txpseamlod.cpp

来自「最新osg包」· C++ 代码 · 共 56 行

#include "TXPSeamLOD.h"
#include "TXPArchive.h"
#include "TXPPagedLOD.h"
#include "TileMapper.h"

using namespace txp;
using namespace osg;

TXPSeamLOD::TXPSeamLOD() :
    Group()
{
    _dx = 0;
    _dy = 0;
}

TXPSeamLOD::TXPSeamLOD(int x, int y, int lod, int dx, int dy) :
    Group()
{
    _tid.x = x;
    _tid.y = y;
    _tid.lod = lod;
    _dx = dx;
    _dy = dy;
}

TXPSeamLOD::TXPSeamLOD(const TXPSeamLOD& ttg,const osg::CopyOp& copyop) :
    Group(ttg,copyop)
{
    _tid = ttg._tid;
    _dx = ttg._dx;
    _dy = ttg._dy;
}

void TXPSeamLOD::traverse(osg::NodeVisitor& nv)
{
    if (nv.getVisitorType()==osg::NodeVisitor::CULL_VISITOR && getNumChildren()==2)
    {
    
        TileMapper* tileMapper = dynamic_cast<TileMapper*>(nv.getUserData());

        if (tileMapper && !tileMapper->isTileNeighbourALowerLODLevel(_tid,_dx,_dy))
        {
            getChild(1)->accept(nv);
        }
        else
        {
            getChild(0)->accept(nv);
        }
        
    }
    else
    {
        Group::traverse(nv);
    }
}