dd4a17a011
between sun position, lighting, and view position. This creates a valid single pass initialization path.
244 lines
8.4 KiB
C++
244 lines
8.4 KiB
C++
//
|
|
// views.cxx -- 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)
|
|
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <Debug/fg_debug.h>
|
|
#include <Flight/flight.h>
|
|
#include <Include/fg_constants.h>
|
|
#include <Math/mat3.h>
|
|
#include <Math/polar.h>
|
|
#include <Math/vector.h>
|
|
#include <Scenery/scenery.h>
|
|
#include <Time/fg_time.hxx>
|
|
|
|
#include "views.hxx"
|
|
|
|
|
|
// This is a record containing current view parameters
|
|
struct fgVIEW current_view;
|
|
|
|
|
|
// Initialize a view structure
|
|
void fgViewInit(struct fgVIEW *v) {
|
|
fgPrintf( FG_VIEW, FG_INFO, "Initializing View parameters\n");
|
|
|
|
v->view_offset = 0.0;
|
|
v->goal_view_offset = 0.0;
|
|
}
|
|
|
|
|
|
// Update the view parameters
|
|
void fgViewUpdate(fgFLIGHT *f, struct fgVIEW *v, fgLIGHT *l) {
|
|
MAT3vec vec, forward, v0, minus_z;
|
|
MAT3mat R, TMP, UP, LOCAL, VIEW;
|
|
double ntmp;
|
|
|
|
scenery.center.x = scenery.next_center.x;
|
|
scenery.center.y = scenery.next_center.y;
|
|
scenery.center.z = scenery.next_center.z;
|
|
|
|
// calculate the cartesion coords of the current lat/lon/0 elev
|
|
v->cur_zero_elev = fgPolarToCart(FG_Longitude, FG_Lat_geocentric,
|
|
FG_Sea_level_radius * FEET_TO_METER);
|
|
v->cur_zero_elev.x -= scenery.center.x;
|
|
v->cur_zero_elev.y -= scenery.center.y;
|
|
v->cur_zero_elev.z -= scenery.center.z;
|
|
|
|
// calculate view position in current FG view coordinate system
|
|
v->abs_view_pos = fgPolarToCart(FG_Longitude, FG_Lat_geocentric,
|
|
FG_Radius_to_vehicle * FEET_TO_METER + 1.0);
|
|
v->view_pos.x = v->abs_view_pos.x - scenery.center.x;
|
|
v->view_pos.y = v->abs_view_pos.y - scenery.center.y;
|
|
v->view_pos.z = v->abs_view_pos.z - scenery.center.z;
|
|
|
|
fgPrintf( FG_VIEW, FG_DEBUG, "Absolute view pos = %.4f, %.4f, %.4f\n",
|
|
v->abs_view_pos.x, v->abs_view_pos.y, v->abs_view_pos.z);
|
|
fgPrintf( FG_VIEW, FG_DEBUG, "Relative view pos = %.4f, %.4f, %.4f\n",
|
|
v->view_pos.x, v->view_pos.y, v->view_pos.z);
|
|
|
|
// Derive the LOCAL aircraft rotation matrix (roll, pitch, yaw)
|
|
MAT3_SET_VEC(vec, 0.0, 0.0, 1.0);
|
|
MAT3rotate(R, vec, FG_Phi);
|
|
// printf("Roll matrix\n");
|
|
// MAT3print(R, stdout);
|
|
|
|
MAT3_SET_VEC(vec, 0.0, 1.0, 0.0);
|
|
// MAT3mult_vec(vec, vec, R);
|
|
MAT3rotate(TMP, vec, FG_Theta);
|
|
// printf("Pitch matrix\n");
|
|
// MAT3print(TMP, stdout);
|
|
MAT3mult(R, R, TMP);
|
|
|
|
MAT3_SET_VEC(vec, 1.0, 0.0, 0.0);
|
|
// MAT3mult_vec(vec, vec, R);
|
|
// MAT3rotate(TMP, vec, FG_Psi - FG_PI_2);
|
|
MAT3rotate(TMP, vec, -FG_Psi);
|
|
// printf("Yaw matrix\n");
|
|
// MAT3print(TMP, stdout);
|
|
MAT3mult(LOCAL, R, TMP);
|
|
// printf("LOCAL matrix\n");
|
|
// MAT3print(LOCAL, stdout);
|
|
|
|
// Derive the local UP transformation matrix based on *geodetic*
|
|
// coordinates
|
|
MAT3_SET_VEC(vec, 0.0, 0.0, 1.0);
|
|
MAT3rotate(R, vec, FG_Longitude); // R = rotate about Z axis
|
|
// printf("Longitude matrix\n");
|
|
// MAT3print(R, stdout);
|
|
|
|
MAT3_SET_VEC(vec, 0.0, 1.0, 0.0);
|
|
MAT3mult_vec(vec, vec, R);
|
|
MAT3rotate(TMP, vec, -FG_Latitude); // TMP = rotate about X axis
|
|
// printf("Latitude matrix\n");
|
|
// MAT3print(TMP, stdout);
|
|
|
|
MAT3mult(UP, R, TMP);
|
|
// printf("Local up matrix\n");
|
|
// MAT3print(UP, stdout);
|
|
|
|
MAT3_SET_VEC(v->local_up, 1.0, 0.0, 0.0);
|
|
MAT3mult_vec(v->local_up, v->local_up, UP);
|
|
|
|
// printf( "Local Up = (%.4f, %.4f, %.4f)\n",
|
|
// v->local_up[0], v->local_up[1], v->local_up[2]);
|
|
|
|
// Alternative method to Derive local up vector based on
|
|
// *geodetic* coordinates
|
|
