105 lines
3.4 KiB
C++
105 lines
3.4 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 OSGEARTHFEATURES_POLYGONIZE_LINES_H
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#define OSGEARTHFEATURES_POLYGONIZE_LINES_H 1
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#include <osgEarth/Common>
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#include <osgEarth/Filter>
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#include <osgEarth/LineSymbol>
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#include <osgEarth/OsgGeometryOperator>
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#include <osg/Array>
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#include <osg/Geometry>
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namespace osgEarth { namespace Util
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{
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/**
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* Triangulates a line string into a buffered geometry.
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*
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* The resulting geometry will retain the original line string
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* vertices as a "spine", and will include triangles on either
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* side of the spine that form the buffered polygons. Depending
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* on the Stroke, the geometry may also have triangulated end caps.
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*/
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class OSGEARTH_EXPORT PolygonizeLinesOperator : public OsgGeometryOperator
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{
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public:
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/**
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* Construct the operator
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* @param[in ] stroke Line rendering properties
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*/
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PolygonizeLinesOperator(
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const LineSymbol* symbol);
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/**
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* Run the polygonizer.
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*
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* @param[in ] verts Line string geometry to polygonize. The polygonizer
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* will add this array to the resulting geometry.
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* @param[in ] normals Localized normals associated with the input verts.
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* Used to determine the plane in which to polygonize each
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* line segment. Optional; can be NULL
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* @param[in ] callback Called for each new point added to the polygonized line
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* with the source line index. Optional, call be NULL.
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* @param[in ] twosided Generate polygons on both sides of the center line.
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*
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* @return Triangulated geometry, including primitive set
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*/
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osg::Geometry* operator()(
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osg::Vec3Array* verts,
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osg::Vec3Array* normals,
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Callback* callback =0L, bool
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twosided =true) const;
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/**
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* Installs an auto-scaling shader on a stateset.
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*/
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void installShaders(osg::Node* node) const;
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protected:
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osg::ref_ptr<const LineSymbol> _line;
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friend class PolygonizeLinesFilter;
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};
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/**
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* Feature Filter that generates polygonized line geometry.
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*/
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class OSGEARTH_EXPORT PolygonizeLinesFilter : public FeaturesToNodeFilter
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{
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public:
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/** Constructs the filter with Style information */
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PolygonizeLinesFilter(const Style& style);
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public: // FeaturesToNodeFilter
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/** Pushes a list of features through the filter. */
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osg::Node* push( FeatureList& input, FilterContext& context );
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protected:
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Style _style;
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};
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} }
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#endif // OSGEARTHFEATURES_POLYGONIZE_LINES_H
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