OpenSceneGraph/src/osgPlugins/ive/PagedLOD.cpp

/**********************************************************************
 *
 *    FILE:            PagedLOD.cpp
 *
 *    DESCRIPTION:    Read/Write osg::PagedLOD in binary format to disk.
 *
 *    CREATED BY:        Auto generated by iveGenerate
 *                    and later modified by Rune Schmidt Jensen.
 *
 *    HISTORY:        Created 24.3.2003
 *
 *    Copyright 2003 VR-C
 **********************************************************************/

#include "Exception.h"
#include "PagedLOD.h"
#include "Node.h"

#include <osgDB/Options>

using namespace ive;

void PagedLOD::write(DataOutputStream* out)
{
    // Write LOD's identification.
    out->writeInt(IVEPAGEDLOD);
    // If the osg class is inherited by any other class we should also write this to file.

    osg::Node* node = dynamic_cast<osg::Node*>(this);
    if(node){
        static_cast<ive::Node*>(node)->write(out);
    }
    else
        out_THROW_EXCEPTION("PagedLOD::write(): Could not cast this osg::PagedLOD to an osg::Node.");

    out->writeString(getDatabasePath());
    out->writeFloat(getRadius());
    out->writeUInt(getNumChildrenThatCannotBeExpired());

    if ( out->getVersion() >= VERSION_0041 )
    {
        out->writeBool(getDisableExternalChildrenPaging());
    }

    unsigned int numChildrenToWriteOut = 0;

    int i;
    for(i=0; i<(int)getNumFileNames();++i)
    {
        if (getFileName(i).empty())
        {
            ++numChildrenToWriteOut;
        }
    }

    // Write Group's properties.
    // Write number of children.
    out->writeInt(numChildrenToWriteOut);
    // Write children.
    for(i=0; i<(int)getNumChildren(); i++){
        if (getFileName(i).empty())
        {
            osg::Node* child = getChild(i);
            out->writeNode(child);
        }
    }

    // LOD properties
    // Write centermode
    out->writeInt(getCenterMode());
    out->writeVec3(getCenter());

    out->writeInt(getRangeMode());


    // Write rangelist
    int size = getNumRanges();
    out->writeInt(size);
    for(i=0;i<size;i++){
        out->writeFloat(getMinRange(i));
        out->writeFloat(getMaxRange(i));
    }


    // PagedLOD properties
    size = getNumFileNames();
    out->writeInt(size);
    for(i=0;i<size;i++){
        out->writeString(getFileName(i));
    }

    // PagedLOD priority settings
    // 2006/03/10 GW
    if ( out->getVersion() >= VERSION_0015 )
    {
        size = getNumPriorityOffsets();
        out->writeInt( size );
        for(i=0; i<size; i++)
        {
            out->writeFloat( getPriorityOffset( i ) );
        }

        size = getNumPriorityScales();
        out->writeInt( size );
        for(i=0; i<size; i++ )
        {
            out->writeFloat( getPriorityScale( i ) );
        }
    }
}

void PagedLOD::read(DataInputStream* in)
{
    // Peek on LOD's identification.
    int id = in->peekInt();
    if(id == IVEPAGEDLOD)
    {
        // Read LOD's identification.
        id = in->readInt();
        // If the osg class is inherited by any other class we should also read this from file.
        osg::Node* node = dynamic_cast<osg::Node*>(this);
        if(node){
            ((ive::Node*)(node))->read(in);
        }
        else
            in_THROW_EXCEPTION("PagedLOD::read(): Could not cast this osg::PagedLOD to an osg::Node.");


        if ( in->getVersion() >= VERSION_0006 )
        {
           setDatabasePath(in->readString());
        }

        if (getDatabasePath().empty() && in->getOptions() && !in->getOptions()->getDatabasePathList().empty())
        {
            const std::string& path = in->getOptions()->getDatabasePathList().front();
            if (!path.empty()) 
            {
                setDatabasePath(path);
            }
        } 


        setRadius(in->readFloat());
        setNumChildrenThatCannotBeExpired(in->readUInt());

        if ( in->getVersion() >= VERSION_0041 )
        {
            setDisableExternalChildrenPaging(in->readBool());
        }


        // Read groups properties.
        // Read number of children.
        int size = in->readInt();
        // Read children.
        int i;
        for(i=0; i<size; i++)
        {
            addChild(in->readNode());            
        }

        // Read centermode
        setCenterMode((osg::LOD::CenterMode)in->readInt());
        setCenter(in->readVec3());

        setRangeMode((RangeMode)in->readInt());

        // Read rangelist
        size = in->readInt();
        for(i=0;i<size;i++){
            float min = in->readFloat();
            float max = in->readFloat();
            setRange(i, min, max);
        }

        size = in->readInt();
        for(i=0;i<size;i++){
            setFileName(i, in->readString());
        }
        

        // PagedLOD priority settings
        // 2006/03/10 GW
        if ( in->getVersion() >= VERSION_0015 )
        {
            // priority offsets:
            size = in->readInt();
            for(i=0; i<size; i++ )
            {
                float pri_offset = in->readFloat();
                setPriorityOffset( i, pri_offset );
            }

            // priority scales:
            size = in->readInt();
            for(i=0; i<size; i++ )
            {
                float pri_scale = in->readFloat();
                setPriorityScale( i, pri_scale );
            }

        }
    }
    else{
        in_THROW_EXCEPTION("LOD::read(): Expected LOD identification.");
    }
}