osg绘制闭合曲线

osg绘制闭合曲线

osg::TessellationHints* outline_hits1 = new osg::TessellationHints();
outline_hits1->setDetailRatio(0.9f);


osg::Geode* outline_geode = new osg::Geode();
osg::Geode* outline_node_geode = new osg::Geode();

osg::Geometry* outline_geometry = new osg::Geometry();
osg::ref_ptr<osg::Group> outline_group = new osg::Group;

//设置顶点数据
outline_geometry->setVertexArray(outline_vec3array);

//设置法线
osg::Vec3Array* outline_normal = new osg::Vec3Array();
outline_normal->push_back(osg::Vec3(0.0f, 1.0f, 1.0f));
outline_geometry->setNormalArray(outline_normal);
outline_geometry->setNormalBinding(osg::Geometry::BIND_OVERALL);

outline_geode->addDrawable(outline_geometry);


//设置材质
osg::ref_ptr<osg::Material> outline_material = new osg::Material;
{
    //设置环境光
    outline_material->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(1.0, 0.7, 0.0, 1.0));
    //设置散射光
    outline_material->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(1.0, 1.0, 1.0, 1.0));
    //设置镜面光
    outline_material->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(1.0, 1.0, 1.0, 1.0));
    //设置幅射光
    outline_material->setShininess(osg::Material::FRONT_AND_BACK, 60.0);
}

osg::ref_ptr<osg::StateSet> outline_stateset = outline_geode->getOrCreateStateSet();
osg::ref_ptr<osg::LineWidth> outline_lineWidth = new osg::LineWidth(100.0f);
outline_stateset->setAttribute(outline_lineWidth);
outline_geometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP, 0, outline_final_vecs.size()));
//设置材质
outline_geometry->getOrCreateStateSet()->setAttributeAndModes(outline_material, osg::StateAttribute::ON);


if (m_root !=nullptr)
{
    
    outline_group->addChild(outline_geode);
    outline_group->addChild(outline_node_geode);
    m_root->addChild(outline_group.get());
}

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