64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 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_POINTSPRITE
|
|
#define OSG_POINTSPRITE 1
|
|
|
|
#include <osg/GL>
|
|
#include <osg/StateAttribute>
|
|
|
|
#ifndef GL_ARB_point_sprite
|
|
#define GL_POINT_SPRITE_ARB 0x8861
|
|
#define GL_COORD_REPLACE_ARB 0x8862
|
|
#endif
|
|
|
|
namespace osg {
|
|
|
|
/** PointSprite base class which encapsulates enabling of point sprites .*/
|
|
class OSG_EXPORT PointSprite : public osg::StateAttribute {
|
|
public:
|
|
|
|
PointSprite() {}
|
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
|
|
PointSprite(const PointSprite& texenv,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
|
|
StateAttribute(texenv,copyop) {}
|
|
|
|
|
|
META_StateAttribute(osg, PointSprite, POINTSPRITE);
|
|
|
|
/** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.*/
|
|
virtual int compare(const StateAttribute& sa) const;
|
|
|
|
virtual bool getModeUsage(ModeUsage& usage) const
|
|
{
|
|
usage.usesMode(GL_POINT_SPRITE_ARB);
|
|
return true;
|
|
}
|
|
|
|
virtual bool checkValididityOfAssociatedModes(osg::State&) const;
|
|
|
|
virtual bool isTextureAttribute() const { return true; }
|
|
|
|
virtual void apply(osg::State& state) const;
|
|
|
|
static bool isPointSpriteSupported(unsigned int context);
|
|
|
|
protected:
|
|
virtual ~PointSprite( void ) {}
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|