// alt_up = fgPolarToCart(FG_Longitude, FG_Latitude, 1.0);
|
|
// printf( " Alt Up = (%.4f, %.4f, %.4f)\n",
|
|
// alt_up.x, alt_up.y, alt_up.z);
|
|
|
|
// Calculate the VIEW matrix
|
|
MAT3mult(VIEW, LOCAL, UP);
|
|
// printf("VIEW matrix\n");
|
|
// MAT3print(VIEW, stdout);
|
|
|
|
// generate the current up, forward, and fwrd-view vectors
|
|
MAT3_SET_VEC(vec, 1.0, 0.0, 0.0);
|
|
MAT3mult_vec(v->view_up, vec, VIEW);
|
|
|
|
MAT3_SET_VEC(vec, 0.0, 0.0, 1.0);
|
|
MAT3mult_vec(forward, vec, VIEW);
|
|
// printf( "Forward vector is (%.2f,%.2f,%.2f)\n", forward[0], forward[1],
|
|
// forward[2]);
|
|
|
|
MAT3rotate(TMP, v->view_up, v->view_offset);
|
|
MAT3mult_vec(v->view_forward, forward, TMP);
|
|
|
|
// make a vector to the current view position
|
|
MAT3_SET_VEC(v0, v->view_pos.x, v->view_pos.y, v->view_pos.z);
|
|
|
|
// Given a vector pointing straight down (-Z), map into onto the
|
|
// local plane representing "horizontal". This should give us the
|
|
// local direction for moving "south".
|
|
MAT3_SET_VEC(minus_z, 0.0, 0.0, -1.0);
|
|
map_vec_onto_cur_surface_plane(v->local_up, v0, minus_z, v->surface_south);
|
|
MAT3_NORMALIZE_VEC(v->surface_south, ntmp);
|
|
// printf( "Surface direction directly south %.2f %.2f %.2f\n",
|
|
// v->surface_south[0], v->surface_south[1], v->surface_south[2]);
|
|
|
|
// now calculate the surface east vector
|
|
MAT3rotate(TMP, v->view_up, FG_PI_2);
|
|
MAT3mult_vec(v->surface_east, v->surface_south, TMP);
|
|
// printf( "Surface direction directly east %.2f %.2f %.2f\n",
|
|
// v->surface_east[0], v->surface_east[1], v->surface_east[2]);
|
|
// printf( "Should be close to zero = %.2f\n",
|
|
// MAT3_DOT_PRODUCT(v->surface_south, v->surface_east));
|
|
}
|
|
|
|
|
|
// $Log$
|
|
// Revision 1.3 1998/04/25 20:24:02 curt
|
|
// Cleaned up initialization sequence to eliminate interdependencies
|
|
// between sun position, lighting, and view position. This creates a
|
|
// valid single pass initialization path.
|
|
//
|
|
// 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 13:25:45 curt
|
|
// C++ - ifing the code.
|
|
// Starting a bit of reorganization of lighting code.
|
|
//
|
|
// Revision 1.16 1998/04/18 04:11:29 curt
|
|
// Moved fg_debug to it's own library, added zlib support.
|
|
//
|
|
// Revision 1.15 1998/02/20 00:16:24 curt
|
|
// Thursday's tweaks.
|
|
//
|
|
// Revision 1.14 1998/02/09 15:07:50 curt
|
|
// Minor tweaks.
|
|
//
|
|
// Revision 1.13 1998/02/07 15:29:45 curt
|
|
// Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
|
|
// <chotchkiss@namg.us.anritsu.com>
|
|
//
|
|
// Revision 1.12 1998/01/29 00:50:28 curt
|
|
// Added a view record field for absolute x, y, z position.
|
|
//
|
|
// Revision 1.11 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 1.10 1998/01/19 19:27:09 curt
|
|
// Merged in make system changes from Bob Kuehne <rpk@sgi.com>
|
|
// This should simplify things tremendously.
|
|
//
|
|
// Revision 1.9 1998/01/13 00:23:09 curt
|
|
// Initial changes to support loading and management of scenery tiles. Note,
|
|
// there's still a fair amount of work left to be done.
|
|
//
|
|
// Revision 1.8 1997/12/30 22:22:33 curt
|
|
// Further integration of event manager.
|
|
//
|
|
// Revision 1.7 1997/12/30 20:47:45 curt
|
|
// Integrated new event manager with subsystem initializations.
|
|
//
|
|
// Revision 1.6 1997/12/22 04:14:32 curt
|
|
// Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
|
|
//
|
|
// Revision 1.5 1997/12/18 04:07:02 curt
|
|
// Worked on properly translating and positioning the sky dome.
|
|
//
|
|
// Revision 1.4 1997/12/17 23:13:36 curt
|
|
// Began working on rendering a sky.
|
|
//
|
|
// Revision 1.3 1997/12/15 23:54:50 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 21:31:17 curt
|
|
// Initial revision.
|
|
//
|