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flightgear/src/Main/main.cxx
James Turner d2962ffb2d Reset: refactor static CameraGroup ownership
2013-11-16 13:02:47 +00:00

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// main.cxx -- top level sim routines
//
// Written by Curtis Olson, started May 1997.
//
// Copyright (C) 1997 - 2002 Curtis L. Olson - http://www.flightgear.org/~curt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <simgear/compiler.h>
#include <iostream>
#include <osg/Camera>
#include <osg/GraphicsContext>
#include <osgDB/Registry>
// Class references
#include <simgear/canvas/VGInitOperation.hxx>
#include <simgear/scene/model/modellib.hxx>
#include <simgear/scene/material/matlib.hxx>
#include <simgear/props/AtomicChangeListener.hxx>
#include <simgear/props/props.hxx>
#include <simgear/timing/sg_time.hxx>
#include <simgear/io/raw_socket.hxx>
#include <simgear/scene/tsync/terrasync.hxx>
#include <simgear/math/SGMath.hxx>
#include <simgear/math/sg_random.h>
#include <Model/panelnode.hxx>
#include <Scenery/scenery.hxx>
#include <Scenery/tilemgr.hxx>
#include <Sound/soundmanager.hxx>
#include <Time/TimeManager.hxx>
#include <GUI/gui.h>
#include <Viewer/splash.hxx>
#include <Viewer/renderer.hxx>
#include <Viewer/WindowSystemAdapter.hxx>
#include <Navaids/NavDataCache.hxx>
#include "fg_commands.hxx"
#include "fg_io.hxx"
#include "main.hxx"
#include "util.hxx"
#include "fg_init.hxx"
#include "fg_os.hxx"
#include "fg_props.hxx"
#include "positioninit.hxx"
#include "subsystemFactory.hxx"
#include "options.hxx"
using namespace flightgear;
using std::cerr;
using std::vector;
// The atexit() function handler should know when the graphical subsystem
// is initialized.
extern int _bootstrap_OSInit;
static SGPropertyNode_ptr frame_signal;
static TimeManager* timeMgr;
// What should we do when we have nothing else to do? Let's get ready
// for the next move and update the display?
static void fgMainLoop( void )
{
frame_signal->fireValueChanged();
// compute simulated time (allowing for pause, warp, etc) and
// real elapsed time
double sim_dt, real_dt;
timeMgr->computeTimeDeltas(sim_dt, real_dt);
// update all subsystems
globals->get_subsystem_mgr()->update(sim_dt);
simgear::AtomicChangeListener::fireChangeListeners();
}
static void initTerrasync()
{
if (fgGetBool("/sim/fghome-readonly", false)) {
return;
}
// start TerraSync up now, so it can be synchronizing shared models
// and airports data in parallel with a nav-cache rebuild.
SGPath tsyncCache(globals->get_fg_home());
tsyncCache.append("terrasync-cache.xml");
// wipe the cache file if requested
if (flightgear::Options::sharedInstance()->isOptionSet("restore-defaults")) {
SG_LOG(SG_GENERAL, SG_INFO, "restore-defaults requested, wiping terrasync update cache at " <<
tsyncCache);
if (tsyncCache.exists()) {
tsyncCache.remove();
}
}
fgSetString("/sim/terrasync/cache-path", tsyncCache.c_str());
simgear::SGTerraSync* terra_sync = new simgear::SGTerraSync();
terra_sync->setRoot(globals->get_props());
globals->add_subsystem("terrasync", terra_sync);
terra_sync->bind();
terra_sync->init();
// add the terrasync root as a data path so data can be retrieved from it
std::string terraSyncDir(fgGetString("/sim/terrasync/scenery-dir"));
globals->append_data_path(terraSyncDir);
}
static void registerMainLoop()
{
// stash current frame signal property
frame_signal = fgGetNode("/sim/signals/frame", true);
timeMgr = (TimeManager*) globals->get_subsystem("time");
fgRegisterIdleHandler( fgMainLoop );
}
// This is the top level master main function that is registered as
// our idle function
// The first few passes take care of initialization things (a couple
// per pass) and once everything has been initialized fgMainLoop from
// then on.
