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flightgear/Simulator/Main/GLUTmain.cxx

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// GLUTmain.cxx -- top level sim routines
//
// Written by Curtis Olson for OpenGL, started May 1997.
//
// Copyright (C) 1997 Curtis L. Olson - curt@me.umn.edu
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$
#define MICHAEL_JOHNSON_EXPERIMENTAL_ENGINE_AUDIO
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef FG_MATH_EXCEPTION_CLASH
# include <math.h>
#endif
#ifdef HAVE_WINDOWS_H
# include <windows.h>
# include <float.h>
#endif
#include <GL/glut.h>
#include <XGL/xgl.h>
#include <stdio.h>
#include <string.h>
#include <string>
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h> /* for stat() */
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h> /* for stat() */
#endif
#include <Include/fg_constants.h> // for VERSION
#include <Include/general.hxx>
#include <Debug/logstream.hxx>
#include <Aircraft/aircraft.hxx>
#include <Astro/sky.hxx>
#include <Astro/stars.hxx>
#include <Astro/solarsystem.hxx>
#ifdef ENABLE_AUDIO_SUPPORT
# include <plib/sl.h>
# include <plib/sm.h>
#endif
#include <Autopilot/autopilot.hxx>
#include <Cockpit/cockpit.hxx>
#include <GUI/gui.h>
#include <Joystick/joystick.hxx>
#include <Math/fg_geodesy.hxx>
#include <Math/mat3.h>
#include <Math/polar3d.hxx>
#include <Math/fg_random.h>
#include <Misc/fgpath.hxx>
#include <plib/pu.h>
#include <Scenery/scenery.hxx>
#include <Scenery/tilemgr.hxx>
#include <Time/event.hxx>
#include <Time/fg_time.hxx>
#include <Time/fg_timer.hxx>
#include <Time/sunpos.hxx>
#include <Weather/weather.hxx>
#include "GLUTkey.hxx"
#include "fg_init.hxx"
#include "options.hxx"
#include "splash.hxx"
#include "views.hxx"
#include "fg_serial.hxx"
// -dw- use custom sioux settings so I can see output window
#ifdef MACOS
# ifndef FG_NDEBUG
# include <sioux.h> // settings for output window
# endif
#endif
// This is a record containing a bit of global housekeeping information
FGGeneral general;
// Specify our current idle function state. This is used to run all
// our initializations out of the glutIdleLoop() so that we can get a
// splash screen up and running right away.
static int idle_state = 0;
// Another hack
int use_signals = 0;
// Global structures for the Audio library
#ifdef ENABLE_AUDIO_SUPPORT
slEnvelope pitch_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
slEnvelope volume_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
slScheduler *audio_sched;
smMixer *audio_mixer;
slSample *s1;
slSample *s2;
#endif
// The following defines flight gear options. Because glutlib will also
// want to parse its own options, those options must not be included here
// or they will get parsed by the main program option parser. Hence case
// is significant for any option added that might be in conflict with
// glutlib's parser.
//
// glutlib parses for:
// -display
// -direct (invalid in Win32)
// -geometry
// -gldebug
// -iconized
// -indirect (invalid in Win32)
// -synce
//
// Note that glutlib depends upon strings while this program's
// option parser wants only initial characters followed by numbers
// or pathnames.
//
// fgInitVisuals() -- Initialize various GL/view parameters
static void fgInitVisuals( void ) {
fgLIGHT *l;
l = &cur_light_params;
#ifndef GLUT_WRONG_VERSION
// Go full screen if requested ...
if ( current_options.get_fullscreen() ) {
glutFullScreen();
}
#endif
// If enabled, normal vectors specified with glNormal are scaled
// to unit length after transformation. See glNormal.
