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Gui: Fix rendering order of transorm gizmo

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Transform gizmo (dragger) used SoAnnotation which disables GL_DEPTH_TEST
resulting in rendering elements in wrong order. This PR introduces new
coin node: So3DAnnotation that delays rendering and clears depth buffer before
drawing which results in proper order of elements. As this destroys
information in the depth buffer it is crucial to run this action after
the scene is rendered.
This commit is contained in:
Kacper Donat
2024-05-26 22:39:26 +02:00
committed by Chris Hennes
parent 309dd6e30d
commit 10ec35abeb
6 changed files with 158 additions and 1 deletions
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90
src/Gui/So3DAnnotation.cpp Normal file
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/***************************************************************************
* Copyright (c) 2024 Kacper Donat <kacper@kadet.net> *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; see the file COPYING.LIB. If not, *
* write to the Free Software Foundation, Inc., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#include "PreCompiled.h"
#ifndef _PreComp_
#include <QtOpenGL>
#include <Inventor/elements/SoCacheElement.h>
#endif
#include "SoFCDB.h"
#include "So3DAnnotation.h"
using namespace Gui;
SO_NODE_SOURCE(So3DAnnotation);
So3DAnnotation::So3DAnnotation()
{
SO_NODE_CONSTRUCTOR(So3DAnnotation);
}
void So3DAnnotation::initClass()
{
SO_NODE_INIT_CLASS(So3DAnnotation, SoSeparator, "3DAnnotation");
}
void So3DAnnotation::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;
}
}
void So3DAnnotation::GLRenderBelowPath(SoGLRenderAction* action)
{
if (action->isRenderingDelayedPaths()) {
glClear(GL_DEPTH_BUFFER_BIT);
inherited::GLRenderBelowPath(action);
}
else {
SoCacheElement::invalidate(action->getState());
action->addDelayedPath(action->getCurPath()->copy());
}
}
void So3DAnnotation::GLRenderInPath(SoGLRenderAction* action)
{
if (action->isRenderingDelayedPaths()) {
glClear(GL_DEPTH_BUFFER_BIT);
inherited::GLRenderInPath(action);
}
else {
SoCacheElement::invalidate(action->getState());
action->addDelayedPath(action->getCurPath()->copy());
}
}
void So3DAnnotation::GLRenderOffPath(SoGLRenderAction* /* action */)
{
// should never render, this is a separator node
}