osg::Geometry *lineStripGeometry = new osg::Geometry;

    osg::Vec3Array *lineVertexArray = new osg::Vec3Array;

    double dRadius = 0.1;

    for (float angle = 0.0; angle < 400.0; angle += 0.1)

    {

        lineVertexArray->push_back(osg::Vec3(dRadius * cos(angle), dRadius * sin(angle), ));

        dRadius *= 1.002;

    }

    osg::Vec4Array *lineColorArray = new osg::Vec4Array;

    lineColorArray->push_back(osg::Vec4(1.0, 1.0, 1.0, 1.0));

    lineStripGeometry->setVertexArray(lineVertexArray);

    lineStripGeometry->setColorArray(lineColorArray);

    //OSG 3.2之后的版本在setColorArray中设置绑定方式

    lineStripGeometry->setColorBinding(osg::Geometry::BIND_OVERALL);

    lineStripGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP, , lineVertexArray->size()));

    lineStripGeometry->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);

    //添加模板测试

        osg::Stencil *lineStripStencil = new osg::Stencil;

    lineStripStencil->setFunction(osg::Stencil::NEVER, 0x0, 0x0);

    lineStripStencil->setOperation(osg::Stencil::INCR, osg::Stencil::INCR, osg::Stencil::INCR);

    lineStripGeometry->getOrCreateStateSet()->setAttributeAndModes(lineStripStencil);

    //////////////////////////////////////////////////////////////////////////

    osg::Geometry *quadGeometry = new osg::Geometry;

    osg::Vec3Array *quadVertexArray = new osg::Vec3Array;

    quadVertexArray->push_back(osg::Vec3(, , ));

    quadVertexArray->push_back(osg::Vec3(, , ));

    quadVertexArray->push_back(osg::Vec3(, , ));

    quadVertexArray->push_back(osg::Vec3(, , ));

    osg::Vec4Array *quadColorArray = new osg::Vec4Array;

    quadColorArray->push_back(osg::Vec4(0.0, 1.0, 1.0, 1.0));

    quadGeometry->setVertexArray(quadVertexArray);

    quadGeometry->setColorArray(quadColorArray);

    quadGeometry->setColorBinding(osg::Geometry::BIND_OVERALL);

    quadGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, , ));

    quadGeometry->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);

    osg::Stencil *quadStencil = new osg::Stencil;

    quadStencil->setFunction(osg::Stencil::NOTEQUAL, 0x1, 0x1);

    quadStencil->setOperation(osg::Stencil::KEEP, osg::Stencil::KEEP, osg::Stencil::KEEP);

    quadGeometry->getOrCreateStateSet()->setAttributeAndModes(quadStencil);

    osg::Geode *geode = new osg::Geode;

    geode->addDrawable(lineStripGeometry);

    geode->addDrawable(quadGeometry);

---------------------

作者：csxiaoshui

来源：CSDN

原文：https://blog.csdn.net/csxiaoshui/article/details/23457273

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