need to share topology between meshes

hw3d/Mesh.cpp

@@ -34,7 +34,7 @@ const std::string& ModelException::GetNote() const noexcept
 // Mesh
 Mesh::Mesh( Graphics& gfx,std::vector<std::shared_ptr<Bind::Bindable>> bindPtrs )
 {
-	AddBind( std::make_shared<Bind::Topology>( gfx,D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST ) );
+	AddBind( Bind::Topology::Resolve( gfx,D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST ) );
 
 	for( auto& pb : bindPtrs )
 	{