// xglEnable( GL_NORMALIZE );
xglEnable( GL_LIGHTING );
xglEnable( GL_LIGHT0 );
xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
// xglFogi (GL_FOG_MODE, GL_LINEAR);
xglFogi (GL_FOG_MODE, GL_EXP2);
// Fog density is now set when the weather system is initialized
// xglFogf (GL_FOG_DENSITY, w->fog_density);
if ( (current_options.get_fog() == 1) ||
(current_options.get_shading() == 0) ) {
// if fastest fog requested, or if flat shading force fastest
xglHint ( GL_FOG_HINT, GL_FASTEST );
} else if ( current_options.get_fog() == 2 ) {
xglHint ( GL_FOG_HINT, GL_NICEST );
}
if ( current_options.get_wireframe() ) {
// draw wire frame
xglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
}
// This is the default anyways, but it can't hurt
xglFrontFace ( GL_CCW );
// Just testing ...
// xglEnable(GL_POINT_SMOOTH);
// xglEnable(GL_LINE_SMOOTH);
// xglEnable(GL_POLYGON_SMOOTH);
}
#if 0
// Draw a basic instrument panel
static void fgUpdateInstrViewParams( void ) {
exit(0);
fgVIEW *v = &current_view;
xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) / 2);
xglMatrixMode(GL_PROJECTION);
xglPushMatrix();
xglLoadIdentity();
gluOrtho2D(0, 640, 0, 480);
xglMatrixMode(GL_MODELVIEW);
xglPushMatrix();
xglLoadIdentity();
xglColor3f(1.0, 1.0, 1.0);
xglIndexi(7);
xglDisable(GL_DEPTH_TEST);
xglDisable(GL_LIGHTING);
xglLineWidth(1);
xglColor3f (0.5, 0.5, 0.5);
xglBegin(GL_QUADS);
xglVertex2f(0.0, 0.00);
xglVertex2f(0.0, 480.0);
xglVertex2f(640.0,480.0);
xglVertex2f(640.0, 0.0);
xglEnd();
xglRectf(0.0,0.0, 640, 480);
xglEnable(GL_DEPTH_TEST);
xglEnable(GL_LIGHTING);
xglMatrixMode(GL_PROJECTION);
xglPopMatrix();
xglMatrixMode(GL_MODELVIEW);
xglPopMatrix();
}
#endif
// Update all Visuals (redraws anything graphics related)
static void fgRenderFrame( void ) {
fgLIGHT *l = &cur_light_params;
FGTime *t = FGTime::cur_time_params;
FGView *v = &current_view;
double angle;
// GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
GLbitfield clear_mask;
if ( idle_state != 1000 ) {
// still initializing, draw the splash screen
if ( current_options.get_splash_screen() == 1 ) {
fgSplashUpdate(0.0);
}
} else {
// idle_state is now 1000 meaning we've finished all our
// initializations and are running the main loop, so this will
// now work without seg faulting the system.
