197 lines
4.6 KiB
C++
197 lines
4.6 KiB
C++
// joystick.cxx -- joystick support
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//
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// Written by Curtis Olson, started October 1998.
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//
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// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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# include <windows.h>
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#endif
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#include <Aircraft/aircraft.hxx>
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#include <Debug/logstream.hxx>
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#if defined( ENABLE_LINUX_JOYSTICK )
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# include <plib/js.h>
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#elif defined( ENABLE_GLUT_JOYSTICK )
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# include <GL/glut.h>
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# include <XGL/xgl.h>
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#endif
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#include "joystick.hxx"
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#if defined( ENABLE_LINUX_JOYSTICK )
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// joystick classes
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static jsJoystick *js0;
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static jsJoystick *js1;
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// these will hold the values of the axes
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static float *js_ax0, *js_ax1;
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#elif defined( ENABLE_GLUT_JOYSTICK )
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// Do we want these user settable ??
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static float joy_scale = 1./1000;
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// play with following to get your desired sensitivity
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static int x_dead_zone = 50;
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static int y_dead_zone = 2*x_dead_zone;
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// Joystick support using glut -- William Riley -- riley@technologist.com
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// Joystick fixed values for calibration and scaling
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static float joy_x_max = joy_scale;
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static float joy_y_max = joy_scale;
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static int joy_z_min = 1000, /* joy_z_ctr=0, */ joy_z_max = -1000;
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static int joy_z_dead_min = 100, joy_z_dead_max = -100;
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#else
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# error port me: no joystick support
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#endif
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#if defined( ENABLE_GLUT_JOYSTICK )
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// Function called by glutJoystickFunc(), adjusts read values and
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// passes them to the necessary aircraft control functions
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void joystick(unsigned int buttonMask, int js_x, int js_y, int js_z)
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{
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float joy_x, joy_y, joy_z;
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// adjust the values to fgfs's scale and allow a 'dead zone' to
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// reduce jitter code adapted from joystick.c by Michele
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// F. America - nomimarketing@mail.telepac.pt
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if( js_x > -x_dead_zone && js_x < x_dead_zone) {
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joy_x = 0.0;
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} else {
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joy_x = js_x * joy_scale;
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}
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if( js_y > -y_dead_zone && js_y < y_dead_zone) {
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joy_y = 0.0;
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} else {
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joy_y = js_y * joy_scale;
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}
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if( js_z >= joy_z_dead_min && js_z <= joy_z_dead_max ) {
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joy_z = 0.0;
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}
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joy_z = (float)js_z / (float)(joy_z_max - joy_z_min);
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joy_z = (((joy_z*2.0)+1.0)/2);
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// Pass the values to the control routines
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controls.set_elevator( -joy_y );
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controls.set_aileron( joy_x );
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controls.set_throttle( FGControls::ALL_ENGINES, joy_z );
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}
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#endif // ENABLE_GLUT_JOYSTICK
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// Initialize the joystick(s)
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int fgJoystickInit( void ) {
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FG_LOG( FG_INPUT, FG_INFO, "Initializing joystick" );
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#if defined( ENABLE_LINUX_JOYSTICK )
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js0 = new jsJoystick ( 0 );
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js1 = new jsJoystick ( 1 );
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if ( js0->notWorking () ) {
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// not working
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} else {
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// allocate storage for axes values
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js_ax0 = new float [ js0->getNumAxes() ];
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// configure
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js0->setDeadBand( 0, 0.1 );
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js0->setDeadBand( 1, 0.1 );
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FG_LOG ( FG_INPUT, FG_INFO,
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" Joystick 0 detected with " << js0->getNumAxes()
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<< " axes" );
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}
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if ( js1->notWorking () ) {
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// not working
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} else {
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// allocate storage for axes values
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js_ax1 = new float [ js1->getNumAxes() ];
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// configure
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js1->setDeadBand( 0, 0.1 );
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js1->setDeadBand( 1, 0.1 );
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FG_LOG ( FG_INPUT, FG_INFO,
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" Joystick 1 detected with " << js1->getNumAxes()
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<< " axes" );
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}
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if ( js0->notWorking() && js1->notWorking() ) {
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FG_LOG ( FG_INPUT, FG_INFO, " No joysticks detected" );
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return 0;
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}
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#elif defined( ENABLE_GLUT_JOYSTICK )
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glutJoystickFunc(joystick, 100);
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#else
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# error port me: no joystick support
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#endif
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return 1;
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}
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#if defined( ENABLE_LINUX_JOYSTICK )
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// update the control parameters based on joystick intput
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int fgJoystickRead( void ) {
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int b;
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if ( ! js0->notWorking() ) {
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js0->read( &b, js_ax0 ) ;
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controls.set_aileron( js_ax0[0] );
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controls.set_elevator( -js_ax0[1] );
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}
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if ( ! js1->notWorking() ) {
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js1->read( &b, js_ax1 ) ;
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controls.set_rudder( js_ax1[0] );
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controls.set_throttle( FGControls::ALL_ENGINES, -js_ax1[1] * 1.05 );
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}
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return 1;
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}
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#endif // ENABLE_LINUX_JOYSTICK
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