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85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkOpenGLModelViewProjectionMonitor
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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 vtkOpenGLModelViewProjectionMonitor
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* tracks state of OpenGL model-view and projection matrices.
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*
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*
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* vtkOpenGLModelViewProjectionMonitor -- A helper for painters that
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* tracks state of OpenGL model-view and projection matrices. A Painter
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* could use this to skip expensive processing that is only needed when
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* the model-view or projection matrices change.
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*
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* this is not intended to be shared. each object should use it's
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* own instance of this class. it's intended to be called once per
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* render.
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*/
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#ifndef vtkOpenGLModelViewProjectionMonitor_h
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#define vtkOpenGLModelViewProjectionMonitor_h
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#include "vtkRenderingOpenGLModule.h" // for export macro
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#include "vtkObject.h"
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class VTKRENDERINGOPENGL_EXPORT vtkOpenGLModelViewProjectionMonitor : public vtkObject
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{
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public:
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static vtkOpenGLModelViewProjectionMonitor* New();
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vtkTypeMacro(vtkOpenGLModelViewProjectionMonitor, vtkObject);
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void PrintSelf(ostream& os, vtkIndent indent);
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/**
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* Fetches the current GL state and updates the
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* internal copies of the data. returns true if
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* any of the tracked OpenGL matrices have changed.
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* Typically this is the only function a user needs
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* to call.
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*/
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bool StateChanged();
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/**
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* Fetch and store OpenGL model view matrix. Note,
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* this is done automatically in SateChanged.
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*/
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void Update();
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//@{
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/**
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* Set the matrix data.
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*/
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void SetProjection(float *val);
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void SetModelView(float *val);
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//@}
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protected:
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vtkOpenGLModelViewProjectionMonitor() : UpTime(0)
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{ this->Initialize(); }
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~vtkOpenGLModelViewProjectionMonitor(){}
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void Initialize();
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private:
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float Projection[16];
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float ModelView[16];
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long long UpTime;
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private:
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vtkOpenGLModelViewProjectionMonitor(const vtkOpenGLModelViewProjectionMonitor&) VTK_DELETE_FUNCTION;
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void operator=(const vtkOpenGLModelViewProjectionMonitor &) VTK_DELETE_FUNCTION;
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};
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#endif
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