123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
/**************************************************************************
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* tilecache.c -- routines to hancle 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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#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 <Scenery/obj.h>
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#include <Scenery/tilecache.h>
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#include <Include/general.h>
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/* tile cache */
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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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int i;
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printf("Initializing the tile cache.\n");
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for ( i = 0; i < FG_TILE_CACHE_SIZE; i++ ) {
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tile_cache[i].used = 0;
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}
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}
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/* Return index of next available slot in tile cache */
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int fgTileCacheNextAvail( void ) {
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int i;
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for ( i = 0; i < FG_TILE_CACHE_SIZE; i++ ) {
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if ( tile_cache[i].used == 0 ) {
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return(i);
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}
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}
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return(-1);
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}
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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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struct fgGENERAL *g;
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char base_path[256];
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char file_name[256];
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g = &general;
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/* Mark this cache entry as used */
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tile_cache[index].used = 1;
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/* Update the bucket */
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tile_cache[index].tile_bucket.lon = p->lon;
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tile_cache[index].tile_bucket.lat = p->lat;
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tile_cache[index].tile_bucket.x = p->x;
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tile_cache[index].tile_bucket.y = p->y;
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/* Load the appropriate area and get the display list pointer */
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fgBucketGenBasePath(p, base_path);
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sprintf(file_name, "%s/Scenery/%s/%ld.obj", g->root_dir,
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base_path, fgBucketGenIndex(p));
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tile_cache[index].display_list =
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fgObjLoad(file_name, &tile_cache[index].local_ref);
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}
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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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*display_list = tile_cache[index].display_list;
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/* printf("Display list = %d\n", *display_list); */
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local_ref->x = tile_cache[index].local_ref.x;
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local_ref->y = tile_cache[index].local_ref.y;
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local_ref->z = tile_cache[index].local_ref.z;
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}
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/* Free the specified cache entry
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void fgTileCacheEntryFree( in index ) {
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}
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*/
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/* $Log$
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/* Revision 1.2 1998/01/26 15:55:24 curt
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/* Progressing on building dynamic scenery system.
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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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