1 // joystick.cxx -- joystick support
3 // Written by Curtis Olson, started October 1998.
5 // Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32 #include <Aircraft/aircraft.hxx>
33 #include <Debug/logstream.hxx>
35 #if defined( ENABLE_LINUX_JOYSTICK )
37 #elif defined( ENABLE_GLUT_JOYSTICK )
43 #include "joystick.hxx"
46 #if defined( ENABLE_LINUX_JOYSTICK )
49 static jsJoystick *js0;
50 static jsJoystick *js1;
52 // these will hold the values of the axes
53 static float *js_ax0, *js_ax1;
55 #elif defined( ENABLE_GLUT_JOYSTICK )
57 // Do we want these user settable ??
58 static float joy_scale = 1./1000;
60 // play with following to get your desired sensitivity
61 static int x_dead_zone = 50;
62 static int y_dead_zone = 2*x_dead_zone;
64 // Joystick support using glut -- William Riley -- riley@technologist.com
66 // Joystick fixed values for calibration and scaling
67 static float joy_x_max = joy_scale;
68 static float joy_y_max = joy_scale;
70 static int joy_z_min = 1000, /* joy_z_ctr=0, */ joy_z_max = -1000;
71 static int joy_z_dead_min = 100, joy_z_dead_max = -100;
74 # error port me: no joystick support
79 #if defined( ENABLE_GLUT_JOYSTICK )
81 // Function called by glutJoystickFunc(), adjusts read values and
82 // passes them to the necessary aircraft control functions
83 void joystick(unsigned int buttonMask, int js_x, int js_y, int js_z)
85 float joy_x, joy_y, joy_z;
86 // adjust the values to fgfs's scale and allow a 'dead zone' to
87 // reduce jitter code adapted from joystick.c by Michele
88 // F. America - nomimarketing@mail.telepac.pt
90 if( js_x > -x_dead_zone && js_x < x_dead_zone) {
93 joy_x = js_x * joy_scale;
96 if( js_y > -y_dead_zone && js_y < y_dead_zone) {
99 joy_y = js_y * joy_scale;
102 if( js_z >= joy_z_dead_min && js_z <= joy_z_dead_max ) {
105 joy_z = (float)js_z / (float)(joy_z_max - joy_z_min);
106 joy_z = (((joy_z*2.0)+1.0)/2);
108 // Pass the values to the control routines
109 controls.set_elevator( -joy_y );
110 controls.set_aileron( joy_x );
111 controls.set_throttle( FGControls::ALL_ENGINES, joy_z );
114 #endif // ENABLE_GLUT_JOYSTICK
117 // Initialize the joystick(s)
118 int fgJoystickInit( void ) {
120 FG_LOG( FG_INPUT, FG_INFO, "Initializing joystick" );
122 #if defined( ENABLE_LINUX_JOYSTICK )
124 js0 = new jsJoystick ( 0 );
125 js1 = new jsJoystick ( 1 );
127 if ( js0->notWorking () ) {
130 // allocate storage for axes values
131 js_ax0 = new float [ js0->getNumAxes() ];
134 js0->setDeadBand( 0, 0.1 );
135 js0->setDeadBand( 1, 0.1 );
137 FG_LOG ( FG_INPUT, FG_INFO,
138 " Joystick 0 detected with " << js0->getNumAxes()
142 if ( js1->notWorking () ) {
145 // allocate storage for axes values
146 js_ax1 = new float [ js1->getNumAxes() ];
149 js1->setDeadBand( 0, 0.1 );
150 js1->setDeadBand( 1, 0.1 );
152 FG_LOG ( FG_INPUT, FG_INFO,
153 " Joystick 1 detected with " << js1->getNumAxes()
157 if ( js0->notWorking() && js1->notWorking() ) {
158 FG_LOG ( FG_INPUT, FG_INFO, " No joysticks detected" );
162 #elif defined( ENABLE_GLUT_JOYSTICK )
164 glutJoystickFunc(joystick, 100);
167 # error port me: no joystick support
174 #if defined( ENABLE_LINUX_JOYSTICK )
176 // update the control parameters based on joystick intput
177 int fgJoystickRead( void ) {
180 if ( ! js0->notWorking() ) {
181 js0->read( &b, js_ax0 ) ;
182 controls.set_aileron( js_ax0[0] );
183 controls.set_elevator( -js_ax0[1] );
186 if ( ! js1->notWorking() ) {
187 js1->read( &b, js_ax1 ) ;
188 controls.set_rudder( js_ax1[0] );
189 controls.set_throttle( FGControls::ALL_ENGINES, -js_ax1[1] * 1.05 );
195 #endif // ENABLE_LINUX_JOYSTICK