1 // native_gui.cxx -- FGFS external gui data export class
3 // Written by Curtis Olson, started January 2002.
5 // Copyright (C) 2002 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.
28 #include <simgear/debug/logstream.hxx>
29 #include <simgear/io/lowlevel.hxx> // endian tests
30 #include <simgear/io/iochannel.hxx>
31 #include <simgear/timing/sg_time.hxx>
33 #include <Cockpit/radiostack.hxx>
34 #include <FDM/flight.hxx>
35 #include <Time/tmp.hxx>
36 #include <Main/fg_props.hxx>
37 #include <Main/globals.hxx>
39 #include "native_gui.hxx"
41 // FreeBSD works better with this included last ... (?)
42 #if defined(WIN32) && !defined(__CYGWIN__)
45 # include <netinet/in.h> // htonl() ntohl()
49 // #define FG_USE_NETWORK_BYTE_ORDER
50 #if defined( FG_USE_NETWORK_BYTE_ORDER )
52 // The function htond is defined this way due to the way some
53 // processors and OSes treat floating point values. Some will raise
54 // an exception whenever a "bad" floating point value is loaded into a
55 // floating point register. Solaris is notorious for this, but then
56 // so is LynxOS on the PowerPC. By translating the data in place,
57 // there is no need to load a FP register with the "corruped" floating
58 // point value. By doing the BIG_ENDIAN test, I can optimize the
59 // routine for big-endian processors so it can be as efficient as
61 static void htond (double &x)
63 if ( sgIsLittleEndian() ) {
67 Double_Overlay = (int *) &x;
68 Holding_Buffer = Double_Overlay [0];
70 Double_Overlay [0] = htonl (Double_Overlay [1]);
71 Double_Overlay [1] = htonl (Holding_Buffer);
76 static void htonf (float &x)
78 if ( sgIsLittleEndian() ) {
82 Float_Overlay = (int *) &x;
83 Holding_Buffer = Float_Overlay [0];
85 Float_Overlay [0] = htonl (Holding_Buffer);
93 FGNativeGUI::FGNativeGUI() {
96 FGNativeGUI::~FGNativeGUI() {
100 // open hailing frequencies
101 bool FGNativeGUI::open() {
102 if ( is_enabled() ) {
103 SG_LOG( SG_IO, SG_ALERT, "This shouldn't happen, but the channel "
104 << "is already in use, ignoring" );
108 SGIOChannel *io = get_io_channel();
110 if ( ! io->open( get_direction() ) ) {
111 SG_LOG( SG_IO, SG_ALERT, "Error opening channel communication layer." );
117 cur_fdm_state->_set_Sea_level_radius( SG_EQUATORIAL_RADIUS_FT );
122 void FGProps2NetGUI( FGNetGUI *net ) {
125 // Version sanity checking
126 net->version = FG_NET_GUI_VERSION;
129 net->longitude = cur_fdm_state->get_Longitude();
130 net->latitude = cur_fdm_state->get_Latitude();
131 net->altitude = cur_fdm_state->get_Altitude() * SG_FEET_TO_METER;
132 net->phi = cur_fdm_state->get_Phi();
133 net->theta = cur_fdm_state->get_Theta();
134 net->psi = cur_fdm_state->get_Psi();
137 net->vcas = cur_fdm_state->get_V_calibrated_kts();
138 net->climb_rate = cur_fdm_state->get_Climb_Rate();
141 net->num_tanks = FGNetGUI::FG_MAX_TANKS;
142 for ( i = 0; i < net->num_tanks; ++i ) {
143 SGPropertyNode *node = fgGetNode("/consumables/fuel/tank", i, true);
144 net->fuel_quantity[i] = node->getDoubleValue("level-gal_us");
147 // the following really aren't used in this context
148 net->cur_time = globals->get_time_params()->get_cur_time();
149 net->warp = globals->get_warp();
152 net->tuned_freq = current_radiostack->get_navcom1()->get_nav_freq();
153 net->in_range = current_radiostack->get_navcom1()->get_nav_inrange();
155 if ( current_radiostack->get_navcom1()->get_nav_loc() ) {
158 = current_radiostack->get_navcom1()->get_nav_gs_dist_signed()
162 net->dist_nm = current_radiostack->get_navcom1()->get_nav_loc_dist()
166 net->course_deviation_deg
167 = current_radiostack->get_navcom1()->get_nav_heading()
168 - current_radiostack->get_navcom1()->get_nav_radial();
169 while ( net->course_deviation_deg > 180.0 ) {
170 net->course_deviation_deg -= 360.0;
172 while ( net->course_deviation_deg < -180.0 ) {
173 net->course_deviation_deg += 360.0;