// printf("Ground = %.2f Altitude = %.2f\n", scenery.cur_elev,
// FG_Altitude * FEET_TO_METER);
// this is just a temporary hack, to make me understand Pui
// timerText -> setLabel (ctime (&t->cur_time));
// end of hack
// update view volume parameters
v->UpdateViewParams();
// set the sun position
xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
clear_mask = GL_DEPTH_BUFFER_BIT;
if ( current_options.get_wireframe() ) {
clear_mask |= GL_COLOR_BUFFER_BIT;
}
if ( current_options.get_panel_status() ) {
// we can't clear the screen when the panel is active
} else if ( current_options.get_skyblend() ) {
if ( current_options.get_textures() ) {
// glClearColor(black[0], black[1], black[2], black[3]);
glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
l->adj_fog_color[2], l->adj_fog_color[3]);
clear_mask |= GL_COLOR_BUFFER_BIT;
}
} else {
glClearColor(l->sky_color[0], l->sky_color[1],
l->sky_color[2], l->sky_color[3]);
clear_mask |= GL_COLOR_BUFFER_BIT;
}
xglClear( clear_mask );
// Tell GL we are switching to model view parameters
xglMatrixMode(GL_MODELVIEW);
// xglLoadIdentity();
// draw sky
xglDisable( GL_DEPTH_TEST );
xglDisable( GL_LIGHTING );
xglDisable( GL_CULL_FACE );
xglDisable( GL_FOG );
xglShadeModel( GL_SMOOTH );
if ( current_options.get_skyblend() ) {
fgSkyRender();
}
// setup transformation for drawing astronomical objects
xglPushMatrix();
// Translate to view position
Point3D view_pos = v->get_view_pos();
xglTranslatef( view_pos.x(), view_pos.y(), view_pos.z() );
// Rotate based on gst (sidereal time)
// note: constant should be 15.041085, Curt thought it was 15
angle = t->getGst() * 15.041085;
// printf("Rotating astro objects by %.2f degrees\n",angle);
xglRotatef( angle, 0.0, 0.0, -1.0 );
// draw stars and planets
fgStarsRender();
//xglEnable(GL_DEPTH_TEST);
SolarSystem::theSolarSystem->draw();
xglPopMatrix();
// draw scenery
if ( current_options.get_shading() ) {
xglShadeModel( GL_SMOOTH );
} else {
xglShadeModel( GL_FLAT );
}
xglEnable( GL_DEPTH_TEST );
if ( current_options.get_fog() > 0 ) {
xglEnable( GL_FOG );
xglFogfv (GL_FOG_COLOR, l->adj_fog_color);
}
// set lighting parameters
xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
if ( current_options.get_textures() ) {
// texture parameters
xglEnable( GL_TEXTURE_2D );
xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
// set base color (I don't think this is doing anything here)
xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
} else {
xglDisable( GL_TEXTURE_2D );
xglMaterialfv (GL_FRONT, GL_AMBIENT, terrain_color);
xglMaterialfv (GL_FRONT, GL_DIFFUSE, terrain_color);
// xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
// xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
}
fgTileMgrRender();
xglDisable( GL_TEXTURE_2D );
xglDisable( GL_FOG );
// display HUD && Panel
fgCockpitUpdate();
// We can do translucent menus, so why not. :-)
xglEnable ( GL_BLEND ) ;
xglBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
puDisplay();
xglDisable ( GL_BLEND ) ;
xglEnable( GL_FOG );
}
xglutSwapBuffers();
}
// Update internal time dependent calculations (i.e. flight model)
void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
FGInterface *f = current_aircraft.fdm_state;
fgLIGHT *l = &cur_light_params;
FGTime *t = FGTime::cur_time_params;
FGView *v = &current_view;
int i;
// update the flight model
if ( multi_loop < 0 ) {
multi_loop = DEFAULT_MULTILOOP;
}
if ( !t->getPause() ) {
// run Autopilot system
fgAPRun();
// printf("updating flight model x %d\n", multi_loop);
fgFDMUpdate( current_options.get_flight_model(),
