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88 lines
3.4 KiB
88 lines
3.4 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_VERTEXATTRIBDIVISOR
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#define OSG_VERTEXATTRIBDIVISOR 1
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#include <osg/StateAttribute>
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#include <osg/Vec3>
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#include <osg/Vec4>
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namespace osg {
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/** VertexAttribDivisor state class which encapsulates OpenGL glVertexAttribDivisor() functionality. */
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class OSG_EXPORT VertexAttribDivisor : public StateAttribute
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{
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public :
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VertexAttribDivisor();
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VertexAttribDivisor(unsigned int index, unsigned int divisor);
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/** Copy constructor using CopyOp to manage deep vs shallow copy. */
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VertexAttribDivisor(const VertexAttribDivisor& vad,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(vad,copyop),
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_index(vad._index),
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_divisor(vad._divisor) {}
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virtual osg::Object* cloneType() const { return new VertexAttribDivisor(_index, 0); }
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virtual osg::Object* clone(const osg::CopyOp& copyop) const { return new VertexAttribDivisor(*this,copyop); }
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virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const VertexAttribDivisor *>(obj)!=NULL; }
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virtual const char* libraryName() const { return "osg"; }
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virtual const char* className() const { return "VertexAttribDivisor"; }
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virtual Type getType() const { return VERTEX_ATTRIB_DIVISOR; }
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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(VertexAttribDivisor,sa)
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// compare each parameter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_index)
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COMPARE_StateAttribute_Parameter(_divisor)
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return 0; // passed all the above comparison macros, must be equal.
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}
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virtual unsigned int getMember() const { return _index; }
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/** Set the vertex attrib index - the vertex attribute slot that the divisor should apply to. */
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inline void setIndex( unsigned int index ) { _index = index; }
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/** Get the vertex attrib index. */
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inline unsigned int getIndex() const { return _index; }
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/** Set the vertex attrib divisor. */
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inline void setDivisor( unsigned int divisor ) { _divisor = divisor; }
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/** Get the vertex attrib divisor. */
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inline unsigned int getDivisor() const { return _divisor; }
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/** Apply to the OpenGL state machine. */
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virtual void apply(State& state) const;
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protected :
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virtual ~VertexAttribDivisor();
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unsigned int _index;
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unsigned int _divisor;
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};
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}
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#endif
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