In the osgWorks osgwTools library, TransparencyUtils.cpp, I enable transparency by first copying the original StateSet and saving it as UserData, then modifying the active StateSet to turn on transparency (BlendFunc, RenderBin, etc).
To disable transparency, I simply restore the original StateSet from UserData. -Paul On Fri, May 30, 2014 at 5:08 AM, sunpeng <[email protected]> wrote: > I use following code to set transparency: > > osg::StateSet* state = root->getOrCreateStateSet(); > > > state->setMode(GL_LIGHTING,osg::StateAttribute::OFF|osg::StateAttribute::PROTECTED); > > state->setMode(GL_BLEND,osg::StateAttribute::ON); > state->setMode(GL_DEPTH_TEST,osg::StateAttribute::ON); > state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN); > > osg::BlendColor* bc =new osg::BlendColor(osg::Vec4(1.0,1.0,1.0,0.0)); > osg::BlendFunc*bf = new osg::BlendFunc(); > state->setAttributeAndModes(bf,osg::StateAttribute::ON); > state->setAttributeAndModes(bc,osg::StateAttribute::ON); > bf->setSource(osg::BlendFunc::CONSTANT_ALPHA); > bf->setDestination(osg::BlendFunc::ONE_MINUS_CONSTANT_ALPHA); > bc->setConstantColor(osg::Vec4(1,1,1,0.5)); > > How to close transparency effect? I tried to use: > state->setMode(GL_BLEND,osg::StateAttribute::OFF); > state->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF); > > but it seems not work? > tks! > > peng > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- -Paul
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