-/**************************************************************************
- * views.hxx -- 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)
- **************************************************************************/
+// views.hxx -- 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_HXX
#endif
-#include <Include/fg_types.h>
-#include <Flight/flight.h>
+#include <FDM/flight.hxx>
#include <Math/mat3.h>
+#include <Math/point3d.hxx>
#include <Time/fg_time.hxx>
#include <Time/light.hxx>
+#include "options.hxx"
-/* Define a structure containing view information */
-struct fgVIEW {
- /* absolute view position */
- struct fgCartesianPoint abs_view_pos;
- /* view position translated to scenery.center */
- struct fgCartesianPoint view_pos;
+// used in views.cxx and tilemgr.cxx
+#define USE_FAST_FOV_CLIP
- /* 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 */
+// Define a structure containing view information
+class FGView {
+
+public:
+
+ // 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;
+
+ // flag forcing update of fov related stuff
+ bool update_fov;
+
+ // fov of view is specified in the y direction, win_ratio is used to
+ // calculate the fov in the X direction = width/height
+ double win_ratio;
+
+ // width & height of window
+ int winWidth, winHeight;
+
+ // sin and cos of (fov / 2) in Y axis
+ double sin_fov_y, cos_fov_y;
+ double sinlon, coslon;
+
+ // slope of view frustum edge in eye space Y axis
+ double slope_y;
+
+ // sin and cos of (fov / 2) in X axis
+ double sin_fov_x, cos_fov_x;
+
+ // slope of view frustum edge in eye space X axis
+ double slope_x;
+
+#if defined( USE_FAST_FOV_CLIP )
+ double fov_x_clip, fov_y_clip;
+#endif // USE_FAST_FOV_CLIP
+
+ // View frustum cull ratio (% of tiles culled ... used for
+ // reporting purposes)
+ double vfc_ratio;
+
+ // Number of triangles rendered;
+ int tris_rendered;
+
+ // absolute view position
+ Point3D abs_view_pos;
+
+ // view position translated to scenery.center
+ Point3D view_pos;
+
+ // cartesion coordinates of current lon/lat if at sea level
+ // translated to scenery.center*/
+ Point3D 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 */
+ // surface direction to go to head towards sun
MAT3vec surface_to_sun;
- /* surface vector heading south */
+ // surface vector heading south
MAT3vec surface_south;
- /* surface vector heading east (used to unambiguously align sky with sun) */
+ // 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 */
+ // 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 */
+ // 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 */
+ // the vector pointing straight out the nose of the aircraft
MAT3vec view_forward;
- /* the current offset from forward for viewing */
- double view_offset;
+ // Transformation matrix for eye coordinates to aircraft coordinates
+ MAT3mat AIRCRAFT;
- /* the goal view offset for viewing (used for smooth view changes) */
- double goal_view_offset;
+ // Transformation matrix for the view direction offset relative to
+ // the AIRCRAFT matrix
+ MAT3mat VIEW_OFFSET;
+
+ // Transformation matrix for aircraft coordinates to world
+ // coordinates
+ MAT3mat WORLD;
+
+ // Combined transformation from eye coordinates to world coordinates
+ MAT3mat EYE_TO_WORLD;
+
+ // Inverse of EYE_TO_WORLD which is a transformation from world
+ // coordinates to eye coordinates
+ MAT3mat WORLD_TO_EYE;
+
+ // Current model view matrix;
+ GLdouble MODEL_VIEW[16];
+
+public:
+
+ // Constructor
+ FGView( void );
+
+ // Destructor
+ ~FGView( void );
+
+ // Initialize a view class
+ void Init( void );
+
+ // Basically, this is a modified version of the Mesa gluLookAt()
+ // function that's been modified slightly so we can capture the
+ // result (and use it later) otherwise this all gets calculated in
+ // OpenGL land and we don't have access to the results.
+ void LookAt( GLdouble eyex, GLdouble eyey, GLdouble eyez,
+ GLdouble centerx, GLdouble centery, GLdouble centerz,
+ GLdouble upx, GLdouble upy, GLdouble upz );
+
+ // Update the view volume, position, and orientation
+ void UpdateViewParams( void );
+
+ // Flag to request that UpdateFOV() be called next time
+ // UpdateViewMath() is run.
