/usr/include/osgEarthFeatures/BufferFilter is in libosgearth-dev 2.7.0+dfsg-2+b3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | /* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2015 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#ifndef OSGEARTHFEATURES_BUFFER_FILTER_H
#define OSGEARTHFEATURES_BUFFER_FILTER_H 1
#include <osgEarthFeatures/Common>
#include <osgEarthFeatures/Feature>
#include <osgEarthFeatures/Filter>
#include <osgEarthSymbology/Style>
#include <osg/Geode>
namespace osgEarth { namespace Features
{
using namespace osgEarth;
using namespace osgEarth::Symbology;
/**
* The buffer geometry operation takes each input vector shape and applies
* morphological dilation or erosion to it.
* (see http://en.wikipedia.org/wiki/Morphological_image_processing)
*
* The buffer distance determines which operation to use:
*
* A positive distance dilates the shape (expands it).
* A negative distance erodes the shape (shrinks it).
*
* Note: buffering always converts the input vector data into polygons.
*/
class OSGEARTHFEATURES_EXPORT BufferFilter : public FeatureFilter
{
public:
// Call this determine whether this filter is available. This filter uses
// the GEOS library, so you must compile osgEarth against GEOS for this
// filter to be available.
static bool isSupported();
public:
BufferFilter();
BufferFilter( const BufferFilter& rhs );
BufferFilter( const Config& conf );
/**
* Serialize this FeatureFilter
*/
virtual Config getConfig() const;
virtual ~BufferFilter() { }
public:
// how far to buffer; positive to dialate, negative to erode
optional<double>& distance() { return _distance; }
const optional<double>& distance() const { return _distance; }
// for ENDCAP_ROUND, controls the tessellation detail for corners,
// measured in the number of segments to create per 90 degrees
int numQuadrantSegments() const { return _numQuadSegs; }
int& numQuadrantSegments() { return _numQuadSegs; }
// tessellation style of buffered corners and line ends
const Stroke::LineCapStyle& capStyle() const { return _capStyle; }
Stroke::LineCapStyle& capStyle() { return _capStyle; }
public:
virtual FilterContext push( FeatureList& input, FilterContext& context );
protected:
optional<double> _distance;
int _numQuadSegs;
Stroke::LineCapStyle _capStyle;
};
} } // namespace osgEarth::Features
#endif // OSGEARTHFEATURES_BUFFER_FILTER_H
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