把Unity3D嵌入winform或者wpf程序，過去大部分使用UnityWebPlayer插件來實現，這個插件其實就是網頁上播放unity頁遊的插件。
但是使用UnityWebPlayer嵌入桌面開發有各種問題，我認爲最大的問題是效率問題（加載緩慢），畢竟是網頁的加載方式，而且可以確認未來也不會得到任何優化。
由於WebGL的高速發展，unity公司認識到了webplayer十分雞肋，畢竟WebGL不需要任何插件可以直接顯示3d內容了，所以Unity3D在5.4.x版本以後明確表示,不再支持webplayer了，所以桌面上UnityWebPlayer插件能不用也就別用了吧。
將Unity嵌入桌面程序最好的方式是嵌入unity生成的exe程序，winform程序和unity之間通過socket進行通訊，我認爲
這也是效率最高，效果最好和最好實現的方式。在Unity程序腳本中，嵌入socket內容，我推薦做成客戶端（client），使用wpf程序做服務器端,這是一個誰是主體的問題。
這樣wpf可以加載多個unity程序。
嵌入後的結果如下圖所示（請無視具體內容）：
下面簡單寫了一個腳本，其中man是遊戲中的一個gameobject對象。
就是上圖中穿藍衣服的男人。在他身上掛着socket腳本如下
using UnityEngine; using System.Collections; using System.Net.Sockets; using System; public class demoshows : MonoBehaviour { public GameObject man; const int portNo = 500; private TcpClient _client; byte[] data; string Error_Message; void Start () { try { this._client = new TcpClient(); this._client.Connect("127.0.0.1", portNo); data = new byte[this._client.ReceiveBufferSize]; //SendMessage(txtNick.Text); SendMessage("Unity Demo Client is Ready!"); this._client.GetStream().BeginRead(data, 0, System.Convert.ToInt32(this._client.ReceiveBufferSize), ReceiveMessage, null); } catch (Exception ex) { } } void Update () { transform.Rotate(new Vector3(0, 1, 0),0.1f); } public void rotation() { transform.Rotate(new Vector3(0, 10, 0)); //targetRotation = Quaternion.Euler(45.0f, 45.0f, 45.0f); //// 直接設置旋轉角度 //transform.rotation = targetRotation; ////man.transform.rotation.SetAxisAngle(new Vector3(0, 1, 0), 30);; } public void translateX(float x) { transform.Translate(new Vector3(x,0,0)); } public void translateY(float y) { transform.Translate(new Vector3(0, y, 0)); } public void translateZ(float z) { transform.Translate(new Vector3(0, 0, z)); } void OnGUI() { GUI.Label(new Rect(50, 50, 150,50 ), Error_Message); } public new void SendMessage(string message) { try { NetworkStream ns = this._client.GetStream(); byte[] data = System.Text.Encoding.ASCII.GetBytes(message); ns.Write(data, 0, data.Length); ns.Flush(); } catch (Exception ex) { Error_Message = ex.Message; //MessageBox.Show(ex.ToString()); } } public void ReceiveMessage(IAsyncResult ar) { try { //清空errormessage Error_Message = ""; int bytesRead; bytesRead = this._client.GetStream().EndRead(ar); if (bytesRead < 1) { return; } else { Debug.Log(System.Text.Encoding.ASCII.GetString(data, 0, bytesRead)); string message = System.Text.Encoding.ASCII.GetString(data, 0, bytesRead); switch (message) { case "1": translateX(1); break; case "2": translateX(-1); break; case "3": translateY(1); break; case "4": translateY(-1); break; case "5": translateZ(1); break; case "6": translateZ(-1); break; default: Error_Message = "unknown command"; break; } } this._client.GetStream().BeginRead(data, 0, System.Convert.ToInt32(this._client.ReceiveBufferSize), ReceiveMessage, null); } catch (Exception ex) { Error_Message = ex.Message; } } void OnDestroy() { this._client.Close(); } }腳本很簡單，就是通過向unity程序發送消息（1~6）實現模型的平移。
服務器端，在wpf程序中簡單建立一個socket類，ip和端口要和unity對應，在程序啓動時先建立服務器端。
使用socket一定要注意使用線程，並且退出時及時結束
下面大概就是server的啓動和釋放，效果還好，至少不卡死