cur_fdm_state, multi_loop, remainder );
} else {
fgFDMUpdate( current_options.get_flight_model(),
cur_fdm_state, 0, remainder );
}
// update the view angle
for ( i = 0; i < multi_loop; i++ ) {
if ( fabs(v->get_goal_view_offset() - v->get_view_offset()) < 0.05 ) {
v->set_view_offset( v->get_goal_view_offset() );
break;
} else {
// move v->view_offset towards v->goal_view_offset
if ( v->get_goal_view_offset() > v->get_view_offset() ) {
if ( v->get_goal_view_offset() - v->get_view_offset() < FG_PI ){
v->inc_view_offset( 0.01 );
} else {
v->inc_view_offset( -0.01 );
}
} else {
if ( v->get_view_offset() - v->get_goal_view_offset() < FG_PI ){
v->inc_view_offset( -0.01 );
} else {
v->inc_view_offset( 0.01 );
}
}
if ( v->get_view_offset() > FG_2PI ) {
v->inc_view_offset( -FG_2PI );
} else if ( v->get_view_offset() < 0 ) {
v->inc_view_offset( FG_2PI );
}
}
}
double tmp = -(l->sun_rotation + FG_PI)
- (f->get_Psi() - v->get_view_offset() );
while ( tmp < 0.0 ) {
tmp += FG_2PI;
}
while ( tmp > FG_2PI ) {
tmp -= FG_2PI;
}
/* printf("Psi = %.2f, viewoffset = %.2f sunrot = %.2f rottosun = %.2f\n",
FG_Psi * RAD_TO_DEG, v->view_offset * RAD_TO_DEG,
-(l->sun_rotation+FG_PI) * RAD_TO_DEG, tmp * RAD_TO_DEG); */
l->UpdateAdjFog();
}
void fgInitTimeDepCalcs( void ) {
// initialize timer
// #ifdef HAVE_SETITIMER
// fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
// #endif HAVE_SETITIMER
}
static const double alt_adjust_ft = 3.758099;
static const double alt_adjust_m = alt_adjust_ft * FEET_TO_METER;
// 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 ) {
FGInterface *f;
FGTime *t;
static long remainder = 0;
long elapsed, multi_loop;
#ifdef FANCY_FRAME_COUNTER
int i;
double accum;
#else
static time_t last_time = 0;
static int frames = 0;
#endif // FANCY_FRAME_COUNTER
f = current_aircraft.fdm_state;
t = FGTime::cur_time_params;
FG_LOG( FG_ALL, FG_DEBUG, "Running Main Loop");
FG_LOG( FG_ALL, FG_DEBUG, "======= ==== ====");
#if defined( ENABLE_LINUX_JOYSTICK )
// Read joystick and update control settings
fgJoystickRead();
#elif defined( ENABLE_GLUT_JOYSTICK )
// Glut joystick support works by feeding a joystick handler
// function to glut. This is taken care of once in the joystick
// init routine and we don't have to worry about it again.
#endif
current_weather.Update();
// Fix elevation. I'm just sticking this here for now, it should
// probably move eventually
/* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
scenery.cur_elev,
f->get_Runway_altitude() * FEET_TO_METER,
f->get_Altitude() * FEET_TO_METER); */
if ( scenery.cur_elev > -9990 ) {
if ( f->get_Altitude() * FEET_TO_METER <
(scenery.cur_elev + alt_adjust_m - 3.0) ) {
// now set aircraft altitude above ground
printf("Current Altitude = %.2f < %.2f forcing to %.2f\n",
f->get_Altitude() * FEET_TO_METER,
scenery.cur_elev + alt_adjust_m - 3.0,
scenery.cur_elev + alt_adjust_m );
fgFDMForceAltitude( current_options.get_flight_model(),
scenery.cur_elev + alt_adjust_m );
FG_LOG( FG_ALL, FG_DEBUG,
"<*> resetting altitude to "
<< f->get_Altitude() * FEET_TO_METER << " meters" );
}
fgFDMSetGroundElevation( current_options.get_flight_model(),
scenery.cur_elev ); // meters
}
/* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
scenery.cur_elev,
f->get_Runway_altitude() * FEET_TO_METER,
f->get_Altitude() * FEET_TO_METER); */
// update "time"
t->update(f);
// Get elapsed time (in usec) for this past frame
elapsed = fgGetTimeInterval();
FG_LOG( FG_ALL, FG_DEBUG,
"Elapsed time interval is = " << elapsed
<< ", previous remainder is = " << remainder );
