80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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_POLYGONOFFSET
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#define OSG_POLYGONOFFSET 1
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#include <osg/StateAttribute>
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namespace osg {
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/** PolygonOffset - encapsulates the OpenGL glPolygonOffset state.*/
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class SG_EXPORT PolygonOffset : public StateAttribute
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{
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public :
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PolygonOffset();
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PolygonOffset(float factor, float units);
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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PolygonOffset(const PolygonOffset& po,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(po,copyop),
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_factor(po._factor),
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_units(po._units) {}
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META_StateAttribute(osg, PolygonOffset, POLYGONOFFSET);
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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_Paramter macro's below.
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COMPARE_StateAttribute_Types(PolygonOffset,sa)
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// compare each paramter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_factor)
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COMPARE_StateAttribute_Parameter(_units)
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return 0; // passed all the above comparison macro's, must be equal.
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}
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virtual bool getModeUsage(ModeUsage& usage) const
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{
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usage.usesMode(GL_POLYGON_OFFSET_FILL);
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usage.usesMode(GL_POLYGON_OFFSET_LINE);
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usage.usesMode(GL_POLYGON_OFFSET_POINT);
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return true;
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}
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inline void setFactor(float factor) { _factor = factor; }
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inline float getFactor() const { return _factor; }
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inline void setUnits(float units) { _units = units; }
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inline float getUnits() const { return _units; }
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virtual void apply(State& state) const;
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protected :
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virtual ~PolygonOffset();
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float _factor;
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float _units;
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};
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}
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#endif
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