[Bug 17117] New: Chicken Tournament: needs ComputeSphereVisibility

http://bugs.winehq.org/show_bug.cgi?id=17117

Summary: Chicken Tournament: needs ComputeSphereVisibility
           Product: Wine
           Version: 1.1.13
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: directx-ddraw
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

CT needs ComputeSphereVisibility function. A implementation found here:
http://www.nabble.com/ComputeSphereVisibility:-a-patch-td20506949.html

does not work very well, sometimes it's totally wrong, then the upper and lower
quarter of the screen seems not to be checked correctly, everything in here is
"invisible" and not rendered therefore.