Mathias Froehlich
ad079b8ed4
Add method that schedules a ProxyNode to do just deferred model loading instead of full scenery paging. Add support for ProxyNodes to CheckSceneryVisitor. Use PagedLOD instead of our own derived method.
108 lines
3.8 KiB
C++
108 lines
3.8 KiB
C++
// Copyright (C) 2008 Till Busch buti@bux.at
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// Copyright (C) 2011 Mathias Froehlich
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#ifdef HAVE_CONFIG_H
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# include <simgear_config.h>
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#endif
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#include <osg/Transform>
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#include <osg/ProxyNode>
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#include <osgDB/DatabasePager>
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#include <simgear/debug/logstream.hxx>
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#include "CheckSceneryVisitor.hxx"
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#include <simgear/math/SGMath.hxx>
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using namespace simgear;
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CheckSceneryVisitor::CheckSceneryVisitor(osgDB::DatabasePager* dbp, const osg::Vec3 &position, double range,
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osg::FrameStamp* framestamp)
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:osg::NodeVisitor(osg::NodeVisitor::NODE_VISITOR,
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osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN),
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_position(position), _range(range), _loaded(true), _matrix(osg::Matrix::identity())
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{
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setDatabaseRequestHandler(dbp);
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setFrameStamp(framestamp);
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}
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void CheckSceneryVisitor::apply(osg::Node& node)
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{
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traverse(node);
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}
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void CheckSceneryVisitor::apply(osg::ProxyNode& node)
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{
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osg::Vec3 pos = node.getCenter() * _matrix;
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double dist = (pos - _position).length();
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if (dist < _range) {
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for (unsigned i = 0; i < node.getNumFileNames(); ++i) {
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if (node.getFileName(i).empty())
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continue;
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// Check if this is already loaded.
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if (i < node.getNumChildren() && node.getChild(i))
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continue;
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// if the DatabasePager would load LODs while the splashscreen
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// is there, we could just wait for the models to be loaded
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// by only setting setLoaded(false) here
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osg::NodePath nodePath = getNodePath();
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DatabaseRequestHandler* db = getDatabaseRequestHandler();
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const osg::FrameStamp* fs = getFrameStamp();
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db->requestNodeFile(node.getFileName(i), nodePath, 1.0 /*priority*/, fs,
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node.getDatabaseRequest(i), node.getDatabaseOptions());
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setLoaded(false);
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}
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}
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traverse(node);
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}
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void CheckSceneryVisitor::apply(osg::PagedLOD& node)
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{
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osg::Vec3 pos = node.getCenter() * _matrix;
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double dist = (pos - _position).length();
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if (dist < _range) {
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for (unsigned i = 0; i < node.getNumFileNames(); ++i) {
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if (node.getFileName(i).empty())
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continue;
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// Check if this is already loaded.
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if (i < node.getNumChildren() && node.getChild(i))
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continue;
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// if the DatabasePager would load LODs while the splashscreen
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// is there, we could just wait for the models to be loaded
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// by only setting setLoaded(false) here
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osg::NodePath nodePath = getNodePath();
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DatabaseRequestHandler* db = getDatabaseRequestHandler();
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const osg::FrameStamp* fs = getFrameStamp();
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db->requestNodeFile(node.getFileName(i), nodePath, 1.0 /*priority*/, fs,
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node.getDatabaseRequest(i), node.getDatabaseOptions());
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setLoaded(false);
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}
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}
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traverse(node);
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}
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void CheckSceneryVisitor::apply(osg::Transform &node)
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{
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osg::Matrix matrix = _matrix;
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node.computeLocalToWorldMatrix(_matrix, this);
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traverse(node);
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_matrix = matrix;
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}
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