bool XFileUtils::LoadMesh(
ID3DXFileData* pFileData,
IDirect3DDevice9* pDevice,
ID3DXMesh** pNewMesh,
ID3DXBuffer** pMaterial,
DWORD* pNumAttribute,
GSkinInfo** pNewSkininfo)
{
//检查类型
_XCheckType(pFileData, "Mesh", false);
DWORD nVertices = 0;
DWORD nFaces = 0;
_XCheckExcute(ParseBasemesh(pFileData, &nVertices, &nFaces,
nullptr, nullptr, sizeof(XVertex_p3_n3_t1)));
ID3DXMesh* pMesh = nullptr;
if (FAILED(D3DXCreateMeshFVF(nFaces, nVertices,
D3DXMESH_32BIT | D3DXMESH_MANAGED, XVertex_p3_n3_t1::fvf, pDevice, &pMesh)))
return false;
void* pVertices = nullptr;
DWORD* pIndices = nullptr;
DWORD* pAttribtues = nullptr;
pMesh->LockVertexBuffer(0, &pVertices);
pMesh->LockIndexBuffer(0, (void**)&pIndices);
pMesh->LockAttributeBuffer(0, &pAttribtues);
_XCheckExcute(ParseBasemesh(pFileData, &nVertices, &nFaces,
pVertices, pIndices, sizeof(XVertex_p3_n3_t1)));
_XCheckExcute(ParseNormals(pFileData, nVertices, pVertices, pIndices,
sizeof(XVertex_p3_n3_t1), sizeof(D3DXVECTOR3)));
_XCheckExcute(ParseTexcoord(pFileData, pVertices,
sizeof(XVertex_p3_n3_t1), sizeof(D3DXVECTOR3) * 2));
_XCheckExcute(ParseMaterial(pFileData, pAttribtues, nFaces, pNumAttribute, pMaterial));
pMesh->UnlockAttributeBuffer();
pMesh->UnlockIndexBuffer();
pMesh->UnlockVertexBuffer();
*pNewMesh = pMesh;
ParseSkinInfo(pFileData, pNewSkininfo);
return true;
}
/** Merges a set of D3DXMeshes. */
static void MergeD3DXMeshes(
IDirect3DDevice9* Device,
TRefCountPtr<ID3DXMesh>& OutMesh,TArray<int32>& OutBaseFaceIndex,const TArray<ID3DXMesh*>& Meshes)
{
TArray<D3DVERTEXELEMENT9> VertexElements;
GetD3D9MeshVertexDeclarations(VertexElements);
// Count the number of faces and vertices in the input meshes.
int32 NumFaces = 0;
int32 NumVertices = 0;
for(int32 MeshIndex = 0;MeshIndex < Meshes.Num();MeshIndex++)
{
NumFaces += Meshes[MeshIndex]->GetNumFaces();
NumVertices += Meshes[MeshIndex]->GetNumVertices();
}
// Create mesh for source data
VERIFYD3D9RESULT(D3DXCreateMesh(
NumFaces,
NumVertices,
D3DXMESH_SYSTEMMEM,
(D3DVERTEXELEMENT9*)VertexElements.GetData(),
Device,
OutMesh.GetInitReference()
) );
// Fill D3DXMesh
FUtilVertex* ResultVertices;
uint16* ResultIndices;
::DWORD * ResultAttributes;
OutMesh->LockVertexBuffer(0,(LPVOID*)&ResultVertices);
OutMesh->LockIndexBuffer(0,(LPVOID*)&ResultIndices);
OutMesh->LockAttributeBuffer(0, &ResultAttributes);
int32 BaseVertexIndex = 0;
int32 BaseFaceIndex = 0;
for(int32 MeshIndex = 0;MeshIndex < Meshes.Num();MeshIndex++)
{
ID3DXMesh* Mesh = Meshes[MeshIndex];
FUtilVertex* Vertices;
uint16* Indices;
::DWORD * Attributes;
Mesh->LockVertexBuffer(0,(LPVOID*)&Vertices);
Mesh->LockIndexBuffer(0,(LPVOID*)&Indices);
Mesh->LockAttributeBuffer(0, &Attributes);
for(uint32 FaceIndex = 0;FaceIndex < Mesh->GetNumFaces();FaceIndex++)
{
for(uint32 VertexIndex = 0;VertexIndex < 3;VertexIndex++)
{
*ResultIndices++ = BaseVertexIndex + *Indices++;
}
}
OutBaseFaceIndex.Add(BaseFaceIndex);
BaseFaceIndex += Mesh->GetNumFaces();
FMemory::Memcpy(ResultVertices,Vertices,Mesh->GetNumVertices() * sizeof(FUtilVertex));
ResultVertices += Mesh->GetNumVertices();
BaseVertexIndex += Mesh->GetNumVertices();
FMemory::Memcpy(ResultAttributes,Attributes,Mesh->GetNumFaces() * sizeof(uint32));
ResultAttributes += Mesh->GetNumFaces();
Mesh->UnlockIndexBuffer();
Mesh->UnlockVertexBuffer();
Mesh->UnlockAttributeBuffer();
}
OutMesh->UnlockIndexBuffer();
OutMesh->UnlockVertexBuffer();
OutMesh->UnlockAttributeBuffer();
}
void Terrain::buildSubGridMesh(RECT& R, VertexPNT* gridVerts)
{
//===============================================================
// Create the subgrid mesh.
