/usr/include/osg/PolygonMode is in libopenscenegraph-3.4-dev 3.4.0+dfsg1-4+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 | /* -*-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 OSG_POLYGONMODE
#define OSG_POLYGONMODE 1
#include <osg/StateAttribute>
#include <osg/GL>
#if defined(OSG_GLES1_AVAILABLE) || defined(OSG_GLES2_AVAILABLE)
    #define GL_POINT    0x1B00
    #define GL_LINE     0x1B01
    #define GL_FILL     0x1B02
#endif
namespace osg {
/** State Class for setting OpenGL's polygon culling mode.
*/
class OSG_EXPORT PolygonMode : public StateAttribute
{
    public :
        enum Mode {
            POINT = GL_POINT,
            LINE = GL_LINE,
            FILL = GL_FILL
        };
        enum Face {
            FRONT_AND_BACK,
            FRONT,
            BACK
        };
        PolygonMode();
        PolygonMode(Face face,Mode mode);
        /** Copy constructor using CopyOp to manage deep vs shallow copy.*/
        PolygonMode(const PolygonMode& pm,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
            StateAttribute(pm,copyop),
            _modeFront(pm._modeFront),
            _modeBack(pm._modeBack) {}
        META_StateAttribute(osg, PolygonMode, POLYGONMODE);
        /** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.*/
        virtual int compare(const StateAttribute& sa) const
        {
            // check the types are equal and then create the rhs variable
            // used by the COMPARE_StateAttribute_Parameter macros below.
            COMPARE_StateAttribute_Types(PolygonMode,sa)
            // compare each parameter in turn against the rhs.
            COMPARE_StateAttribute_Parameter(_modeFront)
            COMPARE_StateAttribute_Parameter(_modeBack)
            return 0; // passed all the above comparison macros, must be equal.
        }
        void setMode(Face face,Mode mode);
        Mode getMode(Face face) const;
        inline bool getFrontAndBack() const { return _modeFront==_modeBack; }
        virtual void apply(State& state) const;
    protected:
        virtual ~PolygonMode();
        Mode _modeFront;
        Mode _modeBack;
};
}
#endif
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