Geode复制后的显示问题

kingsteeve

我把Geode复制一个后叫Geode1，改变Geode1的polyMode属性，然后把node1 add到node的父节点上，想使得Geode1显示线框而Geode的显示不变，为什么这时候Geode1把Geode覆盖看不见了？貌似是跟复制过来后的stateset有关系，我尝试了各种深度拷贝，如果复制过来的Geode1的stateset地址和父子关系跟Geode一样，则两者的代码谁放在后面谁就有覆盖作用。如果eode1的stateset地址和父子关系跟Geode不一样，则Geode1就无法显示，我不知道是为什么？我的代码如下：

osg::Geode *pGeode1 = dynamic_cast<osg::Geode*>(m_graphObject);
osg::Geode *pGeode = new osg::Geode(*pGeode1, osg::CopyOp:EEP_COPY_NODES);
pGeode1->getParent(0)->addChild(pGeode);
if (pGeode)
{
        osg::StateSet *pStateSet1 = pGeode->getorCreateStateSet();
        osg:olygonOffset* polyOffset = new osg::PolygonOffset;
        polyOffset->setFactor(-1.0f);
        polyOffset->setUnits(-1.0f);  

        osg::PolygonMode* polyMode = new osg::PolygonMode;
        polyMode->setMode(osg::PolygonMode::FRONT_AND_BACK, osg::PolygonMode:INE);
        pStateSet1->setAttributeAndModes(polyOffset, osg::StateAttribute::PROTECTED | osg::StateAttribute::ON);
        pStateSet1->setAttributeAndModes(polyMode, osg::StateAttribute::PROTECTED | osg::StateAttribute::ON);       

        osg::Material* material = new osg::Material;
        pStateSet1->setAttributeAndModes(material, osg::StateAttribute::ON); // switch glColor usage off
        // turn all lighting off
        material->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(0.0f,0.0f,1.0f,1.0f));
        material->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(0.0f,0.0f,1.0f,1.0f));
        material->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(0.0f,0.0f,1.0f,1.0f));
        // except emission... in which we set the color we desire
        material->setEmission(osg::Material::FRONT_AND_BACK, osg::Vec4(0.0f,0.0f,1.0f,1.0f));
        pStateSet1->setAttributeAndModes(material,osg::StateAttribute::PROTECTED|osg::StateAttribute::ON);
        pStateSet1->setMode(GL_LIGHTING,osg::StateAttribute::PROTECTED|osg::StateAttribute::OFF);
        pStateSet1->setTextureMode(0,GL_TEXTURE_2D,osg::StateAttribute::PROTECTED|osg::StateAttribute::OFF);
}

fenma3422

你要实现的效果可以参看osgFX：：Scribe其中用到了多边形偏移PolygonOffset

kingsteeve

fenma3422 发表于 2011-12-2 12:08
你要实现的效果可以参看osgFX：：Scribe其中用到了多边形偏移PolygonOffset

恩，好的，我试试。谢谢啦