適用於Windows 8的任何優秀的簡單DirectX示例（開發人員預覽版）？

Question

關於如何在DirecX中爲Windows 8開發人員預覽繪製一個簡單的三角形，有沒有什麼好的教程？遊戲示例太複雜，無法理解新DirectX版本的「基本」操作（這與DirectX 9完全不同）。

Answer 1

該示例的要點是Windows 8，而不是DirectX。您需要在使用Windows 8之前在之前學習DirectX11 。您正在嘗試閱讀兩種技術之間的互操作示例，這兩種技術都不是您理解的。 Windows 8 Dev Preview的重點不在於教DirectX。

Answer 2

想通了。見下面的代碼。只有不起作用的是紋理（它顯示爲白色而不是顯示圖像，但至少顯示三角形！）（這個代碼顯然不是整個程序，原來它涉及到很多複雜代碼只是繪製一個三角形這些天！）

using System; 
using System.Collections.Generic; 
using System.IO; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using ManagedDirectX; 
using Windows.Storage; 
using Windows.Storage.Streams; 
namespace TestProgram 
{ 
    public sealed class EntryPoint 
    { 
     public void NtfyExecutionAbrt() 
     { 
     } 

     public EntryPoint() 
     { 
      beginexecblock(); 
     } 
     void onrenderframe() 
     { 
      if(vertcount>0) { 
       maincontext.Draw(vertcount); 
      } 
     } 
     int vertcount = 0; 
     Shader defaultshader; 
     RenderContext maincontext; 
     async void beginexecblock() 
     { 
      if ((await Windows.Storage.ApplicationData.Current.RoamingFolder.GetFilesAsync()).Count == 0) 
      { 
       await ApplicationData.Current.RoamingFolder.CreateFileAsync("testfile.txt"); 
       ApplicationData.Current.SignalDataChanged(); 
       Windows.UI.Popups.MessageDialog tdlg = new Windows.UI.Popups.MessageDialog("Roaming file creation success", "Sync status"); 
       await tdlg.ShowAsync();  
      } 
      try 
      { 
       DateTime started = DateTime.Now; 
       RenderContext mtext = new RenderContext(); 
       maincontext = mtext; 
       StorageFolder folder = Windows.ApplicationModel.Package.Current.InstalledLocation; 
       StorageFile file = await folder.GetFileAsync("DXInteropLib\\VertexShader.cso"); 

       var stream = (await file.OpenAsync(FileAccessMode.Read)); 
       Windows.Storage.Streams.DataReader mreader = new Windows.Storage.Streams.DataReader(stream.GetInputStreamAt(0)); 
       byte[] dgram = new byte[file.Size]; 
       await mreader.LoadAsync((uint)dgram.Length); 
       mreader.ReadBytes(dgram); 
       file = await folder.GetFileAsync("DXInteropLib\\PixelShader.cso"); 

       stream = await file.OpenAsync(FileAccessMode.Read); 
       mreader = new Windows.Storage.Streams.DataReader(stream.GetInputStreamAt(0)); 
       byte[] mgram = new byte[file.Size]; 
       await mreader.LoadAsync((uint)file.Size); 
       mreader.ReadBytes(mgram); 
       try 
       { 
        defaultshader = mtext.CreateShader(dgram, mgram); 
        mtext.InitializeLayout(dgram); 
        defaultshader.Apply(); 
        mtext.OnRenderFrame += onrenderframe; 
       } 
       catch (Exception er) 
       { 
        Windows.UI.Popups.MessageDialog mdlg = new Windows.UI.Popups.MessageDialog(er.ToString(),"Fatal error"); 
        mdlg.ShowAsync().Start(); 
       } 
       IStorageFile[] files = (await folder.GetFilesAsync()).ToArray(); 
       bool founddata = false; 
       foreach (IStorageFile et in files) 
       { 
        if (et.FileName.Contains("rawimage.dat")) 
        { 
         stream = await et.OpenAsync(FileAccessMode.Read); 
         founddata = true; 
        } 
       } 
       int width; 
       int height; 
       byte[] rawdata; 
       if (!founddata) 
       { 
        file = await folder.GetFileAsync("TestProgram\\test.png"); 
        stream = await file.OpenAsync(FileAccessMode.Read); 
        var decoder = await Windows.Graphics.Imaging.BitmapDecoder.CreateAsync(stream); 
        var pixeldata = await decoder.GetPixelDataAsync(Windows.Graphics.Imaging.BitmapPixelFormat.Rgba8, Windows.Graphics.Imaging.BitmapAlphaMode.Straight, new Windows.Graphics.Imaging.BitmapTransform(), Windows.Graphics.Imaging.ExifOrientationMode.IgnoreExifOrientation, Windows.Graphics.Imaging.ColorManagementMode.DoNotColorManage); 
        width = (int)decoder.PixelWidth; 
        height = (int)decoder.PixelHeight; 

        rawdata = pixeldata.DetachPixelData(); 
        file = await folder.CreateFileAsync("rawimage.dat"); 
        stream = (await file.OpenAsync(FileAccessMode.ReadWrite)); 
        var realstream = stream.GetOutputStreamAt(0); 
        DataWriter mwriter = new DataWriter(realstream); 
        mwriter.WriteInt32(width); 
        mwriter.WriteInt32(height); 
        mwriter.WriteBytes(rawdata); 
        await mwriter.StoreAsync(); 
        await realstream.FlushAsync(); 
       } 
       else 
       { 
        DataReader treader = new DataReader(stream.GetInputStreamAt(0)); 
        await treader.LoadAsync((uint)stream.Size); 
        rawdata = new byte[stream.Size-(sizeof(int)*2)]; 
        width = treader.ReadInt32(); 
        height = treader.ReadInt32(); 
        treader.ReadBytes(rawdata); 
       } 
       Texture2D mtex = maincontext.createTexture2D(rawdata, width, height); 
       List<VertexPositionNormalTexture> triangle = new List<VertexPositionNormalTexture>(); 
       triangle.Add(new VertexPositionNormalTexture(new Vector3(-.5f,-.5f,0),new Vector3(1,1,1),new Vector2(0,0))); 
       triangle.Add(new VertexPositionNormalTexture(new Vector3(0,0.5f,0),new Vector3(1,1,1),new Vector2(1,0))); 
       triangle.Add(new VertexPositionNormalTexture(new Vector3(.5f,-0.5f,0),new Vector3(1,1,1),new Vector2(1,1))); 
       byte[] gpudata = VertexPositionNormalTexture.Serialize(triangle.ToArray()); 

       VertexBuffer mbuffer = maincontext.createVertexBuffer(gpudata,VertexPositionNormalTexture.Size); 
       mbuffer.Apply(VertexPositionNormalTexture.Size); 
       vertcount = 3; 
       Windows.UI.Popups.MessageDialog tdlg = new Windows.UI.Popups.MessageDialog("Unit tests successfully completed\nShader creation: Success\nTexture load: Success\nVertex buffer creation: Success\nTime:"+(DateTime.Now-started).ToString(), "Results"); 
       tdlg.ShowAsync().Start(); 
      } 
      catch (Exception er) 
      { 
       Windows.UI.Popups.MessageDialog tdlg = new Windows.UI.Popups.MessageDialog(er.ToString(), "Fatal error"); 
       tdlg.ShowAsync().Start(); 
      } 
     }  
    } 
}