flightgear/Scenery/scenery.cxx

/* -*- Mode: C++ -*-
 *
 * scenery.c -- data structures and routines for managing scenery.
 *
 * Written by Curtis Olson, started May 1997.
 *
 * Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
 *
 * 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

#ifdef HAVE_WINDOWS_H
#  include <windows.h>
#endif

#include <GL/glut.h>
#include <XGL/xgl.h>

#include <stdio.h>
#include <string.h>

#include <Debug/fg_debug.h>
#include <Main/options.hxx>

#include "obj.hxx"
#include "scenery.hxx"
// #include "texload.h"


/* Temporary hack until we get a better texture management system running */
GLint area_texture;


/* Shared structure to hold current scenery parameters */
struct fgSCENERY scenery;


/* Initialize the Scenery Management system */
int fgSceneryInit( void ) {
    fgOPTIONS *o;
    // char path[1024], fgpath[1024];
    // GLubyte *texbuf;
    // int width, height;

    o = &current_options;

    fgPrintf(FG_TERRAIN, FG_INFO, "Initializing scenery subsystem\n");

#ifdef 0
    /* set the default terrain detail level */
    // scenery.terrain_skip = 6;

    /* temp: load in a demo texture */
    path[0] = '\0';
    strcat(path, o->fg_root);
    strcat(path, "/Textures/");
    strcat(path, "desert.rgb");

    // Try uncompressed
    if ( (texbuf = read_rgb_texture(path, &width, &height)) == NULL ) {
	// Try compressed
	strcpy(fgpath, path);
	strcat(fgpath, ".gz");
	if ( (texbuf = read_rgb_texture(fgpath, &width, &height)) == NULL ) {
	    fgPrintf( FG_GENERAL, FG_EXIT, "Error in loading texture %s\n",
		      path );
	    return(0);
	} 
    } 

    xglTexImage2D(GL_TEXTURE_2D, 0, 3, width, height, 0,
		  GL_RGB, GL_UNSIGNED_BYTE, texbuf);
#endif // 0
    return(1);
}


/* Tell the scenery manager where we are so it can load the proper data, and
 * build the proper structures. */
void fgSceneryUpdate(double lon, double lat, double elev) {
    fgOPTIONS *o;
    // double max_radius;
    char path[1024];

    o = &current_options;

    /* a hardcoded hack follows */

    /* this routine should parse the file, and make calls back to the
     * scenery management system to build the appropriate structures */
    path[0] = '\0';
    strcat(path, o->fg_root);
    strcat(path, "/Scenery/");
    strcat(path, "mesa-e.obj");

    // fgPrintf(FG_TERRAIN, FG_DEBUG, "  Loading Scenery: %s\n", path);

