Hey all I need a little help. I'm still having a problem with my trees.
They are still floating. Here's the code for my trees:
osg::ref_ptr<osg::StateSet>sset = new osg::StateSet;
osg::ref_ptr<osg::Texture2D> tex = new osg::Texture2D;
tex->setImage( osgDB::readImageFile( "tree0.rgba" ));
tex->setWrap( osg::Texture2D::WRAP_S, osg::Texture2D::CLAMP );
tex->setWrap( osg::Texture2D::WRAP_T, osg::Texture2D::CLAMP );
tex->setFilter( osg::Texture2D::MIN_FILTER,
osg::Texture2D::LINEAR_MIPMAP_LINEAR );
tex->setFilter( osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR);
sset->setTextureAttributeAndModes( 0, tex.get() );
//**********************************************************************
****
osg::ref_ptr<osg::Billboard> bb = new osg::Billboard;
bb->setStateSet( sset.get() );
int _error=0, y = 10, x = 10, _tim = 0;
osg::Vec3d lv = osg::Vec3d(0.0,0.0,-1.0);
osg::Vec3d up = osg::Vec3d(0.0,1.0,0.0);
std::cout << "Creating Tree Locations ... ";
for( int treeNum = 0; treeNum < 5000; treeNum++ )
{
// Place this tree at a random X,Y location
x = rand()%1000;
y = rand()%1000;
// Give it a random height
float h = 2.0 + float(rand()%400)/100.0;
///////////////// Intersect Visitor section of code
////////////////////////
osgUtil::IntersectVisitor isectVis;
osgUtil::IntersectVisitor;
isectVis.setLODSelectionMode(osgUtil::IntersectVisitor::USE_SEGMENT_STAR
T_POINT_AS_EYE_POINT_FOR_LOD_LEVEL_SELECTION);
osg::ref_ptr<osg::LineSegment> lineSeg = new
osg::LineSegment;
//calculate distance
osg::Vec3d lv2;
osg::Vec3d center(0.0,0.0,0.0);
lv2.set( osg::Vec3d(x,y,50000) - center);
double _distance = lv2.length();
lineSeg->set(osg::Vec3d(x,y,50000),osg::Vec3d(x,y,50000)
+ lv * _distance);
isectVis.addLineSegment(lineSeg.get());
terrain->accept(isectVis);
if (isectVis.hits())
{
osgUtil::IntersectVisitor::HitList&
hitList = isectVis.getHitList(lineSeg.get());
if (!hitList.empty())
{
osg::Vec3 ip =
hitList.front().getWorldIntersectPoint();
osg::Vec3 np =
hitList.front().getWorldIntersectNormal();
bb->addDrawable( tree(h).get()
);
bb->setPosition( _tim, ip);
}
}
_tim++;
}
std::cout << "Done" << std::endl;
return bb.get();
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