ddraw: ComputeSphereVisibility

[David Adam]

Hello,

I am trying to debug the demo of The Sting. Now, the main is that the screen
is almost black. It is surely related to the following FIXME:
fixme:d3d7:IDirect3DDeviceImpl_7_ComputeSphereVisibility

Unfortunately, I did not find any informations about this function. Does
anyone know what this function does, ( and better knows a possible
implementation)?

Thanks,

David Adam