vtkSMRenderViewProxy.h

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

  Program:   ParaView
  Module:    vtkSMRenderViewProxy.h

  Copyright (c) Kitware, Inc.
  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.

=========================================================================*/
#ifndef vtkSMRenderViewProxy_h
#define vtkSMRenderViewProxy_h

#include "vtkNew.h"                 // needed for vtkInteractorObserver.
#include "vtkRemotingViewsModule.h" //needed for exports
#include "vtkSMViewProxy.h"
class vtkCamera;
class vtkCollection;
class vtkFloatArray;
class vtkIntArray;
class vtkRenderer;
class vtkRenderWindow;
class vtkSMViewProxyInteractorHelper;

class VTKREMOTINGVIEWS_EXPORT vtkSMRenderViewProxy : public vtkSMViewProxy
{
public:
  static vtkSMRenderViewProxy* New();
  vtkTypeMacro(vtkSMRenderViewProxy, vtkSMViewProxy);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  bool SelectSurfaceCells(const int region[4], vtkCollection* selectedRepresentations,
    vtkCollection* selectionSources, bool multiple_selections = false,
    int modifier = /* replace */ 0, bool select_blocks = false, const char* arrayName = nullptr);
  bool SelectSurfacePoints(const int region[4], vtkCollection* selectedRepresentations,
    vtkCollection* selectionSources, bool multiple_selections = false,
    int modifier = /* replace */ 0, bool select_blocks = false, const char* arrayName = nullptr);
  bool SelectFrustumCells(const int region[4], vtkCollection* selectedRepresentations,
    vtkCollection* selectionSources, bool multiple_selections = false);
  bool SelectFrustumPoints(const int region[4], vtkCollection* selectedRepresentations,
    vtkCollection* selectionSources, bool multiple_selections = false);
  bool SelectPolygonPoints(vtkIntArray* polygon, vtkCollection* selectedRepresentations,
    vtkCollection* selectionSources, bool multiple_selections = false, int modifier = 0,
    bool selectBlocks = false);
  bool SelectPolygonCells(vtkIntArray* polygon, vtkCollection* selectedRepresentations,
    vtkCollection* selectionSources, bool multiple_selections = false, int modifier = 0,
    bool selectBlocks = false);


  bool ComputeVisibleScalarRange(const int region[4], int fieldAssociation, const char* scalarName,
    int component, double range[]);
  bool ComputeVisibleScalarRange(
    int fieldAssociation, const char* scalarName, int component, double range[]);

  vtkSMRepresentationProxy* Pick(int x, int y);

  vtkSMRepresentationProxy* PickBlock(int x, int y, unsigned int& flatIndex, int& rank);

  bool ConvertDisplayToPointOnSurface(const int display_position[2], double world_position[3],
    double world_normal[3], bool snapOnMeshPoint = false);

  virtual bool IsSelectionAvailable();


  void ResetCamera(bool closest = false);
  void ResetCamera(double bounds[6], bool closest = false);
  void ResetCamera(double xmin, double xmax, double ymin, double ymax, double zmin, double zmax,
    bool closest = false);

  virtual void ZoomTo(vtkSMProxy* representation, bool closest = false);


  virtual const char* IsSelectVisibleCellsAvailable();
  virtual const char* IsSelectVisiblePointsAvailable();

  void SetupInteractor(vtkRenderWindowInteractor* iren) override;

  vtkRenderWindowInteractor* GetInteractor() override;

  vtkRenderer* GetRenderer();

  enum class CameraAdjustmentType : int
  {
    Roll = 0,
    Elevation,
    Azimuth,
    Zoom
  };

  vtkCamera* GetActiveCamera();
  void AdjustActiveCamera(const CameraAdjustmentType&, const double&);
  void AdjustActiveCamera(const int&, const double&);
  void AdjustAzimuth(const double& value);
  void AdjustElevation(const double& value);
  void AdjustRoll(const double& value);
  void AdjustZoom(const double& value);
  void ApplyIsometricView();
  void ResetActiveCameraToDirection(const double& look_x, const double& look_y,
    const double& look_z, const double& up_x, const double& up_y, const double& up_z);
  void ResetActiveCameraToPositiveX();
  void ResetActiveCameraToNegativeX();
  void ResetActiveCameraToPositiveY();
  void ResetActiveCameraToNegativeY();
  void ResetActiveCameraToPositiveZ();
  void ResetActiveCameraToNegativeZ();

  void SynchronizeCameraProperties();

  virtual bool LastRenderWasInteractive();

  void Update() override;

  bool GetNeedsUpdate() override;

  bool StreamingUpdate(bool render_if_needed);

  const char* GetRepresentationType(vtkSMSourceProxy* producer, int outputPort) override;

  vtkRenderWindow* GetRenderWindow() override;

  vtkSMViewProxyInteractorHelper* GetInteractorHelper();

  vtkFloatArray* CaptureDepthBuffer();

protected:
  vtkSMRenderViewProxy();
  ~vtkSMRenderViewProxy() override;

  void RenderForImageCapture() override;

  void UpdateLOD();

  void MarkDirty(vtkSMProxy* modifiedProxy) override;

  bool SelectFrustumInternal(const int region[4], vtkCollection* selectedRepresentations,
    vtkCollection* selectionSources, bool multiple_selections, int fieldAssociation);
  bool SelectPolygonInternal(vtkIntArray* polygon, vtkCollection* selectedRepresentations,
    vtkCollection* selectionSources, bool multiple_selections, int fieldAssociation, int modifier,
    bool selectBlocks);

  vtkTypeUInt32 PreRender(bool interactive) override;
  void PostRender(bool interactive) override;

  bool FetchLastSelection(bool multiple_selections, vtkCollection* selectedRepresentations,
    vtkCollection* selectionSources, int modifier, bool selectBlocks);

  void CreateVTKObjects() override;

  bool IsInSelectionMode();

  bool IsSelectionCached;

  bool ClearSelectionCache(bool force = false);

  // Internal fields for the observer mechanism that is used to invalidate
  // the cache of selection when the current user became master
  unsigned long NewMasterObserverId;
  void NewMasterCallback(vtkObject* src, unsigned long event, void* data);

  bool NeedsUpdateLOD;

private:
  vtkSMRenderViewProxy(const vtkSMRenderViewProxy&) = delete;
  void operator=(const vtkSMRenderViewProxy&) = delete;

  bool SelectInternal(const vtkClientServerStream& cmd, vtkCollection* selectedRepresentations,
    vtkCollection* selectionSources, bool multiple_selections, int modifier = /* replace */ 0,
    bool selectBlocks = false);

  vtkNew<vtkSMViewProxyInteractorHelper> InteractorHelper;
};

#endif