1 // joystick.cxx -- joystick support
3 // Written by Curtis Olson, started October 1998.
5 // Copyright (C) 1998 - 1999 Curtis L. Olson - curt@flightgear.org
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>
34 #include <Main/options.hxx>
36 #if defined( ENABLE_PLIB_JOYSTICK )
37 # include <js.h> // plib include
38 #elif defined( ENABLE_GLUT_JOYSTICK )
44 #include "joystick.hxx"
47 #if defined( ENABLE_PLIB_JOYSTICK )
50 static jsJoystick *js0;
51 static jsJoystick *js1;
53 // these will hold the values of the axes
54 static float *js_ax0, *js_ax1;
56 #elif defined( ENABLE_GLUT_JOYSTICK )
58 // Do we want these user settable ??
59 static float joy_scale = 1./1000;
61 // play with following to get your desired sensitivity
62 static int x_dead_zone = 50;
63 static int y_dead_zone = 2*x_dead_zone;
65 // Joystick support using glut -- William Riley -- riley@technologist.com
67 // Joystick fixed values for calibration and scaling
68 static float joy_x_max = joy_scale;
69 static float joy_y_max = joy_scale;
71 static int joy_z_min = 1000, /* joy_z_ctr=0, */ joy_z_max = -1000;
72 static int joy_z_dead_min = 100, joy_z_dead_max = -100;
74 #elif defined( MACOS )
75 # warning port me: no joystick support
77 # error port me: no joystick support
82 #if defined( ENABLE_GLUT_JOYSTICK )
84 // Function called by glutJoystickFunc(), adjusts read values and
85 // passes them to the necessary aircraft control functions
86 void joystick(unsigned int buttonMask, int js_x, int js_y, int js_z)
88 float joy_x, joy_y, joy_z;
89 // adjust the values to fgfs's scale and allow a 'dead zone' to
90 // reduce jitter code adapted from joystick.c by Michele
91 // F. America - nomimarketing@mail.telepac.pt
93 if( js_x > -x_dead_zone && js_x < x_dead_zone) {
96 joy_x = js_x * joy_scale;
99 if( js_y > -y_dead_zone && js_y < y_dead_zone) {
102 joy_y = js_y * joy_scale;
105 if( js_z >= joy_z_dead_min && js_z <= joy_z_dead_max ) {
108 joy_z = (float)js_z / (float)(joy_z_max - joy_z_min);
109 joy_z = (((joy_z*2.0)+1.0)/2);
111 // Pass the values to the control routines
112 controls.set_elevator( -joy_y );
113 controls.set_aileron( joy_x );
114 controls.set_throttle( FGControls::ALL_ENGINES, joy_z );
117 #endif // ENABLE_GLUT_JOYSTICK
120 // Initialize the joystick(s)
121 int fgJoystickInit( void ) {
123 FG_LOG( FG_INPUT, FG_INFO, "Initializing joystick" );
125 #if defined( ENABLE_PLIB_JOYSTICK )
127 js0 = new jsJoystick ( 0 );
128 js1 = new jsJoystick ( 1 );
130 if ( js0->notWorking () ) {
133 // allocate storage for axes values
134 js_ax0 = new float [ js0->getNumAxes() ];
137 js0->setDeadBand( 0, 0.1 );
138 js0->setDeadBand( 1, 0.1 );
140 FG_LOG ( FG_INPUT, FG_INFO,
141 " Joystick 0 detected with " << js0->getNumAxes()
145 if ( js1->notWorking () ) {
148 // allocate storage for axes values
149 js_ax1 = new float [ js1->getNumAxes() ];
152 js1->setDeadBand( 0, 0.1 );
153 js1->setDeadBand( 1, 0.1 );
155 FG_LOG ( FG_INPUT, FG_INFO,
156 " Joystick 1 detected with " << js1->getNumAxes()
160 if ( js0->notWorking() && js1->notWorking() ) {
161 FG_LOG ( FG_INPUT, FG_INFO, " No joysticks detected" );
165 // I hate doing this sort of thing, but it's overridable from the
166 // command line/config file. If the user hasn't specified an
167 // autocoordination preference, and if they have a single 2 axis
168 // joystick, then automatical enable auto_coordination.
170 if ( (current_options.get_auto_coordination() ==
171 fgOPTIONS::FG_AUTO_COORD_NOT_SPECIFIED) &&
172 (!js0->notWorking() && js1->notWorking() && (js0->getNumAxes() < 3)
176 current_options.set_auto_coordination(fgOPTIONS::FG_AUTO_COORD_ENABLED);
180 #elif defined( ENABLE_GLUT_JOYSTICK )
182 glutJoystickFunc(joystick, 100);
184 #elif defined( MACOS )
185 # warning port me: no joystick support
187 # error port me: no joystick support
194 #if defined( ENABLE_PLIB_JOYSTICK )
196 // update the control parameters based on joystick intput
197 int fgJoystickRead( void ) {
200 if ( ! js0->notWorking() ) {
201 js0->read( &b, js_ax0 ) ;
202 controls.set_aileron( js_ax0[0] );
203 controls.set_elevator( -js_ax0[1] );
205 // Added by William Riley -- riley@technologist.com
206 if ( js0->getNumAxes() >= 3 ) {
207 controls.set_throttle( FGControls::ALL_ENGINES,
208 ((-js_ax0[2] + 1) / 2) );
210 if ( js0->getNumAxes() > 3 ) {
211 if ( current_options.get_auto_coordination() !=
212 fgOPTIONS::FG_AUTO_COORD_ENABLED )
214 controls.set_rudder( js_ax0[3] );
217 // End of William's code
221 if ( ! js1->notWorking() ) {
222 js1->read( &b, js_ax1 ) ;
223 if ( current_options.get_auto_coordination() !=
224 fgOPTIONS::FG_AUTO_COORD_ENABLED )
226 controls.set_rudder( js_ax1[0] );
228 controls.set_throttle( FGControls::ALL_ENGINES, -js_ax1[1] * 1.05 );
234 #endif // ENABLE_PLIB_JOYSTICK