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/**************************************************************************\
*
* This file is part of the Coin 3D visualization library.
* Copyright (C) by Kongsberg Oil & Gas Technologies.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* ("GPL") version 2 as published by the Free Software Foundation.
* See the file LICENSE.GPL at the root directory of this source
* distribution for additional information about the GNU GPL.
*
* For using Coin with software that can not be combined with the GNU
* GPL, and for taking advantage of the additional benefits of our
* support services, please contact Kongsberg Oil & Gas Technologies
* about acquiring a Coin Professional Edition License.
*
* See http://www.coin3d.org/ for more information.
*
* Kongsberg Oil & Gas Technologies, Bygdoy Alle 5, 0257 Oslo, NORWAY.
* http://www.sim.no/ sales@sim.no coin-support@coin3d.org
*
\**************************************************************************/
/*!
\class SoAnnotation SoAnnotation.h Inventor/nodes/SoAnnotation.h
\brief The SoAnnotation node draws all its child geometry on top of other geometry.
\ingroup nodes
This group-type node uses delayed rendering in combination with
Z-buffer disabling to let its children transparently render their
geometry on top of the other geometry in the scene.
Since the Z-buffer needs to be disabled, the childrens' geometry
will not be rendered back-to-front sorted, but rather in the order
they are present in the scenegraph.
<b>FILE FORMAT/DEFAULTS:</b>
\code
Annotation {
renderCaching AUTO
boundingBoxCaching AUTO
renderCulling AUTO
pickCulling AUTO
}
\endcode
*/
// FIXME: consider adding a lazy GL depth buffer element. 200YMMDD pederb.
#include <Inventor/nodes/SoAnnotation.h>
#include <Inventor/elements/SoCacheElement.h>
#include <Inventor/actions/SoGLRenderAction.h>
#include <Inventor/system/gl.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif // HAVE_CONFIG_H
#include "nodes/SoSubNodeP.h"
SO_NODE_SOURCE(SoAnnotation);
/*!
Constructor.
*/
SoAnnotation::SoAnnotation()
{
SO_NODE_INTERNAL_CONSTRUCTOR(SoAnnotation);
}
/*!
Destructor.
*/
SoAnnotation::~SoAnnotation()
{
}
// Doc in superclass.
void
SoAnnotation::initClass(void)
{
SO_NODE_INTERNAL_INIT_CLASS(SoAnnotation, SO_FROM_INVENTOR_1);
}
// Doc in superclass.
void
SoAnnotation::GLRender(SoGLRenderAction * action)
{
switch (action->getCurPathCode()) {
case SoAction::NO_PATH:
case SoAction::BELOW_PATH:
this->GLRenderBelowPath(action);
break;
case SoAction::OFF_PATH:
// do nothing. Separator will reset state.
break;
case SoAction::IN_PATH:
this->GLRenderInPath(action);
break;
}
}
// Doc in superclass.
void
SoAnnotation::GLRenderBelowPath(SoGLRenderAction * action)
{
if (action->isRenderingDelayedPaths()) {
SbBool zbenabled = glIsEnabled(GL_DEPTH_TEST);
if (zbenabled) glDisable(GL_DEPTH_TEST);
inherited::GLRenderBelowPath(action);
if (zbenabled) glEnable(GL_DEPTH_TEST);
}
else {
SoCacheElement::invalidate(action->getState());
action->addDelayedPath(action->getCurPath()->copy());
}
}
// Doc in superclass.
void
SoAnnotation::GLRenderInPath(SoGLRenderAction * action)
{
if (action->isRenderingDelayedPaths()) {
SbBool zbenabled = glIsEnabled(GL_DEPTH_TEST);
if (zbenabled) glDisable(GL_DEPTH_TEST);
inherited::GLRenderInPath(action);
if (zbenabled) glEnable(GL_DEPTH_TEST);
}
else {
SoCacheElement::invalidate(action->getState());
action->addDelayedPath(action->getCurPath()->copy());
}
}
// Doc in superclass.
void
SoAnnotation::GLRenderOffPath(SoGLRenderAction *)
{
// should never render, this is a separator node
}
#ifdef COIN_TEST_SUITE
BOOST_AUTO_TEST_CASE(initialized)
{
SoAnnotation * node = new SoAnnotation;
assert(node);
node->ref();
BOOST_CHECK_MESSAGE(node->getTypeId() != SoType::badType(),
"missing class initialization");
node->unref();
}
#endif // COIN_TEST_SUITE
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