Nerfed/Nerfed.Runtime/Audio/AudioListener.cs

using System;
using System.Numerics;

namespace Nerfed.Runtime.Audio;

/// <summary>
/// A listener for 3D spatial audio. Usually attached to a camera.
/// </summary>
public class AudioListener : AudioResource
{
	internal FAudio.F3DAUDIO_LISTENER listenerData;

	public Vector3 Forward
	{
		get
		{
			return new Vector3(
				listenerData.OrientFront.x,
				listenerData.OrientFront.y,
				-listenerData.OrientFront.z
			);
		}
		set
		{
			listenerData.OrientFront.x = value.X;
			listenerData.OrientFront.y = value.Y;
			listenerData.OrientFront.z = -value.Z;
		}
	}

	public Vector3 Position
	{
		get
		{
			return new Vector3(
				listenerData.Position.x,
				listenerData.Position.y,
				-listenerData.Position.z
			);
		}
		set
		{
			listenerData.Position.x = value.X;
			listenerData.Position.y = value.Y;
			listenerData.Position.z = -value.Z;
		}
	}


	public Vector3 Up
	{
		get
		{
			return new Vector3(
				listenerData.OrientTop.x,
				listenerData.OrientTop.y,
				-listenerData.OrientTop.z
			);
		}
		set
		{
			listenerData.OrientTop.x = value.X;
			listenerData.OrientTop.y = value.Y;
			listenerData.OrientTop.z = -value.Z;
		}
	}

	public Vector3 Velocity
	{
		get
		{
			return new Vector3(
				listenerData.Velocity.x,
				listenerData.Velocity.y,
				-listenerData.Velocity.z
			);
		}
		set
		{
			listenerData.Velocity.x = value.X;
			listenerData.Velocity.y = value.Y;
			listenerData.Velocity.z = -value.Z;
		}
	}

	public AudioListener(AudioDevice device) : base(device)
	{
		listenerData = new FAudio.F3DAUDIO_LISTENER();
		Forward = Vector3.UnitZ;
		Position = Vector3.Zero;
		Up = Vector3.UnitY;
		Velocity = Vector3.Zero;

		/* Unexposed variables, defaults based on XNA behavior */
		listenerData.pCone = IntPtr.Zero;
	}
}