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

Consider implementing the server in C + +, unity does the client to implement TCP network communication.

The following TCP single-threaded connections are used.

Qt C + + service side

Set up a QT GUI project, put a label on the interface to display the connection status, two buttons as instructions to send control.

Remember to include the network module in the Pro file

Widget.h

#ifndef widget_h#define widget_h#include <qwidget>class qtcpserver;//Forward declaration class Qtcpsocket;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    qtcpserver *tcpserver;//Server    Qtcpsocket *clienttcpsocket; Client socket    void Socketsend (QString sendstr);p rivate slots:    void Socketconnet ();    void Socketreceive ();    void on_leftbtn_clicked ();    void on_rightbtn_clicked ();}; #endif//Widget_h

Widget.cpp

#include <QTcpServer> #include <QTcpSocket> #include <QAbstractSocket> #include <qdebug># Include "Widget.h" #include "ui_widget.h" Widget::widget (Qwidget *parent): Qwidget (parent), UI (new Ui::widget) {UI    -&GT;SETUPUI (this); Initialize the server and listen for tcpserver=new qtcpserver (this); QT own memory Management if (!tcpserver->listen (qhostaddress::any,6666))//Listen to all network addresses, Port 6666 qdebug () <<tcpserver->err    Orstring ();    statustext=statustext+ "Wait for connecting ..." + "\ n";    Ui->statuslabel->settext (statustext); Bind the signal slot when there is a connection to react to connect (tcpserver,signal (Newconnection ()), This,slot (Socketconnet ()));}    void Widget::socketconnet () {//Get client Socket clienttcpsocket=tcpserver->nextpendingconnection ();    Bind the signal slots, receive the data, and when the connection is off is delete the connection connect (clienttcpsocket,signal (Readyread ()), This,slot (Socketreceive ()));    Connect (clienttcpsocket,signal (disconnected ()), Clienttcpsocket,slot (Deletelater ())); Display Client connection Information QString CLIENTIP=CLIENTTCPSOCKET-&GT;PEERADDRESS (). toString ();    QString Clientport=qstring::number (Clienttcpsocket->peerport ());    statustext=statustext+ "conneted with" +clientip+ ":" +clientport+ "\ n"; Ui->statuslabel->settext (statustext);} void Widget::socketsend (QString sendstr) {clienttcpsocket->write (Sendstr.tostdstring (). C_STR ());}    void Widget::socketreceive () {//receives data and shows that the byte is converted into a string QString recvstr=clienttcpsocket->readall ();    Statustext=statustext+recvstr+ "\ n";    Ui->statuslabel->settext (statustext); After processing sent back Socketsend ("From server:" +recvstr);} Widget::~widget () {Delete UI;} Send Unity object left-handed message void widget::on_leftbtn_clicked () {socketsend ("leftrotate");} Send Unity object Right-handed message void widget::on_rightbtn_clicked () {socketsend ("rightrotate");}

The main.cpp is not changed and is not posted.

Unity C # Client

Create a unity scene and drag into a cube

The Tcpsocket connection portion is encapsulated into a separate class Tcpclienthandler, and a script tcptest is attached to the scene, where the tcpclienthandler for the connection is instantiated.

TcpClientHandler.cs

Using unityengine;using system.collections;//using system.net;using system.net.sockets;using System.Text;using     System.threading;public class tcpclienthandler:monobehaviour{socket ServerSocket;//server-side socket IPAddress IP;//Host IP    IPEndPoint Ipend; 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 the IP and port of the server, the port corresponds to the server Ip=ipaddress.parse ("127.0.0.1"); To be local area network or Internet IP, here is native ipend=new IPEndPoint (ip,6666);        Server port number//open a thread to connect, must, otherwise the main thread card dies connectthread=new thread (new ThreadStart (socketreceive));    Connectthread.start ();        } void Socketconnet () {if (serversocket!=null) serversocket.close ();        Defines the socket type, which must be defined in the child thread Serversocket=new socket (ADDRESSFAMILY.INTERNETWORK,SOCKETTYPE.STREAM,PROTOCOLTYPE.TCP);Print ("Ready to connect");        Connection Serversocket.connect (ipend);        Outputs the string recvlen=serversocket.receive (RecvData) received for the initial connection;        Recvstr=encoding.ascii.getstring (Recvdata,0,recvlen);    Print (RECVSTR);        } public void Socketsend (string sendstr) {//empty send cache senddata=new byte[1024];        Data type conversion senddata=encoding.ascii.getbytes (SENDSTR);    Send Serversocket.send (Senddata,senddata.length,socketflags.none);        } void Socketreceive () {socketconnet ();            Continuously receives data from the server while (true) {recvdata=new byte[1024];            Recvlen=serversocket.receive (RecvData);                if (recvlen==0) {socketconnet ();            Continue            } recvstr=encoding.ascii.getstring (Recvdata,0,recvlen);        Print (RECVSTR);        }}//Returns the received string, public string Getrecvstr () {string returnstr;      Lock prevents string from being changed to lock (this)  {returnstr=recvstr;    } return RETURNSTR; } public void Socketquit () {//Close thread if (connectthread!=null) {Connectthread.interrup            T ();        Connectthread.abort ();        }//finally shut down the server if (serversocket!=null) serversocket.close ();    Print ("Diconnect"); }}

TcpTest.cs

Using Unityengine;using system.collections;public class tcptest:monobehaviour{string editstring= "Hello wolrd";//edit box    Word gameobject cube;    Tcpclienthandler tcpClient; Use the this for initialization void Start () {//Initialize network connection//tcpclient=new Tcpclienthandler ();//Because the class relay for TCP Monobehaviour so you can not use new, or remove the inheritance of Monobehaviour to use the new tcpclient=gameobject.addcomponent<tcpclienthandler> ()        ;        Tcpclient.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), Tcpclient.getrecvstr ()); if (GUI.    button (new Rect (10,50,60,20), "send")) Tcpclient.socketsend (editstring);            }//update is called once per frame void Update () {if (Tcpclient.getrecvstr ()!=null) { Switch (TCPCLIENT.GETRECVSTR ()) {case "leftrotate": Cube.transform.RotaTe (vector3.up,50*time.deltatime);                Break                    Case "Rightrotate": Cube.transform.Rotate (Vector3.down,50*time.deltatime);            Break    }}} void Onapplicationquit () {//exit close connection Tcpclient.socketquit (); }}

Test

The program realizes the service side and the client send and receive messages to each other, the service side button can control cube rotation inside the client.

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