ID3DXMesh* subMesh = 0;
D3DVERTEXELEMENT9 elems[MAX_FVF_DECL_SIZE];
UINT numElems = 0;
HR(VertexPNT::Decl->GetDeclaration(elems, &numElems));
HR(D3DXCreateMesh(SubGrid::NUM_TRIS, SubGrid::NUM_VERTS,
D3DXMESH_MANAGED, elems, gd3dDevice, &subMesh));
//===============================================================
// Build Vertex Buffer. Copy rectangle of vertices from the
// grid into the subgrid structure.
VertexPNT* v = 0;
HR(subMesh->LockVertexBuffer(0, (void**)&v));
int k = 0;
for(int i = R.top; i <= R.bottom; ++i)
{
for(int j = R.left; j <= R.right; ++j)
{
v[k++] = gridVerts[i*mVertCols+j];
}
}
//===============================================================
// Compute the bounding box before unlocking the vertex buffer.
AABB bndBox;
HR(D3DXComputeBoundingBox((D3DXVECTOR3*)v, subMesh->GetNumVertices(),
sizeof(VertexPNT), &bndBox.minPt, &bndBox.maxPt));
HR(subMesh->UnlockVertexBuffer());
//===============================================================
// Build Index and Attribute Buffer.
// Get indices for subgrid (we don't use the verts here--the verts
// are given by the parameter gridVerts).
std::vector<D3DXVECTOR3> tempVerts;
std::vector<DWORD> tempIndices;
GenTriGrid(SubGrid::NUM_ROWS, SubGrid::NUM_COLS, mDX, mDZ,
D3DXVECTOR3(0.0f, 0.0f, 0.0f), tempVerts, tempIndices);
WORD* indices = 0;
DWORD* attBuff = 0;
HR(subMesh->LockIndexBuffer(0, (void**)&indices));
HR(subMesh->LockAttributeBuffer(0, &attBuff));
for(int i = 0; i < SubGrid::NUM_TRIS; ++i)
{
indices[i*3+0] = (WORD)tempIndices[i*3+0];
indices[i*3+1] = (WORD)tempIndices[i*3+1];
indices[i*3+2] = (WORD)tempIndices[i*3+2];
attBuff[i] = 0; // All in subset 0.
}
HR(subMesh->UnlockIndexBuffer());
HR(subMesh->UnlockAttributeBuffer());
//===============================================================
// Optimize for the vertex cache and build attribute table.
DWORD* adj = new DWORD[subMesh->GetNumFaces()*3];
HR(subMesh->GenerateAdjacency(EPSILON, adj));
HR(subMesh->OptimizeInplace(D3DXMESHOPT_VERTEXCACHE|D3DXMESHOPT_ATTRSORT,
adj, 0, 0, 0));
delete[] adj;
//===============================================================
// Save the mesh and bounding box.
