jsinput.cxx

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// jsinput.cxx -- wait for and identify input from joystick
//
// Written by Tony Peden, started May 2001
//
// Copyright (C) 2001  Tony Peden (apeden@earthlink.net)
//
// This program 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 2 of the
// License, or (at your option) any later version.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
#include <simgear/compiler.h>
 
#include <iostream>
 
using std::cout;
using std::cin;
using std::endl;
 
#include "jsinput.h"
 
#include <simgear/timing/timestamp.hxx>
 
jsInput::jsInput(jsSuper *j) {
    jss=j;
    pretty_display=true;
    joystick=axis=button=-1;
    axis_threshold=0.2;
}
 
jsInput::~jsInput(void) {}
 
int jsInput::getInput() {
 
    bool gotit=false;
 
    float delta;
    int i, current_button = 0, button_bits = 0;
 
    joystick=axis=button=-1;
    axis_positive=false;
 
    if(pretty_display) {
        printf ( "+----------------------------------------------\n" ) ;
        printf ( "| Btns " ) ;
 
        for ( i = 0 ; i < jss->getJoystick()->getNumAxes() ; i++ )
            printf ( "Ax:%3d ", i ) ;
 
        for ( ; i < 8 ; i++ )
            printf ( "     " ) ;
 
        printf ( "|\n" ) ;
 
        printf ( "+----------------------------------------------\n" ) ;
    }
 
 
    jss->firstJoystick();
    do {
        jss->getJoystick()->read ( &button_iv[jss->getCurrentJoystickId()],
                axes_iv[jss->getCurrentJoystickId()] ) ;
    } while( jss->nextJoystick() );
 
 
 
    while(!gotit) {
        jss->firstJoystick();
        do {
 
            jss->getJoystick()->read ( &current_button, axes ) ;
 
            if(pretty_display) printf ( "| %04x ", current_button ) ;
 
            for ( i = 0 ; i < jss->getJoystick()->getNumAxes(); i++ ) {
 
                delta = axes[i] - axes_iv[jss->getCurrentJoystickId()][i];
                if(pretty_display) printf ( "%+.3f ", delta ) ;
                if(!gotit) {
                    if( fabs(delta) > axis_threshold ) {
                        gotit=true;
                        joystick=jss->getCurrentJoystickId();
                        axis=i;
                        axis_positive=(delta>0);
                    } else if( current_button != 0 ) {
                        gotit=true;
                        joystick=jss->getCurrentJoystickId();
                        button_bits=current_button;
                    }
                }
            }
 
            if(pretty_display) {
                for ( ; i < 8 ; i++ )
                    printf ( "  .  " ) ;
            }
 
 
        } while( jss->nextJoystick() && !gotit);
        if(pretty_display) {
            printf ( "|\r" ) ;
            fflush ( stdout ) ;
        }
 
        SGTimeStamp::sleepForMSec(1);
    }
    if(button_bits != 0) {
        for(int i=0;i<=31;i++) {
            if( ( button_bits & (1u << i) ) > 0 ) {
                button=i;
                break;
            }
        }
    }
 
    return 0;
}
 
void jsInput::findDeadBand() {
 
    float delta;
    int i;
    float dead_band[MAX_JOYSTICKS][_JS_MAX_AXES];
 
    jss->firstJoystick();
    do {
        jss->getJoystick()->read ( NULL,
                axes_iv[jss->getCurrentJoystickId()] ) ;
        for ( i = 0; i <  jss->getJoystick()->getNumAxes(); i++ ) {
            dead_band[jss->getCurrentJoystickId()][i] = 0;
        }
    } while( jss->nextJoystick() );
 
    SGTimeStamp clock = SGTimeStamp::now();
    cout << 10;
    cout.flush();
 
    for (int j = 9; j >= 0; j--) {
        clock.stamp();
        do {
            jss->firstJoystick();
            do {
 
                jss->getJoystick()->read ( NULL, axes ) ;
 
                for ( i = 0 ; i < jss->getJoystick()->getNumAxes(); i++ ) {
 
                    delta = axes[i] - axes_iv[jss->getCurrentJoystickId()][i];
                    if (fabs(delta) > dead_band[jss->getCurrentJoystickId()][i])
                        dead_band[jss->getCurrentJoystickId()][i] = delta;
                }
 
            } while( jss->nextJoystick());
 
            SGTimeStamp::sleepForMSec(1);
        } while (clock.elapsedMSec() < 1000);
 
        cout << " - " << j;
        cout.flush();
    }
    cout << endl << endl;
 
    jss->firstJoystick();
    do {
        for ( i = 0; i <  jss->getJoystick()->getNumAxes(); i++ ) {
            jss->getJoystick()->setDeadBand(i, dead_band[jss->getCurrentJoystickId()][i]);
            printf("Joystick %i, axis %i: %f\n", jss->getCurrentJoystickId(), i, dead_band[jss->getCurrentJoystickId()][i]);
        }
    } while( jss->nextJoystick() );
}