71 lines
2.1 KiB
C++
71 lines
2.1 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_FRONTFACE
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#define OSG_FRONTFACE 1
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#include <osg/StateAttribute>
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#include <osg/GL>
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namespace osg {
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/** Class to specify the orientation of front-facing polygons.
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*/
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class OSG_EXPORT FrontFace : public StateAttribute
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{
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public :
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enum Mode {
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CLOCKWISE = GL_CW,
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COUNTER_CLOCKWISE = GL_CCW
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};
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FrontFace(Mode face=COUNTER_CLOCKWISE);
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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FrontFace(const FrontFace& ff,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(ff,copyop),
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_mode(ff._mode) {}
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META_StateAttribute(osg, FrontFace, FRONTFACE);
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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 the types are equal and then create the rhs variable
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// used by the COMPARE_StateAttribute_Parameter macros below.
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COMPARE_StateAttribute_Types(FrontFace,sa)
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// compare each parameter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_mode)
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return 0; // passed all the above comparison macros, must be equal.
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}
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inline void setMode(Mode mode) { _mode = mode; }
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inline Mode getMode() const { return _mode; }
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virtual void apply(State& state) const;
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protected:
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virtual ~FrontFace();
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Mode _mode;
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};
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}
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#endif
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