mSubGridMeshes.push_back(subMesh);
mSubGridBndBoxes.push_back(bndBox);
}
ID3DXMesh* CMesh::createD3DXMesh() const
{
HRESULT hr;
ID3DXMesh* dxMesh = 0;
DWORD meshOpts = D3DXMESH_MANAGED;
if( getIndexStride() == 4 )
meshOpts |= D3DXMESH_32BIT;
// get declaration
D3DVERTEXELEMENT9 decl[MAX_FVF_DECL_SIZE];
UINT numElements;
getVertexDecl().getObject()->GetDeclaration( decl, &numElements );
// create mesh
hr = D3DXCreateMesh( getIndexCount()/3, getVertexCount(), meshOpts, decl, &CD3DDevice::getInstance().getDevice(), &dxMesh );
if( FAILED(hr) )
return NULL;
// copy VB
{
const void* srcVB = lockVBRead();
void* dxVB = 0;
hr = dxMesh->LockVertexBuffer( 0, &dxVB );
if( FAILED(hr) ) {
dxMesh->Release();
return NULL;
}
memcpy( dxVB, srcVB, getVertexCount() * getVertexStride() );
hr = dxMesh->UnlockVertexBuffer();
unlockVBRead();
}
// copy IB
{
const void* srcIB = lockIBRead();
void* dxIB = 0;
hr = dxMesh->LockIndexBuffer( 0, &dxIB );
if( FAILED(hr) ) {
dxMesh->Release();
return NULL;
}
memcpy( dxIB, srcIB, getIndexCount() * getIndexStride() );
hr = dxMesh->UnlockIndexBuffer();
unlockIBRead();
}
// copy groups
{
int ngroups = getGroupCount();
D3DXATTRIBUTERANGE* attrs = new D3DXATTRIBUTERANGE[ngroups];
DWORD* attrBuf = 0;
hr = dxMesh->LockAttributeBuffer( 0, &attrBuf );
if( FAILED(hr) ) {
dxMesh->Release();
return NULL;
}
for( int g = 0; g < ngroups; ++g ) {
attrs[g].AttribId = g;
const CMesh::CGroup& group = getGroup(g);
attrs[g].VertexStart = group.getFirstVertex();
attrs[g].VertexCount = group.getVertexCount();
attrs[g].FaceStart = group.getFirstPrim();
attrs[g].FaceCount = group.getPrimCount();
for( int f = 0; f < group.getPrimCount(); ++f )
*attrBuf++ = g;
}
dxMesh->UnlockAttributeBuffer();
hr = dxMesh->SetAttributeTable( attrs, ngroups );
delete[] attrs;
}
return dxMesh;
}
//--------------------------------------------------------------------------------------
HRESULT CMeshLoader::Create( IDirect3DDevice9* pd3dDevice, const WCHAR* strFilename )
{
HRESULT hr;
WCHAR str[ MAX_PATH ] = {0};
// Start clean
Destroy();
// Store the device pointer
m_pd3dDevice = pd3dDevice;
// Load the vertex buffer, index buffer, and subset information from a file. In this case,
// an .obj file was chosen for simplicity, but it's meant to illustrate that ID3DXMesh objects
// can be filled from any mesh file format once the necessary data is extracted from file.
//V_RETURN( LoadGeometryFromOBJ( strFilename ) );
V_RETURN( LoadGeometryFromOBJ_Fast( strFilename ) );
// Set the current directory based on where the mesh was found
WCHAR wstrOldDir[MAX_PATH] = {0};
GetCurrentDirectory( MAX_PATH, wstrOldDir );
SetCurrentDirectory( m_strMediaDir );
// Load material textures
for( int iMaterial = 0; iMaterial < m_Materials.GetSize(); iMaterial++ )
{
Material* pMaterial = m_Materials.GetAt( iMaterial );
if( pMaterial->strTexture[0] )
{
// Avoid loading the same texture twice
bool bFound = false;
for( int x = 0; x < iMaterial; x++ )
{
Material* pCur = m_Materials.GetAt( x );
if( 0 == wcscmp( pCur->strTexture, pMaterial->strTexture ) )
{
bFound = true;
pMaterial->pTexture = pCur->pTexture;
break;
}
}
// Not found, load the texture
if( !bFound )
{
V_RETURN( DXUTFindDXSDKMediaFileCch( str, MAX_PATH, pMaterial->strTexture ) );
V_RETURN( D3DXCreateTextureFromFile( pd3dDevice, pMaterial->strTexture,
&( pMaterial->pTexture ) ) );
int a = 0;
}
}
}
// Restore the original current directory
SetCurrentDirectory( wstrOldDir );
// Create the encapsulated mesh
ID3DXMesh* pMesh = NULL;
V_RETURN( D3DXCreateMesh( m_Indices.GetSize() / 3, m_Vertices.GetSize(),
D3DXMESH_MANAGED | D3DXMESH_32BIT, VERTEX_DECL,
pd3dDevice, &pMesh ) );
// Copy the vertex data
VERTEX* pVertex;
V_RETURN( pMesh->LockVertexBuffer( 0, ( void** )&pVertex ) );
memcpy( pVertex, m_Vertices.GetData(), m_Vertices.GetSize() * sizeof( VERTEX ) );
pMesh->UnlockVertexBuffer();
m_Vertices.RemoveAll();
// Copy the index data
DWORD* pIndex;
V_RETURN( pMesh->LockIndexBuffer( 0, ( void** )&pIndex ) );
memcpy( pIndex, m_Indices.GetData(), m_Indices.GetSize() * sizeof( DWORD ) );
pMesh->UnlockIndexBuffer();
m_Indices.RemoveAll();
// Copy the attribute data
DWORD* pSubset;
V_RETURN( pMesh->LockAttributeBuffer( 0, &pSubset ) );
memcpy( pSubset, m_Attributes.GetData(), m_Attributes.GetSize() * sizeof( DWORD ) );
pMesh->UnlockAttributeBuffer();
m_Attributes.RemoveAll();
// Reorder the vertices according to subset and optimize the mesh for this graphics
// card's vertex cache. When rendering the mesh's triangle list the vertices will
// cache hit more often so it won't have to re-execute the vertex shader.
