managed directx實現讀寫buffer (Read and Write VertexBuffer and IndexBuffer Data)

Read and Write VertexBuffer and IndexBuffer Data With GraphicsStreams

using System;

using Microsoft.DirectX;

using Microsoft.DirectX.Direct3D;

public struct PositionNormalTexVertex

{

public Vector3 Position;

public Vector3 Normal;

public float Tu0, Tv0;

public static readonly VertexFormats FVF = VertexFormats.Position | VertexFormats.Texture1;

}

public class Example

{

public unsafe void GraphicsStreamReadWrite()

{

// Create a vertex buffer in the managed pool

VertexBuffer vb = new VertexBuffer( typeof (PositionNormalTexVertex), 100 , device, Usage.None, PositionNormalTexVertex.FVF, Pool.Managed);

// First, fill an array of PositionNormalTexVertex elements with data.

PositionNormalTexVertex[] vertices = new PositionNormalTexVertex[ 50 ];

for ( int i = 0 ; i < 50 ; i ++ )

{

// fill the vertices with some data

vertices[i].Position = new Vector3(3f,4f,5f);

}

// The size of the verticies are 32-bytes each (float3 (12) + float3 (12) + float(4) + float(4))

// To lock 50 verticies, the size of the lock would be 1600 (32 * 50)

GraphicsStream vbData = vb.Lock( 0 , 1600 , LockFlags.None);

// copy the vertex data into the vertex buffer

vbData.Write(vertices);

// Unlock the VB

vb.Unlock();

// This time, lock the entire VertexBuffer

vbData = vb.Lock( 0 , 3200 , LockFlags.None);

// Cast the InternalDataPointer (a void pointer) to an array of verticies

PositionNormalTexVertex * vbArray = (PositionNormalTexVertex * ) vbData.InternalDataPointer;

for ( int i = 0 ; i < 100 ; i ++ )

{

// perform some operations on the data

vbArray[i].Tu0 = i;

vbArray[i].Tv0 = vbArray[i].Tu0 * 2 ;

Console.WriteLine(vbArray[i].Tv0.ToString());

}

// Unlock the buffer

vb.Unlock();

vb.Dispose();

}

Read and Write VertexBuffer Data With Arrays

using System;

using Microsoft.DirectX;

using Microsoft.DirectX.Direct3D;

public struct PositionNormalTexVertex

{

public Vector3 Position;

public Vector3 Normal;

public float Tu0, Tv0;

public static readonly VertexFormats FVF = VertexFormats.Position | VertexFormats.Texture1;

}

public class Example

{

public void ArrayBasedReadWrite()

{

//Create a vertex buffer in the managed pool

VertexBuffer vb = new VertexBuffer(typeof(PositionNormalTexVertex), 100, device, Usage.None, PositionNormalTex1Vertex.FVF, Pool.Managed);

//Fill an array of the appropriate type with the VB data using Lock()

PositionNormalTexVertex[] vbData = (PositionNormalTexVertex[]) vb.Lock(0, typeof(PositionNormalTexVertex), LockFlags.None, 50);

for(int i=0; i<50; i++)

{

//set your vertices to something

vbData[i].Position = new Vector3(2f,2f,2f);

vbData[i].Normal = new Vector3(1f,0f,0f);

vbData[i].Tu0 = i;

vbData[i].Tv0 = i;

}

//Unlock the vb before you can use it elsewhere

vb.Unlock();

//This lock overload simply locks the entire VB -- setting ReadOnly //can improve perf when reading a vertexbuffer

vbData = (PositionNormalTexVertex[]) vb.Lock(0, LockFlags.ReadOnly);

for(int i=0; i<100; i++)

{

//read some vertex data

Console.WriteLine("Vertex " + i + "Tu: " + vbData[i].Tu0 + " , Tv: " + vbData[i].Tv0);

}

//Unlock the buffer

vb.Unlock();

vb.Dispose();

}

posted on 2006-06-09 16:39 夢在天涯閱讀(1395) 評論(1) 編輯收藏引用所屬分類: DirectX

只有注冊用戶登錄后才能發表評論。
【推薦】100%開源！大型工業跨平臺軟件C++源碼提供，建模，組態！

相關文章: 紋理+VertexElement（二） Manged Direct3d基本框架+Mesh的使用（一）為程序增加簡單的聲音提示(.net封裝API --PlaySound()) Managed directx 檢查硬件支持和實現全屏顯示 managed directx 實現太陽系的模擬投影變換三維幾何變換二維圖形的幾何變換窗口區到視圖區的坐標變換 managed directx實現讀寫buffer (Read and Write VertexBuffer and IndexBuffer Data)

網站導航: 博客園 IT新聞 BlogJava 博問 Chat2DB 管理

# re: managed directx實現讀寫buffer (Read and Write VertexBuffer and IndexBuffer Data)[未登錄] 2007-11-09 15:34 夢在天涯

C++ Programmer's Cookbook

managed directx實現讀寫buffer (Read and Write VertexBuffer and IndexBuffer Data)

Read and Write VertexBuffer and IndexBuffer Data With GraphicsStreams

Read and Write VertexBuffer Data With Arrays

評論

公告

導航

統計

常用鏈接

隨筆分類

隨筆檔案

收藏夾

Blogs

c#(csharp)

C++(cpp)

Enlish

Forums(bbs)

My self

Often go

Useful Webs

Xml/Uml/html

搜索

積分與排名

最新評論

閱讀排行榜