dxutmesh.cpp

DX例子中等难度的。全是新例子。VC2003

//-----------------------------------------------------------------------------
// File: DXUTMesh.cpp
//
// Desc: Support code for loading DirectX .X files.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
#include "dxstdafx.h"
#include <dxfile.h>
#include <rmxfguid.h>
#include <rmxftmpl.h>
#include "DXUTMesh.h"
#undef min // use __min instead
#undef max // use __max instead




//-----------------------------------------------------------------------------
CDXUTMesh::CDXUTMesh( LPCWSTR strName )
{
    StringCchCopy( m_strName, 512, strName );
    m_pMesh              = NULL;
    m_pMaterials         = NULL;
    m_pTextures          = NULL;
    m_bUseMaterials      = TRUE;
    m_pVB                = NULL;
    m_pIB                = NULL;
    m_pDecl              = NULL;
    m_strMaterials       = NULL;
    m_dwNumMaterials     = 0;
    m_dwNumVertices      = 0;
    m_dwNumFaces         = 0;
    m_dwBytesPerVertex   = 0;
}




//-----------------------------------------------------------------------------
CDXUTMesh::~CDXUTMesh()
{
    Destroy();
}




//-----------------------------------------------------------------------------
HRESULT CDXUTMesh::Create( LPDIRECT3DDEVICE9 pd3dDevice, LPCWSTR strFilename )
{
    WCHAR        strPath[MAX_PATH];
    LPD3DXBUFFER pAdjacencyBuffer = NULL;
    LPD3DXBUFFER pMtrlBuffer = NULL;
    HRESULT      hr;

    // Cleanup previous mesh if any
    Destroy();

    // Find the path for the file, and convert it to ANSI (for the D3DX API)
    DXUTFindDXSDKMediaFileCch( strPath, sizeof(strPath) / sizeof(WCHAR), strFilename );

    // Load the mesh
    if( FAILED( hr = D3DXLoadMeshFromX( strPath, D3DXMESH_MANAGED, pd3dDevice, 
                                        &pAdjacencyBuffer, &pMtrlBuffer, NULL,
                                        &m_dwNumMaterials, &m_pMesh ) ) )
    {
        return hr;
    }

    // Optimize the mesh for performance
    if( FAILED( hr = m_pMesh->OptimizeInplace(
                        D3DXMESHOPT_COMPACT | D3DXMESHOPT_ATTRSORT | D3DXMESHOPT_VERTEXCACHE,
                        (DWORD*)pAdjacencyBuffer->GetBufferPointer(), NULL, NULL, NULL ) ) )
    {
        SAFE_RELEASE( pAdjacencyBuffer );
        SAFE_RELEASE( pMtrlBuffer );
        return hr;
    }

    // Set strPath to the path of the mesh file
    WCHAR *pLastBSlash = wcsrchr( strPath, L'\\' );
    if( pLastBSlash )
        *(pLastBSlash + 1) = L'\0';
    else
        *strPath = L'\0';

    D3DXMATERIAL* d3dxMtrls = (D3DXMATERIAL*)pMtrlBuffer->GetBufferPointer();
    hr = CreateMaterials( strPath, pd3dDevice, d3dxMtrls, m_dwNumMaterials );

    SAFE_RELEASE( pAdjacencyBuffer );
    SAFE_RELEASE( pMtrlBuffer );

    // Extract data from m_pMesh for easy access
    D3DVERTEXELEMENT9 decl[MAX_FVF_DECL_SIZE];
    m_dwNumVertices    = m_pMesh->GetNumVertices();
    m_dwNumFaces       = m_pMesh->GetNumFaces();
    m_dwBytesPerVertex = m_pMesh->GetNumBytesPerVertex();
    m_pMesh->GetIndexBuffer( &m_pIB );
    m_pMesh->GetVertexBuffer( &m_pVB );
    m_pMesh->GetDeclaration( decl );
    pd3dDevice->CreateVertexDeclaration( decl, &m_pDecl );

    return hr;
}


//-----------------------------------------------------------------------------
HRESULT CDXUTMesh::Create( LPDIRECT3DDEVICE9 pd3dDevice,
                           LPD3DXFILEDATA pFileData )
{
    LPD3DXBUFFER pMtrlBuffer = NULL;
    LPD3DXBUFFER pAdjacencyBuffer = NULL;
    HRESULT      hr;

    // Cleanup previous mesh if any
    Destroy();

    // Load the mesh from the DXFILEDATA object
    if( FAILED( hr = D3DXLoadMeshFromXof( pFileData, D3DXMESH_MANAGED, pd3dDevice,
                                          &pAdjacencyBuffer, &pMtrlBuffer, NULL,
                                          &m_dwNumMaterials, &m_pMesh ) ) )
    {
        return hr;
    }

    // Optimize the mesh for performance
    if( FAILED( hr = m_pMesh->OptimizeInplace(
                        D3DXMESHOPT_COMPACT | D3DXMESHOPT_ATTRSORT | D3DXMESHOPT_VERTEXCACHE,
                        (DWORD*)pAdjacencyBuffer->GetBufferPointer(), NULL, NULL, NULL ) ) )
    {
        SAFE_RELEASE( pAdjacencyBuffer );
        SAFE_RELEASE( pMtrlBuffer );
        return hr;
    }

