Hy. I use directx for personal study... I have a mesh object pMesh of type ID3DXMesh* in the main class. I create an importer class that create inside a mesh with the function:

Quote: bool CImporter::CreateMesh(int nVertexes, int nIndexes) { HRESULT hr = D3DXCreateMeshFVF(12,8,D3DXMESH_MANAGED,Vertex::FVF,m_Device,&m_mesh); if(FAILED(hr)) { ::MessageBox(0, "Collada CreateMesh() - FAILED", 0, 0); return false; } return true; }

the class have a member var called m_mesh of type ID3DXMesh*. I create an istance of the importer class and pass the mesh class:

Quote: CImporter *cin= new CImporter(pMesh,Device,IMPORTER_COLLADA);

the mesh is loaded correctly in the importer class, but when i'm exit from the importer class the pMesh is null, but in the importer class the mesh have a fine value. Why? Thanks

Thanks , i think that your solution is good.
But for me there is another problem:
I have a member var called m_mesh and in the constructor i assig the parameter value of mesh:

Quote:
CImporter::CImporter(ID3DXMesh*& mesh,IDirect3DDevice9* Device ,int ImporterType)
{
m_mesh = mesh;
m_Device = Device;
switch(ImporterType)
{
case IMPORTER_COLLADA:
m_pApi = new CColladaReaderTriangles();
break;
}

}

but maybe that this is a copy?

m_mesh = mesh;

and if is a copy what type must be the m_mesh if i assign to the reference of mesh?
**ID3DXMesh?

and how i acces the public member of **ID3DXMesh?
i try
**m_mesh->
but don't work.


thanks.

it would be easier to learn about pointer in console application. I've tried to do a simulation of the code.

#include <iostream>
typedef int ID3DXMesh ;//just a simulation
ID3DXMesh* m_Mesh = 0x00000000;
ID3DXMesh* mesh = 0x0041A164;
int _tmain(int argc, _TCHAR* argv[])
{
cout<<"here is the m_Mesh stays: "<<&m_Mesh<<" it points to:"<<m_Mesh<<endl;
cout<<"here is the mesh stays: "<<&mesh<<" it points to:"<<mesh<<endl;
cout<<endl<<endl;
return 0;
}

output:
here is the m_Mesh stays: 0041A160 it points to:00000000
here is the mesh stays: 0041A164 it points to:00000004

dont do this:
m_Mesh = &mesh // you will get a compiler error

first, try this:

m_Mesh = (ID3DXMesh*)&mesh
cout<<"then m_Mesh stays at: "<<&m_Mesh<<" and points to: "<<m_Mesh<<endl;
cout<<"mesh stays at: "<<&mesh<<" and it points to: "<<mesh<<endl;

output:
then m_Mesh stays at: 0041A160 and points to: 0041A164
mesh stays at: 0041A164 and it points to: 00000004

but m_Mesh points to mesh address.
it's not points to where mesh points to, you should replace the
previous code with:

m_Mesh = (ID3DXMesh*)&mesh
m_Mesh = mesh;

output:
then m_Mesh stays at: 0041A160 and points to: 00000004
mesh stays at: 0041A164 and it points to: 00000004

maybe it works, i dunno...
Another way: use IDirect3DMesh::CloneMesh (check for DirectX documentation)

I suppose that find the error:
The pointer mesh is not initializated,is NULL:
if i do this:

Quote:
hr = D3DXCreateMeshFVF(
12,
8,
D3DXMESH_MANAGED,
Vertex::FVF,
Device,
&Mesh);

if(FAILED(hr))
{
::MessageBox(0, "D3DXCreateMeshFVF() - FAILED", 0, 0);
return false;
}


CImporter cin = CImporter(Mesh,Device,IMPORTER_COLLADA);
cin.Init("c:\\giugio.dae");

the mesh is created(recreated) and loaded.
but i i do only this:

Quote:
CImporter cin = CImporter(Mesh,Device,IMPORTER_COLLADA);
cin.Init("c:\\giugio.dae");

i insert this in the constructor:

m_Mesh = (ID3DXMesh*)&mesh
m_Mesh = mesh;

if i check in debug:

output:
then m_Mesh stays at: 0041A160 and points to: 00000000
mesh stays at: 0041A164 and it points to: 00000000



the Mesh var is NULL and i can't create it in the class and out it.
is the possible problem?
and the ID3DXMesh is an abstract class and cant be inizialized!

thanks.