drawsubset exception

[mmmobasher]

I work on a little project that load's mesh data from a

custom txt file

this code give me the access violation exception

in Mesh.drawsubset(0) line.

I am using directx 9.0c april 2005 and vs2005.

any ideas?

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using Microsoft.DirectX;

using Microsoft.DirectX.Direct3D;

 

using System.IO;

namespace MeshDemo

{

public partial class Meshes : Form

{

private float xRotate = 0;

private float yRotate = 0;

private float zRotate = 0;

private float h = 0;

private Device device = null;

//private VertexBuffer vertexBuffer = null;

private Mesh MyMesh = null;

private int NumberOfVertices;

private int NumberofIndices;

PresentParameters presentParams;

public Int64 iter=0;

Material mtrl;

public Meshes()

{

InitializeComponent();

}

 

static void Main()

{

 

using (Meshes frm = new Meshes())

{

if (!frm.InitializeGraphics()) {

MessageBox.Show("Could not initialize

 

Direct3D. This tutorial will exit.");

return;

}

frm.Show();

 

 

 

and process messages

while (frm.Created)

{

frm.Render();

Application.DoEvents();

}

}

}

 

public bool InitializeGraphics()

{

try

{

InitDevice();

SetupDevice();

 

device.DeviceReset += new

 

EventHandler(OnDeviceReset);

OnDeviceReset(null, EventArgs.Empty);

 

 

 

 

return true;

}

catch (DirectXException)

{

return false;

}

 

}

 

 

 

private void OnDeviceReset(object sender,

 

EventArgs e)

{

InitDevice();

}

private void SetupDevice()

{

device.RenderState.Lighting = true;

device.RenderState.Ambient =

 

System.Drawing.Color.Yellow;

device.RenderState.ZBufferEnable = true;

 

 

ColorSource.Material;

mtrl = new Material();

Color c = Color.FromArgb(127, 255, 0, 0);

 

mtrl.Diffuse = c;

mtrl.Ambient = c;

mtrl.Specular = c;

mtrl.Emissive = c;

 

device.Material = mtrl;

}

private void InitDevice()

{

 

presentParams = new PresentParameters();

presentParams.Windowed = true;

presentParams.SwapEffect =

 

SwapEffect.Discard;

presentParams.DeviceWindow =

 

this.pictureBox2;

presentParams.AutoDepthStencilFormat =

 

DepthFormat.D16;

presentParams.EnableAutoDepthStencil = true;

device = new Device(0, DeviceType.Hardware,

 

this, CreateFlags.SoftwareVertexProcessing,

 

presentParams);

}

protected override void

 

OnKeyPress(System.Windows.Forms.KeyPressEventArgs e)

{

if ((int)(byte)e.KeyChar ==

 

(int)System.Windows.Forms.Keys.Escape)

this.Close(); // Esc was pressed

 

}

protected override void

 

OnKeyDown(System.Windows.Forms.KeyEventArgs e)

 

{

if ((int)(byte)e.KeyCode ==

 

(int)System.Windows.Forms.Keys.Up)

xRotate += 0.1F;

if ((int)(byte)e.KeyCode ==

 

(int)System.Windows.Forms.Keys.Down)

xRotate -= 0.1f;

if ((int)(byte)e.KeyCode ==

 

(int)System.Windows.Forms.Keys.Right)

yRotate += 0.1f;

if ((int)(byte)e.KeyCode ==

 

(int)System.Windows.Forms.Keys.Left)

yRotate -= 0.1f;

if ((int)(byte)e.KeyCode ==

 

(int)System.Windows.Forms.Keys.W)

zRotate += 0.1f;

if ((int)(byte)e.KeyCode ==

 

(int)System.Windows.Forms.Keys.S)

zRotate -= 0.1f;

if ((int)(byte)e.KeyCode ==

 

(int)System.Windows.Forms.Keys.NumPad8)

h += 1;

if ((int)(byte)e.KeyCode ==

 

(int)System.Windows.Forms.Keys.NumPad2)

h -= 1;

 

}

 

//protected override void

 

