/usr/include/osgUtil/Simplifier is in libopenscenegraph-dev 3.2.1-6.
This file is owned by root:root, with mode 0o644.
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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 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library 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
* OpenSceneGraph Public License for more details.
*/
#ifndef OSGUTIL_SIMPLIFIER
#define OSGUTIL_SIMPLIFIER 1
#include <osg/NodeVisitor>
#include <osg/Geode>
#include <osg/Geometry>
#include <osgUtil/Export>
namespace osgUtil {
/** A simplifier for reducing the number of traingles in osg::Geometry.
*/
class OSGUTIL_EXPORT Simplifier : public osg::NodeVisitor
{
public:
Simplifier(double sampleRatio=1.0, double maximumError=FLT_MAX, double maximumLength=0.0);
META_NodeVisitor(osgUtil, Simplifier)
void setSampleRatio(float sampleRatio) { _sampleRatio = sampleRatio; }
float getSampleRatio() const { return _sampleRatio; }
/** Set the maximum point error that all point removals must be less than to permit removal of a point.
* Note, Only used when down sampling. i.e. sampleRatio < 1.0*/
void setMaximumError(float error) { _maximumError = error; }
float getMaximumError() const { return _maximumError; }
/** Set the maximum length target that all edges must be shorted than.
* Note, Only used when up sampling i.e. sampleRatio > 1.0.*/
void setMaximumLength(float length) { _maximumLength = length; }
float getMaximumLength() const { return _maximumLength; }
void setDoTriStrip(bool on) { _triStrip = on; }
bool getDoTriStrip() const { return _triStrip; }
void setSmoothing(bool on) { _smoothing = on; }
bool getSmoothing() const { return _smoothing; }
class ContinueSimplificationCallback : public osg::Referenced
{
public:
/** return true if mesh should be continued to be simplified, return false to stop simplification.*/
virtual bool continueSimplification(const Simplifier& simplifier, float nextError, unsigned int numOriginalPrimitives, unsigned int numRemainingPrimitives) const
{
return simplifier.continueSimplificationImplementation(nextError, numOriginalPrimitives, numRemainingPrimitives);
}
protected:
virtual ~ContinueSimplificationCallback() {}
};
void setContinueSimplificationCallback(ContinueSimplificationCallback* cb) { _continueSimplificationCallback = cb; }
ContinueSimplificationCallback* getContinueSimplificationCallback() { return _continueSimplificationCallback.get(); }
const ContinueSimplificationCallback* getContinueSimplificationCallback() const { return _continueSimplificationCallback.get(); }
bool continueSimplification(float nextError, unsigned int numOriginalPrimitives, unsigned int numRemainingPrimitives) const
{
if (_continueSimplificationCallback.valid()) return _continueSimplificationCallback->continueSimplification(*this, nextError, numOriginalPrimitives, numRemainingPrimitives);
else return continueSimplificationImplementation(nextError, numOriginalPrimitives, numRemainingPrimitives);
}
virtual bool continueSimplificationImplementation(float nextError, unsigned int numOriginalPrimitives, unsigned int numRemainingPrimitives) const
{
if (getSampleRatio()<1.0) return ((float)numRemainingPrimitives > ((float)numOriginalPrimitives) * getSampleRatio()) && nextError<=getMaximumError();
else return ((float)numRemainingPrimitives < ((float)numOriginalPrimitives) * getSampleRatio()) && nextError>getMaximumLength();
}
virtual void apply(osg::Geode& geode)
{
for(unsigned int i=0;i<geode.getNumDrawables();++i)
{
osg::Geometry* geometry = geode.getDrawable(i)->asGeometry();
if (geometry)
{
simplify(*geometry);
}
}
}
/** simply the geometry.*/
void simplify(osg::Geometry& geometry);
typedef std::vector<unsigned int> IndexList; /// a list of point indices
/** simply the geometry, whilst protecting key points from being modified.*/
void simplify(osg::Geometry& geometry, const IndexList& protectedPoints);
protected:
double _sampleRatio;
double _maximumError;
double _maximumLength;
bool _triStrip;
bool _smoothing;
osg::ref_ptr<ContinueSimplificationCallback> _continueSimplificationCallback;
};
}
#endif
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