PolygonOffset
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/* -*-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 {
class OSG_EXPORT PolygonOffset : public StateAttribute
{
public :
PolygonOffset();
PolygonOffset(float factor, float units);
PolygonOffset(const PolygonOffset& po,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
StateAttribute(po,copyop),
_factor(po._factor),
_units(po._units) {}
META_StateAttribute(osg, PolygonOffset, POLYGONOFFSET);
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();
static void setFactorAndUnitsMultipliersUsingBestGuessForDriver();
protected :
virtual ~PolygonOffset();
float _factor;
float _units;
};
}
#endif
GL_POLYGON_OFFSET_LINE
#define GL_POLYGON_OFFSET_LINE
Definition PolygonOffset:20
GL_POLYGON_OFFSET_POINT
#define GL_POLYGON_OFFSET_POINT
Definition PolygonOffset:21
StateAttribute
COMPARE_StateAttribute_Parameter
#define COMPARE_StateAttribute_Parameter(parameter)
Definition StateAttribute:69
COMPARE_StateAttribute_Types
#define COMPARE_StateAttribute_Types(TYPE, rhs_attribute)
Definition StateAttribute:57
osg::CopyOp
Definition CopyOp:41
osg::CopyOp::SHALLOW_COPY
@ SHALLOW_COPY
Definition CopyOp:47
osg::PolygonOffset::compare
virtual int compare(const StateAttribute &sa) const
Definition PolygonOffset:44
osg::PolygonOffset::PolygonOffset
PolygonOffset()
osg::PolygonOffset::_units
float _units
Definition PolygonOffset:93
osg::PolygonOffset::areFactorAndUnitsMultipliersSet
static bool areFactorAndUnitsMultipliersSet()
osg::PolygonOffset::~PolygonOffset
virtual ~PolygonOffset()
osg::PolygonOffset::getFactorMultiplier
static float getFactorMultiplier()
osg::PolygonOffset::getUnitsMultiplier
static float getUnitsMultiplier()
osg::PolygonOffset::getModeUsage
virtual bool getModeUsage(StateAttribute::ModeUsage &usage) const
Definition PolygonOffset:57
osg::PolygonOffset::PolygonOffset
PolygonOffset(float factor, float units)
osg::PolygonOffset::setUnits
void setUnits(float units)
Definition PolygonOffset:70
osg::PolygonOffset::setFactor
void setFactor(float factor)
Definition PolygonOffset:67
osg::PolygonOffset::META_StateAttribute
META_StateAttribute(osg, PolygonOffset, POLYGONOFFSET)
osg::PolygonOffset::setFactorMultiplier
static void setFactorMultiplier(float multiplier)
osg::PolygonOffset::getFactor
float getFactor() const
Definition PolygonOffset:68
osg::PolygonOffset::PolygonOffset
PolygonOffset(const PolygonOffset &po, const CopyOp &copyop=CopyOp::SHALLOW_COPY)
Definition PolygonOffset:36
osg::PolygonOffset::getUnits
float getUnits() const
Definition PolygonOffset:71
osg::PolygonOffset::_factor
float _factor
Definition PolygonOffset:92
osg::PolygonOffset::apply
virtual void apply(State &state) const
osg::PolygonOffset::setFactorAndUnitsMultipliersUsingBestGuessForDriver
static void setFactorAndUnitsMultipliersUsingBestGuessForDriver()
osg::PolygonOffset::setUnitsMultiplier
static void setUnitsMultiplier(float multiplier)
osg::StateAttribute::StateAttribute
StateAttribute()
osg::StateAttribute::POLYGONOFFSET
@ POLYGONOFFSET
Definition StateAttribute:128
osg::State
Definition State:80
osg
Definition AlphaFunc:19
OSG_EXPORT
#define OSG_EXPORT
Definition osg/Export:39
osg::StateAttribute::ModeUsage
Definition StateAttribute:308
osg::StateAttribute::ModeUsage::usesMode
virtual void usesMode(GLMode mode)=0