static void fgIdleFunction ( void ) {
// Specify our current idle function state. This is used to run all
// our initializations out of the idle callback so that we can get a
// splash screen up and running right away.
static int idle_state = 0;
if ( idle_state == 0 ) {
if (guiInit())
{
idle_state+=2;
fgSplashProgress("loading-aircraft-list");
}
} else if ( idle_state == 2 ) {
initTerrasync();
idle_state++;
fgSplashProgress("loading-nav-dat");
} else if ( idle_state == 3 ) {
bool done = fgInitNav();
if (done) {
++idle_state;
fgSplashProgress("init-scenery");
} else {
fgSplashProgress("loading-nav-dat");
}
} else if ( idle_state == 4 ) {
idle_state+=2;
// based on the requested presets, calculate the true starting
// lon, lat
flightgear::initPosition();
flightgear::initTowerLocationListener();
TimeManager* t = new TimeManager;
globals->add_subsystem("time", t, SGSubsystemMgr::INIT);
t->init(); // need to init now, not during initSubsystems
// Do some quick general initializations
if( !fgInitGeneral()) {
throw sg_exception("General initialization failed");
}
////////////////////////////////////////////////////////////////////
// Initialize the property-based built-in commands
////////////////////////////////////////////////////////////////////
fgInitCommands();
flightgear::registerSubsystemCommands(globals->get_commands());
////////////////////////////////////////////////////////////////////
// Initialize the material manager
////////////////////////////////////////////////////////////////////
globals->set_matlib( new SGMaterialLib );
simgear::SGModelLib::init(globals->get_fg_root(), globals->get_props());
simgear::SGModelLib::setPanelFunc(FGPanelNode::load);
////////////////////////////////////////////////////////////////////
// Initialize the TG scenery subsystem.
////////////////////////////////////////////////////////////////////
globals->set_scenery( new FGScenery );
globals->get_scenery()->init();
globals->get_scenery()->bind();
globals->set_tile_mgr( new FGTileMgr );
fgSplashProgress("loading-aircraft");
} else if ( idle_state == 6 ) {
idle_state++;
fgSplashProgress("creating-subsystems");
} else if ( idle_state == 7 ) {
idle_state++;
SGTimeStamp st;
st.stamp();
fgCreateSubsystems();
SG_LOG(SG_GENERAL, SG_INFO, "Creating subsystems took:" << st.elapsedMSec());
fgSplashProgress("binding-subsystems");
} else if ( idle_state == 8 ) {
idle_state++;
SGTimeStamp st;
st.stamp();
globals->get_subsystem_mgr()->bind();
SG_LOG(SG_GENERAL, SG_INFO, "Binding subsystems took:" << st.elapsedMSec());
fgSplashProgress("init-subsystems");
} else if ( idle_state == 9 ) {
SGSubsystem::InitStatus status = globals->get_subsystem_mgr()->incrementalInit();
if ( status == SGSubsystem::INIT_DONE) {
++idle_state;
fgSplashProgress("finishing-subsystems");
} else {
fgSplashProgress("init-subsystems");
}
} else if ( idle_state == 10 ) {
idle_state = 900;
fgPostInitSubsystems();
fgSplashProgress("finalize-position");
} else if ( idle_state == 900 ) {
idle_state = 1000;
// setup OpenGL view parameters
globals->get_renderer()->setupView();
globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
fgGetInt("/sim/startup/ysize") );
WindowSystemAdapter::getWSA()->windows[0]->gc->add(
new simgear::canvas::VGInitOperation()
);
int session = fgGetInt("/sim/session",0);
session++;
fgSetInt("/sim/session",session);
}
if ( idle_state == 1000 ) {
// We've finished all our initialization steps, from now on we
// run the main loop.
