1 /**************************************************************************
4 * Written 1998 by Durk Talsma, started Juni, 1998. For the flight gear
7 * Additional mouse supported added by David Megginson, 1999.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of the
12 * License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 **************************************************************************/
31 #include <simgear/compiler.h>
33 #ifdef FG_MATH_EXCEPTION_CLASH
42 #include <simgear/xgl/xgl.h>
44 #if defined(FX) && defined(XMESA)
45 # include <GL/xmesa.h>
54 #include <simgear/constants.h>
55 #include <simgear/debug/logstream.hxx>
56 #include <simgear/misc/fgpath.hxx>
57 #include <simgear/screen/screen-dump.hxx>
59 #include <Include/general.hxx>
60 #include <Aircraft/aircraft.hxx>
61 #include <Airports/simple.hxx>
62 #include <Autopilot/auto_gui.hxx>
63 #include <Autopilot/newauto.hxx>
64 #include <Cockpit/panel.hxx>
65 #include <Controls/controls.hxx>
66 #include <FDM/flight.hxx>
67 #include <Main/options.hxx>
68 #include <Main/fg_init.hxx>
69 #include <Main/views.hxx>
70 #include <Main/save.hxx>
71 #include <Main/bfi.hxx>
73 #include <NetworkOLK/network.h>
76 #if defined( WIN32 ) && !defined( __CYGWIN__ )
77 # include <simgear/screen/win32-printer.h>
78 # include <simgear/screen/GlBitmaps.h>
83 * A virtual trackball implementation
84 * Written by Gavin Bell for Silicon Graphics, November 1988.
87 * Pass the x and y coordinates of the last and current positions of
88 * the mouse, scaled so they are from (-1.0 ... 1.0).
90 * The resulting rotation is returned as a quaternion rotation in the
94 trackball(float q[4], float p1x, float p1y, float p2x, float p2y);
97 * Given two quaternions, add them together to get a third quaternion.
98 * Adding quaternions to get a compound rotation is analagous to adding
99 * translations to get a compound translation. When incrementally
100 * adding rotations, the first argument here should be the new
102 * rotation, the second and third the total rotation (which will be
103 * over-written with the resulting new total rotation).
106 add_quats(float *q1, float *q2, float *dest);
109 * A useful function, builds a rotation matrix in Matrix based on
113 build_rotmatrix(float m[4][4], float q[4]);
116 * This function computes a quaternion based on an axis (defined by
117 * the given vector) and an angle about which to rotate. The angle is
118 * expressed in radians. The result is put into the third argument.
121 axis_to_quat(float a[3], float phi, float q[4]);
126 FG_USING_STD(string);
128 #ifndef FG_HAVE_NATIVE_SGI_COMPILERS
132 #if defined(WIN32) || defined(__CYGWIN32__)
133 #define WIN32_CURSOR_TWEAKS
134 #elif (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
135 #define X_CURSOR_TWEAKS
138 // hack, should come from an include someplace
139 extern void fgInitVisuals( void );
140 extern void fgReshape( int width, int height );
141 extern void fgRenderFrame( void );
144 fntTexFont *guiFntHandle = 0;
146 static puMenuBar *mainMenuBar = 0;
147 //static puButton *hideMenuButton = 0;
149 static puDialogBox *dialogBox = 0;
150 static puFrame *dialogFrame = 0;
151 static puText *dialogBoxMessage = 0;
152 static puOneShot *dialogBoxOkButton = 0;
155 static puDialogBox *YNdialogBox = 0;
