ec4f898bce
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14582 16af8721-9629-0410-8352-f15c8da7e697
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/* -*-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_BLENDCOLOR
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#define OSG_BLENDCOLOR 1
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#include <osg/GL>
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#include <osg/StateAttribute>
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#include <osg/ref_ptr>
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#include <osg/Vec4>
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namespace osg {
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/** Encapsulates OpenGL blend/transparency state. */
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class OSG_EXPORT BlendColor : public StateAttribute
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{
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public :
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BlendColor();
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BlendColor(const osg::Vec4& constantColor);
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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BlendColor(const BlendColor& trans,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(trans,copyop),
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_constantColor(trans._constantColor) {}
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META_StateAttribute(osg, BlendColor,BLENDCOLOR);
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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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{
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// Check for equal types, then create the rhs variable
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// used by the COMPARE_StateAttribute_Parameter macros below.
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COMPARE_StateAttribute_Types(BlendColor,sa)
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// Compare each parameter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_constantColor)
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return 0; // Passed all the above comparison macros, so must be equal.
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}
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virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const
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{
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usage.usesMode(GL_BLEND);
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return true;
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}
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void setConstantColor(const osg::Vec4& color) { _constantColor = color; }
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inline osg::Vec4& getConstantColor() { return _constantColor; }
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inline const osg::Vec4& getConstantColor() const { return _constantColor; }
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virtual void apply(State& state) const;
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protected :
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virtual ~BlendColor();
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osg::Vec4 _constantColor;
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};
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}
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#endif
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