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LibN2L-4 Library Code Reference

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events

cJoystick.cpp

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00001 #include "events/cJoystick.h"
00002 #include "events/constants.h"
00003 
00004 /******************************************************************************/
00005 namespace n2l {
00006 
00007     /**************************************************************************/
00008     cJoystick::cJoystick( const tUint iSDLJoyIndex )
00009     {
00010         requireSDLSubSystem(SDLSubSystemInitFlag_Joystick);
00011 
00012         if (iSDLJoyIndex>=tUint(SDL_NumJoysticks()))
00013             throw cOutOfBoundsException("cJoystick::cJoystick",
00014                 "Joystick out of range, how the hell did that happen?");
00015 
00016         mSDLJoyIndex = iSDLJoyIndex;
00017         
00018         mJoy = SDL_JoystickOpen( mSDLJoyIndex );
00019         if (!mJoy)
00020             throw cSDLException( "cJoystick::cJoystick",
00021                 "Failed to open requested Joystick: "+asString(iSDLJoyIndex) );
00022 
00023         mName = SDL_JoystickName( mSDLJoyIndex );
00024 
00025         mNumAxes = SDL_JoystickNumAxes(mJoy);
00026         mNumBalls = SDL_JoystickNumBalls(mJoy);
00027         mNumHats = SDL_JoystickNumHats(mJoy);
00028         mNumButtons = SDL_JoystickNumButtons(mJoy);
00029 
00030         mAxisValue = new tFloat[mNumAxes];
00031         mAxisInvert = new tBool[mNumAxes];
00032         for (tUint i=0; i<mNumAxes; ++i)
00033             mAxisInvert[i] = false;
00034     }
00035 
00036     /**************************************************************************/
00037     cJoystick::~cJoystick()
00038     {
00039         SDL_JoystickClose( mJoy );
00040         releaseSDLSubSystem(SDLSubSystemInitFlag_Joystick);
00041     }
00042 
00043     /**************************************************************************/
00044     const tFloat &cJoystick::axis( const tUint iNum ) const
00045     {
00046         if (iNum>=mNumAxes)
00047             throw cOutOfBoundsException( "cJoystick::axis",
00048                 "No such joystick axis on "+mName, asString(iNum) );
00049         const tFloat Val = SDL_JoystickGetAxis(mJoy, iNum);
00050         if (mAxisInvert[iNum])
00051             mAxisValue[iNum] = Val/JoystickAxisInverseMagBound;
00052         else 
00053             mAxisValue[iNum] = Val/JoystickAxisMagBound;
00054         return mAxisValue[iNum];
00055     }
00056         
00057     /**************************************************************************/
00058     const tBool cJoystick::button( const tUint iNum ) const
00059     {
00060         if (iNum>=mNumButtons)
00061             throw cOutOfBoundsException( "cJoystick::button",
00062                 "No such joystick button on "+mName, asString(iNum) );
00063 
00064         return SDL_JoystickGetButton(mJoy,iNum);
00065     }
00066 
00067     /**************************************************************************/
00068     const tUint cJoystick::hat( const tUint iNum ) const
00069     {
00070         if (iNum>=mNumHats)
00071             throw cOutOfBoundsException( "cJoystick::hat",
00072                 "No such joystick hat on "+mName, asString(iNum) );
00073 
00074         return SDL_JoystickGetHat(mJoy,iNum);
00075     }
00076 
00077     /**************************************************************************/
00078     void cJoystick::inverted( const tUint iAxis, const tBool iValue )
00079     {
00080         if (iAxis>=mNumAxes)
00081             throw cOutOfBoundsException( "cJoystick::inverted",
00082                 "No such joystick axis on "+mName, asString(iAxis) );
00083         mAxisInvert[iAxis] = iValue;
00084     }
00085 
00086 }
©2013 Aaron Cameron