Bad picking in parallel projection mode

[Bill Lorensen]

Roberto,
         Thanks for the bug report and fix. Your changes have been checked into the cvs repository.

Your report was timely. I needed to do picking today with a parallel projection. Your fix saved me mucho time,

Long live open source!!

Bill

At 11:58 AM 11/10/99 +0100, Roberto Gori wrote:
>Try with this patch.
>*** graphics/vtkPicker.org      Wed Oct  6 12:14:21 1999
>--- graphics/vtkPicker.cxx      Wed Oct  6 15:42:47 1999
>***************
>*** 242,255 ****
>       } 
>   
>     clipRange = camera->GetClippingRange();
>! 
>!   tF = clipRange[0] / rayLength;
>!   tB = clipRange[1] / rayLength;
>!   for (i=0; i<3; i++) 
>!     {
>!     p1World[i] = cameraPos[i] + tF*ray[i];
>!     p2World[i] = cameraPos[i] + tB*ray[i];
>!     }
>     p1World[3] = p2World[3] = 1.0;
>   
>     // Compute the tolerance in world coordinates.  Do this by
>--- 242,265 ----
>       } 
>   
>     clipRange = camera->GetClippingRange();
>!   
>!   if ( camera->GetParallelProjection() ) {
>!     tF = clipRange[0] - rayLength;
>!     tB = clipRange[1] - rayLength;
>!     for (i=0; i<3; i++) 
>!       {
>!       p1World[i] = PickPosition[i] + tF*cameraDOP[i];
>!       p2World[i] = PickPosition[i] + tB*cameraDOP[i];
>!       }
>!   } else {
>!     tF = clipRange[0] / rayLength;
>!     tB = clipRange[1] / rayLength;
>!     for (i=0; i<3; i++) 
>!       {
>!       p1World[i] = cameraPos[i] + tF*ray[i];
>!       p2World[i] = cameraPos[i] + tB*ray[i];
>!       }
>!   }
>     p1World[3] = p2World[3] = 1.0;
>   
>     // Compute the tolerance in world coordinates.  Do this by 




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