1 /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2009 Robert Osfield 2 * 3 * This library is open source and may be redistributed and/or modified under 4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 5 * (at your option) any later version. The full license is in LICENSE file 6 * included with this distribution, and on the openscenegraph.org website. 7 * 8 * This library is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * OpenSceneGraph Public License for more details. 12 */ 13 14 #include <osgVolume/VolumeTechnique> 15 #include <osgVolume/VolumeTile> 16 17 using namespace osgVolume; 18 VolumeTechnique()19VolumeTechnique::VolumeTechnique(): 20 _volumeTile(0) 21 { 22 setThreadSafeRefUnref(true); 23 } 24 VolumeTechnique(const VolumeTechnique & rhs,const osg::CopyOp & copyop)25VolumeTechnique::VolumeTechnique(const VolumeTechnique& rhs,const osg::CopyOp& copyop): 26 osg::Object(rhs,copyop), 27 _volumeTile(0) 28 { 29 } 30 ~VolumeTechnique()31VolumeTechnique::~VolumeTechnique() 32 { 33 } 34 init()35void VolumeTechnique::init() 36 { 37 OSG_NOTICE<<className()<<"::initialize(..) not implementated yet"<<std::endl; 38 } 39 update(osgUtil::UpdateVisitor * uv)40void VolumeTechnique::update(osgUtil::UpdateVisitor* uv) 41 { 42 OSG_NOTICE<<className()<<"::update(..) not implementated yet"<<std::endl; 43 if (_volumeTile) _volumeTile->osg::Group::traverse(*uv); 44 } 45 cull(osgUtil::CullVisitor * cv)46void VolumeTechnique::cull(osgUtil::CullVisitor* cv) 47 { 48 OSG_NOTICE<<className()<<"::cull(..) not implementated yet"<<std::endl; 49 if (_volumeTile) _volumeTile->osg::Group::traverse(*cv); 50 } 51 cleanSceneGraph()52void VolumeTechnique::cleanSceneGraph() 53 { 54 OSG_NOTICE<<className()<<"::cleanSceneGraph(..) not implementated yet"<<std::endl; 55 } 56 traverse(osg::NodeVisitor & nv)57void VolumeTechnique::traverse(osg::NodeVisitor& nv) 58 { 59 if (!_volumeTile) return; 60 61 // if app traversal update the frame count. 62 if (nv.getVisitorType()==osg::NodeVisitor::UPDATE_VISITOR) 63 { 64 if (_volumeTile->getDirty()) _volumeTile->init(); 65 66 osgUtil::UpdateVisitor* uv = dynamic_cast<osgUtil::UpdateVisitor*>(&nv); 67 if (uv) 68 { 69 update(uv); 70 return; 71 } 72 73 } 74 else if (nv.getVisitorType()==osg::NodeVisitor::CULL_VISITOR) 75 { 76 osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(&nv); 77 if (cv) 78 { 79 cull(cv); 80 return; 81 } 82 } 83 84 if (_volumeTile->getDirty()) _volumeTile->init(); 85 86 // otherwise fallback to the Group::traverse() 87 _volumeTile->osg::Group::traverse(nv); 88 } 89 isMoving(osgUtil::CullVisitor * cv)90bool VolumeTechnique::isMoving(osgUtil::CullVisitor* cv) 91 { 92 bool moving = false; 93 94 OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex); 95 96 ModelViewMatrixMap::iterator itr = _modelViewMatrixMap.find(cv->getIdentifier()); 97 if (itr!=_modelViewMatrixMap.end()) 98 { 99 osg::Matrix newModelViewMatrix = *(cv->getModelViewMatrix()); 100 osg::Matrix& previousModelViewMatrix = itr->second; 101 moving = (newModelViewMatrix != previousModelViewMatrix); 102 103 previousModelViewMatrix = newModelViewMatrix; 104 } 105 else 106 { 107 _modelViewMatrixMap[cv->getIdentifier()] = *(cv->getModelViewMatrix()); 108 } 109 return moving; 110 } 111