85 lines
2.4 KiB
C++
85 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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#if defined(_MSC_VER)
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#pragma warning( disable : 4786 )
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#endif
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#include <stdio.h>
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#include <list>
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#include <set>
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#include <osgUtil/DisplayRequirementsVisitor>
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using namespace osg;
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using namespace osgUtil;
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DisplayRequirementsVisitor::DisplayRequirementsVisitor()
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{
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setTraversalMode(NodeVisitor::TRAVERSE_ALL_CHILDREN);
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}
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void DisplayRequirementsVisitor::applyStateSet(StateSet& stateset)
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{
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if (!_ds) _ds = new osg::DisplaySettings;
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unsigned int min = 0; // assume stencil not needed by this stateset.
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if (stateset.getMode(GL_STENCIL_TEST) & StateAttribute::ON)
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{
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min = 1; // number stencil bits we need at least.
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}
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if (stateset.getAttribute(StateAttribute::STENCIL))
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{
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min = 1; // number stencil bits we need at least.
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}
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if (min>_ds->getMinimumNumStencilBits())
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{
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// only update if new minimum exceeds previous minimum.
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_ds->setMinimumNumStencilBits(min);
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}
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}
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void DisplayRequirementsVisitor::apply(Node& node)
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{
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osg::StateSet* stateset = node.getStateSet();
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if (stateset) applyStateSet(*stateset);
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if (strcmp(node.className(),"Impostor")==0)
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{
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if (!_ds) _ds = new osg::DisplaySettings;
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unsigned int min = 1; // number alpha bits we need at least.
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if (min>_ds->getMinimumNumAlphaBits())
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{
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// only update if new minimum exceeds previous minimum.
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_ds->setMinimumNumAlphaBits(min);
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}
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}
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traverse(node);
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}
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void DisplayRequirementsVisitor::apply(Geode& geode)
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{
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osg::StateSet* geode_stateset = geode.getStateSet();
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if (geode_stateset) applyStateSet(*geode_stateset);
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for(unsigned int i = 0; i < geode.getNumDrawables(); i++ )
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{
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osg::StateSet* stateset = geode.getDrawable(i)->getStateSet();
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if (stateset) applyStateSet(*stateset);
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}
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}
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