// ______________________________________________________________________________________

HRESULT CGraphicsMesh::LoadXFile( char* pstrPathName )
{
	HRESULT r = 0;

	// The buffer to hold the materials

	LPD3DXBUFFER pMaterialBuffer = 0;

	// Load the x file from disk

	r = D3DXLoadMeshFromX( pstrPathName, D3DXMESH_MANAGED /*D3DXMESH_SYSTEMMEM*/, g_pDevice, 0, 
							&pMaterialBuffer, (DWORD*)&m_NumMats, &m_pMesh );
	if( FAILED( r ) )
	{
		SetError( "Failed to load XFile with file name:" );
		SetError( pstrPathName );
		return E_FAIL;
	}

	// Create a new texture array

	m_pTextures = new LPDIRECT3DTEXTURE8[ m_NumMats ];
	// Create a new material array

	m_pMaterials = new CGraphicsMaterial[ m_NumMats ];

	// Get a pointer to the start of the material buffer

	D3DXMATERIAL* pMaterials = (D3DXMATERIAL*)pMaterialBuffer->GetBufferPointer();

	// Loop for each material in the buffer

	for( int i = 0 ; i < m_NumMats ; i++ )
	{


		// Extract the material from the buffer

		m_pMaterials[i].m_Material = pMaterials[i].MatD3D;
		// Brighten the material

		m_pMaterials[i].m_Material.Ambient = m_pMaterials[i].m_Material.Diffuse;
		
		// If a texture is not set for this material

		if( !pMaterials[i].pTextureFilename )
		{
			// Set the texture to the default texture 

			m_pTextures[i] = g_pDefaultTexture;

			// Iterate to the next loop because there is no texture

			continue;
		}
		
		// Create a new texture from the filename supplied

		r = D3DXCreateTextureFromFile( g_pDevice, pMaterials[i].pTextureFilename, &m_pTextures[i] );
		if( FAILED( r ) )
		{
			SetError( "Unable to load texture for mesh with filname:" );
			SetError( pMaterials[i].pTextureFilename );
			
			// If the texture load failed then set

			// it to the default texture

			m_pTextures[i] = g_pDefaultTexture;
		}
	}

	// Release the material buffer

	pMaterialBuffer->Release();

	return S_OK;

}


// ______________________________________________________________________________________

HRESULT CGraphicsMesh::Render()
{
	HRESULT r = E_FAIL;

	g_pDevice->SetVertexShader( GRAPHICS_VERTEX_TYPE );

	// Loop for each material

	for( int i = 0 ; i < m_NumMats; i=i+1 )
	{
		// Set this material as active

		m_pMaterials[i].Update();
		// Set this texture as active

		g_pDevice->SetTexture( 0, m_pTextures[i] );
		// Render this subset of the mesh

		r = m_pMesh->DrawSubset(i);

		// Reset the vertex shader	

	}

	// Return the result of the render operation

	return r;
}
     

  
// Set this material as active

// ______________________________________________________________________________________

HRESULT CGraphicsMaterial::Update()
{
	return g_pDevice->SetMaterial( &m_Material );
}