70fae724a7
data file rather than calculating it on the fly. Fixed polygon winding problem in scenery generation stage rather than compensating for it on the fly. Made a fgTILECACHE class.
173 lines
5 KiB
C++
173 lines
5 KiB
C++
// tilecache.hxx -- 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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#ifndef _TILECACHE_HXX
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#define _TILECACHE_HXX
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#ifndef __cplusplus
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# error This library requires C++
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#endif
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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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 <Bucket/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 >= (o->tile_diameter + 1) ** 2
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#define FG_TILE_CACHE_SIZE 121
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// Tile cache record
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typedef struct {
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struct fgBUCKET tile_bucket;
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GLint display_list;
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fgCartesianPoint3d 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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} fgTILE;
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// A class to store and manage a pile of tiles
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class fgTILECACHE {
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// cache storage space
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fgTILE tile_cache[FG_TILE_CACHE_SIZE];
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public:
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// Constructor
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fgTILECACHE( void );
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// Initialize the tile cache subsystem
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void Init( void );
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// Search for the specified "bucket" in the cache
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int Exists( struct fgBUCKET *p );
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// Return index of next available slot in tile cache
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int NextAvail( void );
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// Free a tile cache entry
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void fgTILECACHE::EntryFree( int index );
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// Fill in a tile cache entry with real data for the specified bucket
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void EntryFillIn( int index, struct fgBUCKET *p );
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// Return info for a tile cache entry
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void EntryInfo( int index, GLint *display_list,
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fgCartesianPoint3d *local_ref, double *radius );
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// Destructor
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~fgTILECACHE( void );
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};
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// the tile cache
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extern fgTILECACHE global_tile_cache;
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#endif // _TILECACHE_HXX
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// $Log$
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// Revision 1.8 1998/05/20 20:53:54 curt
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// Moved global ref point and radius (bounding sphere info, and offset) to
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// data file rather than calculating it on the fly.
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// Fixed polygon winding problem in scenery generation stage rather than
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// compensating for it on the fly.
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// Made a fgTILECACHE class.
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//
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// Revision 1.7 1998/05/16 13:09:57 curt
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// Beginning to add support for view frustum culling.
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// Added some temporary code to calculate bouding radius, until the
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// scenery generation tools and scenery can be updated.
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//
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// Revision 1.6 1998/05/07 23:15:20 curt
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// Fixed a glTexImage2D() usage bug where width and height were mis-swapped.
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// Added support for --tile-radius=n option.
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//
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// Revision 1.5 1998/05/02 01:52:17 curt
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// Playing around with texture coordinates.
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//
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// Revision 1.4 1998/04/30 12:35:31 curt
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// Added a command line rendering option specify smooth/flat shading.
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//
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// Revision 1.3 1998/04/25 22:06:32 curt
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// Edited cvs log messages in source files ... bad bad bad!
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//
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// Revision 1.2 1998/04/24 00:51:08 curt
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// Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
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// Tweaked the scenery file extentions to be "file.obj" (uncompressed)
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// or "file.obz" (compressed.)
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//
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// Revision 1.1 1998/04/22 13:22:47 curt
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// C++ - ifing the code a bit.
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//
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// Revision 1.10 1998/04/21 17:02:45 curt
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// Prepairing for C++ integration.
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//
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// Revision 1.9 1998/04/14 02:23:17 curt
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// Code reorganizations. Added a Lib/ directory for more general libraries.
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//
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// Revision 1.8 1998/04/08 23:30:08 curt
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// Adopted Gnu automake/autoconf system.
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//
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// Revision 1.7 1998/04/03 22:11:38 curt
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// Converting to Gnu autoconf system.
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//
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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 <pbleisch@acm.org> 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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