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flightgear/Main/options.cxx
curt e461053c78 Refined conditional audio support compilation. 
Moved texture parameter setup calls to ../Scenery/materials.cxx
#include <string.h> before various STL includes.
Make HUD default state be enabled.
1998-06-17 21:35:10 +00:00

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//
// options.cxx -- class to handle command line options
//
// Written by Curtis Olson, started April 1998.
//
// Copyright (C) 1998 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.
//
// $Id$
// (Log is kept at end of this file)
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <math.h> // rint()
#include <stdio.h>
#include <stdlib.h> // atof(), atoi()
#include <string.h>
#include <Debug/fg_debug.h>
#include <Include/fg_constants.h>
#include <Include/fg_zlib.h>
#include "options.hxx"
// Defined the shared options class here
fgOPTIONS current_options;
// Constructor
fgOPTIONS::fgOPTIONS( void ) {
// set initial values/defaults
if ( getenv("FG_ROOT") != NULL ) {
// fg_root could be anywhere, so default to environmental
// variable $FG_ROOT if it is set.
strcpy(fg_root, getenv("FG_ROOT"));
} else {
// Otherwise, default to a random compiled in location if
// $FG_ROOT is not set. This can still be overridden from the
// command line or a config file.
#if defined(WIN32)
strcpy(fg_root, "\\FlightGear");
#else
strcpy(fg_root, "/usr/local/lib/FlightGear");
#endif
}
// default airport id
strcpy(airport_id, "");
// Features
hud_status = 1;
// Rendering options
fog = 2; // nicest
fov = 65.0;
fullscreen = 0;
shading = 1;
skyblend = 1;
textures = 1;
wireframe = 0;
// Scenery options
tile_diameter = 7;
// Time options
time_offset = 0;
}
// Parse an int out of a --foo-bar=n type option
static int parse_int(char *arg) {
int result;
// advance past the '='
while ( (arg[0] != '=') && (arg[0] != '\0') ) {
arg++;
}
if ( arg[0] == '=' ) {
arg++;
}
printf("parse_int(): arg = %s\n", arg);
result = atoi(arg);
printf("parse_int(): result = %d\n", result);
return(result);
}
// Parse an int out of a --foo-bar=n type option
static double parse_double(char *arg) {
double result;
// advance past the '='
while ( (arg[0] != '=') && (arg[0] != '\0') ) {
arg++;
}
if ( arg[0] == '=' ) {
arg++;
}
printf("parse_double(): arg = %s\n", arg);
result = atof(arg);
printf("parse_double(): result = %.4f\n", result);
return(result);
}
// parse time string in the form of [+-]hh:mm:ss, returns the value in seconds
static double parse_time(char *time_str) {
char num[256];
double hours, minutes, seconds;
double result = 0.0;
int sign = 1;
int i;
// printf("parse_time(): %s\n", time_str);
// check for sign
if ( strlen(time_str) ) {
if ( time_str[0] == '+' ) {
sign = 1;
time_str++;
} else if ( time_str[0] == '-' ) {
sign = -1;
time_str++;
}
}
// printf("sign = %d\n", sign);
// get hours
if ( strlen(time_str) ) {
i = 0;
while ( (time_str[0] != ':') && (time_str[0] != '\0') ) {
num[i] = time_str[0];
time_str++;
i++;
}
if ( time_str[0] == ':' ) {
time_str++;
}
num[i] = '\0';
hours = atof(num);
// printf("hours = %.2lf\n", hours);
result += hours * 3600.0;
}
// get minutes
if ( strlen(time_str) ) {
i = 0;
while ( (time_str[0] != ':') && (time_str[0] != '\0') ) {
num[i] = time_str[0];
time_str++;
i++;
}
if ( time_str[0] == ':' ) {
time_str++;
}
num[i] = '\0';
minutes = atof(num);
// printf("minutes = %.2lf\n", minutes);
result += minutes * 60.0;
}
// get seconds
if ( strlen(time_str) ) {
i = 0;
while ( (time_str[0] != ':') && (time_str[0] != '\0') ) {
num[i] = time_str[0];
time_str++;
i++;
}
num[i] = '\0';
seconds = atof(num);
// printf("seconds = %.2lf\n", seconds);
result += seconds;
}
return(sign * result);
}
// parse time offset command line option
static int parse_time_offset(char *time_str) {
int result;
time_str += 14;