DWORD* aAdjacency = new DWORD[pMesh->GetNumFaces() * 3];
if( aAdjacency == NULL )
return E_OUTOFMEMORY;
V( pMesh->GenerateAdjacency( 1e-6f, aAdjacency ) );
V( pMesh->OptimizeInplace( D3DXMESHOPT_ATTRSORT | D3DXMESHOPT_VERTEXCACHE, aAdjacency, NULL, NULL, NULL ) );
SAFE_DELETE_ARRAY( aAdjacency );
m_pMesh = pMesh;
return S_OK;
}
void PropsDemo::buildGrass()
{
D3DVERTEXELEMENT9 elems[MAX_FVF_DECL_SIZE];
UINT numElems = 0;
HR(GrassVertex::Decl->GetDeclaration(elems, &numElems));
HR(D3DXCreateMesh(NUM_GRASS_BLOCKS*2, NUM_GRASS_BLOCKS*4, D3DXMESH_MANAGED,
elems, gd3dDevice, &mGrassMesh));
GrassVertex* v = 0;
WORD* k = 0;
HR(mGrassMesh->LockVertexBuffer(0, (void**)&v));
HR(mGrassMesh->LockIndexBuffer(0, (void**)&k));
int indexOffset = 0;
// Scale down the region in which we generate grass.
int w = (int)(mTerrain->getWidth() * 0.15f);
int d = (int)(mTerrain->getDepth() * 0.15f);
// Randomly generate a grass block (three intersecting quads) around the
// terrain in the height range [35, 50] (similar to the trees).
for(int i = 0; i < NUM_GRASS_BLOCKS; ++i)
{
//============================================
// Construct vertices.
// Generate random position in region. Note that we also shift
// this region to place it in the world.
float x = (float)((rand() % w) - (w*0.5f)) - 30.0f;
float z = (float)((rand() % d) - (d*0.5f)) - 20.0f;
float y = mTerrain->getHeight(x, z);
// Only generate grass blocks in this height range. If the height
// is outside this range, generate a new random position and
// try again.
if(y < 37.0f || y > 40.0f)
{
--i; // We are trying again, so decrement back the index.
continue;
}
float sx = GetRandomFloat(0.75f, 1.25f);
float sy = GetRandomFloat(0.75f, 1.25f);
float sz = GetRandomFloat(0.75f, 1.25f);
D3DXVECTOR3 pos(x, y, z);
D3DXVECTOR3 scale(sx, sy, sz);
buildGrassFin(v, k, indexOffset, pos, scale);
v += 4;
k += 6;
}
HR(mGrassMesh->UnlockVertexBuffer());
HR(mGrassMesh->UnlockIndexBuffer());
// Fill in the attribute buffer (everything in subset 0)
DWORD* attributeBufferPtr = 0;
HR(mGrassMesh->LockAttributeBuffer(0, &attributeBufferPtr));
for(UINT i = 0; i < mGrassMesh->GetNumFaces(); ++i)
attributeBufferPtr[i] = 0;
HR(mGrassMesh->UnlockAttributeBuffer());
DWORD* adj = new DWORD[mGrassMesh->GetNumFaces()*3];
HR(mGrassMesh->GenerateAdjacency(EPSILON, adj));
HR(mGrassMesh->OptimizeInplace(D3DXMESHOPT_ATTRSORT|D3DXMESHOPT_VERTEXCACHE,
adj, 0, 0, 0));
delete [] adj;
}