fgSetBool("sim/sceneryloaded", false);
registerMainLoop();
}
}
static void upper_case_property(const char *name)
{
using namespace simgear;
SGPropertyNode *p = fgGetNode(name, false);
if (!p) {
p = fgGetNode(name, true);
p->setStringValue("");
} else {
props::Type t = p->getType();
if (t == props::NONE || t == props::UNSPECIFIED)
p->setStringValue("");
else
assert(t == props::STRING);
}
p->addChangeListener(new FGMakeUpperCase);
}
// see http://code.google.com/p/flightgear-bugs/issues/detail?id=385
// for the details of this.
static void ATIScreenSizeHack()
{
osg::ref_ptr<osg::Camera> hackCam = new osg::Camera;
hackCam->setRenderOrder(osg::Camera::PRE_RENDER);
int prettyMuchAnyInt = 1;
hackCam->setViewport(0, 0, prettyMuchAnyInt, prettyMuchAnyInt);
globals->get_renderer()->addCamera(hackCam, false);
}
// Propose NVIDIA Optimus to use high-end GPU
#if defined(SG_WINDOWS)
extern "C" {
_declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
}
#endif
static void logToFile()
{
SGPath logPath = globals->get_fg_home();
logPath.append("fgfs.log");
if (logPath.exists()) {
SGPath prevLogPath = globals->get_fg_home();
prevLogPath.append("fgfs_0.log");
logPath.rename(prevLogPath);
// bit strange, we need to restore the correct value of logPath now
logPath = globals->get_fg_home();
logPath.append("fgfs.log");
}
sglog().logToFile(logPath, SG_ALL, SG_INFO);
}
// Main top level initialization
int fgMainInit( int argc, char **argv ) {
// set default log levels
sglog().setLogLevels( SG_ALL, SG_ALERT );
globals = new FGGlobals;
if (!fgInitHome()) {
return EXIT_FAILURE;
}
if (!fgGetBool("/sim/fghome-readonly")) {
// now home is initialised, we can log to a file inside it
logToFile();
}
std::string version;
#ifdef FLIGHTGEAR_VERSION
version = FLIGHTGEAR_VERSION;
#else
version = "unknown version";
#endif
SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
<< version );
SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << std::endl );
// Allocate global data structures. This needs to happen before
// we parse command line options
// seed the random number generator
sg_srandom_time();
string_list *col = new string_list;
globals->set_channel_options_list( col );
fgValidatePath("", false); // initialize static variables
upper_case_property("/sim/presets/airport-id");
upper_case_property("/sim/presets/runway");
upper_case_property("/sim/tower/airport-id");
upper_case_property("/autopilot/route-manager/input");
// Load the configuration parameters. (Command line options
// override config file options. Config file options override
// defaults.)
int configResult = fgInitConfig(argc, argv);
if (configResult == flightgear::FG_OPTIONS_ERROR) {
return EXIT_FAILURE;
} else if (configResult == flightgear::FG_OPTIONS_EXIT) {
return EXIT_SUCCESS;
}
// Initialize the Window/Graphics environment.
fgOSInit(&argc, argv);
_bootstrap_OSInit++;
fgRegisterIdleHandler( &fgIdleFunction );
// Initialize sockets (WinSock needs this)
simgear::Socket::initSockets();
// Clouds3D requires an alpha channel
fgOSOpenWindow(true /* request stencil buffer */);
fgOSResetProperties();
// Initialize the splash screen right away
fntInit();
fgSplashInit();
if (fgGetBool("/sim/ati-viewport-hack", true)) {
SG_LOG(SG_GENERAL, SG_ALERT, "Enabling ATI viewport hack");
ATIScreenSizeHack();
}
fgOutputSettings();
// pass control off to the master event handler
int result = fgOSMainLoop();
frame_signal.clear();
fgOSCloseWindow();
// clean up here; ensure we null globals to avoid
// confusing the atexit() handler
delete globals;
globals = NULL;
// delete the NavCache here. This will cause the destruction of many cached
// objects (eg, airports, navaids, runways).
delete flightgear::NavDataCache::instance();
return result;
}
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