156 static puFrame *YNdialogFrame = 0;
157 static puText *YNdialogBoxMessage = 0;
158 static puOneShot *YNdialogBoxOkButton = 0;
159 static puOneShot *YNdialogBoxNoButton = 0;
161 static char msg_OK[] = "OK";
162 static char msg_NO[] = "NO";
163 static char msg_YES[] = "YES";
164 static char msg_CANCEL[] = "Cancel";
165 static char msg_RESET[] = "Reset";
167 char *gui_msg_OK; // "OK"
168 char *gui_msg_NO; // "NO"
169 char *gui_msg_YES; // "YES"
170 char *gui_msg_CANCEL; // "CANCEL"
171 char *gui_msg_RESET; // "RESET"
173 static char global_dialog_string[256];
175 // from autopilot.cxx
176 // extern void NewAltitude( puObject *cb );
177 // extern void NewHeading( puObject *cb );
178 // extern void fgAPAdjust( puObject * );
179 // extern void NewTgtAirport( puObject *cb );
180 // bool fgAPTerrainFollowEnabled( void );
181 // bool fgAPAltitudeEnabled( void );
182 // bool fgAPHeadingEnabled( void );
183 // bool fgAPWayPointEnabled( void );
184 // bool fgAPAutoThrottleEnabled( void );
187 extern void fgLatLonFormatToggle( puObject *);
189 /* --------------------------------------------------------------------
191 ---------------------------------------------------------------------*/
195 static int _savedX = 0;
196 static int _savedY = 0;
197 static int last_buttons = 0 ;
198 static int mouse_active = 0;
199 static int menu_on = 0;
200 static int mouse_joystick_control = 0;
202 //static time_t mouse_off_time;
203 //static int mouse_timed_out;
205 // to allow returning to previous view
206 // on second left click in MOUSE_VIEW mode
207 // This has file scope so that it can be reset
208 // if the little rodent is moved NHV
209 static int _mVtoggle;
211 // we break up the glutGetModifiers return mask
212 // once per loop and stash what we need in these
213 static int glut_active_shift;
214 static int glut_active_ctrl;
215 static int glut_active_alt;
217 static float lastquat[4];
218 static float curquat[4];
219 static float _quat0[4];
220 float quat_mat[4][4];
222 // uncomment this for view to exactly follow mouse in MOUSE_VIEW mode
223 // else smooth out the view panning to .01 radian per frame
224 // see view_offset smoothing mechanism in main.cxx
225 #define NO_SMOOTH_MOUSE_VIEW
227 // uncomment following to
228 #define RESET_VIEW_ON_LEAVING_MOUSE_VIEW
230 /* --------------------------------------------------------------------
231 Support for mouse as control yoke (david@megginson.com)
233 - right button toggles between pointer and yoke
234 - horizontal drag with no buttons moves ailerons
235 - vertical drag with no buttons moves elevators
236 - horizontal drag with left button moves brakes (left=on)
237 - vertical drag with left button moves throttle (up=more)
238 - horizontal drag with middle button moves rudder
239 - vertical drag with middle button moves trim
241 For the *_sensitivity variables, a lower number means more sensitive.
243 TODO: figure out how to keep pointer from leaving window in yoke mode.
244 TODO: add thresholds and null zones
245 TODO: sensitivity should be configurable at user option.
246 TODO: allow differential braking (this will be useful if FlightGear
247 ever supports tail-draggers like the DC-3)
248 ---------------------------------------------------------------------*/
256 MouseMode mouse_mode = MOUSE_POINTER;