// printf("time offset = %s\n", time_str);
#ifdef HAVE_RINT
result = (int)rint(parse_time(time_str));
#else
result = (int)parse_time(time_str);
#endif
printf("parse_time_offset(): %d\n", result);
return( result );
}
// Parse --tile-diameter=n type option
#define FG_RADIUS_MIN 1
#define FG_RADIUS_MAX 4
static int parse_tile_radius(char *arg) {
int radius, tmp;
radius = parse_int(arg);
if ( radius < FG_RADIUS_MIN ) { radius = FG_RADIUS_MIN; }
if ( radius > FG_RADIUS_MAX ) { radius = FG_RADIUS_MAX; }
printf("parse_tile_radius(): radius = %d\n", radius);
return(radius);
}
// Parse --fov=x.xx type option
static double parse_fov(char *arg) {
double fov;
fov = parse_double(arg);
if ( fov < FG_FOV_MIN ) { fov = FG_FOV_MIN; }
if ( fov > FG_FOV_MAX ) { fov = FG_FOV_MAX; }
printf("parse_fov(): result = %.4f\n", fov);
return(fov);
}
// Parse a single option
int fgOPTIONS::parse_option( char *arg ) {
// General Options
if ( (strcmp(arg, "--help") == 0) ||
(strcmp(arg, "-h") == 0) ) {
// help/usage request
return(FG_OPTIONS_HELP);
} else if ( strcmp(arg, "--disable-hud") == 0 ) {
hud_status = 0;
} else if ( strcmp(arg, "--enable-hud") == 0 ) {
hud_status = 1;
} else if ( strncmp(arg, "--airport-id=", 13) == 0 ) {
arg += 13;
strncpy(airport_id, arg, 4);
} else if ( strncmp(arg, "--fg-root=", 10) == 0 ) {
arg += 10;
strcpy(fg_root, arg);
} else if ( strcmp(arg, "--fog-disable") == 0 ) {
fog = 0;
} else if ( strcmp(arg, "--fog-fastest") == 0 ) {
fog = 1;
} else if ( strcmp(arg, "--fog-nicest") == 0 ) {
fog = 2;
} else if ( strncmp(arg, "--fov=", 6) == 0 ) {
fov = parse_fov(arg);
} else if ( strcmp(arg, "--disable-fullscreen") == 0 ) {
fullscreen = 0;
} else if ( strcmp(arg, "--enable-fullscreen") == 0 ) {
fullscreen = 1;
} else if ( strcmp(arg, "--shading-flat") == 0 ) {
shading = 0;
} else if ( strcmp(arg, "--shading-smooth") == 0 ) {
shading = 1;
} else if ( strcmp(arg, "--disable-skyblend") == 0 ) {
skyblend = 0;
} else if ( strcmp(arg, "--enable-skyblend") == 0 ) {
skyblend = 1;
} else if ( strcmp(arg, "--disable-textures") == 0 ) {
textures = 0;
} else if ( strcmp(arg, "--enable-textures") == 0 ) {
textures = 1;
} else if ( strcmp(arg, "--disable-wireframe") == 0 ) {
wireframe = 0;
} else if ( strcmp(arg, "--enable-wireframe") == 0 ) {
wireframe = 1;
} else if ( strncmp(arg, "--tile-radius=", 14) == 0 ) {
tile_radius = parse_tile_radius(arg);
tile_diameter = tile_radius * 2 + 1;
} else if ( strncmp(arg, "--time-offset=", 14) == 0 ) {
time_offset = parse_time_offset(arg);
} else {
return(FG_OPTIONS_ERROR);
}
return(FG_OPTIONS_OK);
}
// Parse the command line options
int fgOPTIONS::parse_command_line( int argc, char **argv ) {
int i = 1;
int result;
fgPrintf(FG_GENERAL, FG_INFO, "Processing command line arguments\n");
while ( i < argc ) {
fgPrintf(FG_GENERAL, FG_INFO, "argv[%d] = %s\n", i, argv[i]);
result = parse_option(argv[i]);
if ( (result == FG_OPTIONS_HELP) || (result == FG_OPTIONS_ERROR) ) {
return(result);
}
i++;
}
return(FG_OPTIONS_OK);
}
// Parse the command line options
int fgOPTIONS::parse_config_file( char *path ) {
char fgpath[256], line[256];
fgFile f;
int len, result;
strcpy(fgpath, path);
strcat(fgpath, ".gz");
// first try "path.gz"
if ( (f = fgopen(fgpath, "rb")) == NULL ) {
// next try "path"
if ( (f = fgopen(path, "rb")) == NULL ) {
return(FG_OPTIONS_ERROR);
}
}
fgPrintf(FG_GENERAL, FG_INFO, "Processing config file: %s\n", path);
while ( fggets(f, line, 250) != NULL ) {
// strip trailing newline if it exists
len = strlen(line);
if ( line[len-1] == '\n' ) {
line[len-1] = '\0';
}
result = parse_option(line);
if ( result == FG_OPTIONS_ERROR ) {
fgPrintf( FG_GENERAL, FG_EXIT,
"Config file parse error: %s '%s'\n", path, line );
}
}
fgclose(f);
return(FG_OPTIONS_OK);
}
// Print usage message
void fgOPTIONS::usage ( void ) {
printf("Usage: fg [ options ... ]\n");
printf("\n");
printf("General Options:\n");
printf("\t--help -h: print usage\n");
printf("\t--fg-root=path: specify the root path for all the data files\n");
printf("\n");
printf("Features:\n");
printf("\t--disable-hud: disable heads up display\n");
printf("\t--enable-hud: enable heads up display\n");
printf("\n");
printf("Initial Position:\n");
printf("\t--airport-id=ABCD: specify starting postion by airport id\n");
printf("\n");
printf("Rendering Options:\n");
printf("\t--fog-disable: disable fog/haze\n");
printf("\t--fog-fastest: enable fastest fog/haze\n");
printf("\t--fog-nicest: enable nicest fog/haze\n");
printf("\t--fov=xx.x: specify initial field of view angle in degrees\n");
printf("\t--disable-fullscreen: disable fullscreen mode\n");
printf("\t--enable-fullscreen: enable fullscreen mode\n");
printf("\t--shading-flat: enable flat shading\n");
printf("\t--shading-smooth: enable smooth shading\n");
printf("\t--disable-skyblend: disable sky blending\n");
printf("\t--enable-skyblend: enable sky blending\n");
printf("\t--disable-textures: disable textures\n");
printf("\t--enable-textures: enable textures\n");
printf("\t--disable-wireframe: disable wireframe drawing mode\n");
printf("\t--enable-wireframe: enable wireframe drawing mode\n");
printf("\n");
printf("Scenery Options:\n");
printf("\t--tile-radius=n: specify tile radius, must be 1 - 4\n");
printf("\n");
printf("Time Options:\n");
printf("\t--time-offset=[+-]hh:mm:ss: offset local time by this amount\n");
}
// Destructor
fgOPTIONS::~fgOPTIONS( void ) {
}
// $Log$
// Revision 1.12 1998/06/17 21:35:13 curt
// Refined conditional audio support compilation.
// Moved texture parameter setup calls to ../Scenery/materials.cxx
// #include <string.h> before various STL includes.
// Make HUD default state be enabled.
//
// Revision 1.11 1998/06/13 00:40:33 curt
// Tweaked fog command line options.
//
// Revision 1.10 1998/05/16 13:08:36 curt
// C++ - ified views.[ch]xx
// Shuffled some additional view parameters into the fgVIEW class.
// Changed tile-radius to tile-diameter because it is a much better
// name.
// Added a WORLD_TO_EYE transformation to views.cxx. This allows us
// to transform world space to eye space for view frustum culling.
//
// Revision 1.9 1998/05/13 18:29:59 curt
// Added a keyboard binding to dynamically adjust field of view.
// Added a command line option to specify fov.
// Adjusted terrain color.
// Root path info moved to fgOPTIONS.
// Added ability to parse options out of a config file.
//
// Revision 1.8 1998/05/07 23:14:16 curt
// Added "D" key binding to set autopilot heading.
// Made frame rate calculation average out over last 10 frames.
// Borland C++ floating point exception workaround.
// Added a --tile-radius=n option.
//
// Revision 1.7 1998/05/06 03:16:25 curt
// Added an averaged global frame rate counter.
// Added an option to control tile radius.
//
// Revision 1.6 1998/05/03 00:47:32 curt
// Added an option to enable/disable full-screen mode.
//
// Revision 1.5 1998/04/30 12:34:19 curt
// Added command line rendering options:
// enable/disable fog/haze
// specify smooth/flat shading
// disable sky blending and just use a solid color
// enable wireframe drawing mode
//
// Revision 1.4 1998/04/28 01:20:22 curt
// Type-ified fgTIME and fgVIEW.
// Added a command line option to disable textures.
//
// Revision 1.3 1998/04/26 05:01:19 curt
// Added an rint() / HAVE_RINT check.
//
// Revision 1.2 1998/04/25 15:11:12 curt
// Added an command line option to set starting position based on airport ID.
//
// Revision 1.1 1998/04/24 00:49:21 curt
// Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
// Trying out some different option parsing code.
// Some code reorganization.
//
//
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