// Calculate frame rate average
#ifdef FANCY_FRAME_COUNTER
/* old fps calculation */
if ( elapsed > 0 ) {
double tmp;
accum = 0.0;
for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
tmp = general.get_frame(i);
accum += tmp;
// printf("frame[%d] = %.2f\n", i, g->frames[i]);
general.set_frame(i+1,tmp);
}
tmp = 1000000.0 / (float)elapsed;
general.set_frame(0,tmp);
// printf("frame[0] = %.2f\n", general.frames[0]);
accum += tmp;
general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
// printf("ave = %.2f\n", general.frame_rate);
}
#else
if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
general.set_frame_rate( frames );
FG_LOG( FG_ALL, FG_DEBUG,
"--> Frame rate is = " << general.get_frame_rate() );
frames = 0;
}
last_time = t->get_cur_time();
++frames;
#endif
// Run flight model
if ( ! use_signals ) {
// Calculate model iterations needed for next frame
elapsed += remainder;
multi_loop = (int)(((double)elapsed * 0.000001) * DEFAULT_MODEL_HZ);
remainder = elapsed - ((multi_loop*1000000) / DEFAULT_MODEL_HZ);
FG_LOG( FG_ALL, FG_DEBUG,
"Model iterations needed = " << multi_loop
<< ", new remainder = " << remainder );
// flight model
if ( multi_loop > 0 ) {
fgUpdateTimeDepCalcs(multi_loop, remainder);
} else {
FG_LOG( FG_ALL, FG_INFO, "Elapsed time is zero ... we're zinging" );
}
}
#if ! defined( MACOS )
// Do any serial port work that might need to be done
fgSerialProcess();
#endif
// see if we need to load any new scenery tiles
fgTileMgrUpdate();
// Process/manage pending events
global_events.Process();
// Run audio scheduler
#ifdef ENABLE_AUDIO_SUPPORT
if ( current_options.get_sound() && !audio_sched->not_working() ) {
# ifdef MICHAEL_JOHNSON_EXPERIMENTAL_ENGINE_AUDIO
// note: all these factors are relative to the sample. our
// sample format should really contain a conversion factor so
// that we can get prop speed right for arbitrary samples.
// Note that for normal-size props, there is a point at which
// the prop tips approach the speed of sound; that is a pretty
// strong limit to how fast the prop can go.
// multiplication factor is prime pitch control; add some log
// component for verisimilitude
double pitch = log((controls.get_throttle(0) * 14.0) + 1.0);
//fprintf(stderr, "pitch1: %f ", pitch);
if (controls.get_throttle(0) > 0.0 || f->v_rel_wind > 40.0) {
//fprintf(stderr, "rel_wind: %f ", f->v_rel_wind);
// only add relative wind and AoA if prop is moving
// or we're really flying at idle throttle
if (pitch < 5.4) { // this needs tuning
// prop tips not breaking sound barrier
pitch += log(f->v_rel_wind + 0.8)/2;
} else {
// prop tips breaking sound barrier
pitch += log(f->v_rel_wind + 0.8)/10;
}
//fprintf(stderr, "pitch2: %f ", pitch);
//fprintf(stderr, "AoA: %f ", FG_Gamma_vert_rad);
// Angle of Attack next... -x^3(e^x) is my best guess Just
// need to calculate some reasonable scaling factor and
// then clamp it on the positive aoa (neg adj) side
double aoa = f->get_Gamma_vert_rad() * 2.2;
double tmp = 3.0;
double aoa_adj = pow(-aoa, tmp) * pow(M_E, aoa);
if (aoa_adj < -0.8) aoa_adj = -0.8;
pitch += aoa_adj;
//fprintf(stderr, "pitch3: %f ", pitch);
// don't run at absurdly slow rates -- not realistic
// and sounds bad to boot. :-)
if (pitch < 0.8) pitch = 0.8;
}
//fprintf(stderr, "pitch4: %f\n", pitch);
double volume = controls.get_throttle(0) * 1.15 + 0.3 +
log(f->v_rel_wind + 1.0)/14.0;
// fprintf(stderr, "volume: %f\n", volume);
pitch_envelope.setStep ( 0, 0.01, pitch );
volume_envelope.setStep ( 0, 0.01, volume );
# else
double param = controls.get_throttle( 0 ) * 2.0 + 1.0;
