/usr/include/osg/PolygonOffset is in libopenscenegraph-dev 3.0.1-4.
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 96 97 98 99 | /* -*-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_POLYGONOFFSET
#define OSG_POLYGONOFFSET 1
#include <osg/StateAttribute>
#ifndef GL_POLYGON_OFFSET_LINE
#define GL_POLYGON_OFFSET_LINE 0x2A02
#define GL_POLYGON_OFFSET_POINT 0x2A01
#endif
namespace osg {
/** PolygonOffset - encapsulates the OpenGL glPolygonOffset state.*/
class OSG_EXPORT PolygonOffset : public StateAttribute
{
public :
PolygonOffset();
PolygonOffset(float factor, float units);
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
PolygonOffset(const PolygonOffset& po,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
StateAttribute(po,copyop),
_factor(po._factor),
_units(po._units) {}
META_StateAttribute(osg, PolygonOffset, POLYGONOFFSET);
/** 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(PolygonOffset,sa)
// compare each parameter in turn against the rhs.
COMPARE_StateAttribute_Parameter(_factor)
COMPARE_StateAttribute_Parameter(_units)
return 0; // passed all the above comparison macros, must be equal.
}
virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const
{
usage.usesMode(GL_POLYGON_OFFSET_FILL);
#if !defined(OSG_GLES1_AVAILABLE) && !defined(OSG_GLES2_AVAILABLE)
usage.usesMode(GL_POLYGON_OFFSET_LINE);
usage.usesMode(GL_POLYGON_OFFSET_POINT);
#endif
return true;
}
inline void setFactor(float factor) { _factor = factor; }
inline float getFactor() const { return _factor; }
inline void setUnits(float units) { _units = units; }
inline float getUnits() const { return _units; }
virtual void apply(State& state) const;
static void setFactorMultiplier(float multiplier);
static float getFactorMultiplier();
static void setUnitsMultiplier(float multiplier);
static float getUnitsMultiplier();
static bool areFactorAndUnitsMultipliersSet();
/** Checks with the OpenGL driver to try and pick multiplier appropriate for the hardware.
note, requires a valid graphics context to be current. */
static void setFactorAndUnitsMultipliersUsingBestGuessForDriver();
protected :
virtual ~PolygonOffset();
float _factor;
float _units;
};
}
#endif
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