105 lines
3.3 KiB
C++
105 lines
3.3 KiB
C++
/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2020 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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,
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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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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#ifndef OSGEARTH_OBJECTID_PICKER_H
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#define OSGEARTH_OBJECTID_PICKER_H 1
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#include <osgEarth/Common>
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#include <osgEarth/ObjectIndex>
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#include <osg/Group>
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#include <osg/Image>
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#include <osg/Texture2D>
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#include <osgViewer/View>
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#include <queue>
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#include <list>
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namespace osgEarth { namespace Util
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{
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/**
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* Picks objects that are encoded with ObjectIDs.
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* Usage: see osgearth_pick.cpp
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*/
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class OSGEARTH_EXPORT ObjectIDPicker : public osg::Node
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{
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public:
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//! Construct a new picker
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ObjectIDPicker();
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//! View within which to pick
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void setView(osgViewer::View* view);
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osgViewer::View* getView() const { return _view.get(); }
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//! Scene graph from which to pick
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void setGraph(osg::Node*);
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osg::Node* getGraph() const { return _graph.get(); }
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//! Pixels on each side of the clicked pixel to check for hits.
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void setBuffer(int value) { _buffer = value; }
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int getBuffer() const { return _buffer; }
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//! Size of the RTT image (pixels per side) - must call before setView()
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void setRTTSize(int value) { _rttSize = value; }
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int getRTTSize() const { return _rttSize; }
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using Function = std::function<void(ObjectID)>;
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//! Function to call when the user hovers an object
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void onHover(Function func);
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//! Function to call when the user clicks an object
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void onClick(Function func);
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public: // for debugging
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/** For debugging only - creates (if nec.) and returns a texture that captures
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the RTT image so you can display it. */
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osg::Texture2D* getOrCreateTexture();
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public: // osg::Node
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void traverse(osg::NodeVisitor&) override;
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protected:
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/** dtor */
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virtual ~ObjectIDPicker();
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void onMove(osg::View* view, float x, float y);
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void onClick(osg::View* view, float x, float y);
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osg::observer_ptr<osgViewer::View> _view;
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osg::ref_ptr<osg::Image> _pickImage;
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std::vector<Function> _hoverFuncs;
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std::vector<Function> _clickFuncs;
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osg::ref_ptr<osg::Camera> _rtt;
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osg::ref_ptr<osg::Node> _graph;
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osg::ref_ptr<osg::Texture2D> _debugTex;
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void pick(osg::View* view, float x, float y, std::vector<Function>&);
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void setupRTT(osgViewer::View*);
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int _rttSize; // size of the RTT image (pixels per side)
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int _buffer; // buffer around pick point to check (pixels)
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};
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} }
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#endif // OSGEARTH_OBJECTID_PICKER_H
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