258 static double aileron_sensitivity = 1.0/500.0;
259 static double elevator_sensitivity = 1.0/500.0;
260 static double brake_sensitivity = 1.0/250.0;
261 static double throttle_sensitivity = 1.0/250.0;
262 static double rudder_sensitivity = 1.0/500.0;
263 static double trim_sensitivity = 1.0/1000.0;
265 static inline void Quat0( void ) {
266 curquat[0] = _quat0[0];
267 curquat[1] = _quat0[1];
268 curquat[2] = _quat0[2];
269 curquat[3] = _quat0[3];
272 static inline int left_button( void ) {
273 return( last_buttons & (1 << GLUT_LEFT_BUTTON) );
276 static inline int middle_button( void ) {
277 return( last_buttons & (1 << GLUT_MIDDLE_BUTTON) );
280 static inline int right_button( void ) {
281 return( last_buttons & (1 << GLUT_RIGHT_BUTTON) );
284 static inline void TurnCursorOn( void )
287 #if defined(WIN32_CURSOR_TWEAKS)
288 switch (mouse_mode) {
290 glutSetCursor(GLUT_CURSOR_INHERIT);
293 glutSetCursor(GLUT_CURSOR_CROSSHAIR);
296 glutSetCursor(GLUT_CURSOR_LEFT_RIGHT);
300 #if defined(X_CURSOR_TWEAKS)
301 glutWarpPointer( current_view.get_winWidth()/2, current_view.get_winHeight()/2);
305 static inline void TurnCursorOff( void )
308 #if defined(WIN32_CURSOR_TWEAKS)
309 glutSetCursor(GLUT_CURSOR_NONE);
310 #elif defined(X_CURSOR_TWEAKS)
311 glutWarpPointer( current_view.get_winWidth(), current_view.get_winHeight());
315 void maybeToggleMouse( void )
317 #if defined(WIN32_CURSOR_TWEAKS)
318 static int first_time = ~0;
319 static int mouse_changed = 0;
323 mouse_changed = ~mouse_changed;
327 if( mouse_mode != MOUSE_POINTER )
329 if( mouse_changed ) {
330 mouse_changed = ~mouse_changed;
336 first_time = ~first_time;
337 #endif // #ifdef WIN32
340 // Call with FALSE to init and TRUE to restore
341 void BusyCursor( int restore )
343 static GLenum cursor = (GLenum) 0;
345 glutSetCursor(cursor);
347 cursor = (GLenum) glutGet( (GLenum) GLUT_WINDOW_CURSOR );
348 #if defined(WIN32_CURSOR_TWEAKS)
351 glutSetCursor( GLUT_CURSOR_WAIT );
355 int guiGetMouseButton(void)
360 void guiGetMouse(int *x, int *y)
366 void guiMotionFunc ( int x, int y )
368 int ww, wh, need_warp = 0;
372 if (mouse_mode == MOUSE_POINTER) {
374 glutPostRedisplay () ;
376 if( x == _mX && y == _mY)
379 // reset left click MOUSE_VIEW toggle feature
382 ww = current_view.get_winWidth();
383 wh = current_view.get_winHeight();
385 switch (mouse_mode) {
387 if( !mouse_joystick_control ) {
388 mouse_joystick_control = 1;
389 current_options.set_control_mode( fgOPTIONS::FG_MOUSE );
391 if ( left_button() ) {
392 offset = (_mX - x) * brake_sensitivity;
393 controls.move_brake(FGControls::ALL_WHEELS, offset);
394 offset = (_mY - y) * throttle_sensitivity;
395 controls.move_throttle(FGControls::ALL_ENGINES, offset);
396 } else if ( right_button() ) {
397 if( ! current_autopilot->get_HeadingEnabled() ) {
398 offset = (x - _mX) * rudder_sensitivity;
399 controls.move_rudder(offset);
401 if( ! current_autopilot->get_AltitudeEnabled() ) {
402 offset = (_mY - y) * trim_sensitivity;
403 controls.move_elevator_trim(offset);
406 if( ! current_autopilot->get_HeadingEnabled() ) {
407 offset = (x - _mX) * aileron_sensitivity;
408 controls.move_aileron(offset);
410 if( ! current_autopilot->get_AltitudeEnabled() ) {
411 offset = (_mY - y) * elevator_sensitivity;
412 controls.move_elevator(offset);
416 // Keep the mouse in the window.
