112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osg/NodeTrackerCallback>
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#include <osg/NodeVisitor>
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#include <osg/MatrixTransform>
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#include <osg/PositionAttitudeTransform>
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#include <osg/CameraView>
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#include <osg/Camera>
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#include <osg/Notify>
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using namespace osg;
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class ApplyMatrixVisitor : public NodeVisitor
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{
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public:
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ApplyMatrixVisitor(const osg::Matrix& matrix):
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_matrix(matrix) {}
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virtual void apply(Camera& camera)
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{
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camera.setViewMatrix(_matrix);
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}
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virtual void apply(CameraView& cv)
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{
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cv.setPosition(_matrix.getTrans());
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cv.setAttitude(_matrix.getRotate());
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}
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virtual void apply(MatrixTransform& mt)
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{
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mt.setMatrix(_matrix);
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}
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virtual void apply(PositionAttitudeTransform& pat)
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{
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pat.setPosition(_matrix.getTrans());
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pat.setAttitude(_matrix.getRotate());
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}
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osg::Matrix _matrix;
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};
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void NodeTrackerCallback::setTrackNode(osg::Node* node)
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{
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if (!node)
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{
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OSG_NOTICE<<"NodeTrackerCallback::setTrackNode(Node*): Unable to set tracked node due to null Node*"<<std::endl;
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return;
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}
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NodePathList parentNodePaths = node->getParentalNodePaths();
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if (!parentNodePaths.empty())
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{
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OSG_INFO<<"NodeTrackerCallback::setTrackNode(Node*): Path set"<<std::endl;
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setTrackNodePath(parentNodePaths[0]);
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}
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else
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{
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OSG_NOTICE<<"NodeTrackerCallback::setTrackNode(Node*): Unable to set tracked node due to empty parental path."<<std::endl;
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}
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}
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osg::Node* NodeTrackerCallback::getTrackNode()
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{
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osg::NodePath nodePath;
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if (_trackNodePath.getNodePath(nodePath)) return nodePath.back();
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else return 0;
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}
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const osg::Node* NodeTrackerCallback::getTrackNode() const
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{
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osg::NodePath nodePath;
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if (_trackNodePath.getNodePath(nodePath)) return nodePath.back();
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else return 0;
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}
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void NodeTrackerCallback::operator()(Node* node, NodeVisitor* nv)
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{
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if (nv->getVisitorType()==NodeVisitor::UPDATE_VISITOR)
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{
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update(*node);
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}
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traverse(node,nv);
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}
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void NodeTrackerCallback::update(osg::Node& node)
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{
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osg::NodePath nodePath;
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if (_trackNodePath.getNodePath(nodePath))
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{
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ApplyMatrixVisitor applyMatrix(computeWorldToLocal(nodePath));
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node.accept(applyMatrix);
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}
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}
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