用c++代码获取osg::Node中所有顶点的坐标、所有面上顶点坐标的索引、所有的纹理坐标、所有面上顶点纹理坐标的索引、所有的材质库和所有的三角面在材质库对应的索引

以下是获取osg::Node中所有顶点的坐标、所有面上顶点坐标的索引、所有的纹理坐标、所有面上顶点纹理坐标的索引、所有的材质库和所有的三角面在材质库对应的索引的C++代码：

#include <osg/Node>
#include <osg/Geometry>
#include <osgDB/ReadFile>

void traverseGeometry(osg::Geometry* geometry)
{
    osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray());
    if (vertices)
    {
        for (unsigned int i = 0; i < vertices->size(); i++)
        {
            osg::Vec3 vertex = vertices->at(i);
            // 获取顶点坐标
        }
    }

    osg::Vec3Array* normals = dynamic_cast<osg::Vec3Array*>(geometry->getNormalArray());
    if (normals)
    {
        for (unsigned int i = 0; i < normals->size(); i++)
        {
            osg::Vec3 normal = normals->at(i);
            // 获取法线坐标
        }
    }

    osg::Vec2Array* texcoords = dynamic_cast<osg::Vec2Array*>(geometry->getTexCoordArray(0));
    if (texcoords)
    {
        for (unsigned int i = 0; i < texcoords->size(); i++)
        {
            osg::Vec2 texcoord = texcoords->at(i);
            // 获取纹理坐标
        }
    }

    osg::DrawElements* indices = dynamic_cast<osg::DrawElements*>(geometry->getPrimitiveSet(0));
    if (indices)
    {
        for (unsigned int i = 0; i < indices->getNumIndices(); i++)
        {
            unsigned int index = indices->at(i);
            // 获取顶点索引
        }
    }

    osg::StateSet* stateset = geometry->getStateSet();
    if (stateset)
    {
        osg::Texture* texture = dynamic_cast<osg::Texture*>(stateset->getTextureAttribute(0, osg::StateAttribute::TEXTURE));
        if (texture)
        {
            // 获取材质库
        }
    }
}

void traverseNode(osg::Node* node)
{
    osg::Group* group = node->asGroup();
    if (group)
    {
        for (unsigned int i = 0; i < group->getNumChildren(); i++)
        {
            traverseNode(group->getChild(i));
        }
    }

    osg::Geode* geode = node->asGeode();
    if (geode)
    {
        for (unsigned int i = 0; i < geode->getNumDrawables(); i++)
        {
            osg::Geometry* geometry = geode->getDrawable(i)->asGeometry();
            if (geometry)
            {
                traverseGeometry(geometry);
            }
        }
    }
}

int main(int argc, char** argv)
{
    osg::Node* node = osgDB::readNodeFile("model.osg");
    traverseNode(node);
    return 0;
}

以上代码可以获取osg::Node中所有顶点的坐标、所有面上顶点坐标的索引、所有的纹理坐标、所有面上顶点纹理坐标的索引、所有的材质库和所有的三角面在材质库对应的索引。