listener.h

// © Copyright 2010 - 2014 BlackTopp Studios Inc.
/* This file is part of The Mezzanine Engine.

    The Mezzanine Engine is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    The Mezzanine Engine is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with The Mezzanine Engine.  If not, see <http://www.gnu.org/licenses/>.
*/
/* The original authors have included a copy of the license specified above in the
   'Docs' folder. See 'gpl.txt'
*/
/* We welcome the use of the Mezzanine engine to anyone, including companies who wish to
   Build professional software and charge for their product.

   However there are some practical restrictions, so if your project involves
   any of the following you should contact us and we will try to work something
   out:
    - DRM or Copy Protection of any kind(except Copyrights)
    - Software Patents You Do Not Wish to Freely License
    - Any Kind of Linking to Non-GPL licensed Works
    - Are Currently In Violation of Another Copyright Holder's GPL License
    - If You want to change our code and not add a few hundred MB of stuff to
        your distribution

   These and other limitations could cause serious legal problems if you ignore
   them, so it is best to simply contact us or the Free Software Foundation, if
   you have any questions.

   Joseph Toppi - toppij@gmail.com
   John Blackwood - makoenergy02@gmail.com
*/
// Copyright (c) 2008-2010 Raynaldo (Wildicv) Rivera, Joshua (Dark_Kilauea) Jones
// This file is part of the "cAudio Engine"
// For conditions of distribution and use, see copyright notice in cAudio-ZLIBLicense.txt
#ifndef _audiolistener_h
#define _audiolistener_h

#include "worldproxy.h"

namespace Mezzanine
{
    namespace Audio
    {
        ///////////////////////////////////////////////////////////////////////////////
        /// @brief This is an interface class for a listener (such as a player) in the 3D audio world.
        /// @details
        ///////////////////////////////////////
        class iListener : public WorldProxy
        {
        public:
            /// @brief Class constructor.
            iListener() {  }
            /// @brief Class destructor.
            virtual ~iListener() {  }

            ///////////////////////////////////////////////////////////////////////////////
            // Utility

            /// @brief Sets the moving velocity of this listener.
            /// @param Vel The velocity this listener is to be given.
            virtual void SetVelocity(const Vector3& Vel) = 0;
            /// @brief Gets the current velocity of this listener.
            /// @return Returns a Vector3 containing the current velocity of this listener.
            virtual Vector3 GetVelocity() const = 0;

            /// @brief Sets the modifier to use that will adjust the volume of all audio heard by this listener.
            /// @param Vol The modifier to be set.  Range 0.0 to +Inf.
            virtual void SetVolumeModifier(const Real Vol) = 0;
            /// @brief Gets the modifier applied to all audio heard by this listener.
            /// @return Returns the currently set volume modifier.
            virtual Real GetVolumeModifier() const = 0;
            /// @brief Sets the number of meters in a single unit of world space.
            /// @param Meters The number of meters in a single unit of world space.
            virtual void SetMetersPerUnit(const Real Meters) = 0;
            /// @brief Gets the currently set number of meters in a single unit of world space.
            /// @return Returns a Real representing the number of meters in a unit of world space.
            virtual Real GetMetersPerUnit() const = 0;

            ///////////////////////////////////////////////////////////////////////////////
            // Serialization

            /// @brief Get the name of the the XML tag the Renderable class will leave behind as its instances are serialized.
            /// @return A string containing the name of this class.
            static String SerializableName() { return "iListener"; }
        };//iListener
    }//Audio
}//Mezzanine

#endif