    D3DXMATERIAL* d3dxMtrls = (D3DXMATERIAL*)pMtrlBuffer->GetBufferPointer();
    hr = CreateMaterials( L"", pd3dDevice, d3dxMtrls, m_dwNumMaterials );

    SAFE_RELEASE( pAdjacencyBuffer );
    SAFE_RELEASE( pMtrlBuffer );

    // Extract data from m_pMesh for easy access
    D3DVERTEXELEMENT9 decl[MAX_FVF_DECL_SIZE];
    m_dwNumVertices    = m_pMesh->GetNumVertices();
    m_dwNumFaces       = m_pMesh->GetNumFaces();
    m_dwBytesPerVertex = m_pMesh->GetNumBytesPerVertex();
    m_pMesh->GetIndexBuffer( &m_pIB );
    m_pMesh->GetVertexBuffer( &m_pVB );
    m_pMesh->GetDeclaration( decl );
    pd3dDevice->CreateVertexDeclaration( decl, &m_pDecl );

    return hr;
}


//-----------------------------------------------------------------------------
HRESULT CDXUTMesh::Create( LPDIRECT3DDEVICE9 pd3dDevice, ID3DXMesh* pInMesh, 
                           D3DXMATERIAL* pd3dxMaterials, DWORD dwMaterials )
{
    // Cleanup previous mesh if any
    Destroy();

    // Optimize the mesh for performance
    DWORD *rgdwAdjacency = NULL;
    rgdwAdjacency = new DWORD[pInMesh->GetNumFaces() * 3];
    if( rgdwAdjacency == NULL )
        return E_OUTOFMEMORY;
    pInMesh->GenerateAdjacency(1e-6f,rgdwAdjacency);

    D3DVERTEXELEMENT9 decl[MAX_FVF_DECL_SIZE];
    pInMesh->GetDeclaration( decl );

    DWORD dwOptions = pInMesh->GetOptions();
    dwOptions &= ~(D3DXMESH_32BIT | D3DXMESH_SYSTEMMEM | D3DXMESH_WRITEONLY);
    dwOptions |= D3DXMESH_MANAGED;
    dwOptions |= D3DXMESHOPT_COMPACT | D3DXMESHOPT_ATTRSORT | D3DXMESHOPT_VERTEXCACHE;

    ID3DXMesh* pTempMesh = NULL;
    if( FAILED( pInMesh->Optimize( dwOptions, rgdwAdjacency, NULL, NULL, NULL, &pTempMesh ) ) )
    {
        SAFE_DELETE_ARRAY( rgdwAdjacency );
        return E_FAIL;
    }

    SAFE_DELETE_ARRAY( rgdwAdjacency );
    SAFE_RELEASE( m_pMesh );
    m_pMesh = pTempMesh;

    HRESULT hr;
    hr = CreateMaterials( L"", pd3dDevice, pd3dxMaterials, dwMaterials );

    // Extract data from m_pMesh for easy access
    m_dwNumVertices    = m_pMesh->GetNumVertices();
    m_dwNumFaces       = m_pMesh->GetNumFaces();
    m_dwBytesPerVertex = m_pMesh->GetNumBytesPerVertex();
    m_pMesh->GetIndexBuffer( &m_pIB );
    m_pMesh->GetVertexBuffer( &m_pVB );
    m_pMesh->GetDeclaration( decl );
    pd3dDevice->CreateVertexDeclaration( decl, &m_pDecl );

    return hr;
}


//-----------------------------------------------------------------------------
HRESULT CDXUTMesh::CreateMaterials( LPCWSTR strPath, IDirect3DDevice9 *pd3dDevice, D3DXMATERIAL* d3dxMtrls, DWORD dwNumMaterials )
{
    // Get material info for the mesh
    // Get the array of materials out of the buffer
    m_dwNumMaterials = dwNumMaterials;
    if( d3dxMtrls && m_dwNumMaterials > 0 )
    {
        // Allocate memory for the materials and textures
        m_pMaterials = new D3DMATERIAL9[m_dwNumMaterials];
        if( m_pMaterials == NULL )
            return E_OUTOFMEMORY;
        m_pTextures = new LPDIRECT3DBASETEXTURE9[m_dwNumMaterials];
        if( m_pTextures == NULL )
            return E_OUTOFMEMORY;
        m_strMaterials = new CHAR[m_dwNumMaterials][MAX_PATH];
        if( m_strMaterials == NULL )
            return E_OUTOFMEMORY;

        // Copy each material and create its texture
        for( DWORD i=0; i<m_dwNumMaterials; i++ )
        {
            // Copy the material
            m_pMaterials[i]         = d3dxMtrls[i].MatD3D;
            m_pTextures[i]          = NULL;

