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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOpenGLPropItem.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 vtkOpenGLPropItem
* @brief Sync Context2D state with vtk camera.
*
*
* The vtkContext2D framework modifies the GL state directly, while some actors
* and mappers rely on the modelview/projection matrices from vtkCamera. This
* class is a layer between the two that updates the camera with the current
* OpenGL state.
*/
#ifndef vtkOpenGLPropItem_h
#define vtkOpenGLPropItem_h
#include "vtkNew.h" // for vtkNew
#include "vtkPropItem.h"
#include "vtkRenderingContextOpenGL2Module.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class vtkCamera;
class VTKRENDERINGCONTEXTOPENGL2_EXPORT vtkOpenGLPropItem : public vtkPropItem
{
public:
static vtkOpenGLPropItem* New();
vtkTypeMacro(vtkOpenGLPropItem, vtkPropItem);
void PrintSelf(ostream& os, vtkIndent indent) override;
bool Paint(vtkContext2D* painter) override;
protected:
vtkOpenGLPropItem();
~vtkOpenGLPropItem() override;
// Sync the active vtkCamera with the GL state set by the painter.
void UpdateTransforms() override;
// Restore the vtkCamera state.
void ResetTransforms() override;
private:
vtkNew<vtkCamera> CameraCache;
vtkContext2D* Painter;
vtkOpenGLPropItem(const vtkOpenGLPropItem&) = delete;
void operator=(const vtkOpenGLPropItem&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif // vtkOpenGLPropItem_h
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