Unity Development: UDP network communication between Qt C + + and unity

Try UDP communication again, send faster, more flexible

UDP is actually equivalent to peer communication, without a resume connection, but here in order to have a server concept, the service side bound port, and the client is sent randomly allocated port

Qt C + + service side

Resume GUI project, Pro inside Add Network module, interface put a label, two button

Widget.h

#ifndef widget_h#define widget_h#include <QWidget> #include <qudpsocket>namespace Ui {class WIDGET;} Class Widget:public qwidget{    q_objectpublic:    explicit Widget (Qwidget *parent = 0);    ~widget ();p rivate:    ui::widget *ui;private:    QString statustext;//status information    qudpsocket *udpsocket;//Socket    Qhostaddress ClientIP; Client IP    quint16 clientport;//client Port    void Socketsend (QString sendstr,qhostaddress targetip,quint16 Targetport); Send data that can be sent to the specified target, or broadcast private slots:    void Processpendingdatagram (),///////When receiving data,    void on_leftbtn_clicked ( );    void on_rightbtn_clicked ();}; #endif//Widget_h

Widget.cpp

#include "widget.h" #include "ui_widget.h" Widget::widget (Qwidget *parent): Qwidget (parent), UI (new Ui::widget) {u    I->SETUPUI (this);    Initialize UDP udpsocket=new qudpsocket (this); Udpsocket->bind (qhostaddress::any,8888);//Bind IP and port, can be any,localhost//label display status statustext=statustext+ "wait for    Connecting ... "+" \ n ";    Ui->statuslabel->settext (statustext); Bind the signal slot to react when the data is received connect (udpsocket,signal (Readyread ()), This,slot (Processpendingdatagram ()));} void Widget::P rocesspendingdatagram () {//waits for data to be received before processing while (Udpsocket->haspendingdatagrams ()) {Qbytear        Ray RecvData;        Recvdata.resize (Udpsocket->pendingdatagramsize ()); Udpsocket->readdatagram (Recvdata.data (), Recvdata.size (), &clientip,&clientport);         Read the data from the sender's package and the IP and port and assign the variable to the class statustext+= "Connet from" +clientip.tostring () + ":" +qstring::number (ClientPort) + "";        Statustext+=recvdata+ "\ n"; Display to Status label Ui->statuslabel->settext (statustext);    Forward back Socketsend ("From server:" +recvdata,clientip,clientport); }}void widget::socketsend (QString sendstr,qhostaddress targetip,quint16 targetport) {Udpsocket->writedatagram ( Sendstr.tostdstring (). C_STR (), Sendstr.length (), targetip,targetport); Widget::~widget () {Delete UI;} Unity object left-handed void widget::on_leftbtn_clicked () {socketsend ("leftrotate", Clientip,clientport);} Unity object Right-handed void widget::on_rightbtn_clicked () {socketsend ("rightrotate", Clientip,clientport);}

Main.cpp not changed, did not post

Unity C # Client

The same thing. The UDP socket part is encapsulated into a class, added to another class, and hung into the scene.

UdpClientHandler.cs

Using unityengine;using system.collections;//using system.net;using system.net.sockets;using System.Text;using System.threading;public class udpclienthandler:monobehaviour{//The following default are private members of the socket socket;//target Socket EndPoint SE Rverend; Service End IPEndPoint Ipend; Server-side port string recvstr; Received string sendstr; Sent string byte[] recvdata=new byte[1024]; The data received must be byte byte[] senddata=new byte[1024]; The data that is sent must be byte int recvlen; The received data length is Thread connectthread; Connection thread//Initialize public void Initsocket () {///define connected server IP and port, can be native IP, LAN, Internet ipend=new IPEndPoint (ipaddr Ess.        Parse ("127.0.0.1"), 8888);        Defines the socket type and defines the socket=new socket (ADDRESSFAMILY.INTERNETWORK,SOCKETTYPE.DGRAM,PROTOCOLTYPE.UDP) in the main thread;        Define the service-side IPEndPoint sender=new IPEndPoint (ipaddress.any,0);        serverend= (EndPoint) sender;        Print ("Waiting for sending UDP dgram");        To establish the initial connection, it is very important that the first connection is initialized after the serverend to receive the message socketsend ("Hello"); Open a thread connection, must, otherwise the main thread card dies connectthread=new thread (new ThreadStart (socketreceive));    Connectthread.start ();        } public void Socketsend (string sendstr) {//empty send cache senddata=new byte[1024];        Data type conversion senddata=encoding.ascii.getbytes (SENDSTR); Sent to the specified service-side socket.    SendTo (Senddata,senddata.length,socketflags.none,ipend); }//The server receives void Socketreceive () {//Enters receive loop while (true) {//To data clear 0 recv            Data=new byte[1024]; Get the client, get the service end data, assign a value to the server by reference, in fact the server is already defined and does not need to assign a value recvlen=socket.            ReceiveFrom (Recvdata,ref serverend); Print ("Message from:" +serverend.tostring ());            Print Service-side information//output received data recvstr=encoding.ascii.getstring (Recvdata,0,recvlen);        Print (RECVSTR);        }}//Returns the received string, public string Getrecvstr () {string returnstr;        Lock prevents the string from being changed to lock (this) {returnstr=recvstr; } return RETURNSTR; }//Connection off public void Socketquit () {//Close thread if (connectthread!=null) {Connectthre Ad.            Interrupt ();        Connectthread.abort (); }//finally close the socket if (socket!=null) socket.    Close (); }}

UdpTest.cs

Using Unityengine;using system.collections;public class udptest:monobehaviour{string editstring= "Hello wolrd";//edit box    Word gameobject cube;    Udpclienthandler UdpClient; Use of this for initialization void Start () {//Initialize network Udpclient=gameobject.addcomponent<udpclientha        Ndler> ();        Udpclient.initsocket ();    Find Cube Cube=gameobject.find ("Cube"); } void Ongui () {Editstring=gui.        TextField (New Rect (10,10,100,20), editstring); Gui.        Label (New Rect (10,30,300,20), Udpclient.getrecvstr ()); if (GUI.    button (new Rect (10,50,60,20), "send")) Udpclient.socketsend (editstring);            }//update is called once per frame void Update () {if (Udpclient.getrecvstr ()!=null) { Switch (UDPCLIENT.GETRECVSTR ()) {case "leftrotate": Cube.transform.Rotate (Vec                    Tor3.up,50*time.deltatime);                Break             Case "Rightrotate":       Cube.transform.Rotate (Vector3.down,50*time.deltatime);            Break    }}} void Onapplicationquit () {//exit close connection Udpclient.socketquit (); }}

Test

is still the service side and the client to send and receive messages to each other, the server can control the cube rotation inside the client

Unity Development: UDP network communication between Qt C + + and unity