vtkPolygonalSurfacePointPlacer.h

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

  Program:   Visualization Toolkit
  Module:    vtkPolygonalSurfacePointPlacer.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm 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 vtkPolygonalSurfacePointPlacer_h
#define vtkPolygonalSurfacePointPlacer_h

#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkPolyDataPointPlacer.h"

class vtkPolyDataCollection;
class vtkCellPicker;
class vtkPolygonalSurfacePointPlacerInternals;
class vtkPolyData;

// The Node stores information about the point. This information is used by
// the interpolator. Reusing this information avoids the need for a second
// pick operation to regenerate it. (Cellpickers are slow).
struct vtkPolygonalSurfacePointPlacerNode
{
  double WorldPosition[3];
  double SurfaceWorldPosition[3];
  vtkIdType CellId;
  vtkIdType PointId;
  double ParametricCoords[3]; // parametric coords within cell
  vtkPolyData* PolyData;
};

class VTKINTERACTIONWIDGETS_EXPORT vtkPolygonalSurfacePointPlacer : public vtkPolyDataPointPlacer
{
public:
  static vtkPolygonalSurfacePointPlacer* New();


  vtkTypeMacro(vtkPolygonalSurfacePointPlacer, vtkPolyDataPointPlacer);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  // Descuription:
  // Add /remove a prop, to place points on
  void AddProp(vtkProp*) override;
  void RemoveViewProp(vtkProp* prop) override;
  void RemoveAllProps() override;

  int ComputeWorldPosition(
    vtkRenderer* ren, double displayPos[2], double worldPos[3], double worldOrient[9]) override;

  int ComputeWorldPosition(vtkRenderer* ren, double displayPos[2], double refWorldPos[3],
    double worldPos[3], double worldOrient[9]) override;

  int ValidateWorldPosition(double worldPos[3]) override;

  int UpdateNodeWorldPosition(double worldPos[3], vtkIdType nodePointId) override;

  int ValidateDisplayPosition(vtkRenderer*, double displayPos[2]) override;

  int ValidateWorldPosition(double worldPos[3], double worldOrient[9]) override;


  vtkGetObjectMacro(CellPicker, vtkCellPicker);


  vtkGetObjectMacro(Polys, vtkPolyDataCollection);


  vtkSetMacro(DistanceOffset, double);
  vtkGetMacro(DistanceOffset, double);


  vtkSetMacro(SnapToClosestPoint, vtkTypeBool);
  vtkGetMacro(SnapToClosestPoint, vtkTypeBool);
  vtkBooleanMacro(SnapToClosestPoint, vtkTypeBool);


  typedef vtkPolygonalSurfacePointPlacerNode Node;
  Node* GetNodeAtWorldPosition(double worldPos[3]);

protected:
  vtkPolygonalSurfacePointPlacer();
  ~vtkPolygonalSurfacePointPlacer() override;

  // The props that represents the terrain data (one or more) in a rendered
  // scene
  vtkCellPicker* CellPicker;
  vtkPolyDataCollection* Polys;
  vtkPolygonalSurfacePointPlacerInternals* Internals;
  double DistanceOffset;
  vtkTypeBool SnapToClosestPoint;

private:
  vtkPolygonalSurfacePointPlacer(const vtkPolygonalSurfacePointPlacer&) = delete;
  void operator=(const vtkPolygonalSurfacePointPlacer&) = delete;
};

#endif