Problem with Managed c# Rendering Meshes order

[leandra]

HI im new in directx

i have previosly made a game in directx c++ and wanted to try using managed c#

and i have a BIIIGGGG PROBLEMMMM and I cant see what it is .

my problem is that I have 2 meshes one in (0,0,1) coordinate and the other one in (0,0,-3) and my camara is in (0,0,5) and when i render them the last mesh that is the fardest(0,0,-3) i see it in front of the first mesh(0,0,1),

its like the device doesnt use the Zbuffer for ordering my meshes

and I have it enable: device.RenderState.Zbuffer = true;

I dont understand WHY is it rendering in the order the meshes are getting to the effect , the device is not ordering my meshes and I cant figure it out.

PLS HELP ME , what am I doing wrong?????

here is the code::::::::::

	public Device device;
	public ExtendedMaterial[] materials;
	public Material[] meshMaterials ;
	public Texture[] meshTextures ;
	public ExtendedMaterial[] materials2;
	public Material[] meshMaterials2 ;
	public Texture[] meshTextures2 ;
	Effect effect,effect2;
	Mesh m,m2;

	public Form1()
	{
		this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.Opaque, true);	
		InitializeComponent();
	}
	#region Windows Form Designer generated code
	/// <summary>
	/// Required method for Designer support - do not modify
	/// the contents of this method with the code editor.
	/// </summary>
	private void InitializeComponent()
	{
		this.components = new System.ComponentModel.Container();
		this.Size = new System.Drawing.Size(300,300);
		this.Text = "Form1";
	}
	#endregion

	/// <summary>
	/// The main entry point for the application.
	/// </summary>
	[sTAThread]
	static void Main() 
	{
		using (Form1 frm = new Form1())
		{
			frm.Show();
			frm.InitializeDevice();
			Application.Run(frm);
		}
	}
	public void InitializeDevice()
	{
		PresentParameters presentParams = new PresentParameters();
		presentParams.Windowed = true;
		presentParams.SwapEffect = SwapEffect.Discard;
		device = new Microsoft.DirectX.Direct3D.Device(0, Microsoft.DirectX.Direct3D.DeviceType.Hardware, this, CreateFlags.HardwareVertexProcessing, presentParams);
		effect = Effect.FromFile(device,"simple.fx",null, null, ShaderFlags.None,null);
		effect2 = Effect.FromFile(device,"simple.fx",null, null, ShaderFlags.None,null);	
		device.Transform.Projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, this.Width / this.Width, 0.250f, 100.0f);
		device.Transform.View = Matrix.LookAtLH(new Vector3(0,0,5f), new Vector3(), new Vector3(0,1,0));
		device.Transform.World = Matrix.Identity;	
		device.RenderState.ZBufferEnable = true;
		crearMeshes();
		crearMeshes2();
	}	
	public void crearMeshes()
	{
	    m = Mesh.FromFile("asteroid1.x",MeshFlags.Managed,device,out materials);
		meshMaterials = new Material[materials.Length];
		meshTextures  = new Texture[materials.Length];
		for( int i=0; i< materials.Length; i++ )
		{
			meshMaterials[i] = materials[i].Material3D;
			if ((materials[i].TextureFilename != null) && ((materials[i].TextureFilename != string.Empty)))
			{
				meshTextures[i] = TextureLoader.FromFile(device, materials[i].TextureFilename);
			}
		}
	}
	public void crearMeshes2()
	{
		m2 = Mesh.FromFile("sphere.x",MeshFlags.Managed,device,out materials2);
		meshMaterials2 = new Material[materials2.Length];
		meshTextures2  = new Texture[materials2.Length];
		for( int i=0; i< materials2.Length; i++ )
		{
			meshMaterials2[i] = materials2[i].Material3D;
			if ((materials2[i].TextureFilename != null) && ((materials2[i].TextureFilename != string.Empty)))
			{
				meshTextures2[i] = TextureLoader.FromFile(device, materials2[i].TextureFilename);
			}
		}
	}
	protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
	{
		device.Clear(ClearFlags.Target, System.Drawing.Color.White, 1.0f, 0);
		device.BeginScene();
		effect.SetValue("g_mWorldViewProjection", device.Transform.World  * Matrix.Translation(0,0f,3f) * device.Transform.View  * device.Transform.Projection );		
		effect.SetValue("g_mWorld", Matrix.Identity);
		effect.Technique = "RenderScene";		
		int numPass = effect.Begin(0);
		for (int pass=0; pass<numPass; pass++)
		{
			effect.BeginPass(pass);
			for (int i = 0; i < materials.Length; i++)
			{
				device.Material = meshMaterials[i];
				device.SetTexture(pass,meshTextures[i]);
				m.DrawSubset(i);
			}
				effect.EndPass();
		}
		effect.End();		
		//effect2.SetValue("g_mWorldViewProjection", device.Transform.World  * device.Transform.View * device.Transform.Projection );
		effect2.SetValue("g_mWorldViewProjection", device.Transform.World * Matrix.Translation(0,0f,-3f) * device.Transform.View * device.Transform.Projection );		
		effect2.SetValue("g_mWorld", device.Transform.World);
		effect2.Technique = "RenderScene";
		numPass = effect2.Begin(0);
		for (int pass=0; pass<numPass; pass++)
		{
			effect2.BeginPass(pass);
			for (int i = 0; i < materials2.Length; i++)
			{
				device.Material = meshMaterials2[i];
				device.SetTexture(pass,meshTextures2[i]);
				m2.DrawSubset(i);
			}
			effect2.EndPass();
		}
		effect2.End();		
		device.EndScene();
		device.Present();
		this.Invalidate();
	}

Edited June 21, 2005 by PlausiblyDamp

[IngisKahn]

Just a quick scan of your code -- I see that you're not clearing the ZBuffer.

device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, System.Drawing.Color.White, 1.0f, 0);

[mutant]

You are not enabling the depth buffer in presentation parameters. Look into EnableAutoDepthStencil and AutoDepthStencilFormat properties of present params.