vtkAreaPicker.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkAreaPicker.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 vtkAreaPicker_h
#define vtkAreaPicker_h
 
#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkAbstractPropPicker.h"
 
class vtkRenderer;
class vtkPoints;
class vtkPlanes;
class vtkProp3DCollection;
class vtkAbstractMapper3D;
class vtkDataSet;
class vtkExtractSelectedFrustum;
class vtkProp;
 
class VTKRENDERINGCORE_EXPORT vtkAreaPicker : public vtkAbstractPropPicker
{
public:
  static vtkAreaPicker *New();
  vtkTypeMacro(vtkAreaPicker, vtkAbstractPropPicker);
  void PrintSelf(ostream& os, vtkIndent indent);
 
  void SetPickCoords(double x0, double y0, double x1, double y1);
 
  void SetRenderer(vtkRenderer *);
 
  virtual int Pick();
 
  virtual int AreaPick(double x0, double y0, double x1, double y1, vtkRenderer *renderer = NULL);
 
 
  virtual int Pick(double x0, double y0, double vtkNotUsed(z0), vtkRenderer *renderer = NULL)
    { return this->AreaPick(x0, y0, x0+1.0, y0+1.0, renderer); }
 
 
  vtkGetObjectMacro(Mapper, vtkAbstractMapper3D);
 
 
  vtkGetObjectMacro(DataSet, vtkDataSet);
 
 
  vtkProp3DCollection *GetProp3Ds()
    { return this->Prop3Ds; }
 
 
  vtkGetObjectMacro(Frustum, vtkPlanes);
 
 
  vtkGetObjectMacro(ClipPoints, vtkPoints);
 
protected:
  vtkAreaPicker();
  ~vtkAreaPicker();
 
  virtual void Initialize();
  void DefineFrustum(double x0, double y0, double x1, double y1, vtkRenderer *);
  virtual int PickProps(vtkRenderer *renderer);
  int TypeDecipher(vtkProp *, vtkAbstractMapper3D **);
 
  int ABoxFrustumIsect(double bounds[], double &mindist);
 
  vtkPoints *ClipPoints;
  vtkPlanes *Frustum;
 
  vtkProp3DCollection *Prop3Ds; //candidate actors (based on bounding box)
  vtkAbstractMapper3D *Mapper; //selected mapper (if the prop has a mapper)
  vtkDataSet *DataSet; //selected dataset (if there is one)
 
  //used internally to do prop intersection tests
  vtkExtractSelectedFrustum *FrustumExtractor;
 
  double X0;
  double Y0;
  double X1;
  double Y1;
 
private:
  vtkAreaPicker(const vtkAreaPicker&);  // Not implemented.
  void operator=(const vtkAreaPicker&);  // Not implemented.
};
 
#endif