1 // Copyright (C) 2008 Till Busch buti@bux.at
3 // This program is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU General Public License as
5 // published by the Free Software Foundation; either version 2 of the
6 // License, or (at your option) any later version.
8 // This program is distributed in the hope that it will be useful, but
9 // WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 // General Public License for more details.
13 // You should have received a copy of the GNU General Public License
14 // along with this program; if not, write to the Free Software
15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 #include <osg/Transform>
19 #include <simgear/debug/logstream.hxx>
21 #include "CheckSceneryVisitor.hxx"
22 #include "SGPagedLOD.hxx"
24 using namespace simgear;
26 CheckSceneryVisitor::CheckSceneryVisitor(osgDB::DatabasePager* dbp, osg::Vec3 &position, double range)
27 :osg::NodeVisitor(osg::NodeVisitor::NODE_VISITOR,
28 osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN),
29 _loaded(true), _position(position), _range(range), _dbp(dbp)
31 _viewMatrices.push_back(osg::Matrix::identity());
34 void CheckSceneryVisitor::apply(osg::Node& node)
39 void CheckSceneryVisitor::apply(osg::PagedLOD& node)
41 SGPagedLOD *sgplod = dynamic_cast<SGPagedLOD*>(&node);
43 osg::Vec3 pos = sgplod->getCenter() * _viewMatrices.back();
44 double dist = (pos-_position).length();
46 if (sgplod->getNumChildren() < 1) {
47 // if the DatabasePager would load LODs while the splashscreen
48 // is there, we could just wait for the models to be loaded
49 // by only setting setLoaded(false) here
50 sgplod->forceLoad(_dbp);
58 void CheckSceneryVisitor::apply(osg::Transform &node)
60 osg::Matrix currMatrix = _viewMatrices.back();
61 bool pushMatrix = node.computeLocalToWorldMatrix(currMatrix, this);
64 _viewMatrices.push_back(currMatrix);
68 _viewMatrices.pop_back();