source: code/trunk/src/external/ois/OISEffect.h @ 6978

/*
The zlib/libpng License

Copyright (c) 2005-2007 Phillip Castaneda (pjcast -- www.wreckedgames.com)

This software is provided 'as-is', without any express or implied warranty. In no event will
the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial
applications, and to alter it and redistribute it freely, subject to the following
restrictions:

    1. The origin of this software must not be misrepresented; you must not claim that
                you wrote the original software. If you use this software in a product,
                an acknowledgment in the product documentation would be appreciated but is
                not required.

    2. Altered source versions must be plainly marked as such, and must not be
                misrepresented as being the original software.

    3. This notice may not be removed or altered from any source distribution.
*/
#ifndef OIS_Effect_H
#define OIS_Effect_H

#include "OISPrereqs.h"

namespace OIS
{
        //Predeclare some Effect Property structs
        class ForceEffect;
        class ConstantEffect;
        class RampEffect;
        class PeriodicEffect;
        class ConditionalEffect;

        /**
                Force Feedback is a relatively complex set of properties to upload to a device.
                The best place for information on the different properties, effects, etc is in
                the DX Documentation and MSDN - there are even pretty graphs ther =)
                As this class is modeled on the the DX interface you can apply that same
                knowledge to creating effects via this class on any OS supported by OIS.

                In anycase, this is the main class you will be using. There is *absolutely* no
                need to instance any of the supporting ForceEffect classes yourself.
        */
        class _OISExport Effect
        {
                /**
                        hidden so this class cannot be instanced with default constructor
                */
                Effect();
        public:
                //! Type of force
                enum EForce
                {
                        UnknownForce = 0,
                        ConstantForce,
                        RampForce,
                        PeriodicForce,
                        ConditionalForce,
                        CustomForce,
                        _ForcesNumber // Always keep in last position.
                };

                static const char* getForceTypeName(EForce eValue);

                //! Type of effect
                enum EType
                {
                        //Type ----- Pairs with force:
                        Unknown = 0, //UnknownForce
                        Constant,    //ConstantForce
                        Ramp,        //RampForce
                        Square,      //PeriodicForce
                        Triangle,    //PeriodicForce
            Sine,        //PeriodicForce
                        SawToothUp,  //PeriodicForce
                        SawToothDown,//PeriodicForce
                        Friction,    //ConditionalForce
                        Damper,      //ConditionalForce
                        Inertia,     //ConditionalForce
                        Spring,      //ConditionalForce
                        Custom,      //CustomForce
                        _TypesNumber // Always keep in last position.
                };

                static const char* getEffectTypeName(EType eValue);

                //! Direction of the Force
                enum EDirection
                {
                        NorthWest,
                        North,
                        NorthEast,
                        East,
                        SouthEast,
                        South,
                        SouthWest,
                        West,
                        _DirectionsNumber // Always keep in last position.
                };

                static const char* getDirectionName(EDirection eValue);

                /**
                        This constructor allows you to set the force type and effect.
                */
                Effect(EForce ef, EType et);
                virtual ~Effect();

                const EForce force;
                const EType type;

                //Infinite Time
                static const unsigned int OIS_INFINITE = 0xFFFFFFFF;

                //-------------------------------------------------------------------//
                //--- Set these variables before uploading or modifying an effect ---//

                //Direction to apply to the force - affects two axes+ effects
                EDirection direction;

                //Number of button triggering an effect (-1 means no trigger)
                short trigger_button;

                //Time to wait before an effect can be re-triggered (microseconds)
                unsigned int trigger_interval;

                //Duration of an effect (microseconds)
                unsigned int replay_length;

                //Time to wait before to start playing an effect (microseconds)
                unsigned int replay_delay;

                //Get the specific Force Effect. This should be cast depending on the EForce
                ForceEffect* getForceEffect() const;

                /**
                @remarks
                        Set the number of Axes to use before the initial creation of the effect.
                        Can only be done prior to creation! Use the FF interface to determine
                        how many axes can be used (are availiable)
                */
                void setNumAxes(short nAxes);

