96 lines
3.1 KiB
C++
96 lines
3.1 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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* 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 OSGEARTHFEATURES_TESSELLATE_OPERATOR_H
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#define OSGEARTHFEATURES_TESSELLATE_OPERATOR_H 1
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#include <osgEarth/Common>
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#include <osgEarth/Feature>
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#include <osgEarth/FilterContext>
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namespace osgEarth { namespace Util
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{
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/**
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* Tessellates linear data in a feature geometry by subdividing each
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* line segment a specified # of times.
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*/
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class OSGEARTH_EXPORT TessellateOperator
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{
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public: // static methods
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/**
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* Tessellates a straight line into multiple segments.
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*/
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static void tessellateLinear(
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const osg::Vec3d& p0,
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const osg::Vec3d& p1,
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unsigned parts,
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std::vector<osg::Vec3d>& out );
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/**
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* Tessellates a geographic line (great circle or rhumb) between
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* two geographic points (long,lat,alt) into multiple segments along
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* a spheroid.
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*/
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static void tessellateGeo(
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const osg::Vec3d& p0,
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const osg::Vec3d& p1,
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unsigned parts,
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GeoInterpolation interp,
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std::vector<osg::Vec3d>& out );
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public:
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/**
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* Constructs a new tessellation operator.
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*/
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TessellateOperator();
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virtual ~TessellateOperator() { }
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/**
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* Sets the maximum size of each tessellated partition in the geometry.
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* The "numPartitions" is calculated from this value.
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*/
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void setMaxPartitionSize( const Distance& value ) { _maxDistance = value; }
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void setNumPartitions( unsigned value ) { _numPartitions = value; }
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void setDefaultGeoInterp( GeoInterpolation value ) { _defaultInterp = value; }
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public:
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/**
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* Operate on a feature
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*/
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void operator()( Feature* feature, FilterContext& context ) const;
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FilterContext push(FeatureList& input, FilterContext& context) const;
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protected:
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optional<Distance> _maxDistance;
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unsigned _numPartitions;
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GeoInterpolation _defaultInterp;
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};
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} }
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#endif // OSGEARTHFEATURES_TESSELLATE_OPERATOR_H
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