pitch_envelope.setStep ( 0, 0.01, param );
volume_envelope.setStep ( 0, 0.01, param );
# endif // experimental throttle patch
audio_sched -> update();
}
#endif
// redraw display
fgRenderFrame();
FG_LOG( FG_ALL, FG_DEBUG, "" );
}
// This is the top level master main function that is registered as
// our idle funciton
//
// 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 ) {
// printf("idle state == %d\n", idle_state);
if ( idle_state == 0 ) {
// Initialize the splash screen right away
if ( current_options.get_splash_screen() ) {
fgSplashInit();
}
idle_state++;
} else if ( idle_state == 1 ) {
// Start the intro music
#if !defined(WIN32)
if ( current_options.get_intro_music() ) {
string lockfile = "/tmp/mpg123.running";
FGPath mp3file( current_options.get_fg_root() );
mp3file.append( "Sounds/intro.mp3" );
string command = "(touch " + lockfile + "; mpg123 "
+ mp3file.str() + "> /dev/null 2>&1; /bin/rm "
+ lockfile + ") &";
FG_LOG( FG_GENERAL, FG_INFO,
"Starting intro music: " << mp3file.str() );
system ( command.c_str() );
}
#endif
idle_state++;
} else if ( idle_state == 2 ) {
// These are a few miscellaneous things that aren't really
// "subsystems" but still need to be initialized.
#ifdef USE_GLIDE
if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
}
#endif
idle_state++;
} else if ( idle_state == 3 ) {
// This is the top level init routine which calls all the
// other subsystem initialization routines. If you are adding
// a subsystem to flight gear, its initialization call should
// located in this routine.
if( !fgInitSubsystems()) {
FG_LOG( FG_GENERAL, FG_ALERT,
"Subsystem initializations failed ..." );
exit(-1);
}
idle_state++;
} else if ( idle_state == 4 ) {
// setup OpenGL view parameters
fgInitVisuals();
if ( use_signals ) {
// init timer routines, signals, etc. Arrange for an alarm
// signal to be generated, etc.
fgInitTimeDepCalcs();
}
idle_state++;
} else if ( idle_state == 5 ) {
idle_state++;
} else if ( idle_state == 6 ) {
// Initialize audio support
#ifdef ENABLE_AUDIO_SUPPORT
#if !defined(WIN32)
if ( current_options.get_intro_music() ) {
// Let's wait for mpg123 to finish
string lockfile = "/tmp/mpg123.running";
struct stat stat_buf;
FG_LOG( FG_GENERAL, FG_INFO,
"Waiting for mpg123 player to finish ..." );
while ( stat(lockfile.c_str(), &stat_buf) == 0 ) {
// file exist, wait ...
sleep(1);
FG_LOG( FG_GENERAL, FG_INFO, ".");
}
FG_LOG( FG_GENERAL, FG_INFO, "");
}
#endif // WIN32
audio_sched = new slScheduler ( 8000 );
audio_mixer = new smMixer;
audio_mixer -> setMasterVolume ( 80 ) ; /* 80% of max volume. */
audio_sched -> setSafetyMargin ( 1.0 ) ;
FGPath slfile( current_options.get_fg_root() );
slfile.append( "Sounds/wasp.wav" );
s1 = new slSample ( (char *)slfile.c_str() );
FG_LOG( FG_GENERAL, FG_INFO,
"Rate = " << s1 -> getRate()
<< " Bps = " << s1 -> getBps()
<< " Stereo = " << s1 -> getStereo() );
audio_sched -> loopSample ( s1 );
if ( audio_sched->not_working() ) {
// skip
} else {
pitch_envelope.setStep ( 0, 0.01, 0.6 );
volume_envelope.setStep ( 0, 0.01, 0.6 );
audio_sched -> addSampleEnvelope( s1, 0, 0, &
pitch_envelope,
SL_PITCH_ENVELOPE );
audio_sched -> addSampleEnvelope( s1, 0, 1,
&volume_envelope,
SL_VOLUME_ENVELOPE );
}
// strcpy(slfile, path);
// strcat(slfile, "thunder.wav");
// s2 -> loadFile ( slfile );
// s2 -> adjustVolume(0.5);
// audio_sched -> playSample ( s2 );
#endif
// sleep(1);
idle_state = 1000;
}
if ( idle_state == 1000 ) {
// We've finished all our initialization steps, from now on we
// run the main loop.
