HydroSDL/joystick_SDL/joystick_SDL.cpp

Go to the documentation of this file.

#include "SDL.h"
#include "joystick_SDL.h"


int numJoy; // number of joystick available
int numAxes;
int thereIsJoy=0;
SDL_Joystick* joystick;
        
        

int joystick_init()
{
        int dummy;
        
        if ( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_JOYSTICK) < 0 )
        {
                fprintf(stderr, "Couldn't initialize joystick: %s\n",SDL_GetError());
        }
        
        numJoy = SDL_NumJoysticks();
        
        printf("Number of joysticks: %d \n", numJoy);
        
        if (numJoy>0)
        {
                joystick = SDL_JoystickOpen(0); //use first joystick, if any
                numAxes = SDL_JoystickNumAxes (joystick);
                printf( "Joystick found, Number of axes: %d, name: %s \n", numAxes, SDL_JoystickName(0));
                dummy = SDL_JoystickEventState(SDL_QUERY);
                thereIsJoy=1;
        }
        else
        {
                fprintf( stderr, "No Joystick could be opened!! \n");
                thereIsJoy=0;
        }
        
        return 1;
}




void joystick_getXYZR(float *X, float *Y, float *Z, float *R, bool doX, bool doY, bool doZ, bool doR)
{
        if (SDL_JoystickOpened(0))
        {
                if (numAxes>0 && doX) *X = (float(SDL_JoystickGetAxis(joystick, 0))/32768.0f);
                if (numAxes>1 && doY) *Y = (float(SDL_JoystickGetAxis(joystick, 1))/32768.0f);
                if (numAxes>2 && doZ) *Z = (float(SDL_JoystickGetAxis(joystick, 2))/32768.0f);
                if (numAxes>3 && doR) *R = (float(SDL_JoystickGetAxis(joystick, 3))/32768.0f);
        }
}




void joystick_close()
{
        if (numJoy>0)
        {
                SDL_JoystickClose(joystick); // Close joystick, if any
                printf("Joystick closed.");
        }
}



int is_there_a_joystick()
{
        return thereIsJoy;
}

---