+ static bool smgr_init = true;
+ static SGPropertyNode *sound_working = fgGetNode("/sim/sound/working");
+ if (smgr_init == true) {
+ if (sound_working->getBoolValue() == true) {
+ fgInitSoundManager();
+ smgr_init = false;
+ }
+ } else {
+ static SGPropertyNode *sound_enabled = fgGetNode("/sim/sound/enabled");
+ static SGSoundMgr *smgr = globals->get_soundmgr();
+ static bool smgr_enabled = true;
+
+ if (sound_working->getBoolValue() == false) { // request to reinit
+ smgr->reinit();
+ smgr->resume();
+ sound_working->setBoolValue(true);
+ }
+
+ if (smgr_enabled != sound_enabled->getBoolValue()) {
+ if (smgr_enabled == true) { // request to suspend
+ smgr->suspend();
+ smgr_enabled = false;
+ } else {
+ smgr->resume();
+ smgr_enabled = true;
+ }
+ }
+
+ if (smgr_enabled == true) {
+ static SGPropertyNode *volume = fgGetNode("/sim/sound/volume");
+ smgr->set_volume(volume->getFloatValue());
+ smgr->update(delta_time_sec);
+ }
+ }