113 lines
3.4 KiB
C
113 lines
3.4 KiB
C
/**************************************************************************
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* views.h -- data structures and routines for managing and view parameters.
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*
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* Written by Curtis Olson, started August 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 VIEWS_H
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#define VIEWS_H
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#include <Include/types.h>
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#include <Flight/flight.h>
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#include <Math/mat3.h>
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#include <Time/fg_time.h>
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/* Define a structure containing view information */
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struct fgVIEW {
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/* view position translated to scenery.center */
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struct fgCartesianPoint view_pos;
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/* cartesion coordinates of current lon/lat if at sea level
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* translated to scenery.center*/
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struct fgCartesianPoint cur_zero_elev;
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/* vector in cartesian coordinates from current position to the
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* postion on the earth's surface the sun is directly over */
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MAT3vec to_sun;
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/* surface direction to go to head towards sun */
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MAT3vec surface_to_sun;
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/* surface vector heading south */
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MAT3vec surface_south;
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/* surface vector heading east (used to unambiguously align sky with sun) */
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MAT3vec surface_east;
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/* local up vector (normal to the plane tangent to the earth's
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* surface at the spot we are directly above */
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MAT3vec local_up;
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/* up vector for the view (usually point straight up through the
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* top of the aircraft */
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MAT3vec view_up;
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/* the vector pointing straight out the nose of the aircraft */
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MAT3vec view_forward;
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/* the current offset from forward for viewing */
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double view_offset;
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/* the goal view offset for viewing (used for smooth view changes) */
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double goal_view_offset;
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};
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extern struct fgVIEW current_view;
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/* Initialize a view structure */
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void fgViewInit(struct fgVIEW *v);
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/* Update the view parameters */
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void fgViewUpdate(struct fgFLIGHT *f, struct fgVIEW *v, struct fgLIGHT *l);
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#endif /* VIEWS_H */
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/* $Log$
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/* Revision 1.6 1998/01/19 19:27:10 curt
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/* Merged in make system changes from Bob Kuehne <rpk@sgi.com>
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/* This should simplify things tremendously.
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/*
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* Revision 1.5 1997/12/22 04:14:32 curt
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* Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
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*
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* Revision 1.4 1997/12/17 23:13:36 curt
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* Began working on rendering a sky.
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*
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* Revision 1.3 1997/12/15 23:54:51 curt
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* Add xgl wrappers for debugging.
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* Generate terrain normals on the fly.
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*
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* Revision 1.2 1997/12/10 22:37:48 curt
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* Prepended "fg" on the name of all global structures that didn't have it yet.
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* i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
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*
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* Revision 1.1 1997/08/27 21:31:18 curt
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* Initial revision.
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*
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*/
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