fgMainLoop();
} else {
if ( current_options.get_splash_screen() == 1 ) {
fgSplashUpdate(0.0);
}
}
}
// options.cxx needs to see this for toggle_panel()
// Handle new window size or exposure
void fgReshape( int width, int height ) {
// Do this so we can call fgReshape(0,0) ourselves without having
// to know what the values of width & height are.
if ( (height > 0) && (width > 0) ) {
if ( ! current_options.get_panel_status() ) {
current_view.set_win_ratio( (GLfloat) width / (GLfloat) height );
} else {
current_view.set_win_ratio( (GLfloat) width /
((GLfloat) (height)*0.4232) );
}
}
current_view.set_winWidth( width );
current_view.set_winHeight( height );
current_view.force_update_fov_math();
// Inform gl of our view window size (now handled elsewhere)
// xglViewport(0, 0, (GLint)width, (GLint)height);
if ( idle_state == 1000 ) {
// yes we've finished all our initializations and are running
// the main loop, so this will now work without seg faulting
// the system.
current_view.UpdateViewParams();
if ( current_options.get_panel_status() ) {
FGPanel::OurPanel->ReInit(0, 0, 1024, 768);
}
}
}
// Initialize GLUT and define a main window
int fgGlutInit( int *argc, char **argv ) {
// GLUT will extract all glut specific options so later on we only
// need wory about our own.
xglutInit(argc, argv);
// Define Display Parameters
xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
FG_LOG( FG_GENERAL, FG_INFO, "Opening a window: " <<
current_options.get_xsize() << "x" << current_options.get_ysize() );
// Define initial window size
xglutInitWindowSize( current_options.get_xsize(),
current_options.get_ysize() );
// Initialize windows
if ( current_options.get_game_mode() == 0 ) {
// Open the regular window
xglutCreateWindow("Flight Gear");
#ifndef GLUT_WRONG_VERSION
} else {
// Open the cool new 'game mode' window
char game_mode_str[256];
sprintf( game_mode_str, "width=%d height=%d bpp=32",
current_options.get_xsize(),
current_options.get_ysize() );
FG_LOG( FG_GENERAL, FG_INFO,
"game mode params = " << game_mode_str );
glutGameModeString( game_mode_str );
glutEnterGameMode();
#endif
}
// This seems to be the absolute earliest in the init sequence
// that these calls will return valid info. Too bad it's after
// we've already created and sized out window. :-(
general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
FG_LOG ( FG_GENERAL, FG_INFO, general.get_glRenderer() );
#if 0
// try to determine if we should adjust the initial default
// display resolution. The options class defaults (is
// initialized) to 640x480.
