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/*=========================================================================
Program: Visualization Toolkit
Module: vtkRenderedAreaPicker.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.
=========================================================================*/
/**
* @class vtkRenderedAreaPicker
* @brief Uses graphics hardware to picks props behind
* a selection rectangle on a viewport.
*
*
* Like vtkAreaPicker, this class picks all props within a selection area
* on the screen. The difference is in implementation. This class uses
* graphics hardware to perform the test where the other uses software
* bounding box/frustum intersection testing.
*
* This picker is more conservative than vtkAreaPicker. It will reject
* some objects that pass the bounding box test of vtkAreaPicker. This
* will happen, for instance, when picking through a corner of the bounding
* box when the data set does not have any visible geometry in that corner.
*/
#ifndef vtkRenderedAreaPicker_h
#define vtkRenderedAreaPicker_h
#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkAreaPicker.h"
class vtkRenderer;
class VTKRENDERINGCORE_EXPORT vtkRenderedAreaPicker : public vtkAreaPicker
{
public:
static vtkRenderedAreaPicker *New();
vtkTypeMacro(vtkRenderedAreaPicker, vtkAreaPicker);
void PrintSelf(ostream& os, vtkIndent indent);
/**
* Perform pick operation in volume behind the given screen coordinates.
* Props intersecting the selection frustum will be accessible via GetProp3D.
* GetPlanes returns a vtkImplicitFunciton suitable for vtkExtractGeometry.
*/
virtual int AreaPick(double x0, double y0, double x1, double y1, vtkRenderer *);
protected:
vtkRenderedAreaPicker();
~vtkRenderedAreaPicker();
private:
vtkRenderedAreaPicker(const vtkRenderedAreaPicker&) VTK_DELETE_FUNCTION;
void operator=(const vtkRenderedAreaPicker&) VTK_DELETE_FUNCTION;
};
#endif
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