[vtkusers] vtkOrientedGlyphContourRepresentation AlwaysOnTop

[ysa0829]

Hi all,

in vtk 5.10 , I use the flag called  "AlwaysOnTop" to keep contour always
show on top.

but in vtk 6.1 , the flag does not work.

I found out the flag is not valid .

vtk 5.10:
//==============================================//
int vtkOrientedGlyphContourRepresentation::RenderOpaqueGeometry(
  vtkViewport *viewport)
{
  // Since we know RenderOpaqueGeometry gets called first, will do the
  // build here
  this->BuildRepresentation();
  
  GLboolean flag = GL_FALSE;
  if ( this->AlwaysOnTop 
      && (this->ActiveActor->GetVisibility() ||
          this->LinesActor->GetVisibility()))
    {
    glGetBooleanv(GL_DEPTH_TEST,&flag);
    if(flag)
      {
      glDisable( GL_DEPTH_TEST );
      }
    }

  int count=0;
  count += this->LinesActor->RenderOpaqueGeometry(viewport);
  if ( this->Actor->GetVisibility() )
    {
    count += this->Actor->RenderOpaqueGeometry(viewport);
    }
  if ( this->ActiveActor->GetVisibility() )
    {
    count += this->ActiveActor->RenderOpaqueGeometry(viewport);
    }
  if(this->ShowSelectedNodes && this->SelectedNodesActor &&
      this->SelectedNodesActor->GetVisibility())
    {
    count += this->SelectedNodesActor->RenderOpaqueGeometry(viewport);
    }

  if(flag && this->AlwaysOnTop
          && (this->ActiveActor->GetVisibility() ||
              this->LinesActor->GetVisibility()))
    {
    glEnable( GL_DEPTH_TEST );
    }
    
  return count;
}
//==============================================//

vtk6.1 :

int vtkOrientedGlyphContourRepresentation::RenderOpaqueGeometry(
  vtkViewport *viewport)
{
  // Since we know RenderOpaqueGeometry gets called first, will do the
  // build here
  this->BuildRepresentation();

  int count=0;
  count += this->LinesActor->RenderOpaqueGeometry(viewport);
  if ( this->Actor->GetVisibility() )
    {
    count += this->Actor->RenderOpaqueGeometry(viewport);
    }
  if ( this->ActiveActor->GetVisibility() )
    {
    count += this->ActiveActor->RenderOpaqueGeometry(viewport);
    }
  if(this->ShowSelectedNodes && this->SelectedNodesActor &&
      this->SelectedNodesActor->GetVisibility())
    {
    count += this->SelectedNodesActor->RenderOpaqueGeometry(viewport);
    }

  return count;
}

Could anyone give me some suggestions , If I want to show contour on top?






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