1 /**************************************************************************
2 * views.h -- data structures and routines for managing and view parameters.
4 * Written by Curtis Olson, started August 1997.
6 * Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * (Log is kept at end of this file)
24 **************************************************************************/
31 #include <Include/types.h>
32 #include <Flight/flight.h>
33 #include <Math/mat3.h>
34 #include <Time/fg_time.h>
37 /* Define a structure containing view information */
39 /* view position translated to scenery.center */
40 struct fgCartesianPoint view_pos;
42 /* cartesion coordinates of current lon/lat if at sea level
43 * translated to scenery.center*/
44 struct fgCartesianPoint cur_zero_elev;
46 /* vector in cartesian coordinates from current position to the
47 * postion on the earth's surface the sun is directly over */
50 /* surface direction to go to head towards sun */
51 MAT3vec surface_to_sun;
53 /* surface vector heading south */
54 MAT3vec surface_south;
56 /* surface vector heading east (used to unambiguously align sky with sun) */
59 /* local up vector (normal to the plane tangent to the earth's
60 * surface at the spot we are directly above */
63 /* up vector for the view (usually point straight up through the
64 * top of the aircraft */
67 /* the vector pointing straight out the nose of the aircraft */
70 /* the current offset from forward for viewing */
73 /* the goal view offset for viewing (used for smooth view changes) */
74 double goal_view_offset;
78 extern struct fgVIEW current_view;
81 /* Initialize a view structure */
82 void fgViewInit(struct fgVIEW *v);
84 /* Update the view parameters */
85 void fgViewUpdate(struct fgFLIGHT *f, struct fgVIEW *v, struct fgLIGHT *l);
92 /* Revision 1.7 1998/01/22 02:59:38 curt
93 /* Changed #ifdef FILE_H to #ifdef _FILE_H
95 * Revision 1.6 1998/01/19 19:27:10 curt
96 * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
97 * This should simplify things tremendously.
99 * Revision 1.5 1997/12/22 04:14:32 curt
100 * Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
102 * Revision 1.4 1997/12/17 23:13:36 curt
103 * Began working on rendering a sky.
105 * Revision 1.3 1997/12/15 23:54:51 curt
106 * Add xgl wrappers for debugging.
107 * Generate terrain normals on the fly.
109 * Revision 1.2 1997/12/10 22:37:48 curt
110 * Prepended "fg" on the name of all global structures that didn't have it yet.
111 * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
113 * Revision 1.1 1997/08/27 21:31:18 curt