+ inline void force_update_fov_math() { update_fov = true; }
+
+ // Update the view parameters
+ void UpdateViewMath( FGInterface *f );
+
+ // Update the "World to Eye" transformation matrix
+ void UpdateWorldToEye( FGInterface *f );
+
+ // Update the field of view coefficients
+ void UpdateFOV( const fgOPTIONS& o );
+
+ // accessor functions
+ inline double get_view_offset() const { return view_offset; }
+ inline void set_view_offset( double a ) { view_offset = a; }
+ inline void inc_view_offset( double amt ) { view_offset += amt; }
+ inline double get_goal_view_offset() const { return goal_view_offset; }
+ inline void set_goal_view_offset( double a) { goal_view_offset = a; }
+ inline double get_win_ratio() const { return win_ratio; }
+ inline void set_win_ratio( double r ) { win_ratio = r; }
+ inline int get_winWidth() const { return winWidth; }
+ inline void set_winWidth( int w ) { winWidth = w; }
+ inline int get_winHeight() const { return winHeight; }
+ inline void set_winHeight( int h ) { winHeight = h; }
+ inline double get_slope_y() const { return slope_y; }
+ inline double get_slope_x() const { return slope_x; }
+#if defined( USE_FAST_FOV_CLIP )
+ inline double get_fov_x_clip() const { return fov_x_clip; }
+ inline double get_fov_y_clip() const { return fov_y_clip; }
+#endif // USE_FAST_FOV_CLIP
+ inline double get_vfc_ratio() const { return vfc_ratio; }
+ inline void set_vfc_ratio(double r) { vfc_ratio = r; }
+ inline int get_tris_rendered() const { return tris_rendered; }
+ inline void set_tris_rendered( int tris) { tris_rendered = tris; }
+ inline Point3D get_abs_view_pos() const { return abs_view_pos; }
+ inline Point3D get_view_pos() const { return view_pos; }
+ inline Point3D get_cur_zero_elev() const { return cur_zero_elev; }
+ inline double *get_to_sun() { return to_sun; }
+ inline void set_to_sun( double x, double y, double z) {
+ to_sun[0] = x;
+ to_sun[1] = y;
+ to_sun[2] = z;
+ }
+ inline double *get_surface_to_sun() { return surface_to_sun; }
+ inline void set_surface_to_sun( double x, double y, double z) {
+ surface_to_sun[0] = x;
+ surface_to_sun[1] = y;
+ surface_to_sun[2] = z;
+ }
+ inline double *get_surface_south() { return surface_south; }
+ inline double *get_surface_east() { return surface_east; }
+ inline double *get_local_up() { return local_up; }
+ inline const MAT3mat *get_WORLD_TO_EYE() const { return &WORLD_TO_EYE; }
+ inline GLdouble *get_MODEL_VIEW() { return MODEL_VIEW; }
};
-extern struct fgVIEW current_view;
-
-
-/* Initialize a view structure */
-void fgViewInit(struct fgVIEW *v);
-
-/* Update the view parameters */
-void fgViewUpdate(fgFLIGHT *f, struct fgVIEW *v, fgLIGHT *l);
-
-
-#endif /* _VIEWS_HXX */
-
-
-/* $Log$
-/* Revision 1.2 1998/04/24 00:49:22 curt
-/* Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
-/* Trying out some different option parsing code.
-/* Some code reorganization.
-/*
- * Revision 1.1 1998/04/22 13:25:46 curt
- * C++ - ifing the code.
- * Starting a bit of reorganization of lighting code.
- *
- * Revision 1.11 1998/04/21 17:02:42 curt
- * Prepairing for C++ integration.
- *
- * Revision 1.10 1998/02/07 15:29:45 curt
- * Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
- * <chotchkiss@namg.us.anritsu.com>
- *
- * Revision 1.9 1998/01/29 00:50:29 curt
- * Added a view record field for absolute x, y, z position.
- *
- * 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.
- *
- */
+extern FGView current_view;
+
+
+#endif // _VIEWS_HXX
+
+
+// $Log$
+// Revision 1.21 1999/02/05 21:29:15 curt
+// Modifications to incorporate Jon S. Berndts flight model code.
+//
+// Revision 1.20 1999/02/02 20:13:38 curt
+// MSVC++ portability changes by Bernie Bright:
+//
+// Lib/Serial/serial.[ch]xx: Initial Windows support - incomplete.
