www.pudn.com > IntroductionTo3DGameEngineDesign.rar > Listener.cs

using System; 
using System.Drawing; 
using Microsoft.DirectX; 
using Microsoft.DirectX.DirectSound; 
using Sound = Microsoft.DirectX.DirectSound; 
using Buffer = Microsoft.DirectX.DirectSound.Buffer; 
 
namespace GameEngine 
{ 
	/// 
 
	/// Summary description for Listener. 
	/// 
 
	public class Listener : IDisposable 
	{ 
 
		#region Attributes 
		private Sound.Listener3DSettings listenerParameters = new Sound.Listener3DSettings(); 
		private Sound.Listener3D applicationListener = null; 
		private Object3D m_listener = null; 
 
		private static Sound.Device applicationDevice = new Sound.Device(); 
		#endregion 
 
		#region Properties 
		public static Sound.Device Device { get { return applicationDevice; } } 
		#endregion 
 
		public Listener(System.Windows.Forms.Form form, Object3D object_listening) 
		{ 
			m_listener = object_listening; 
			Sound.BufferDescription description = new Sound.BufferDescription(); 
			Sound.WaveFormat fmt = new Sound.WaveFormat(); 
			description.PrimaryBuffer = true; 
			description.Control3D = true; 
			Sound.Buffer buff	= null; 
		 
			fmt.FormatTag = Sound.WaveFormatTag.Pcm; 
			fmt.Channels = 2; 
			fmt.SamplesPerSecond = 22050; 
			fmt.BitsPerSample = 16; 
			fmt.BlockAlign = (short)(fmt.BitsPerSample / 8 * fmt.Channels); 
			fmt.AverageBytesPerSecond = fmt.SamplesPerSecond * fmt.BlockAlign; 
 
			applicationDevice.SetCooperativeLevel( form, Sound.CooperativeLevel.Priority); 
		 
			// Get the primary buffer and set the format. 
			buff = new Buffer(description, Device); 
			buff.Format = fmt; 
 
			applicationListener = new Listener3D(buff); 
			listenerParameters = applicationListener.AllParameters; 
		} 
 
		public void Update() 
		{ 
			if ( m_listener != null ) 
			{ 
				listenerParameters.Position = m_listener.Position; 
				 
				Vector3 front = new Vector3( 0.0f, 0.0f, 1.0f ); 
				Vector3 top   = new Vector3( 0.0f, 1.0f, 0.0f ); 
 
				Matrix transform = Matrix.RotationYawPitchRoll( 
					m_listener.Attitude.Heading, 
					m_listener.Attitude.Pitch,  
					m_listener.Attitude.Roll); 
 
				listenerParameters.OrientFront =  
					Vector3.TransformCoordinate( front, transform ); 
				listenerParameters.OrientTop   =  
					Vector3.TransformCoordinate( top, transform ); 
			} 
			applicationListener.CommitDeferredSettings(); 
 
		} 
 
		public void Dispose() 
		{ 
			applicationListener.Dispose(); 
			applicationDevice.Dispose(); 
		} 
	} 
}