Zoom closest to data

vishalkumar2222 · April 27, 2023, 7:33pm

Hi Guys,
I want to implement zoom closest to data. Similar like the one which there in Para view.

Thanks in advance,

Paulo_Carvalho · May 3, 2023, 12:50pm

Hello,

I’d take a look at Paraview code:

Kitware/ParaView/blob/9638c6477de1346ddf7971a5d70172afac47d3c0/Qt/ApplicationComponents/pqCameraReaction.cxx#L235


      
          void pqCameraReaction::resetNegativeZ()
          {
            pqRenderView* ren = qobject_cast<pqRenderView*>(pqActiveObjects::instance().activeView());
            if (ren)
            {
              ren->resetViewDirectionToNegativeZ();
            }
          }
          
          
//-----------------------------------------------------------------------------
          void pqCameraReaction::zoomToData(bool closest)
          {
            pqRenderView* renModule = qobject_cast<pqRenderView*>(pqActiveObjects::instance().activeView());
            pqPipelineRepresentation* repr =
              qobject_cast<pqPipelineRepresentation*>(pqActiveObjects::instance().activeRepresentation());
            if (renModule && repr)
            {
              vtkSMRenderViewProxy* rm = renModule->getRenderViewProxy();
              rm->ZoomTo(repr->getProxy(), closest,
                vtkPVRenderViewSettings::GetInstance()->GetZoomClosestOffsetRatio());
              renModule->render();

Which make calls to the following class:

github.com

Kitware/ParaView/blob/9638c6477de1346ddf7971a5d70172afac47d3c0/Remoting/Views/vtkSMRenderViewProxy.cxx

/*=========================================================================

  Program:   ParaView
  Module:    vtkSMRenderViewProxy.cxx

  Copyright (c) Kitware, Inc.
  Copyright (c) 2017, NVIDIA CORPORATION.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#include "vtkSMRenderViewProxy.h"

#include "vtkBoundingBox.h"
#include "vtkCamera.h"
#include "vtkClientServerStream.h"

This file has been truncated. show original

take care,

Paulo

vishalkumar2222 · May 6, 2023, 6:01pm

Thanks, I got it working.