100 lines
3.4 KiB
Plaintext
100 lines
3.4 KiB
Plaintext
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/* -*-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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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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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_UTIL_GRATICULE_LABELING_ENGINE_H
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#define OSGEARTH_UTIL_GRATICULE_LABELING_ENGINE_H 1
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#include <osgEarth/Common>
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#include <osgEarth/ClipSpace>
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#include <osgEarth/GeoData>
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#include <osgEarth/MapNode>
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#include <osgEarth/Containers>
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#include <osgEarth/LabelNode>
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namespace osgEarth { namespace Util
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{
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using namespace osgEarth;
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/**
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* Node that plots graticule coordinates labels along the edge of the
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* viewport when you are looking straight down on a zoomed-in area.
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*/
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class GraticuleLabelingEngine : public osg::Group
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{
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public:
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//! Construct a new labeling engine with the map's SRS
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GraticuleLabelingEngine(const SpatialReference* srs);
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bool getVisible(osg::Camera* camera);
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//! Set the labeling style for all labels
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void setStyle(const Style& style);
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//! Set the labeling style for X and Y labels separately
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void setStyles(const Style& xStyle, const Style& yStyle);
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public: // osg::Node
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void traverse(osg::NodeVisitor& nv);
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protected:
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typedef std::vector< osg::ref_ptr<LabelNode> > LabelNodeVector;
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struct CameraData
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{
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CameraData():
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visible(false)
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{
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}
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LabelNodeVector xLabels;
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LabelNodeVector yLabels;
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bool visible;
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};
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bool cullTraverse(osgUtil::CullVisitor& nv, CameraData& data);
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// Override to place labels
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virtual bool updateLabels(const osg::Vec3d& LL_world, osg::Vec3d& UL_world, osg::Vec3d& LR_world, ClipSpace& window, CameraData& data);
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typedef PerObjectFastMap<osg::Camera*, CameraData> CameraDataMap;
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CameraDataMap _cameraDataMap;
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struct AcceptCameraData : public CameraDataMap::Functor {
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AcceptCameraData(osg::NodeVisitor& nv) : _nv(nv) { }
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void operator()(CameraData& data);
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osg::NodeVisitor& _nv;
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};
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struct UpdateLabelStyles : public CameraDataMap::Functor {
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UpdateLabelStyles(const Style& xStyle, const Style& yStyle) : _xStyle(&xStyle), _yStyle(&yStyle) { }
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void operator()(CameraData& data);
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const Style* _xStyle;
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const Style* _yStyle;
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};
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osg::ref_ptr<const SpatialReference> _srs;
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Style _xLabelStyle, _yLabelStyle;
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};
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} } // namespace osgEarth::Util
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#endif // OSGEARTH_UTIL_GRATICULE_LABELING_ENGINE_H
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