+// Simulator/Astro/stars.cxx: typo? included <stdio> instead of <cstdio>
+// Simulator/Cockpit/hud.cxx: Added Standard headers
+// Simulator/Cockpit/panel.cxx: Redefinition of default parameter
+// Simulator/Flight/flight.cxx: Replaced cout with FG_LOG. Deleted <stdio.h>
+// Simulator/Main/fg_init.cxx:
+// Simulator/Main/GLUTmain.cxx:
+// Simulator/Main/options.hxx: Shuffled <fg_serial.hxx> dependency
+// Simulator/Objects/material.hxx:
+// Simulator/Time/timestamp.hxx: VC++ friend kludge
+// Simulator/Scenery/tile.[ch]xx: Fixed using std::X declarations
+// Simulator/Main/views.hxx: Added a constant
+//
+// Revision 1.19 1999/02/01 21:33:36 curt
+// Renamed FlightGear/Simulator/Flight to FlightGear/Simulator/FDM since
+// Jon accepted my offer to do this and thought it was a good idea.
+//
+// Revision 1.18 1998/12/11 20:26:30 curt
+// Fixed view frustum culling accuracy bug so we can look out the sides and
+// back without tri-stripes dropping out.
+//
+// Revision 1.17 1998/12/09 18:50:29 curt
+// Converted "class fgVIEW" to "class FGView" and updated to make data
+// members private and make required accessor functions.
+//
+// Revision 1.16 1998/12/05 15:54:25 curt
+// Renamed class fgFLIGHT to class FGState as per request by JSB.
+//
+// Revision 1.15 1998/10/16 23:27:56 curt
+// C++-ifying.
+//
+// Revision 1.14 1998/10/16 00:54:04 curt
+// Converted to Point3D class.
+//
+// Revision 1.13 1998/09/08 15:04:36 curt
+// Optimizations by Norman Vine.
+//
+// Revision 1.12 1998/08/24 20:11:15 curt
+// Added i/I to toggle full vs. minimal HUD.
+// Added a --hud-tris vs --hud-culled option.
+// Moved options accessor funtions to options.hxx.
+//
+// Revision 1.11 1998/08/20 20:32:35 curt
+// Reshuffled some of the code in and around views.[ch]xx
+//
+// Revision 1.10 1998/07/08 14:45:09 curt
+// polar3d.h renamed to polar3d.hxx
+// vector.h renamed to vector.hxx
+// updated audio support so it waits to create audio classes (and tie up
+// /dev/dsp) until the mpg123 player is finished.
+//
+// Revision 1.9 1998/07/04 00:52:27 curt
+// Add my own version of gluLookAt() (which is nearly identical to the
+// Mesa/glu version.) But, by calculating the Model View matrix our selves
+// we can save this matrix without having to read it back in from the video
+// card. This hopefully allows us to save a few cpu cycles when rendering
+// out the fragments because we can just use glLoadMatrixd() with the
+// precalculated matrix for each tile rather than doing a push(), translate(),
+// pop() for every fragment.
+//
+// Panel status defaults to off for now until it gets a bit more developed.
+//
+// Extract OpenGL driver info on initialization.
+//
+// Revision 1.8 1998/05/27 02:24:06 curt
+// View optimizations by Norman Vine.
+//
+// Revision 1.7 1998/05/17 16:59:04 curt
+// First pass at view frustum culling now operational.
+//
+// Revision 1.6 1998/05/16 13:08:37 curt
+// C++ - ified views.[ch]xx
+// Shuffled some additional view parameters into the fgVIEW class.
+// Changed tile-radius to tile-diameter because it is a much better
+// name.
+// Added a WORLD_TO_EYE transformation to views.cxx. This allows us
+// to transform world space to eye space for view frustum culling.
+//
+// Revision 1.5 1998/05/02 01:51:02 curt
+// Updated polartocart conversion routine.
+//
+// Revision 1.4 1998/04/28 01:20:24 curt
+// Type-ified fgTIME and fgVIEW.
+// Added a command line option to disable textures.
+//
+// Revision 1.3 1998/04/25 22:06:31 curt
+// Edited cvs log messages in source files ... bad bad bad!
+//
+// Revision 1.2 1998/04/24 00:49:22 curt
+// Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
+// Trying out some different option parsing code.
+// Some code reorganization.
+//
+// Revision 1.1 1998/04/22 13:25:46 curt
+// C++ - ifing the code.
+// Starting a bit of reorganization of lighting code.
+//
+// Revision 1.11 1998/04/21 17:02:42 curt
+// Prepairing for C++ integration.
+//
+// Revision 1.10 1998/02/07 15:29:45 curt
+// Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
+// <chotchkiss@namg.us.anritsu.com>
+//
+// Revision 1.9 1998/01/29 00:50:29 curt
+// Added a view record field for absolute x, y, z position.
+//
+// Revision 1.8 1998/01/27 00:47:58 curt
+// Incorporated Paul Bleisch's <pbleisch@acm.org> 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.
+//
projects / flightgear.git / blobdiff