175 if ( fabs(net->course_deviation_deg) > 90.0 )
176 net->course_deviation_deg
177 = ( net->course_deviation_deg<0.0
178 ? -net->course_deviation_deg - 180.0
179 : -net->course_deviation_deg + 180.0 );
181 if ( current_radiostack->get_navcom1()->get_nav_loc() ) {
183 net->gs_deviation_deg
184 = current_radiostack->get_navcom1()->get_nav_gs_needle_deflection()
188 net->gs_deviation_deg = -9999.0;
191 #if defined( FG_USE_NETWORK_BYTE_ORDER )
192 // Convert the net buffer to network format
193 net->version = htonl(net->version);
195 htond(net->longitude);
196 htond(net->latitude);
197 htonf(net->altitude);
202 htonf(net->climb_rate);
204 for ( i = 0; i < net->num_tanks; ++i ) {
205 htonf(net->fuel_quantity[i]);
207 net->num_tanks = htonl(net->num_tanks);
209 net->cur_time = htonl( net->cur_time );
210 net->warp = htonl( net->warp );
212 htonf(net->tuned_freq);
213 net->in_range = htonl(net->in_range);
215 htonf(net->course_deviation_deg);
216 htonf(net->gs_deviation_deg);
221 void FGNetGUI2Props( FGNetGUI *net ) {
224 #if defined( FG_USE_NETWORK_BYTE_ORDER )
225 // Convert to the net buffer from network format
226 net->version = ntohl(net->version);
228 htond(net->longitude);
229 htond(net->latitude);
230 htonf(net->altitude);
235 htonf(net->climb_rate);
237 net->num_tanks = htonl(net->num_tanks);
238 for ( i = 0; i < net->num_tanks; ++i ) {
239 htonf(net->fuel_quantity[i]);
242 net->cur_time = ntohl(net->cur_time);
243 net->warp = ntohl(net->warp);
245 htonf(net->tuned_freq);
246 net->in_range = htonl(net->in_range);
248 htonf(net->course_deviation_deg);
249 htonf(net->gs_deviation_deg);
252 if ( net->version == FG_NET_GUI_VERSION ) {
253 // cout << "pos = " << net->longitude << " " << net->latitude << endl;
254 // cout << "sea level rad = " << cur_fdm_state->get_Sea_level_radius()
256 cur_fdm_state->_updateGeodeticPosition( net->latitude,
259 * SG_METER_TO_FEET );
260 cur_fdm_state->_set_Euler_Angles( net->phi,
264 cur_fdm_state->_set_V_calibrated_kts( net->vcas );
265 cur_fdm_state->_set_Climb_Rate( net->climb_rate );
267 for (i = 0; i < net->num_tanks; ++i ) {
268 SGPropertyNode * node
269 = fgGetNode("/consumables/fuel/tank", i, true);
270 node->setDoubleValue("level-gal_us", net->fuel_quantity[i] );
273 if ( net->cur_time ) {
274 fgSetLong("/sim/time/cur-time-override", net->cur_time);
277 globals->set_warp( net->warp );
280 fgSetDouble( "/radios/nav[0]/frequencies/selected-mhz",
282 fgSetBool( "/radios/nav[0]/in-range", net->in_range );
283 fgSetDouble( "/radios/dme/distance-nm", net->dist_nm );
284 fgSetDouble( "/radios/nav[0]/heading-needle-deflection",
285 net->course_deviation_deg );
286 fgSetDouble( "/radios/nav[0]/gs-needle-deflection",
287 net->gs_deviation_deg );
289 SG_LOG( SG_IO, SG_ALERT,
290 "Error: version mismatch in FGNetNativeGUI2Props()" );
291 SG_LOG( SG_IO, SG_ALERT,
292 "\tread " << net->version << " need " << FG_NET_GUI_VERSION );
293 SG_LOG( SG_IO, SG_ALERT,
294 "\tNeed to upgrade net_fdm.hxx and recompile." );
299 // process work for this port
300 bool FGNativeGUI::process() {
301 SGIOChannel *io = get_io_channel();
302 int length = sizeof(buf);
304 if ( get_direction() == SG_IO_OUT ) {
305 // cout << "size of cur_fdm_state = " << length << endl;
306 FGProps2NetGUI( &buf );
307 if ( ! io->write( (char *)(& buf), length ) ) {
308 SG_LOG( SG_IO, SG_ALERT, "Error writing data." );
311 } else if ( get_direction() == SG_IO_IN ) {
312 if ( io->get_type() == sgFileType ) {
313 if ( io->read( (char *)(& buf), length ) == length ) {
314 SG_LOG( SG_IO, SG_DEBUG, "Success reading data." );
315 FGNetGUI2Props( &buf );
318 while ( io->read( (char *)(& buf), length ) == length ) {
319 SG_LOG( SG_IO, SG_DEBUG, "Success reading data." );
320 FGNetGUI2Props( &buf );
330 bool FGNativeGUI::close() {
331 SGIOChannel *io = get_io_channel();
333 set_enabled( false );
335 if ( ! io->close() ) {