85 lines
2.3 KiB
C++
85 lines
2.3 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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#include <osg/ClipPlane>
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#include <osg/StateSet>
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#include <osg/Notify>
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using namespace osg;
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ClipPlane::ClipPlane()
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{
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_clipPlane.set(0.0,0.0,0.0,0.0);
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_clipPlaneNum = 0;
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}
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ClipPlane::~ClipPlane()
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{
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}
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void ClipPlane::setClipPlaneNum(unsigned int num)
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{
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if (_clipPlaneNum==num) return;
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if (_parents.empty())
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{
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_clipPlaneNum = num;
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return;
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}
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// take a reference to this clip plane to prevent it from going out of scope
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// when we remove it temporarily from its parents.
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osg::ref_ptr<ClipPlane> clipPlaneRef = this;
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// copy the parents as they _parents list will be changed by the subsequent removeAttributes.
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ParentList parents = _parents;
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// remove this attribute from its parents as its position is being changed
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// and would no longer be valid.
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ParentList::iterator itr;
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for(itr = parents.begin();
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itr != parents.end();
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++itr)
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{
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osg::StateSet* stateset = *itr;
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stateset->removeAttribute(this);
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}
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// assign the clip plane number
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_clipPlaneNum = num;
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// add this attribute back into its original parents with its new position
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for(itr = parents.begin();
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itr != parents.end();
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++itr)
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{
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osg::StateSet* stateset = *itr;
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stateset->setAttribute(this);
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}
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}
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unsigned int ClipPlane::getClipPlaneNum() const
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{
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return _clipPlaneNum;
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}
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void ClipPlane::apply(State&) const
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{
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#if defined(OSG_GL_FIXED_FUNCTION_AVAILABLE) && !defined(OSG_GLES1_AVAILABLE)
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glClipPlane((GLenum)(GL_CLIP_PLANE0+_clipPlaneNum),_clipPlane.ptr());
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#else
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OSG_NOTICE<<"Warning: ClipPlane::apply(State&) - not supported."<<std::endl;
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#endif
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}
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