    // area_terrain = fgObjLoad(path, &scenery.center, &max_radius);
}


/* Render out the current scene */
void fgSceneryRender( void ) {
}


/* $Log$
/* Revision 1.5  1998/06/17 21:36:41  curt
/* Load and manage multiple textures defined in the Materials library.
/* Boost max material fagments for each material property to 800.
/* Multiple texture support when rendering.
/*
 * Revision 1.4  1998/05/13 18:26:40  curt
 * Root path info moved to fgOPTIONS.
 *
 * Revision 1.3  1998/05/07 23:15:20  curt
 * Fixed a glTexImage2D() usage bug where width and height were mis-swapped.
 * Added support for --tile-radius=n option.
 *
 * Revision 1.2  1998/05/02 01:52:16  curt
 * Playing around with texture coordinates.
 *
 * Revision 1.1  1998/04/30 12:35:30  curt
 * Added a command line rendering option specify smooth/flat shading.
 *
 * Revision 1.42  1998/04/28 21:43:27  curt
 * Wrapped zlib calls up so we can conditionally comment out zlib support.
 *
 * Revision 1.41  1998/04/24 00:51:08  curt
 * Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
 * Tweaked the scenery file extentions to be "file.obj" (uncompressed)
 * or "file.obz" (compressed.)
 *
 * Revision 1.40  1998/04/18 04:14:06  curt
 * Moved fg_debug.c to it's own library.
 *
 * Revision 1.39  1998/04/08 23:30:07  curt
 * Adopted Gnu automake/autoconf system.
 *
 * Revision 1.38  1998/04/03 22:11:37  curt
 * Converting to Gnu autoconf system.
 *
 * Revision 1.37  1998/03/23 21:23:05  curt
 * Debugging output tweaks.
 *
 * Revision 1.36  1998/03/14 00:30:50  curt
 * Beginning initial terrain texturing experiments.
 *
 * Revision 1.35  1998/01/31 00:43:26  curt
 * Added MetroWorks patches from Carmen Volpe.
 *
 * Revision 1.34  1998/01/27 03:26:43  curt
 * Playing with new fgPrintf command.
 *
 * Revision 1.33  1998/01/19 19:27:17  curt
 * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
 * This should simplify things tremendously.
 *
 * Revision 1.32  1998/01/19 18:40:37  curt
 * Tons of little changes to clean up the code and to remove fatal errors
 * when building with the c++ compiler.
 *
 * Revision 1.31  1998/01/13 00:23:11  curt
 * Initial changes to support loading and management of scenery tiles.  Note,
 * there's still a fair amount of work left to be done.
 *
 * Revision 1.30  1998/01/07 03:22:29  curt
 * Moved astro stuff to .../Src/Astro/
 *
 * Revision 1.29  1997/12/30 20:47:52  curt
 * Integrated new event manager with subsystem initializations.
 *
 * Revision 1.28  1997/12/15 23:55:02  curt
 * Add xgl wrappers for debugging.
 * Generate terrain normals on the fly.
 *
 * Revision 1.27  1997/12/12 21:41:30  curt
 * More light/material property tweaking ... still a ways off.
 *
 * Revision 1.26  1997/12/12 19:52:58  curt
 * Working on lightling and material properties.
 *
 * Revision 1.25  1997/12/10 22:37:51  curt
 * Prepended "fg" on the name of all global structures that didn't have it yet.
 * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
 *
 * Revision 1.24  1997/12/08 22:51:18  curt
 * Enhanced to handle ccw and cw tri-stripe winding.  This is a temporary
 * admission of defeat.  I will eventually go back and get all the stripes
 * wound the same way (ccw).
 *
 * Revision 1.23  1997/11/25 19:25:37  curt
 * Changes to integrate Durk's moon/sun code updates + clean up.
 *
 * Revision 1.22  1997/10/28 21:00:22  curt
 * Changing to new terrain format.
 *
 * Revision 1.21  1997/10/25 03:24:24  curt
 * Incorporated sun, moon, and star positioning code contributed by Durk Talsma.
 *
 * Revision 1.20  1997/10/25 03:18:27  curt
 * Incorporated sun, moon, and planet position and rendering code contributed
 * by Durk Talsma.
 *
 * Revision 1.19  1997/09/05 14:17:30  curt
 * More tweaking with stars.
 *
 * Revision 1.18  1997/09/05 01:35:59  curt
 * Working on getting stars right.
 *
 * Revision 1.17  1997/08/29 17:55:27  curt
 * Worked on properly aligning the stars.
 *
 * Revision 1.16  1997/08/27 21:32:29  curt
 * Restructured view calculation code.  Added stars.
 *
 * Revision 1.15  1997/08/27 03:30:32  curt
 * Changed naming scheme of basic shared structures.
 *
 * Revision 1.14  1997/08/25 20:27:24  curt
 * Merged in initial HUD and Joystick code.
 *
 * Revision 1.13  1997/08/22 21:34:41  curt
 * Doing a bit of reorganizing and house cleaning.
 *
 * Revision 1.12  1997/08/19 23:55:08  curt
 * Worked on better simulating real lighting.
 *
 * Revision 1.11  1997/08/13 20:24:22  curt
 * Changed default detail level.
 *
 * Revision 1.10  1997/08/06 00:24:30  curt
 * Working on correct real time sun lighting.
 *
 * Revision 1.9  1997/08/04 17:08:11  curt
 * Testing cvs on IRIX 6.x
 *
 * Revision 1.8  1997/07/18 23:41:27  curt
 * Tweaks for building with Cygnus Win32 compiler.
 *
 * Revision 1.7  1997/07/16 20:04:52  curt
 * Minor tweaks to aid Win32 port.
 *
 * Revision 1.6  1997/07/14 16:26:05  curt
 * Testing/playing -- placed objects randomly across the entire terrain.
 *
 * Revision 1.5  1997/07/11 03:23:19  curt
 * Solved some scenery display/orientation problems.  Still have a positioning
 * (or transformation?) problem.
 *
 * Revision 1.4  1997/07/11 01:30:03  curt
 * More tweaking of terrian floor.
 *
 * Revision 1.3  1997/06/29 21:16:50  curt
 * More twiddling with the Scenery Management system.
 *
 * Revision 1.2  1997/06/27 20:03:37  curt
 * Working on Makefile structure.
 *
 * Revision 1.1  1997/06/27 02:26:30  curt
 * Initial revision.
 *
 */