/usr/include/osg/LightModel 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 91 92 93 94 95 | /* -*-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_LIGHTMODEL
#define OSG_LIGHTMODEL 1
#include <osg/StateAttribute>
#include <osg/Vec4>
namespace osg {
class OSG_EXPORT LightModel : public StateAttribute
{
    public :
        LightModel();
        /** Copy constructor using CopyOp to manage deep vs shallow copy. */
        LightModel(const LightModel& lw,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
          StateAttribute(lw,copyop),
          _ambient(lw._ambient),
          _colorControl(lw._colorControl),
          _localViewer(lw._localViewer),
          _twoSided(lw._twoSided) {}
        META_StateAttribute(osg, LightModel, LIGHTMODEL);
        /** 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(LightModel,sa)
            // compare each parameter in turn against the rhs.
            COMPARE_StateAttribute_Parameter(_ambient)
            COMPARE_StateAttribute_Parameter(_colorControl)
            COMPARE_StateAttribute_Parameter(_localViewer)
            COMPARE_StateAttribute_Parameter(_twoSided)
            return 0; // passed all the above comparison macros, must be equal.
        }
        void setAmbientIntensity(const osg::Vec4& ambient) { _ambient = ambient; }
        const osg::Vec4& getAmbientIntensity() const { return _ambient; }
        enum ColorControl
        {
            SEPARATE_SPECULAR_COLOR,
            SINGLE_COLOR
        };
        void setColorControl(ColorControl cc) { _colorControl = cc; }
        inline ColorControl getColorControl() const { return _colorControl; }
        void setLocalViewer(bool localViewer) { _localViewer=localViewer; }
        inline bool getLocalViewer() const { return _localViewer; }
        void setTwoSided(bool twoSided) { _twoSided = twoSided; }
        inline bool getTwoSided() const { return _twoSided; }
        virtual void apply(State& state) const;
    protected :
        virtual ~LightModel();
        osg::Vec4 _ambient;
        ColorControl _colorControl;
        bool _localViewer;
        bool _twoSided;
};
}
#endif
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