SoPickAction.h

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**=======================================================================*/
/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
** Modified by : Nick Thompson (MMM yyyy)
**=======================================================================*/
/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_PICK_ACTION_
#define  _SO_PICK_ACTION_
 
#include <Inventor/SbViewportRegion.h>
#include <Inventor/actions/SoSubAction.h>
 
//
//  Class: SoPickAction
//
//  Base class for picking actions.
//
 
class  SoPickAction : public SoAction {
 
  SO_ACTION_HEADER(SoPickAction);
 
 public:
  void                setViewportRegion(const SbViewportRegion &newRegion);
 
  const SbViewportRegion &getViewportRegion() const   { return vpRegion; }
 
 SoEXTENDER_Documented public:
  // Setting this flag to FALSE disables any pick culling that might
  // take place (as in SoSeparators). This can be used for nodes
  // (such as SoArray and SoMultipleCopy) that traverse their
  // children multiple times in different locations, thereby
  // avoiding computing bounding boxes each time. (This problem is
  // very severe when each bounding box traversal also traverses the
  // children N times.) The default setting is TRUE.
  void                enableCulling(SbBool flag)      { culling = flag; }
  SbBool              isCullingEnabled() const        { return culling; }
 
 private:
  static void         initClass();
  static void         exitClass();
 
 private:
  SbViewportRegion    vpRegion;       // Current viewport region
 
  // Constructor takes viewport region. See comments for the
  // setViewportRegion() method.
  SoPickAction(const SbViewportRegion &viewportRegion);
 
  // Destructor
  virtual ~SoPickAction();
 
  // Initiates action on graph
  virtual void        beginTraversal(SoNode *node);
 
 private:
  SbBool              culling;        // Pick culling enabled?
 
};
 
#endif /* _SO_PICK_ACTION_ */