static public SharpDX.X3DAudio.Listener ToListener(this Audio.AudioListener listener)
{
// Pulling out Vector properties for efficiency.
var pos = listener.Position;
var vel = listener.Velocity;
var forward = listener.Forward;
var up = listener.Up;
// From MSDN:
// X3DAudio uses a left-handed Cartesian coordinate system,
// with values on the x-axis increasing from left to right, on the y-axis from bottom to top,
// and on the z-axis from near to far.
// Azimuths are measured clockwise from a given reference direction.
//
// From MSDN:
// The XNA Framework uses a right-handed coordinate system,
// with the positive z-axis pointing toward the observer when the positive x-axis is pointing to the right,
// and the positive y-axis is pointing up.
//
// Programmer Notes:
// According to this description the z-axis (forward vector) is inverted between these two coordinate systems.
// Therefore, we need to negate the z component of any position/velocity values, and negate any forward vectors.
forward *= -1.0f;
pos.Z *= -1.0f;
vel.Z *= -1.0f;
return(new SharpDX.X3DAudio.Listener()
{
Position = Convert(pos),
Velocity = Convert(vel),
OrientFront = Convert(forward),
OrientTop = Convert(up),
});
}
/// <summary>
///
/// </summary>
/// <param name="gameTime"></param>
protected override void Update ( GameTime gameTime )
{
var ds = GetService<DebugStrings>();
var dr = GetService<DebugRender>();
var cam = GetService<Camera>();
dr.View = cam.GetViewMatrix( StereoEye.Mono );
dr.Projection = cam.GetProjectionMatrix( StereoEye.Mono );;
dr.DrawGrid(20);
dr.DrawRing( Vector3.Zero, 15, Color.Orange, 64 );
angle += 0.1f;
if (emitter!=null) {
emitter.DopplerScale = 1;
emitter.Position = GetPosition(angle);
emitter.Velocity = (GetPosition(angle) - GetPosition(angle-0.1f)) * (1/gameTime.ElapsedSec);
emitter.DistanceScale = 2;
//emitter.VolumeCurve = Enumerable.Range(0, 11).Select( i => new CurvePoint{ Distance = i, DspSetting = (float)Math.Pow((10-i)/10.0f,2) } ).ToArray();
dr.DrawPoint( GetPosition(angle), 0.5f, Color.Yellow );
dr.DrawRing( GetPosition(angle), 10, Color.Orange, 64 );
}
//AudioDevice.SetupListener( cam.GetCameraMatrix( stereoEye ).TranslationVector, cam.GetCameraMatrix( stereoEye ).Forward, cam.GetCameraMatrix( stereoEye ).Up, cam.FreeCameraVelocity );*/
listener = cam.Listener;
if (soundInstance!=null) {
soundInstance.Apply3D( listener, emitter );
}
base.Update(gameTime);
ds.Add( Color.Orange, "FPS {0}", gameTime.Fps );
ds.Add( "F1 - show developer console" );
ds.Add( "F2 - toggle vsync" );
ds.Add( "F5 - build content and reload textures" );
ds.Add( "F12 - make screenshot" );
ds.Add( "ESC - exit" );
ds.Add("");
ds.Add("B - break glass");
ds.Add("P - play 3D sound");
ds.Add("O - pause/unpause 3D sound");
ds.Add("I - stop");
ds.Add("U - immediate stop");
ds.Add(Color.Orange, "See Camera config for controls");
}
/// <summary>
///
/// </summary>
/// <param name="listeners"></param>
/// <param name="emitter"></param>
public void Apply3D(AudioListener[] listeners,AudioEmitter emitter)
{
foreach ( var l in listeners )
Apply3D(l, emitter);
}
/// <summary>
///
/// </summary>
/// <param name="listener"></param>
/// <param name="emitter"></param>
public void Apply3D(AudioListener listener, AudioEmitter emitter)
{
// If we have no voice then nothing to do.
if (_voice == null)
return;
// Convert from XNA Emitter to a SharpDX Emitter
var e = emitter.ToEmitter();
// Apply overall Doppler and distance scale :
e.DopplerScaler *= device.DopplerScale;
e.CurveDistanceScaler *= device.DistanceScale;
// Convert from XNA Listener to a SharpDX Listener
var l = listener.ToListener();
// Number of channels in the sound being played.
// Not actually sure if XNA supported 3D attenuation of sterio sounds, but X3DAudio does.
var srcChannelCount = 1;//_effect._format.Channels;
// Number of output channels.
var dstChannelCount = device.MasterVoice.VoiceDetails.InputChannelCount;
var flags = CalculateFlags.Matrix | CalculateFlags.Doppler /*| CalculateFlags.Reverb | CalculateFlags.LpfDirect*/;
// XNA supports distance attenuation and doppler.
var dspSettings = device.Device3D.Calculate(l, e, flags, srcChannelCount, dstChannelCount);
// Apply Volume settings (from distance attenuation) ...
_voice.SetOutputMatrix(device.MasterVoice, srcChannelCount, dstChannelCount, dspSettings.MatrixCoefficients, 0);
// USE: VoiceFlags.UseFilter !!!
// _voice.SetFilterParameters( ... );
// Apply Pitch settings (from doppler) ...
_voice.SetFrequencyRatio(dspSettings.DopplerFactor);
}
