fixed problems with specularities

src/vtkSbrCamera.cc

@@ -67,6 +67,7 @@ void vtkSbrCamera::Render(vtkCamera *cam, vtkSbrRenderer *ren)
   float vdc_vals[6];
   fd = ren->GetFd();
   vtkMatrix4x4 matrix;
+  float *pos;
   
   // get the background color
   background = ren->GetBackground();
@@ -183,5 +184,8 @@ void vtkSbrCamera::Render(vtkCamera *cam, vtkSbrRenderer *ren)
   // insert model transformation 
   view_matrix3d(fd, (float (*)[4])(matrix[0]),REPLACE_VW);
   
+  pos = cam->GetPosition();
+  viewpoint(fd,POSITIONAL,pos[0],pos[1],pos[2]);
+  
   clip_depth(fd,0.0,1.0);
 }