                /**
                @remarks
                        Returns the number of axes used in this effect
                */
                short getNumAxes() const;

                //------------- Library Internal -------------------------------------//
                /**
                        set internally.. do not change or you will not be able to upload/stop
                        this effect any more. It will become lost. It is mutable so even
                        with const reference it can/will be changed by this lib
                */
                mutable int _handle;
        protected:
                ForceEffect* effect; //Properties depend on EForce
                short axes;          //Number of axes to use in effect
        };

        //-----------------------------------------------------------------------------//
        /**
                Base class of all effect property classes
        */
        class _OISExport ForceEffect
        {
        public:
                virtual ~ForceEffect() {}
        };

        //-----------------------------------------------------------------------------//
        /**
                An optional envelope to be applied to the start/end of an effect. If any of
                these values are nonzero, then the envelope will be used in setting up the
                effect.
        */
        class _OISExport Envelope : public ForceEffect
        {
        public:
                Envelope() : attackLength(0), attackLevel(0), fadeLength(0), fadeLevel(0) {}
#if defined(OIS_MSVC_COMPILER)
  #pragma warning (push)
  #pragma warning (disable : 4800)
#endif
                bool isUsed() const { return attackLength | attackLevel | fadeLength | fadeLevel; }
#if defined(OIS_MSVC_COMPILER)
  #pragma warning (pop)
#endif

                // Duration of the attack (microseconds)
                unsigned int attackLength;

                // Absolute level at the beginning of the attack (0 to 10K)
                // (automatically signed when necessary by FF core according to effect level sign)
                unsigned short attackLevel;

                // Duration of fade (microseconds)
                unsigned int fadeLength;

                // Absolute level at the end of fade (0 to 10K)
                // (automatically signed when necessary by FF core according to effect level sign)
                unsigned short fadeLevel;
        };

        //-----------------------------------------------------------------------------//
        /**
                Use this class when dealing with Force type of Constant
        */
        class _OISExport ConstantEffect : public ForceEffect
        {
        public:
                ConstantEffect() : level(5000) {}

                class Envelope envelope; //Optional envolope
                signed short level;       //-10K to +10k
        };

        //-----------------------------------------------------------------------------//
        /**
                Use this class when dealing with Force type of Ramp
        */
        class _OISExport RampEffect : public ForceEffect
        {
        public:
                RampEffect() : startLevel(0), endLevel(0) {}

        class Envelope envelope; //Optional envelope
                signed short startLevel;  //-10K to +10k
                signed short endLevel;    //-10K to +10k
        };

        //-----------------------------------------------------------------------------//
        /**
                Use this class when dealing with Force type of Periodic
        */
        class _OISExport PeriodicEffect : public ForceEffect
        {
        public:
                PeriodicEffect() : magnitude(0), offset(0), phase(0), period(0) {}

                class Envelope envelope;  //Optional Envelope

                unsigned short magnitude;  //0 to 10,0000
                signed short   offset;
                unsigned short phase;      //Position at which playback begins 0 to 35,999
                unsigned int   period;     //Period of effect (microseconds)
        };

        //-----------------------------------------------------------------------------//
        /**
                Use this class when dealing with Force type of Condional
        */
        class _OISExport ConditionalEffect : public ForceEffect
        {
        public:
                ConditionalEffect() :
            rightCoeff(0), leftCoeff(0), rightSaturation(0), leftSaturation(0),
                        deadband(0), center(0) {}

                signed short   rightCoeff;      //-10k to +10k (Positive Coeff)
                signed short   leftCoeff;       //-10k to +10k (Negative Coeff)

                unsigned short rightSaturation; //0 to 10k (Pos Saturation)
                unsigned short leftSaturation;  //0 to 10k (Neg Saturation)

                //Region around center in which the condition is not active, in the range
                //from 0 through 10,000
                unsigned short deadband;

                //(Offset in DX) -10k and 10k
                signed short center;
        };
}
#endif //OIS_Effect_H