source: experimental/TerrainTest/ellipsoidTechnique.cpp @ 263

#include "ellipsoidTechnique.h"
#include <osgTerrain/TerrainTile>


ellipsoidTechnique::ellipsoidTechnique()
{
        _height = 0.0;
}

ellipsoidTechnique::~ellipsoidTechnique()
{
}

void ellipsoidTechnique::modifyHeightfield(osg::Vec4d& modificationROI, osg::HeightField* h, osg::Vec4d tileExtends)
{
        //OSG_NOTIFY( osg::ALWAYS ) << "ellipsoidTechnique::modifyHeightfield()" << std::endl;
        //OSG_NOTIFY( osg::ALWAYS ) << "LAT: " << tileExtends[0] << " | " << tileExtends[1] << std::endl;
        //OSG_NOTIFY( osg::ALWAYS ) << "LON: " << tileExtends[2] << " | " << tileExtends[3] << std::endl;

        // calculate colum start/end and row start/end of affected vertices
        int startX=0, startY=0, endX=h->getNumColumns(), endY=h->getNumRows();

        
        // Dertermine loop variables..
        if(tileExtends[0]<modificationROI[0])
                startY = (modificationROI[0] - tileExtends[0]) / h->getYInterval();
        if(tileExtends[1]>modificationROI[1])
                endY = (modificationROI[1] - tileExtends[0]) / h->getYInterval();

        if(tileExtends[2]<modificationROI[2])
                startX = (modificationROI[2] - tileExtends[2]) / h->getXInterval();
        if(tileExtends[3]>modificationROI[3])
                endX = (modificationROI[3] - tileExtends[2]) / h->getXInterval();


        // Modify height value of affected vertices
        for(int x=startX;x<endX;x++)
        {
                for(int y=startY;y<endY;y++)
                {
                        h->setHeight( x, y, _height);
                }
        }
}