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flightgear/Scenery/tilemgr.c

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1998-01-07 23:50:01 +00:00
/**************************************************************************
* tilemgr.c -- routines to handle dynamic management of scenery tiles
*
* Written by Curtis Olson, started January 1998.
*
* 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 WIN32
# include <windows.h>
#endif
#include <GL/glut.h>
#include "../XGL/xgl.h"
#include "tileutils.h"
#include "../Aircraft/aircraft.h"
/* here's where we keep the array of closest (potentially viewable) tiles */
static long int tile[49];
/* Initialize the Tile Manager subsystem */
void fgTileMgrInit() {
printf("Initializing Tile Manager subsystem.\n");
/* fgTileCacheInit(); */
}
/* given the current lon/lat, fill in the array of local chunks. If
* the chunk isn't already in the cache, then read it from disk. */
void fgTileMgrUpdate() {
struct fgFLIGHT *f;
struct bucket p;
f = &current_aircraft.flight;
find_bucket(FG_Longitude, FG_Latitude, &p);
gen_idx_array(&p, tile, 7, 7);
}
/* $Log$
/* Revision 1.1 1998/01/07 23:50:51 curt
/* "area" renamed to "tile"
/*
* Revision 1.2 1998/01/07 03:29:29 curt
* Given an arbitrary lat/lon, we can now:
* generate a unique index for the chunk containing the lat/lon
* generate a path name to the chunk file
* build a list of the indexes of all the nearby areas.
*
* Revision 1.1 1998/01/07 02:05:48 curt
* Initial revision.
* */