Using index buffers

Using index buffers

• mikeBearb

  I write my program exactly as Andypike. But it doesn't works. Why
  
  

• Ti L H

  Andypike has exactly the kind of sample you are looking for. Although in DirectX8 and in C++. The explanation is good and should give you a bump in the right direction.
  
  I hope this helps.
  Take care.
  
  
  

• flyernut

  I wrote following program:

  using System;

  using System.Windows.Forms;

  using System.Drawing;

  using Microsoft.DirectX;

  using Microsoft.DirectX.Direct3D;

  namespace ProgaX

  {

  class Forma : Form

  {

  #region Variables

  Device device = null;

  VertexBuffer buf = null;

  IndexBuffer ibuf = null;

  PresentParameters par = new PresentParameters();

  #endregion

  void init()

  {

  par.Windowed = true;

  par.SwapEffect = SwapEffect.Discard;

  device = new Device(0, DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, par);

  Size = new Size(300, 300);

  buf = new VertexBuffer(typeof(CustomVertex.PositionOnly), 3, device, 0, CustomVertex.PositionOnly.Format, Pool.Default);

  buf.Created += new EventHandler(OnCreateVertex);

  ibuf = new IndexBuffer(typeof(int), 3, device, 0, Pool.Default);

  ibuf.Created += new EventHandler(OnCreateIndex);

  device.DeviceReset += new EventHandler(OnResetDevice);

  OnResetDevice(device, null);

  OnCreateVertex(buf, null);

  OnCreateIndex(ibuf, null);

  }

  void OnResetDevice(object d, EventArgs e)

  {

  Device dev = (Device)d;

  dev.RenderState.CullMode = Cull.None;

  dev.RenderState.Lighting = false;

  }

  void OnCreateVertex(Object sender, EventArgs e)

  {

  VertexBuffer vb = (VertexBuffer)sender;

  CustomVertex.PositionOnly[] v = (CustomVertex.PositionOnly[])vb.Lock(0, 0); ;

  v[0].Position = new Vector3(1, 1, 1);

  v[1].Position = new Vector3(-1, -1, -1);

  v[2].Position = new Vector3(1, -1, 1);

  vb.Unlock();

  }

  void OnCreateIndex(Object sender, EventArgs e)

  {

  IndexBuffer ib = (IndexBuffer)sender;

  int[] i = (int[])ib.Lock(0, 0);

  i[0] = 0;

  i[1] = 1;

  i[2] = 2;

  ib.Unlock();

  }

  void Render()

  {

  if (device == null) return;

  device.Clear(ClearFlags.Target, Color.Black, 1, 0);

  device.BeginScene();

  device.Transform.World = Matrix.RotationY(Environment.TickCount * (2.0f * (float)Math.PI) / 5000.0f);

  device.Transform.View = Matrix.LookAtLH(new Vector3(0, 3f, -5f), new Vector3(0, 0, 0), new Vector3(0, 1, 0));

  device.Transform.Projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, 1, 1, 100);

  device.SetStreamSource(0, buf, 0);

  device.VertexFormat = CustomVertex.PositionOnly.Format;

  device.Indices = ibuf;

  device.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, 0, 3, 0, 1);

  device.EndScene();

  device.Present();

  }

  static void Main()

  {

  Forma Form1 = new Forma();

  Form1.init();

  Form1.Show();

  while (Form1.Created)

  {

  Form1.Render();

  Application.DoEvents();

  }

  }

  }

  }

  But it doesn't work. When I run it, computer suddenly reboots (like when I press reset). Where is a mistake

  
  
  

• mame

  I understand. I used 32-bit indicies (int), but my video card doesn't support them. With 16-bit indicies my program works correctly. Thanks!
  
  

• Vikram Kumar

  Yes, I can run all the tutorials, but they don't use index buffers.
  
  

• Mr Leaf

  Tough to know - do all the programs crash your computer

  Can you run any of the tutorial 1-6 in the SDK How about other SDK samples

  
  
  

• swYap

  Sorry, I thought one of them used it.

  Try Chads tutorial here http://www.c-unit.com/tutorials/mdirectx/ t=33

  
  
  

• Darren Blackett

  I also copied program from http://users.pandora.be/riemer/indices.html it doesn't work too. I think it is because my video card may not support this feature (I have VIA/S3G UniChromeII Graphics video card). If you know something about it, please, tell me.

  
  
  
• Using index buffers