void IntersectionVisitor::apply(osg::Billboard& billboard)
{
if (!enter(billboard)) return;
#if 1
// IntersectVisitor doesn't have getEyeLocal(), can we use NodeVisitor::getEyePoint()?
osg::Vec3 eye_local = getEyePoint();
for(unsigned int i = 0; i < billboard.getNumDrawables(); i++ )
{
const osg::Vec3& pos = billboard.getPosition(i);
osg::ref_ptr<osg::RefMatrix> billboard_matrix = _modelStack.empty() ?
new osg::RefMatrix :
new osg::RefMatrix(*_modelStack.back());
billboard.computeMatrix(*billboard_matrix,eye_local,pos);
pushModelMatrix(billboard_matrix.get());
// now push an new intersector clone transform to the new local coordinates
push_clone();
intersect( billboard.getDrawable(i) );
// now push an new intersector clone transform to the new local coordinates
pop_clone();
popModelMatrix();
}
#else
for(unsigned int i=0; i<billboard.getNumDrawables(); ++i)
{
intersect( billboard.getDrawable(i) );
}
#endif
leave();
}
void WriterNodeVisitor::apply( osg::Billboard &node )
{
// TODO Does not handle Billboards' points yet
pushStateSet(node.getStateSet());
Lib3dsMeshInstanceNode * parent = _cur3dsNode;
unsigned int count = node.getNumDrawables();
ListTriangle listTriangles;
bool texcoords = false;
OSG_NOTICE << "Warning: 3DS writer is incomplete for Billboards (rotation not implemented)." << std::endl;
#if DISABLE_3DS_ANIMATION
osg::Matrix m( osg::computeLocalToWorld(getNodePath()) );
#endif
for ( unsigned int i = 0; i < count; i++ )
{
osg::Geometry *g = node.getDrawable( i )->asGeometry();
if ( g != NULL )
{
listTriangles.clear();
_cur3dsNode = parent;
pushStateSet(g->getStateSet());
createListTriangle(g, listTriangles, texcoords, i);
popStateSet(g->getStateSet()); // May set _succeded to false
if (!succeeded()) break;
osg::Matrix pointLocalMat(osg::Matrix::translate(node.getPosition(i))); // TODO handle rotation
#if DISABLE_3DS_ANIMATION
osg::Matrix currentBillboardWorldMat(pointLocalMat * m);
apply3DSMatrixNode(node, &pointLocalMat, "bil"); // Add a 3DS matrix node (with local matrix)
buildFaces(node, currentBillboardWorldMat, listTriangles, texcoords); // May set _succeded to false
#else
apply3DSMatrixNode(node, &pointLocalMat, "bil"); // Add a 3DS matrix node (with local matrix)
buildFaces(node, osg::Matrix(), listTriangles, texcoords); // May set _succeded to false
#endif
if (!succeeded()) break;
}
}
if (succeeded())
traverse(node);
_cur3dsNode = parent;
popStateSet(node.getStateSet());
}
void CVRCullVisitor::apply(osg::Billboard& node)
{
bool status = _cullingStatus;
bool firstStatus = _firstCullStatus;
if(isCulled(node))
{
_firstCullStatus = firstStatus;
_cullingStatus = status;
return;
}
// push the node's state.
StateSet* node_state = node.getStateSet();
if(node_state)
pushStateSet(node_state);
// traverse any call callbacks and traverse any children.
handle_cull_callbacks_and_traverse(node);
const Vec3& eye_local = getEyeLocal();
const RefMatrix& modelview = *getModelViewMatrix();
for(unsigned int i = 0; i < node.getNumDrawables(); ++i)
{
const Vec3& pos = node.getPosition(i);
Drawable* drawable = node.getDrawable(i);
// need to modify isCulled to handle the billboard offset.
// if (isCulled(drawable->getBound())) continue;
if(drawable->getCullCallback())
{
if(drawable->getCullCallback()->cull(this,drawable,&_renderInfo)
== true)
continue;
}
RefMatrix* billboard_matrix = createOrReuseMatrix(modelview);
node.computeMatrix(*billboard_matrix,eye_local,pos);
if(_computeNearFar && drawable->getBound().valid())
updateCalculatedNearFar(*billboard_matrix,*drawable,true);
float depth = distance(pos,modelview);
/*
if (_computeNearFar)
{
if (d<_computed_znear)
{
if (d<0.0) OSG_NOTIFY(osg::WARN)<<"Alerting billboard handling ="<<d<< std::endl;
_computed_znear = d;
}
if (d>_computed_zfar) _computed_zfar = d;
}
*/
StateSet* stateset = drawable->getStateSet();
if(stateset)
pushStateSet(stateset);
if(osg::isNaN(depth))
{
/*OSG_NOTIFY(osg::NOTICE)<<"CullVisitor::apply(Billboard&) detected NaN,"<<std::endl
<<" depth="<<depth<<", pos=("<<pos<<"),"<<std::endl
<<" *billboard_matrix="<<*billboard_matrix<<std::endl;
OSG_NOTIFY(osg::DEBUG_INFO) << " NodePath:" << std::endl;
for (NodePath::const_iterator i = getNodePath().begin(); i != getNodePath().end(); ++i)
{
OSG_NOTIFY(osg::DEBUG_INFO) << " \"" << (*i)->getName() << "\"" << std::endl;
}*/
}
else
{
addDrawableAndDepth(drawable,billboard_matrix,depth);
}
if(stateset)
popStateSet();
}
// pop the node's state off the geostate stack.
if(node_state)
popStateSet();
_firstCullStatus = firstStatus;
_cullingStatus = status;
}