/* -*-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_BLENDCOLOR #define OSG_BLENDCOLOR 1 #include #include #include #include namespace osg { /** Encapsulates OpenGL blend/transparency state. */ class OSG_EXPORT BlendColor : public StateAttribute { public : BlendColor(); BlendColor(const osg::Vec4& constantColor); /** Copy constructor using CopyOp to manage deep vs shallow copy.*/ BlendColor(const BlendColor& trans,const CopyOp& copyop=CopyOp::SHALLOW_COPY): StateAttribute(trans,copyop), _constantColor(trans._constantColor) {} META_StateAttribute(osg, BlendColor,BLENDCOLOR); /** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */ virtual int compare(const StateAttribute& sa) const { // Check for equal types, then create the rhs variable // used by the COMPARE_StateAttribute_Parameter macros below. COMPARE_StateAttribute_Types(BlendColor,sa) // Compare each parameter in turn against the rhs. COMPARE_StateAttribute_Parameter(_constantColor) return 0; // Passed all the above comparison macros, so must be equal. } virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const { usage.usesMode(GL_BLEND); return true; } void setConstantColor(const osg::Vec4& color) { _constantColor = color; } inline osg::Vec4& getConstantColor() { return _constantColor; } inline const osg::Vec4& getConstantColor() const { return _constantColor; } virtual void apply(State& state) const; protected : virtual ~BlendColor(); osg::Vec4 _constantColor; }; } #endif