120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
/**************************************************************************
|
|
* views.h -- data structures and routines for managing and view parameters.
|
|
*
|
|
* Written by Curtis Olson, started August 1997.
|
|
*
|
|
* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* $Id$
|
|
* (Log is kept at end of this file)
|
|
**************************************************************************/
|
|
|
|
|
|
#ifndef _VIEWS_H
|
|
#define _VIEWS_H
|
|
|
|
|
|
#include <Include/fg_types.h>
|
|
#include <Flight/flight.h>
|
|
#include <Math/mat3.h>
|
|
#include <Time/fg_time.h>
|
|
|
|
|
|
/* Define a structure containing view information */
|
|
struct fgVIEW {
|
|
/* view position translated to scenery.center */
|
|
struct fgCartesianPoint view_pos;
|
|
|
|
/* cartesion coordinates of current lon/lat if at sea level
|
|
* translated to scenery.center*/
|
|
struct fgCartesianPoint cur_zero_elev;
|
|
|
|
/* vector in cartesian coordinates from current position to the
|
|
* postion on the earth's surface the sun is directly over */
|
|
MAT3vec to_sun;
|
|
|
|
/* surface direction to go to head towards sun */
|
|
MAT3vec surface_to_sun;
|
|
|
|
/* surface vector heading south */
|
|
MAT3vec surface_south;
|
|
|
|
/* surface vector heading east (used to unambiguously align sky with sun) */
|
|
MAT3vec surface_east;
|
|
|
|
/* local up vector (normal to the plane tangent to the earth's
|
|
* surface at the spot we are directly above */
|
|
MAT3vec local_up;
|
|
|
|
/* up vector for the view (usually point straight up through the
|
|
* top of the aircraft */
|
|
MAT3vec view_up;
|
|
|
|
/* the vector pointing straight out the nose of the aircraft */
|
|
MAT3vec view_forward;
|
|
|
|
/* the current offset from forward for viewing */
|
|
double view_offset;
|
|
|
|
/* the goal view offset for viewing (used for smooth view changes) */
|
|
double goal_view_offset;
|
|
};
|
|
|
|
|
|
extern struct fgVIEW current_view;
|
|
|
|
|
|
/* Initialize a view structure */
|
|
void fgViewInit(struct fgVIEW *v);
|
|
|
|
/* Update the view parameters */
|
|
void fgViewUpdate(struct fgFLIGHT *f, struct fgVIEW *v, struct fgLIGHT *l);
|
|
|
|
|
|
#endif /* _VIEWS_H */
|
|
|
|
|
|
/* $Log$
|
|
/* Revision 1.8 1998/01/27 00:47:58 curt
|
|
/* Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
|
|
/* system and commandline/config file processing code.
|
|
/*
|
|
* Revision 1.7 1998/01/22 02:59:38 curt
|
|
* Changed #ifdef FILE_H to #ifdef _FILE_H
|
|
*
|
|
* Revision 1.6 1998/01/19 19:27:10 curt
|
|
* Merged in make system changes from Bob Kuehne <rpk@sgi.com>
|
|
* This should simplify things tremendously.
|
|
*
|
|
* Revision 1.5 1997/12/22 04:14:32 curt
|
|
* Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
|
|
*
|
|
* Revision 1.4 1997/12/17 23:13:36 curt
|
|
* Began working on rendering a sky.
|
|
*
|
|
* Revision 1.3 1997/12/15 23:54:51 curt
|
|
* Add xgl wrappers for debugging.
|
|
* Generate terrain normals on the fly.
|
|
*
|
|
* Revision 1.2 1997/12/10 22:37:48 curt
|
|
* Prepended "fg" on the name of all global structures that didn't have it yet.
|
|
* i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
|
|
*
|
|
* Revision 1.1 1997/08/27 21:31:18 curt
|
|
* Initial revision.
|
|
*
|
|
*/
|