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/*=========================================================================
Program: Visualization Toolkit
Module: vtkClearZPass.cxx
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 "vtkClearZPass.h"
#include "vtkObjectFactory.h"
#include <cassert>
#include "vtkRenderState.h"
#include "vtkRenderer.h"
#include "vtk_glew.h"
vtkStandardNewMacro(vtkClearZPass);
// ----------------------------------------------------------------------------
vtkClearZPass::vtkClearZPass()
{
this->Depth=1.0;
}
// ----------------------------------------------------------------------------
vtkClearZPass::~vtkClearZPass()
{
}
// ----------------------------------------------------------------------------
void vtkClearZPass::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Depth:" << this->Depth << endl;
}
// ----------------------------------------------------------------------------
// Description:
// Perform rendering according to a render state \p s.
// \pre s_exists: s!=0
void vtkClearZPass::Render(const vtkRenderState *s)
{
assert("pre: s_exists" && s!=0);
(void)s;
this->NumberOfRenderedProps=0;
glDepthMask(GL_TRUE);
#if GL_ES_VERSION_2_0 != 1
glClearDepth(this->Depth);
#else
glClearDepthf(static_cast<GLclampf>(this->Depth));
#endif
glClear(GL_DEPTH_BUFFER_BIT);
}
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