string renderer = general.glRenderer;
// currently we only know how to deal with Mesa/Glide/Voodoo cards
if ( renderer.find( "Glide" ) != string::npos ) {
FG_LOG( FG_GENERAL, FG_INFO, "Detected a Glide driver" );
if ( renderer.find( "FB/8" ) != string::npos ) {
// probably a voodoo-2
if ( renderer.find( "TMU/SLI" ) != string::npos ) {
// probably two SLI'd Voodoo-2's
current_options.set_xsize( 1024 );
current_options.set_ysize( 768 );
FG_LOG( FG_GENERAL, FG_INFO,
"It looks like you have two sli'd voodoo-2's." << endl
<< "upgrading your win resolution to 1024 x 768" );
glutReshapeWindow(1024, 768);
} else {
// probably a single non-SLI'd Voodoo-2
current_options.set_xsize( 800 );
current_options.set_ysize( 600 );
FG_LOG( FG_GENERAL, FG_INFO,
"It looks like you have a voodoo-2." << endl
<< "upgrading your win resolution to 800 x 600" );
glutReshapeWindow(800, 600);
}
} else if ( renderer.find( "FB/2" ) != string::npos ) {
// probably a voodoo-1, stick with the default
}
} else {
// we have no special knowledge of this card, stick with the default
}
#endif
return(1);
}
// Initialize GLUT event handlers
int fgGlutInitEvents( void ) {
// call fgReshape() on window resizes
xglutReshapeFunc( fgReshape );
// call GLUTkey() on keyboard event
xglutKeyboardFunc( GLUTkey );
glutSpecialFunc( GLUTspecialkey );
// call guiMouseFunc() whenever our little rodent is used
glutMouseFunc ( guiMouseFunc );
glutMotionFunc (guiMotionFunc );
glutPassiveMotionFunc (guiMotionFunc );
// call fgMainLoop() whenever there is
// nothing else to do
xglutIdleFunc( fgIdleFunction );
// draw the scene
xglutDisplayFunc( fgRenderFrame );
return(1);
}
// Main ...
int main( int argc, char **argv ) {
#ifdef MACOS
# ifndef FG_NDEBUG
// -dw- this will not work unless called before any standard
// output, so why not put it here?
SIOUXSettings.toppixel = 540;
SIOUXSettings.leftpixel = 50;
SIOUXSettings.rows = 15;
# endif
#endif
FGInterface *f;
f = current_aircraft.fdm_state;
#ifdef HAVE_BC5PLUS
_control87(MCW_EM, MCW_EM); /* defined in float.h */
#endif
// set default log levels
fglog().setLogLevels( FG_ALL, FG_INFO );
FG_LOG( FG_GENERAL, FG_INFO, "Flight Gear: Version " << VERSION << endl );
string root;
FG_LOG( FG_GENERAL, FG_INFO, "General Initialization" );
FG_LOG( FG_GENERAL, FG_INFO, "======= ==============" );
// seed the random number generater
fg_srandom();
// Attempt to locate and parse a config file
// First check fg_root
FGPath config( current_options.get_fg_root() );
config.append( "system.fgfsrc" );
current_options.parse_config_file( config.str() );
// Next check home directory
char* envp = ::getenv( "HOME" );
if ( envp != NULL ) {
config.set( envp );
config.append( ".fgfsrc" );
current_options.parse_config_file( config.str() );
}
// Parse remaining command line options
// These will override anything specified in a config file
if ( current_options.parse_command_line(argc, argv) !=
fgOPTIONS::FG_OPTIONS_OK )
{
// Something must have gone horribly wrong with the command
// line parsing or maybe the user just requested help ... :-)
current_options.usage();
FG_LOG( FG_GENERAL, FG_ALERT, "\nExiting ...");
exit(-1);
}
// Initialize the Window/Graphics environment.
if( !fgGlutInit(&argc, argv) ) {
FG_LOG( FG_GENERAL, FG_ALERT, "GLUT initialization failed ..." );
exit(-1);
}
// Initialize the various GLUT Event Handlers.
if( !fgGlutInitEvents() ) {
FG_LOG( FG_GENERAL, FG_ALERT,
"GLUT event handler initialization failed ..." );
exit(-1);
}
// Init the user interface (we need to do this before passing off
// control to glut and before fgInitGeneral to get our fonts !!!
guiInit();
// First do some quick general initializations
if( !fgInitGeneral()) {
FG_LOG( FG_GENERAL, FG_ALERT,
"General initializations failed ..." );
exit(-1);
}
// pass control off to the master GLUT event handler
glutMainLoop();
// we never actually get here ... but just in case ... :-)
return(0);
}
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