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Rendering/vtkAbstractPicker.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkAbstractPicker.h,v $
00005   Language:  C++
00006 
00007   Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
00008   All rights reserved.
00009   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00010 
00011      This software is distributed WITHOUT ANY WARRANTY; without even 
00012      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00013      PURPOSE.  See the above copyright notice for more information.
00014 
00015 =========================================================================*/
00061 #ifndef __vtkAbstractPicker_h
00062 #define __vtkAbstractPicker_h
00063 
00064 #include "vtkObject.h"
00065 
00066 class vtkRenderer;
00067 class vtkProp;
00068 class vtkPropCollection;
00069 
00070 class VTK_RENDERING_EXPORT vtkAbstractPicker : public vtkObject
00071 {
00072 public:
00073   vtkTypeRevisionMacro(vtkAbstractPicker,vtkObject);
00074   void PrintSelf(ostream& os, vtkIndent indent);
00075 
00077 
00078   vtkGetObjectMacro(Renderer,vtkRenderer);
00080 
00082 
00084   vtkGetVectorMacro(SelectionPoint,float,3);
00086 
00088 
00089   vtkGetVectorMacro(PickPosition,float,3);
00091 
00093 
00097   virtual int Pick(float selectionX, float selectionY, float selectionZ, 
00098                    vtkRenderer *renderer) = 0;
00100 
00102 
00105   int Pick(float selectionPt[3], vtkRenderer *ren)
00106     {return this->Pick(selectionPt[0],selectionPt[1],selectionPt[2],ren);};  
00108 
00110   void SetStartPickMethod(void (*f)(void *), void *arg);
00111 
00113   void SetPickMethod(void (*f)(void *), void *arg);
00114 
00117   void SetEndPickMethod(void (*f)(void *), void *arg);
00118 
00120   void SetStartPickMethodArgDelete(void (*f)(void *));
00121 
00123   void SetPickMethodArgDelete(void (*f)(void *));
00124 
00126   void SetEndPickMethodArgDelete(void (*f)(void *));
00127 
00129 
00132   vtkSetMacro(PickFromList,int);
00133   vtkGetMacro(PickFromList,int);
00134   vtkBooleanMacro(PickFromList,int);
00136 
00138   void InitializePickList();
00139 
00141   void AddPickList(vtkProp *);
00142 
00144   void DeletePickList(vtkProp *);
00145   
00147   vtkPropCollection *GetPickList() {return this->PickList;}
00148 
00149 protected:
00150   vtkAbstractPicker();
00151   ~vtkAbstractPicker();
00152 
00153   virtual void Initialize();
00154 
00155   vtkRenderer *Renderer; //pick occurred in this renderer's viewport
00156   float SelectionPoint[3]; //selection point in window (pixel) coordinates
00157   float PickPosition[3]; //selection point in world coordinates
00158   
00159   // the following are used to manage invocation of pick methods
00160   unsigned long StartPickTag;
00161   unsigned long PickTag;
00162   unsigned long EndPickTag;
00163   
00164   // use the following to control picking from a list
00165   int PickFromList;
00166   vtkPropCollection *PickList;
00167 private:
00168   vtkAbstractPicker(const vtkAbstractPicker&);  // Not implemented.
00169   void operator=(const vtkAbstractPicker&);  // Not implemented.
00170 };
00171 
00172 #endif
00173 
00174