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Unity: UDPを送る

Last updated at Posted at 2016-05-18

UDP Event -> BrightSign

動画プレイヤーとしてそれなりに有名だと思われるBrightSign
BrightAuthorを使って動画再生のプログラムを作ることもできる。あるイベントによって、動画再生を開始したり、違う動画を再生するといったものだ。イベントタイプの一つにUDPが用意されている。展示用に画像のようなシステムをつくった。
canon_wireless.png

UnityでUDP送信するiOSアプリの通信部分を以下で簡単に説明。

UDP Sender

UnityでUDPを受けるのは確か大変だった気がするが、送るのは簡単。このフォーラムの投稿のコードをほぼそのまま使うとできる。UDPを送るメソッドにはmodifier publicを付与すればinspector上でOnClickイベントで実行設定できる。

using UnityEngine;
using System.Collections;
using System;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;

public class UDPSender : MonoBehaviour {
	// UDP sender based on the code from the following url..http://forum.unity3d.com/threads/sending-data-using-udp.316834/
	public string IP = "255.255.255.255"; // default is local
	public int port = 5000;
	IPEndPoint remoteEndPoint;
	UdpClient client;

	// variables for timer
	public bool isTimerOn = false;
	float timerCounter = 180.0f;
	// Use this for initialization
	void Start () {

	}
	
	// Update is called once per frame
	void Update () {

	}

	public void GoBack() {
		IP = "255.255.255.255";
		port = 5000; // port number
		remoteEndPoint = new IPEndPoint (IPAddress.Parse (IP), port);

		client = new UdpClient ();
		byte[] data = Encoding.UTF8.GetBytes("Back"); // string message must be matched with the label name of the bright sign project.
		client.Send (data, data.Length, remoteEndPoint);
	}

	public void Projection(string targetScene) {
		IP = "255.255.255.255";
		port = 5000;
		remoteEndPoint = new IPEndPoint (IPAddress.Parse (IP), port);
		client = new UdpClient ();
		byte[] data = Encoding.UTF8.GetBytes (targetScene);
		client.Send (data, data.Length, remoteEndPoint);

	}
}
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