd3dMeshTexture[i]))){return E_FAIL;}}}pd3dxMtrlBuffer->Release();g_pd3dDevice9->SetRenderState(D3DRS_ZENABLE,TRUE);g_pd3dDevice9->SetRenderState(D3DRS_AMBIENT,0xffffffff);return S_OK;}

Running result

Summary

1. This is not very difficult. After loading the. X file, you can obtain various data from the loaded object and display it in sequence during rendering.

2. More exercises will become more and more skillful.