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64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkRenderedAreaPicker.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkRenderedAreaPicker
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* @brief Uses graphics hardware to picks props behind
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* a selection rectangle on a viewport.
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*
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*
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* Like vtkAreaPicker, this class picks all props within a selection area
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* on the screen. The difference is in implementation. This class uses
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* graphics hardware to perform the test where the other uses software
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* bounding box/frustum intersection testing.
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*
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* This picker is more conservative than vtkAreaPicker. It will reject
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* some objects that pass the bounding box test of vtkAreaPicker. This
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* will happen, for instance, when picking through a corner of the bounding
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* box when the data set does not have any visible geometry in that corner.
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*/
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#ifndef vtkRenderedAreaPicker_h
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#define vtkRenderedAreaPicker_h
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#include "vtkAreaPicker.h"
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#include "vtkRenderingCoreModule.h" // For export macro
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class vtkRenderer;
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class VTKRENDERINGCORE_EXPORT vtkRenderedAreaPicker : public vtkAreaPicker
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{
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public:
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static vtkRenderedAreaPicker* New();
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vtkTypeMacro(vtkRenderedAreaPicker, vtkAreaPicker);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Perform pick operation in volume behind the given screen coordinates.
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* Props intersecting the selection frustum will be accessible via GetProp3D.
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* GetPlanes returns a vtkImplicitFunction suitable for vtkExtractGeometry.
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*/
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int AreaPick(double x0, double y0, double x1, double y1, vtkRenderer*) override;
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protected:
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vtkRenderedAreaPicker();
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~vtkRenderedAreaPicker() override;
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private:
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vtkRenderedAreaPicker(const vtkRenderedAreaPicker&) = delete;
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void operator=(const vtkRenderedAreaPicker&) = delete;
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};
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#endif
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