74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
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/**************************************************************************
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* chunkmgr.h -- top level scenery chunk management system.
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*
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* Written by Curtis Olson, started July 1997.
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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 CHUNKMGR_H
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#define CHUNKMGR_H
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#include "mesh.h"
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#define MAX_CHUNK_LIST 1000
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#define MAX_CHUNK_CACHE 100
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struct chunk {
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/* path name to the data file for this chunk */
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char path[1024];
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/* coordinates (in arc seconds) */
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double lon, lat;
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/* coordinates (cartesian, units = km) */
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double x, y, z;
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/* last calculated distance from current viewpoint */
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double dist;
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/* pointer to elevation grid array for this chunk*/
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struct mesh *terrain_ptr;
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};
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/* initialize the chunk management system */
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void chunk_init();
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/* load all chunks within radius distance of the specified point if
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* they are not already loaded or cached. Remove or cache any chunks that are
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* out of range. */
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void chunk_update(double lat, double lon, double radius);
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#endif /* CHUNKMGR_H */
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/* $Log$
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/* Revision 1.1 1997/07/31 23:19:34 curt
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/* Initial revision.
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/*
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*/
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