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/*=========================================================================
Program: Visualization Toolkit
Module: vtkHiddenLineRemovalPass.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 "vtk_glew.h"
#include "vtkHiddenLineRemovalPass.h"
#include "vtkActor.h"
#include "vtkMapper.h"
#include "vtkObjectFactory.h"
#include "vtkOpenGLError.h"
#include "vtkProp.h"
#include "vtkProperty.h"
#include "vtkRenderer.h"
#include "vtkRenderState.h"
#include <string>
// Define to print debug statements to the OpenGL CS stream (useful for e.g.
// apitrace debugging):
//#define ANNOTATE_STREAM
namespace
{
void annotate(const std::string &str)
{
#ifdef ANNOTATE_STREAM
vtkOpenGLStaticCheckErrorMacro("Error before glDebug.")
glDebugMessageInsert(GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_OTHER,
GL_DEBUG_SEVERITY_NOTIFICATION,
0, str.size(), str.c_str());
vtkOpenGLClearErrorMacro();
#else // ANNOTATE_STREAM
(void)str;
#endif // ANNOTATE_STREAM
}
}
vtkStandardNewMacro(vtkHiddenLineRemovalPass)
//------------------------------------------------------------------------------
void vtkHiddenLineRemovalPass::PrintSelf(std::ostream &os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------------
void vtkHiddenLineRemovalPass::Render(const vtkRenderState *s)
{
this->NumberOfRenderedProps = 0;
// Separate the wireframe props from the others:
std::vector<vtkProp*> wireframeProps;
std::vector<vtkProp*> otherProps;
for (int i = 0; i < s->GetPropArrayCount(); ++i)
{
bool isWireframe = false;
vtkProp *prop = s->GetPropArray()[i];
vtkActor *actor = vtkActor::SafeDownCast(prop);
if (actor)
{
vtkProperty *property = actor->GetProperty();
if (property->GetRepresentation() == VTK_WIREFRAME)
{
isWireframe = true;
}
}
if (isWireframe)
{
wireframeProps.push_back(prop);
}
else
{
otherProps.push_back(prop);
}
}
vtkViewport *vp = s->GetRenderer();
// Render the non-wireframe geometry as normal:
annotate("Rendering non-wireframe props.");
this->NumberOfRenderedProps = this->RenderProps(otherProps, vp);
vtkOpenGLStaticCheckErrorMacro("Error after non-wireframe geometry.");
// Store the coincident topology parameters -- we want to force polygon
// offset to keep the drawn lines sharp:
int ctMode = vtkMapper::GetResolveCoincidentTopology();
double ctFactor, ctUnits;
vtkMapper::GetResolveCoincidentTopologyPolygonOffsetParameters(ctFactor,
ctUnits);
vtkMapper::SetResolveCoincidentTopology(VTK_RESOLVE_POLYGON_OFFSET);
vtkMapper::SetResolveCoincidentTopologyPolygonOffsetParameters(2.0, 2.0);
// Draw the wireframe props as surfaces into the depth buffer only:
annotate("Rendering wireframe prop surfaces.");
this->SetRepresentation(wireframeProps, VTK_SURFACE);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
this->RenderProps(wireframeProps, vp);
vtkOpenGLStaticCheckErrorMacro("Error after wireframe surface rendering.");
// Now draw the wireframes as normal:
annotate("Rendering wireframes.");
this->SetRepresentation(wireframeProps, VTK_WIREFRAME);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
this->NumberOfRenderedProps = this->RenderProps(wireframeProps, vp);
vtkOpenGLStaticCheckErrorMacro("Error after wireframe rendering.");
// Restore the previous coincident topology parameters:
vtkMapper::SetResolveCoincidentTopology(ctMode);
vtkMapper::SetResolveCoincidentTopologyPolygonOffsetParameters(ctFactor,
ctUnits);
}
//------------------------------------------------------------------------------
bool vtkHiddenLineRemovalPass::WireframePropsExist(vtkProp **propArray,
int nProps)
{
for (int i = 0; i < nProps; ++i)
{
vtkActor *actor = vtkActor::SafeDownCast(propArray[i]);
if (actor)
{
vtkProperty *property = actor->GetProperty();
if (property->GetRepresentation() == VTK_WIREFRAME)
{
return true;
}
}
}
return false;
}
//------------------------------------------------------------------------------
vtkHiddenLineRemovalPass::vtkHiddenLineRemovalPass()
{
}
//------------------------------------------------------------------------------
vtkHiddenLineRemovalPass::~vtkHiddenLineRemovalPass()
{
}
//------------------------------------------------------------------------------
void vtkHiddenLineRemovalPass::SetRepresentation(std::vector<vtkProp *> &props,
int repr)
{
for (std::vector<vtkProp*>::iterator it = props.begin(), itEnd = props.end();
it != itEnd; ++it)
{
vtkActor *actor = vtkActor::SafeDownCast(*it);
if (actor)
{
actor->GetProperty()->SetRepresentation(repr);
}
}
}
//------------------------------------------------------------------------------
int vtkHiddenLineRemovalPass::RenderProps(std::vector<vtkProp *> &props,
vtkViewport *vp)
{
int propsRendered = 0;
for (std::vector<vtkProp*>::iterator it = props.begin(), itEnd = props.end();
it != itEnd; ++it)
{
propsRendered += (*it)->RenderOpaqueGeometry(vp);
}
return propsRendered;
}
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