TcpServer WpfServer; int size_state = 0; public MainWindow() { InitializeComponent(); this.Closed += MainWindow_Closed; this.Activated += MainWindow_Activated; this.Deactivated += MainWindow_Deactivated; WpfServer = new TcpServer(); WpfServer.StartServer(); } void MainWindow_Closed(object sender, EventArgs e) { unityhost.Form1_FormClosed(); WpfServer.QuitServer(); }
如何嵌入？
首先在wpf程序中建立一個winform的自定義控件（不是wpf控件）usercontrol
在usercontrol內新建一個panel（或者其他帶有句柄的控件），並設置dock屬性爲fill。
啓動unity.exe，通過幾個api將unity窗口附加在panel句柄上。
（說明：借鑑別人的程序）
需要把unity程序命名爲child.exe，放在下面指定位置（Debug\UnityApp\Child.exe,或者release）
process.StartInfo.FileName =Application.StartupPath +@"\UnityApp\Child.exe";
詳細代碼如下：
using System; using System.Windows.Forms; using System.Runtime.InteropServices; using System.Diagnostics; using System.Threading; namespace Demo_Song { public partial class UnityControl : UserControl { [DllImport("User32.dll")] static extern bool MoveWindow(IntPtr handle, int x, int y, int width, int height, bool redraw); internal delegate int WindowEnumProc(IntPtr hwnd, IntPtr lparam); [DllImport("user32.dll")] internal static extern bool EnumChildWindows(IntPtr hwnd, WindowEnumProc func, IntPtr lParam); [DllImport("user32.dll")] static extern int SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam); private Process process; private IntPtr unityHWND = IntPtr.Zero; private const int WM_ACTIVATE = 0x0006; private readonly IntPtr WA_ACTIVE = new IntPtr(1); private readonly IntPtr WA_INACTIVE = new IntPtr(0); public UnityControl() { InitializeComponent(); this.Load += UnityControl_Load; panel1.Resize+=panel1_Resize; } private void UnityControl_Load(object sender, EventArgs e) { try { process = new Process(); process.StartInfo.FileName =Application.StartupPath +@"\UnityApp\Child.exe"; process.StartInfo.Arguments = "-parentHWND " + panel1.Handle.ToInt32() + " " + Environment.CommandLine; process.StartInfo.UseShellExecute = true; process.StartInfo.CreateNoWindow = true; process.Start(); process.WaitForInputIdle(); // Doesn't work for some reason ?! //unityHWND = process.MainWindowHandle; EnumChildWindows(panel1.Handle, WindowEnum, IntPtr.Zero); unityHWNDLabel.Text = "Unity HWND: 0x" + unityHWND.ToString("X8"); } catch (Exception ex) { unityHWNDLabel.Text = ex.Message; //MessageBox.Show(ex.Message); } } internal void ActivateUnityWindow() { SendMessage(unityHWND, WM_ACTIVATE, WA_ACTIVE, IntPtr.Zero); } internal void DeactivateUnityWindow() { SendMessage(unityHWND, WM_ACTIVATE, WA_INACTIVE, IntPtr.Zero); } private int WindowEnum(IntPtr hwnd, IntPtr lparam) { unityHWND = hwnd; ActivateUnityWindow(); return 0; } private void panel1_Resize(object sender, EventArgs e) { MoveWindow(unityHWND, 0, 0, panel1.Width, panel1.Height, true); ActivateUnityWindow(); } // Close Unity application internal void Form1_FormClosed() { try { process.CloseMainWindow(); Thread.Sleep(1000); while (process.HasExited == false) process.Kill(); } catch (Exception) { } } internal void Form1_Activated() { ActivateUnityWindow(); } internal void Form1_Deactivate() { DeactivateUnityWindow(); } } }
