SkyBoxNode.cpp

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/*
* True Reality Open Source Game and Simulation Engine
* Copyright © 2021 Acid Rain Studios LLC
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3.0 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* @author Maxim Serebrennik
*/

#include <trCore/SceneObjects/SkyBoxNode.h>

#include <osg/Depth>
#include <osgDB/ReadFile>
#include <osgUtil/CullVisitor>

namespace trCore::SceneObjects
{
    SkyBoxNode::SkyBoxNode()
    {
        setCullingActive(false);
        getOrCreateStateSet()->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
        getStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
        getStateSet()->setRenderBinDetails(INT_MIN, "RenderBin");
    }

    bool SkyBoxNode::computeLocalToWorldMatrix(osg::Matrix & matrix, osg::NodeVisitor * nv) const
    {
        if (nv && nv->getVisitorType() == osg::NodeVisitor::CULL_VISITOR)
        {
            osgUtil::CullVisitor* cv = static_cast<osgUtil::CullVisitor*>(nv);
            matrix.preMult(osg::Matrix::translate(cv->getEyeLocal()));
            return true;
        }
        else
        {
            return BaseClass::computeLocalToWorldMatrix(matrix, nv);
        }
    }

    bool SkyBoxNode::computeWorldToLocalMatrix(osg::Matrix & matrix, osg::NodeVisitor * nv) const
    {
        if (nv && nv->getVisitorType() == osg::NodeVisitor::CULL_VISITOR)
        {
            osgUtil::CullVisitor* cv = static_cast<osgUtil::CullVisitor*>(nv);
            matrix.postMult(osg::Matrix::translate(cv->getEyeLocal()));
            return true;
        }
        else
        {
            return BaseClass::computeWorldToLocalMatrix(matrix, nv);
        }
    }

    bool SkyBoxNode::LoadFile(std::string fileName)
    {
        mNode = osgDB::readNodeFile(fileName);
        if (mNode.Valid())
        {
            addChild(mNode);
            return true;
        }
        else
        {
            return false;
        }
    }

    SkyBoxNode::~SkyBoxNode()
    {
    }
}