OnPaint(System.Windows.Forms.PaintEventArgs e)

//{

// //Application.DoEvents();

// //this.Render(); // Render

// //Application.DoEvents();

//}

 

 

private void Render()

{

 

if (device == null)

return;

 

//Clear the backbuffer to a blue color (ARGB

 

= 000000ff)

device.Clear(ClearFlags.Target,

 

System.Drawing.Color.WhiteSmoke, 1.0f, 0);

//Begin the scene

 

device.BeginScene();

 

Calculate();

 

 

MyMesh.VertexBuffer, 0);

device.VertexFormat =

 

CustomVertex.PositionColored.Format;

 

iter += 1;

SetupMatrices();

 

MyMesh.DrawSubset(0);

 

device.EndScene();

device.Present();

}

 

private void SetupMatrices()

{

 

 

device.Transform.World =Matrix.RotationX(xRotate);

 

 

 

device.Transform.View = Matrix.LookAtLH(

new Vector3(0.0f, 3.0f, -5.0f),

new Vector3(0.0f, 0.0f, 0.0f),

new Vector3(0.0f, 1.0f, 0.0f));

device.Transform.Projection =

 

Matrix.PerspectiveFovLH(

(float)Math.PI / 4,

1.0f,

0.4f,

10000.0f);

}

 

 

private void Calculate()

{

 

 

try

{

String line;

 

int color,index1;

float x, y, z;

 

#region vertices creation

 

using (StreamReader sr = new

 

StreamReader(@"Mesh.txt"))

{

if (MyMesh != null)

{

MyMesh.Dispose();

MyMesh = null;

}

NumberOfVertices =

 

int.Parse(sr.ReadLine());

 

MyMesh =new Mesh(NumberOfVertices/3,

 

NumberOfVertices,

 

 

MeshFlags.VbManaged|MeshFlags.IbManaged,

 

CustomVertex.PositionColored.Format, device);

//

CustomVertex.PositionColored[]

 

arrayVertices =

new

 

CustomVertex.PositionColored[NumberOfVertices];

 

for (int arrayIndex = 0; arrayIndex <

 

NumberOfVertices; arrayIndex++)

{

line = sr.ReadLine();

x = float.Parse(line);

line = sr.ReadLine();

y = float.Parse(line);

line = sr.ReadLine();

z = float.Parse(line);

line = sr.ReadLine();

color = int.Parse(line);

 

CustomVertex.PositionColored

 

vertex = new CustomVertex.PositionColored(x, y, z,

 

color);

 

arrayVertices[arrayIndex] =

 

vertex;

 

}

 

 

line = sr.ReadLine();

NumberofIndices=int.Parse(line);

int[] arrayIndices = new

 

int[NumberofIndices];

for (int arrayIndex = 0; arrayIndex <

 

NumberofIndices; arrayIndex++)

{

line = sr.ReadLine();

index1 = int.Parse(line);

 

arrayIndices[arrayIndex] =

 

index1;

 

}

AttributeRange attributeRange = new

 

AttributeRange();

// There is only one attribute value

 

for this mesh.

// By specifying an attribute range

 

the DrawSubset function

// does not have to scan the entire

 

mesh for all faces that are

// are marked with a particular

 

attribute id.

attributeRange.AttributeId = 0;

attributeRange.FaceStart = 0;

attributeRange.FaceCount =

 

arrayIndices.Length / 3;

attributeRange.VertexStart = 0;

attributeRange.VertexCount =

 

arrayVertices.Length;

 

 

MyMesh.VertexBuffer.SetData(arrayVertices, 0,

 

LockFlags.None);

 

 

MyMesh.IndexBuffer.SetData(arrayIndices, 0,

 

LockFlags.None);

 

 

//MyMesh.LockAttributeBuffer(LockFlags.None);

MyMesh.SetAttributeTable(new

 

AttributeRange[] { attributeRange });

//MyMesh.UnlockAttributeBuffer();

 

}

#endregion

 

}

catch (Direct3DXException e)

{

MessageBox.Show("Error in vertex

 

creatioin:{0}", e.ToString());

}

}

 

}

}