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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOpenGLModelViewProjectionMonitor
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.
=========================================================================*/
#include "vtkOpenGLModelViewProjectionMonitor.h"
#include "vtkObjectFactory.h"
#include "vtkgl.h"
#include <cstring>
#include <cmath>
//-----------------------------------------------------------------------------
vtkStandardNewMacro(vtkOpenGLModelViewProjectionMonitor)
//-----------------------------------------------------------------------------
void vtkOpenGLModelViewProjectionMonitor::Initialize()
{
memset(this->Projection,0,16*sizeof(float));
memset(this->ModelView,0,16*sizeof(float));
}
//-----------------------------------------------------------------------------
#define vtkOpenGLModelViewProjectionMonitorSetVectorMacro(_name, _n) \
void vtkOpenGLModelViewProjectionMonitor::Set##_name(float *val) \
{ \
int changed = 0; \
for (int i=0; i<_n; ++i) \
{ \
if ( fabs( val[i] - this->_name[i] ) > 1e-5f ) \
{ \
changed=1; \
this->_name[i] = val[i]; \
} \
} \
if ( changed ) \
{ \
this->UpTime += 1; \
} \
}
vtkOpenGLModelViewProjectionMonitorSetVectorMacro(Projection, 16)
vtkOpenGLModelViewProjectionMonitorSetVectorMacro(ModelView, 16)
//-----------------------------------------------------------------------------
void vtkOpenGLModelViewProjectionMonitor::Update()
{
GLfloat matrix[16];
glGetFloatv(GL_PROJECTION_MATRIX, matrix);
this->SetProjection(matrix);
glGetFloatv(GL_MODELVIEW_MATRIX, matrix);
this->SetModelView(matrix);
}
//-----------------------------------------------------------------------------
bool vtkOpenGLModelViewProjectionMonitor::StateChanged()
{
long long oldUpTime = this->UpTime;
this->Update();
return (this->UpTime != oldUpTime);
}
//-----------------------------------------------------------------------------
void vtkOpenGLModelViewProjectionMonitor::PrintSelf(ostream &os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Projection=";
for (int q=0; q<16; ++q)
{
os << this->Projection[q] << " ";
}
os << endl;
os << indent << "ModelView=";
for (int q=0; q<16; ++q)
{
os << this->ModelView[q] << " ";
}
os << endl;
os << indent << "UpTime=" << this->UpTime << endl;
}
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