170 lines
3.8 KiB
C++
170 lines
3.8 KiB
C++
#include "osg/LOD"
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#include <osg/io_utils>
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#include "osgDB/Registry"
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#include "osgDB/Input"
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#include "osgDB/Output"
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using namespace osg;
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using namespace osgDB;
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// forward declare functions to use later.
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bool LOD_readLocalData(Object& obj, Input& fr);
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bool LOD_writeLocalData(const Object& obj, Output& fw);
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// register the read and write functions with the osgDB::Registry.
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RegisterDotOsgWrapperProxy g_LODProxy
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(
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new osg::LOD,
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"LOD",
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"Object Node LOD Group",
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&LOD_readLocalData,
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&LOD_writeLocalData
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);
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bool LOD_readLocalData(Object& obj, Input& fr)
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{
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bool iteratorAdvanced = false;
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LOD& lod = static_cast<LOD&>(obj);
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if (fr.matchSequence("Center %f %f %f"))
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{
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Vec3 center;
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fr[1].getFloat(center[0]);
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fr[2].getFloat(center[1]);
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fr[3].getFloat(center[2]);
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lod.setCenter(center);
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iteratorAdvanced = true;
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fr+=4;
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}
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float radius;
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if (fr[0].matchWord("Radius") && fr[1].getFloat(radius))
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{
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lod.setRadius(radius);
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fr+=2;
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iteratorAdvanced = true;
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}
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if(fr[0].matchWord("RangeMode")){
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if(fr[1].matchWord("DISTANCE_FROM_EYE_POINT")){
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lod.setRangeMode(osg::LOD::DISTANCE_FROM_EYE_POINT);
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}
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else {
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lod.setRangeMode(osg::LOD::PIXEL_SIZE_ON_SCREEN);
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}
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fr+=2;
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iteratorAdvanced = true;
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}
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// For backwards compatibility with old style LOD's (pre October 2002).
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bool matchFirst = false;
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if ((matchFirst=fr.matchSequence("Ranges {")) || fr.matchSequence("Ranges %i {"))
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{
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// set up coordinates.
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int entry = fr[0].getNoNestedBrackets();
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if (matchFirst)
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{
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fr += 2;
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}
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else
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{
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fr += 3;
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}
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float minRange=0.0;
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float maxRange=0.0;
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unsigned int i=0;
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while (!fr.eof() && fr[0].getNoNestedBrackets()>entry)
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{
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if (fr[0].getFloat(maxRange))
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{
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if (i>0) lod.setRange(i-1,minRange,maxRange);
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++fr;
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++i;
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minRange = maxRange;
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}
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else
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{
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++fr;
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}
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}
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iteratorAdvanced = true;
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++fr;
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}
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if ((matchFirst=fr.matchSequence("RangeList {")) || fr.matchSequence("RangeList %i {"))
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{
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// set up coordinates.
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int entry = fr[0].getNoNestedBrackets();
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if (matchFirst)
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{
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fr += 2;
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}
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else
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{
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fr += 3;
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}
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float minRange=0.0;
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float maxRange=0.0;
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unsigned int i=0;
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while (!fr.eof() && fr[0].getNoNestedBrackets()>entry)
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{
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if (fr[0].getFloat(minRange) && fr[1].getFloat(maxRange) )
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{
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lod.setRange(i,minRange,maxRange);
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fr+=2;
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++i;
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}
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else
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{
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++fr;
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}
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}
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iteratorAdvanced = true;
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++fr;
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}
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return iteratorAdvanced;
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}
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bool LOD_writeLocalData(const Object& obj, Output& fw)
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{
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const LOD& lod = static_cast<const LOD&>(obj);
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if (lod.getCenterMode()==osg::LOD::USER_DEFINED_CENTER) fw.indent() << "Center "<< lod.getCenter() << std::endl;
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fw.indent() << "Radius "<<lod.getRadius()<<std::endl;
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if(lod.getRangeMode()==osg::LOD::DISTANCE_FROM_EYE_POINT){
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fw.indent() << "RangeMode DISTANCE_FROM_EYE_POINT"<<std::endl;
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}
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else {
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fw.indent() << "RangeMode PIXEL_SIZE_ON_SCREEN"<<std::endl;
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}
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fw.indent() << "RangeList "<<lod.getNumRanges()<<" {"<< std::endl;
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fw.moveIn();
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for(unsigned int i=0; i<lod.getNumRanges();++i)
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{
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fw.indent() << lod.getMinRange(i) << " "<<lod.getMaxRange(i)<<std::endl;
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}
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fw.moveOut();
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fw.indent() << "}"<< std::endl;
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return true;
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}
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