c++omnet++inet

About Changing Display Strings at Runtime to Modify the Location of Nodes in Simulation

In a planar simulation scenario, I can modify the position of nodes by using getDisplayString() ->setTagArg.

 cModule* parents = getParentModule();  //找到应用层app是UdpSink的节点
    auto dispStr = parents->getDisplayString();  //显示字符串
    std::cout<<dispStr<<std::endl;
    double x_coord = atof(dispStr.getTagArg("p", 0));
    double y_coord=  atof(dispStr.getTagArg("p", 1));
    double z_coord=  atof(dispStr.getTagArg("p", 2));
    //更新移动节点的位置
    dispStr.setTagArg("p", 0, std::to_string(x).c_str());
    dispStr.setTagArg("p", 1, std::to_string(y).c_str());
    dispStr.setTagArg("p", 2, std::to_string(z).c_str());
    parents->setDisplayString(dispStr.str());
    std::cout<<x_coord<<std::endl;

"However, my simulation requires a 3D scene, so I modeled the example of showcases/mobility/spatial and set the scene of" Integrated OsgVisualizer "under OSG, but I printed the display string of the node."

auto dispStr = parents->getDisplayString();  // display string
std::cout<<dispStr<<std::endl;

It appears to have no p attribute. Is it like this? Therefore, I cannot update the node position in a 3D scene in this way now. If I want to continue through this method, what should I do. I hope to receive your advice and help. Thank you

Solution

  • You can add the tag that you require using insertTag(), for example:

    cModule* parents = getParentModule();
auto &dispStr = parents->getDisplayString();
dispStr.insertTag("p");
dispStr.setTagArg("p", 0, x); // x is int
dispStr.setTagArg("p", 1, y);

    Notes: