500 lines
13 KiB
C++
500 lines
13 KiB
C++
//
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// options.cxx -- class to handle command line options
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//
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// Written by Curtis Olson, started April 1998.
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//
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// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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// (Log is kept at end of this file)
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <math.h> // rint()
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#include <stdio.h>
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#include <stdlib.h> // atof(), atoi()
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#include <string.h>
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#include <Debug/fg_debug.h>
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#include <Include/fg_constants.h>
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#include <Include/fg_zlib.h>
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#include "options.hxx"
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// Defined the shared options class here
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fgOPTIONS current_options;
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// Constructor
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fgOPTIONS::fgOPTIONS( void ) {
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// set initial values/defaults
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if ( getenv("FG_ROOT") != NULL ) {
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// fg_root could be anywhere, so default to environmental
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// variable $FG_ROOT if it is set.
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strcpy(fg_root, getenv("FG_ROOT"));
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} else {
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// Otherwise, default to a random compiled in location if
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// $FG_ROOT is not set. This can still be overridden from the
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// command line or a config file.
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#if defined(WIN32)
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strcpy(fg_root, "\\FlightGear");
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#else
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strcpy(fg_root, "/usr/local/lib/FlightGear");
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#endif
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}
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// default airport id
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strcpy(airport_id, "");
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// Features
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hud_status = 1;
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panel_status = 1;
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// Rendering options
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fog = 2; // nicest
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fov = 65.0;
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fullscreen = 0;
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shading = 1;
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skyblend = 1;
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textures = 1;
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wireframe = 0;
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// Scenery options
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tile_diameter = 7;
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// Time options
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time_offset = 0;
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}
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// Parse an int out of a --foo-bar=n type option
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static int parse_int(char *arg) {
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int result;
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// advance past the '='
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while ( (arg[0] != '=') && (arg[0] != '\0') ) {
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arg++;
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}
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if ( arg[0] == '=' ) {
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arg++;
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}
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printf("parse_int(): arg = %s\n", arg);
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result = atoi(arg);
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printf("parse_int(): result = %d\n", result);
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return(result);
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}
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// Parse an int out of a --foo-bar=n type option
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static double parse_double(char *arg) {
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double result;
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// advance past the '='
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while ( (arg[0] != '=') && (arg[0] != '\0') ) {
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arg++;
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}
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if ( arg[0] == '=' ) {
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arg++;
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}
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printf("parse_double(): arg = %s\n", arg);
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result = atof(arg);
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printf("parse_double(): result = %.4f\n", result);
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return(result);
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}
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// parse time string in the form of [+-]hh:mm:ss, returns the value in seconds
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static double parse_time(char *time_str) {
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char num[256];
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double hours, minutes, seconds;
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double result = 0.0;
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int sign = 1;
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int i;
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// printf("parse_time(): %s\n", time_str);
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// check for sign
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if ( strlen(time_str) ) {
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if ( time_str[0] == '+' ) {
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sign = 1;
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time_str++;
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} else if ( time_str[0] == '-' ) {
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sign = -1;
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time_str++;
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}
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}
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// printf("sign = %d\n", sign);
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// get hours
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if ( strlen(time_str) ) {
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i = 0;
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while ( (time_str[0] != ':') && (time_str[0] != '\0') ) {
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num[i] = time_str[0];
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time_str++;
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i++;
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}
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if ( time_str[0] == ':' ) {
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time_str++;
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}
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num[i] = '\0';
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hours = atof(num);
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// printf("hours = %.2lf\n", hours);
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result += hours * 3600.0;
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}
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// get minutes
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if ( strlen(time_str) ) {
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i = 0;
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while ( (time_str[0] != ':') && (time_str[0] != '\0') ) {
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num[i] = time_str[0];
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time_str++;
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i++;
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}
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if ( time_str[0] == ':' ) {
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time_str++;
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}
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num[i] = '\0';
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minutes = atof(num);
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// printf("minutes = %.2lf\n", minutes);
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result += minutes * 60.0;
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}
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// get seconds
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if ( strlen(time_str) ) {
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i = 0;
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while ( (time_str[0] != ':') && (time_str[0] != '\0') ) {
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num[i] = time_str[0];
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time_str++;
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i++;
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}
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num[i] = '\0';
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seconds = atof(num);
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// printf("seconds = %.2lf\n", seconds);
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result += seconds;
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}
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return(sign * result);
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}
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// parse time offset command line option
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static int parse_time_offset(char *time_str) {
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int result;
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time_str += 14;
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// printf("time offset = %s\n", time_str);
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#ifdef HAVE_RINT
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result = (int)rint(parse_time(time_str));
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#else
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result = (int)parse_time(time_str);
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#endif
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printf("parse_time_offset(): %d\n", result);
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return( result );
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}
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// Parse --tile-diameter=n type option
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#define FG_RADIUS_MIN 1
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#define FG_RADIUS_MAX 4
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static int parse_tile_radius(char *arg) {
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int radius, tmp;
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radius = parse_int(arg);
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if ( radius < FG_RADIUS_MIN ) { radius = FG_RADIUS_MIN; }
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if ( radius > FG_RADIUS_MAX ) { radius = FG_RADIUS_MAX; }
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printf("parse_tile_radius(): radius = %d\n", radius);
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return(radius);
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}
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// Parse --fov=x.xx type option
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static double parse_fov(char *arg) {
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double fov;
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fov = parse_double(arg);
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if ( fov < FG_FOV_MIN ) { fov = FG_FOV_MIN; }
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if ( fov > FG_FOV_MAX ) { fov = FG_FOV_MAX; }
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printf("parse_fov(): result = %.4f\n", fov);
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return(fov);
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}
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// Parse a single option
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int fgOPTIONS::parse_option( char *arg ) {
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// General Options
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if ( (strcmp(arg, "--help") == 0) ||
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(strcmp(arg, "-h") == 0) ) {
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// help/usage request
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return(FG_OPTIONS_HELP);
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} else if ( strcmp(arg, "--disable-hud") == 0 ) {
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hud_status = 0;
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} else if ( strcmp(arg, "--enable-hud") == 0 ) {
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hud_status = 1;
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} else if ( strncmp(arg, "--airport-id=", 13) == 0 ) {
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arg += 13;
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strncpy(airport_id, arg, 4);
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} else if ( strncmp(arg, "--fg-root=", 10) == 0 ) {
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arg += 10;
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strcpy(fg_root, arg);
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} else if ( strcmp(arg, "--fog-disable") == 0 ) {
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fog = 0;
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} else if ( strcmp(arg, "--fog-fastest") == 0 ) {
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fog = 1;
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} else if ( strcmp(arg, "--fog-nicest") == 0 ) {
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fog = 2;
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} else if ( strncmp(arg, "--fov=", 6) == 0 ) {
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fov = parse_fov(arg);
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} else if ( strcmp(arg, "--disable-fullscreen") == 0 ) {
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fullscreen = 0;
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} else if ( strcmp(arg, "--enable-fullscreen") == 0 ) {
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fullscreen = 1;
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} else if ( strcmp(arg, "--shading-flat") == 0 ) {
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shading = 0;
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} else if ( strcmp(arg, "--shading-smooth") == 0 ) {
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shading = 1;
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} else if ( strcmp(arg, "--disable-skyblend") == 0 ) {
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skyblend = 0;
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} else if ( strcmp(arg, "--enable-skyblend") == 0 ) {
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skyblend = 1;
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} else if ( strcmp(arg, "--disable-textures") == 0 ) {
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textures = 0;
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} else if ( strcmp(arg, "--enable-textures") == 0 ) {
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textures = 1;
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} else if ( strcmp(arg, "--disable-wireframe") == 0 ) {
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wireframe = 0;
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} else if ( strcmp(arg, "--enable-wireframe") == 0 ) {
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wireframe = 1;
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} else if ( strncmp(arg, "--tile-radius=", 14) == 0 ) {
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tile_radius = parse_tile_radius(arg);
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tile_diameter = tile_radius * 2 + 1;
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} else if ( strncmp(arg, "--time-offset=", 14) == 0 ) {
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time_offset = parse_time_offset(arg);
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} else {
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return(FG_OPTIONS_ERROR);
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}
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return(FG_OPTIONS_OK);
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}
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// Parse the command line options
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int fgOPTIONS::parse_command_line( int argc, char **argv ) {
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int i = 1;
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int result;
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fgPrintf(FG_GENERAL, FG_INFO, "Processing command line arguments\n");
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while ( i < argc ) {
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fgPrintf(FG_GENERAL, FG_INFO, "argv[%d] = %s\n", i, argv[i]);
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result = parse_option(argv[i]);
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if ( (result == FG_OPTIONS_HELP) || (result == FG_OPTIONS_ERROR) ) {
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return(result);
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}
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i++;
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}
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return(FG_OPTIONS_OK);
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}
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// Parse the command line options
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int fgOPTIONS::parse_config_file( char *path ) {
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char fgpath[256], line[256];
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fgFile f;
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int len, result;
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strcpy(fgpath, path);
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strcat(fgpath, ".gz");
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// first try "path.gz"
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if ( (f = fgopen(fgpath, "rb")) == NULL ) {
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// next try "path"
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if ( (f = fgopen(path, "rb")) == NULL ) {
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return(FG_OPTIONS_ERROR);
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}
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}
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fgPrintf(FG_GENERAL, FG_INFO, "Processing config file: %s\n", path);
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while ( fggets(f, line, 250) != NULL ) {
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// strip trailing newline if it exists
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len = strlen(line);
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if ( line[len-1] == '\n' ) {
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line[len-1] = '\0';
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}
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result = parse_option(line);
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if ( result == FG_OPTIONS_ERROR ) {
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fgPrintf( FG_GENERAL, FG_EXIT,
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"Config file parse error: %s '%s'\n", path, line );
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}
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}
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fgclose(f);
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return(FG_OPTIONS_OK);
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}
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// Print usage message
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void fgOPTIONS::usage ( void ) {
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printf("Usage: fg [ options ... ]\n");
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printf("\n");
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printf("General Options:\n");
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printf("\t--help -h: print usage\n");
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printf("\t--fg-root=path: specify the root path for all the data files\n");
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printf("\n");
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printf("Features:\n");
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printf("\t--disable-hud: disable heads up display\n");
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printf("\t--enable-hud: enable heads up display\n");
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printf("\n");
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printf("Initial Position:\n");
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printf("\t--airport-id=ABCD: specify starting postion by airport id\n");
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printf("\n");
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printf("Rendering Options:\n");
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printf("\t--fog-disable: disable fog/haze\n");
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printf("\t--fog-fastest: enable fastest fog/haze\n");
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printf("\t--fog-nicest: enable nicest fog/haze\n");
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printf("\t--fov=xx.x: specify initial field of view angle in degrees\n");
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printf("\t--disable-fullscreen: disable fullscreen mode\n");
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printf("\t--enable-fullscreen: enable fullscreen mode\n");
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printf("\t--shading-flat: enable flat shading\n");
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printf("\t--shading-smooth: enable smooth shading\n");
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printf("\t--disable-skyblend: disable sky blending\n");
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printf("\t--enable-skyblend: enable sky blending\n");
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printf("\t--disable-textures: disable textures\n");
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printf("\t--enable-textures: enable textures\n");
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printf("\t--disable-wireframe: disable wireframe drawing mode\n");
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printf("\t--enable-wireframe: enable wireframe drawing mode\n");
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printf("\n");
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printf("Scenery Options:\n");
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printf("\t--tile-radius=n: specify tile radius, must be 1 - 4\n");
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printf("\n");
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printf("Time Options:\n");
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printf("\t--time-offset=[+-]hh:mm:ss: offset local time by this amount\n");
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}
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// Destructor
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fgOPTIONS::~fgOPTIONS( void ) {
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}
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// $Log$
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// Revision 1.13 1998/06/27 16:54:34 curt
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// Replaced "extern displayInstruments" with a entry in fgOPTIONS.
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// Don't change the view port when displaying the panel.
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//
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// Revision 1.12 1998/06/17 21:35:13 curt
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// Refined conditional audio support compilation.
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// Moved texture parameter setup calls to ../Scenery/materials.cxx
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// #include <string.h> before various STL includes.
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// Make HUD default state be enabled.
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//
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// Revision 1.11 1998/06/13 00:40:33 curt
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// Tweaked fog command line options.
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//
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// Revision 1.10 1998/05/16 13:08:36 curt
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// C++ - ified views.[ch]xx
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// Shuffled some additional view parameters into the fgVIEW class.
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// Changed tile-radius to tile-diameter because it is a much better
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// name.
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// Added a WORLD_TO_EYE transformation to views.cxx. This allows us
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// to transform world space to eye space for view frustum culling.
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//
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// Revision 1.9 1998/05/13 18:29:59 curt
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// Added a keyboard binding to dynamically adjust field of view.
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// Added a command line option to specify fov.
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// Adjusted terrain color.
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// Root path info moved to fgOPTIONS.
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// Added ability to parse options out of a config file.
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//
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// Revision 1.8 1998/05/07 23:14:16 curt
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// Added "D" key binding to set autopilot heading.
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// Made frame rate calculation average out over last 10 frames.
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// Borland C++ floating point exception workaround.
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// Added a --tile-radius=n option.
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//
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// Revision 1.7 1998/05/06 03:16:25 curt
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// Added an averaged global frame rate counter.
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// Added an option to control tile radius.
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//
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// Revision 1.6 1998/05/03 00:47:32 curt
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// Added an option to enable/disable full-screen mode.
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//
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// Revision 1.5 1998/04/30 12:34:19 curt
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// Added command line rendering options:
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// enable/disable fog/haze
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// specify smooth/flat shading
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// disable sky blending and just use a solid color
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// enable wireframe drawing mode
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//
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// Revision 1.4 1998/04/28 01:20:22 curt
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// Type-ified fgTIME and fgVIEW.
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// Added a command line option to disable textures.
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//
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// Revision 1.3 1998/04/26 05:01:19 curt
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// Added an rint() / HAVE_RINT check.
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//
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// Revision 1.2 1998/04/25 15:11:12 curt
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// Added an command line option to set starting position based on airport ID.
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//
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// Revision 1.1 1998/04/24 00:49:21 curt
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// Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
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// Trying out some different option parsing code.
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// Some code reorganization.
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//
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//
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