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;
}
