105 lines
3 KiB
C
105 lines
3 KiB
C
/**************************************************************************
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* tilecache.h -- routines to handle scenery tile caching
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*
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* Written by Curtis Olson, started January 1998.
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*
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* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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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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**************************************************************************/
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#ifndef _TILECACHE_H
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#define _TILECACHE_H
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#ifdef WIN32
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# include <windows.h>
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#endif
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#include <GL/glut.h>
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#include <XGL/xgl.h>
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#include <Scenery/bucketutils.h>
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#include <Include/fg_types.h>
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/* For best results ... i.e. to avoid tile load problems and blank areas
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*
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* FG_TILE_CACHE_SIZE >= FG_LOCAL_X_Y + 2*max(FG_LOCAL_X, FG_LOCAL_Y) + 1 */
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#define FG_TILE_CACHE_SIZE 100
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/* Tile cache record */
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struct fgTILE {
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struct fgBUCKET tile_bucket;
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GLint display_list;
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struct fgCartesianPoint local_ref;
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double bounding_radius;
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int used;
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int priority;
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};
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/* tile cache */
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extern struct fgTILE tile_cache[FG_TILE_CACHE_SIZE];
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/* Initialize the tile cache subsystem */
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void fgTileCacheInit( void );
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/* Search for the specified "bucket" in the cache */
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int fgTileCacheExists( struct fgBUCKET *p );
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/* Return index of next available slot in tile cache */
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int fgTileCacheNextAvail( void );
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/* Fill in a tile cache entry with real data for the specified bucket */
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void fgTileCacheEntryFillIn( int index, struct fgBUCKET *p );
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/* Return info for a tile cache entry */
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void fgTileCacheEntryInfo( int index, GLint *display_list,
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struct fgCartesianPoint *local_ref );
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#endif /* _TILECACHE_H */
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/* $Log$
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/* Revision 1.6 1998/02/18 15:07:10 curt
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/* Tweaks to build with SGI OpenGL (and therefor hopefully other accelerated
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/* drivers will work.)
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/*
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* Revision 1.5 1998/02/16 13:39:45 curt
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* Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
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* tiles to occasionally be missing.
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*
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* Revision 1.4 1998/01/31 00:43:27 curt
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* Added MetroWorks patches from Carmen Volpe.
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*
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* Revision 1.3 1998/01/29 00:51:40 curt
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* First pass at tile cache, dynamic tile loading and tile unloading now works.
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*
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* Revision 1.2 1998/01/27 00:48:04 curt
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* Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
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* system and commandline/config file processing code.
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*
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* Revision 1.1 1998/01/24 00:03:29 curt
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* Initial revision.
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*
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*/
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