//=============================================================================// Desc: 顶点雾化效果//=============================================================================#include <d3dx9.h>//-----------------------------------------------------------------------------// 全局变量//-----------------------------------------------------------------------------LPDIRECT3D9 g_pD3D = NULL; //Direct3D对象LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; //Direct3D设备对象LPD3DXMESH g_pMesh = NULL; //网格模型对象D3DMATERIAL9* g_pMeshMaterials = NULL; //网格模型材料LPDIRECT3DTEXTURE9* g_pMeshTextures = NULL; //网格模型纹理DWORD g_dwNumMaterials = 0L; //网格模型子块数量//----------------------------------------------------------------------------// Desc: //----------------------------------------------------------------------------inline FLOAT HeightField( FLOAT x, FLOAT z )
{
FLOAT y = 0.0f; y += 10.0f * cosf( 0.051f*x + 0.0f ) * sinf( 0.055f*x + 0.0f ); y += 10.0f * cosf( 0.053f*z + 0.0f ) * sinf( 0.057f*z + 0.0f ); y += 2.0f * cosf( 0.101f*x + 0.0f ) * sinf( 0.105f*x + 0.0f ); y += 2.0f * cosf( 0.103f*z + 0.0f ) * sinf( 0.107f*z + 0.0f ); y += 2.0f * cosf( 0.251f*x + 0.0f ) * sinf( 0.255f*x + 0.0f ); y += 2.0f * cosf( 0.253f*z + 0.0f ) * sinf( 0.257f*z + 0.0f ); return y;
}//-----------------------------------------------------------------------------// Desc: 初始化Direct3D//-----------------------------------------------------------------------------HRESULT InitD3D( HWND hWnd ){ //创建Direct3D对象, 该对象用来创建Direct3D设备对象 if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) ) return E_FAIL; //设置D3DPRESENT_PARAMETERS结构, 准备创建Direct3D设备对象 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; //创建Direct3D设备对象 if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice ) ) )
{ return E_FAIL;
} //设置环境光 g_pd3dDevice->SetRenderState( D3DRS_AMBIENT, 0xffffffff ); //设置雾的颜色 g_pd3dDevice->SetRenderState(D3DRS_FOGCOLOR, 0xff0000ff); //设置纹理过滤状态 g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE ); g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 ); g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR ); g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR ); return S_OK;}//-----------------------------------------------------------------------------// Desc: 从绝对路径中提取纹理文件名//-----------------------------------------------------------------------------void RemovePathFromFileName(LPSTR fullPath, LPWSTR fileName){ //先将fullPath的类型变换为LPWSTR WCHAR wszBuf[MAX_PATH]; MultiByteToWideChar( CP_ACP, 0, fullPath, -1, wszBuf, MAX_PATH ); wszBuf[MAX_PATH-1] = L'/0'; WCHAR* wszFullPath = wszBuf; //从绝对路径中提取文件名 LPWSTR pch=wcsrchr(wszFullPath,'//'); if (pch) lstrcpy(fileName, ++pch); else lstrcpy(fileName, wszFullPath);}//-----------------------------------------------------------------------------// Desc: 创建场景图形//-----------------------------------------------------------------------------HRESULT InitGeometry(){ LPD3DXBUFFER pD3DXMtrlBuffer; //存储模型材料的缓冲区对象 //从磁盘文件加载网格模型 if( FAILED( D3DXLoadMeshFromX( L"seafloor.x", D3DXMESH_SYSTEMMEM, g_pd3dDevice, NULL, &pD3DXMtrlBuffer, NULL, &g_dwNumMaterials, &g_pMesh ) ) ) { MessageBox(NULL, L"Could not find seafloor.x", L"Fog", MB_OK); return E_FAIL; } //从网格模型中提取材料属性和纹理文件名 D3DXMATERIAL* d3dxMaterials = (D3DXMATERIAL*)pD3DXMtrlBuffer->GetBufferPointer(); g_pMeshMaterials = new D3DMATERIAL9[g_dwNumMaterials]; //材料结构数组 if( g_pMeshMaterials == NULL ) return E_OUTOFMEMORY; g_pMeshTextures = new LPDIRECT3DTEXTURE9[g_dwNumMaterials]; if( g_pMeshTextures == NULL ) return E_OUTOFMEMORY; //逐块提取网格模型材料属性和纹理文件名 for( DWORD i=0; i<g_dwNumMaterials; i++ ) { //复制材料属性 g_pMeshMaterials[i] = d3dxMaterials[i].MatD3D; g_pMeshMaterials[i].Ambient = g_pMeshMaterials[i].Diffuse; g_pMeshTextures[i] = NULL; if( d3dxMaterials[i].pTextureFilename != NULL && strlen(d3dxMaterials[i].pTextureFilename) > 0 ) { //获取纹理文件名 WCHAR filename[256]; RemovePathFromFileName(d3dxMaterials[i].pTextureFilename, filename); //创建纹理 if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, filename, &g_pMeshTextures[i] ) ) ) { MessageBox(NULL, L"Could not find texture map", L"Fog", MB_OK); } } } //释放在加载模型文件时创建的保存模型材质和纹理信息的缓冲区对象 pD3DXMtrlBuffer->Release(); //修改网格模型 LPDIRECT3DVERTEXBUFFER9 pVB; if( SUCCEEDED( g_pMesh->GetVertexBuffer( &pVB ) ) ) { struct VERTEX { FLOAT x,y,z,tu,tv;}; VERTEX* pVertices; DWORD dwNumVertices = g_pMesh->GetNumVertices(); pVB->Lock( 0, 0, (void**)&pVertices, 0 ); for( DWORD i=0; i<dwNumVertices; i++ ) pVertices[i].y = HeightField( pVertices[i].x, pVertices[i].z ); pVB->Unlock(); pVB->Release(); } return S_OK;}//-----------------------------------------------------------------------------// Desc: 释放创建对象//-----------------------------------------------------------------------------VOID Cleanup(){ //释放网格模型材料 if( g_pMeshMaterials != NULL ) delete[] g_pMeshMaterials; //释放网格模型纹理 if( g_pMeshTextures ) { for( DWORD i = 0; i < g_dwNumMaterials; i++ ) { if( g_pMeshTextures[i] ) g_pMeshTextures[i]->Release(); } delete[] g_pMeshTextures; } //释放网格模型对象 if( g_pMesh != NULL ) g_pMesh->Release(); //释放Direct3D设备对象 if( g_pd3dDevice != NULL) g_pd3dDevice->Release(); //释放Direct3D对象 if( g_pD3D != NULL) g_pD3D->Release();}//-------------------------------------------------// Desc: 设置变换矩阵//--------------------------------------------------VOID SetupMatrices(){ //创建并设置世界矩阵 D3DXMATRIXA16 matWorld; D3DXMatrixRotationY( &matWorld, timeGetTime()/1000.0f ); //D3DXMatrixIdentity(&matWorld); g_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld ); //创建并设置观察矩阵 D3DXVECTOR3 vEyePt( 0.0f, 30.0f,-100.0f ); D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f ); D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f ); D3DXMATRIXA16 matView; D3DXMatrixLookAtLH( &matView, &