            // Create a texture
            if( d3dxMtrls[i].pTextureFilename )
            {
                StringCchCopyA( m_strMaterials[i], MAX_PATH, d3dxMtrls[i].pTextureFilename );

                WCHAR strTexture[MAX_PATH];
                WCHAR strTextureTemp[MAX_PATH];
                D3DXIMAGE_INFO ImgInfo;

                // First attempt to look for texture in the same folder as the input folder.
                MultiByteToWideChar( CP_ACP, 0, d3dxMtrls[i].pTextureFilename, -1, strTextureTemp, MAX_PATH );
                strTextureTemp[MAX_PATH-1] = 0;

                StringCchCopy( strTexture, MAX_PATH, strPath );
                StringCchCat( strTexture, MAX_PATH, strTextureTemp );

                // Inspect the texture file to determine the texture type.
                if( FAILED( D3DXGetImageInfoFromFile( strTexture, &ImgInfo ) ) )
                {
                    // Search the media folder
                    if( FAILED( DXUTFindDXSDKMediaFileCch( strTexture, MAX_PATH, strTextureTemp ) ) )
                        continue;  // Can't find. Skip.

                    D3DXGetImageInfoFromFile( strTexture, &ImgInfo );
                }

                // Call the appropriate loader according to the texture type.
                switch( ImgInfo.ResourceType )
                {
                    case D3DRTYPE_TEXTURE:
                    {
                        IDirect3DTexture9 *pTex;
                        if( SUCCEEDED( D3DXCreateTextureFromFile( pd3dDevice, strTexture, &pTex ) ) )
                        {
                            // Obtain the base texture interface
                            pTex->QueryInterface( IID_IDirect3DBaseTexture9, (LPVOID*)&m_pTextures[i] );
                            // Release the specialized instance
                            pTex->Release();
                        }
                        break;
                    }
                    case D3DRTYPE_CUBETEXTURE:
                    {
                        IDirect3DCubeTexture9 *pTex;
                        if( SUCCEEDED( D3DXCreateCubeTextureFromFile( pd3dDevice, strTexture, &pTex ) ) )
                        {
                            // Obtain the base texture interface
                            pTex->QueryInterface( IID_IDirect3DBaseTexture9, (LPVOID*)&m_pTextures[i] );
                            // Release the specialized instance
                            pTex->Release();
                        }
                        break;
                    }
                    case D3DRTYPE_VOLUMETEXTURE:
                    {
                        IDirect3DVolumeTexture9 *pTex;
                        if( SUCCEEDED( D3DXCreateVolumeTextureFromFile( pd3dDevice, strTexture, &pTex ) ) )
                        {
                            // Obtain the base texture interface
                            pTex->QueryInterface( IID_IDirect3DBaseTexture9, (LPVOID*)&m_pTextures[i] );
                            // Release the specialized instance
                            pTex->Release();
                        }
                        break;
                    }
                }
            }
        }
    }
    return S_OK;
}


//-----------------------------------------------------------------------------
HRESULT CDXUTMesh::SetFVF( LPDIRECT3DDEVICE9 pd3dDevice, DWORD dwFVF )
{
    LPD3DXMESH pTempMesh = NULL;

    if( m_pMesh )
    {
        if( FAILED( m_pMesh->CloneMeshFVF( m_pMesh->GetOptions(), dwFVF,
                                           pd3dDevice, &pTempMesh ) ) )
        {
            SAFE_RELEASE( pTempMesh );
            return E_FAIL;
        }

        DWORD dwOldFVF = 0;
        dwOldFVF = m_pMesh->GetFVF();
        SAFE_RELEASE( m_pMesh );
        m_pMesh = pTempMesh;

        // Compute normals if they are being requested and
        // the old mesh does not have them.
        if( !(dwOldFVF & D3DFVF_NORMAL) && dwFVF & D3DFVF_NORMAL )
        {
            D3DXComputeNormals( m_pMesh, NULL );
        }
    }

    return S_OK;
}




//-----------------------------------------------------------------------------
// Convert the mesh to the format specified by the given vertex declarations.
//-----------------------------------------------------------------------------
HRESULT CDXUTMesh::SetVertexDecl( LPDIRECT3DDEVICE9 pd3dDevice, const D3DVERTEXELEMENT9 *pDecl, 
                                  bool bAutoComputeNormals, bool bAutoComputeTangents, 
                                  bool bSplitVertexForOptimalTangents )
{
    LPD3DXMESH pTempMesh = NULL;

    if( m_pMesh )
    {
        if( FAILED( m_pMesh->CloneMesh( m_pMesh->GetOptions(), pDecl,
                                        pd3dDevice, &pTempMesh ) ) )
        {
            SAFE_RELEASE( pTempMesh );
            return E_FAIL;
        }
    }


    // Check if the old declaration contains a normal.
    bool bHadNormal = false;
    bool bHadTangent = false;
    D3DVERTEXELEMENT9 aOldDecl[MAX_FVF_DECL_SIZE];
    if( m_pMesh && SUCCEEDED( m_pMesh->GetDeclaration( aOldDecl ) ) )
    {