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80 lines
2.5 KiB
80 lines
2.5 KiB
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield |
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* |
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* This library is open source and may be redistributed and/or modified under |
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
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* (at your option) any later version. The full license is in LICENSE file |
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* included with this distribution, and on the openscenegraph.org website. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* OpenSceneGraph Public License for more details. |
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*/ |
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#ifndef OSG_POINTSPRITE |
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#define OSG_POINTSPRITE 1 |
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#include <osg/GL> |
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#include <osg/StateAttribute> |
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#ifndef GL_ARB_point_sprite |
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#define GL_POINT_SPRITE_ARB 0x8861 |
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#define GL_COORD_REPLACE_ARB 0x8862 |
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#endif |
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#ifndef GL_POINT_SPRITE_COORD_ORIGIN |
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#define GL_POINT_SPRITE_COORD_ORIGIN 0x8CA0 |
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#define GL_LOWER_LEFT 0x8CA1 |
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#define GL_UPPER_LEFT 0x8CA2 |
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#endif |
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namespace osg { |
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/** PointSprite base class which encapsulates enabling of point sprites .*/ |
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class OSG_EXPORT PointSprite : public osg::StateAttribute { |
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public: |
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PointSprite(); |
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/ |
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PointSprite(const PointSprite& ps,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY): |
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StateAttribute(ps,copyop), |
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_coordOriginMode(ps._coordOriginMode) {} |
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META_StateAttribute(osg, PointSprite, POINTSPRITE); |
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/** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.*/ |
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virtual int compare(const StateAttribute& sa) const; |
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virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const |
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{ |
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usage.usesMode(GL_POINT_SPRITE_ARB); |
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return true; |
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} |
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virtual bool checkValidityOfAssociatedModes(osg::State&) const; |
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virtual bool isTextureAttribute() const { return true; } |
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virtual void apply(osg::State& state) const; |
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static bool isPointSpriteSupported(unsigned int context); |
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enum CoordOriginMode { |
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UPPER_LEFT = GL_UPPER_LEFT, |
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LOWER_LEFT = GL_LOWER_LEFT |
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}; |
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inline void setCoordOriginMode(CoordOriginMode mode) { _coordOriginMode = mode; } |
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inline CoordOriginMode getCoordOriginMode() const { return _coordOriginMode; } |
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protected: |
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virtual ~PointSprite(); |
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CoordOriginMode _coordOriginMode; |
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}; |
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} |
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#endif
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