FreeCAD

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/***************************************************************************
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 *   Copyright (c) 2024 Kacper Donat <kacper@kadet.net>                    *
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 *                                                                         *
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 *   This file is part of the FreeCAD CAx development system.              *
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 *                                                                         *
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 *   This library is free software; you can redistribute it and/or         *
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 *   modify it under the terms of the GNU Library General Public           *
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 *   License as published by the Free Software Foundation; either          *
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 *   version 2 of the License, or (at your option) any later version.      *
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 *                                                                         *
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 *   This library  is distributed in the hope that it will be useful,      *
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
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 *   GNU Library General Public License for more details.                  *
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 *                                                                         *
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 *   You should have received a copy of the GNU Library General Public     *
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 *   License along with this library; see the file COPYING.LIB. If not,    *
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 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
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 *   Suite 330, Boston, MA  02111-1307, USA                                *
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 *                                                                         *
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 ***************************************************************************/
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#include "PreCompiled.h"
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#ifndef _PreComp_
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#include <QtOpenGL>
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#include <Inventor/elements/SoCacheElement.h>
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#endif
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#include "SoFCDB.h"
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#include "So3DAnnotation.h"
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using namespace Gui;
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SO_NODE_SOURCE(So3DAnnotation);
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So3DAnnotation::So3DAnnotation()
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{
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    SO_NODE_CONSTRUCTOR(So3DAnnotation);
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}
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void So3DAnnotation::initClass()
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{
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    SO_NODE_INIT_CLASS(So3DAnnotation, SoSeparator, "3DAnnotation");
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}
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void So3DAnnotation::GLRender(SoGLRenderAction* action)
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{
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    switch (action->getCurPathCode()) {
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        case SoAction::NO_PATH:
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        case SoAction::BELOW_PATH:
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            this->GLRenderBelowPath(action);
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            break;
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        case SoAction::OFF_PATH:
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            // do nothing. Separator will reset state.
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            break;
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        case SoAction::IN_PATH:
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            this->GLRenderInPath(action);
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            break;
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    }
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}
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void So3DAnnotation::GLRenderBelowPath(SoGLRenderAction* action)
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{
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    if (action->isRenderingDelayedPaths()) {
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        glClear(GL_DEPTH_BUFFER_BIT);
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        inherited::GLRenderBelowPath(action);
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    }
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    else {
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        SoCacheElement::invalidate(action->getState());
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        action->addDelayedPath(action->getCurPath()->copy());
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    }
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}
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void So3DAnnotation::GLRenderInPath(SoGLRenderAction* action)
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{
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    if (action->isRenderingDelayedPaths()) {
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        glClear(GL_DEPTH_BUFFER_BIT);
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        inherited::GLRenderInPath(action);
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    }
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    else {
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        SoCacheElement::invalidate(action->getState());
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        action->addDelayedPath(action->getCurPath()->copy());
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    }
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}
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void So3DAnnotation::GLRenderOffPath(SoGLRenderAction* /* action */)
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{
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    // should never render, this is a separator node
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}