417 if (x < 5 || x > ww-5 || y < 5 || y > wh-5) {
426 #define CONTRAINED_MOUSE_VIEW_Y
427 #ifdef CONTRAINED_MOUSE_VIEW_Y
431 #endif // CONTRAINED_MOUSE_VIEW_Y
433 } else if( y >= wh-1) {
434 #ifdef CONTRAINED_MOUSE_VIEW_Y
438 #endif // CONTRAINED_MOUSE_VIEW_Y
441 // wrap MOUSE_VIEW mode cursor x position
445 } else if ( x >= ww-1 ) {
449 // try to get FG_PI movement in each half of screen
453 if( middle_button() ) {
455 (2.0f * _mX - W) / W,
456 0, //(H - 2.0f * y) / H, // 3
458 0 //(H - 2.0f * _mY) / H // 1
465 0, //(2.0f * _mX - W) / W, // 0
466 (H - 2.0f * y) / H, // 3
467 0, //(2.0f * x - W) / W, // 2
468 (H - 2.0f * _mY) / H // 1
471 add_quats(lastquat, curquat, curquat);
472 build_rotmatrix(quat_mat, curquat);
475 // this could be done in above quat
476 // but requires redoing view pipeline
477 offset = current_view.get_goal_view_offset();
478 offset += ((_mX - x) * FG_2PI / W );
479 while (offset < 0.0) {
482 while (offset > FG_2PI) {
485 current_view.set_goal_view_offset(offset);
486 #ifdef NO_SMOOTH_MOUSE_VIEW
487 current_view.set_view_offset(offset);
496 glutWarpPointer(x, y);
498 // Record the new mouse position.
504 void guiMouseFunc(int button, int updown, int x, int y)
508 // private MOUSE_VIEW state variables
509 // to allow alternate left clicks in MOUSE_VIEW mode
510 // to toggle between current offsets and straight ahead
512 static int _mVx, _mVy, _Vx, _Vy;
513 static float _quat[4];
514 static double _view_offset;
516 // general purpose variables
519 glutModifiers = glutGetModifiers();
520 glut_active_shift = glutModifiers & GLUT_ACTIVE_SHIFT;
521 glut_active_ctrl = glutModifiers & GLUT_ACTIVE_CTRL;
522 glut_active_alt = glutModifiers & GLUT_ACTIVE_ALT;
524 // Was the left button pressed?
525 if (updown == GLUT_DOWN ) {
526 if( button == GLUT_LEFT_BUTTON)
528 switch (mouse_mode) {
535 // resume previous view offsets
540 curquat[0] = _quat[0];
541 curquat[1] = _quat[1];
542 curquat[2] = _quat[2];
543 curquat[3] = _quat[3];
544 current_view.set_goal_view_offset(_view_offset);
545 #ifdef NO_SMOOTH_MOUSE_VIEW
546 current_view.set_view_offset(_view_offset);
554 _quat[0] = curquat[0];
555 _quat[1] = curquat[1];
556 _quat[2] = curquat[2];
557 _quat[3] = curquat[3];
558 x = current_view.get_winWidth()/2;
559 y = current_view.get_winHeight()/2;
561 _view_offset = current_view.get_goal_view_offset();
562 current_view.set_goal_view_offset(0.0);
563 #ifdef NO_SMOOTH_MOUSE_VIEW
564 current_view.set_view_offset(0.0);
567 glutWarpPointer( x , y);
568 build_rotmatrix(quat_mat, curquat);
569 _mVtoggle = ~_mVtoggle;
572 }else if ( button == GLUT_RIGHT_BUTTON) {
573 switch (mouse_mode) {
575 mouse_mode = MOUSE_YOKE;
576 mouse_joystick_control = 0;
579 // start with zero point in center of screen
580 _mX = current_view.get_winWidth()/2;
581 _mY = current_view.get_winHeight()/2;
583 // try to have the MOUSE_YOKE position
584 // reflect the current stick position
585 offset = controls.get_aileron();
586 x = _mX - (int)(offset * aileron_sensitivity);
587 offset = controls.get_elevator();
588 y = _mY - (int)(offset * elevator_sensitivity);
590 glutSetCursor(GLUT_CURSOR_CROSSHAIR);
591 FG_LOG( FG_INPUT, FG_INFO, "Mouse in yoke mode" );
595 mouse_mode = MOUSE_VIEW;
596 current_options.set_control_mode( fgOPTIONS::FG_JOYSTICK );
597 x = current_view.get_winWidth()/2;
598 y = current_view.get_winHeight()/2;
601 build_rotmatrix(quat_mat, curquat);
602 glutSetCursor(GLUT_CURSOR_LEFT_RIGHT);
603 FG_LOG( FG_INPUT, FG_INFO, "Mouse in view mode" );
607 mouse_mode = MOUSE_POINTER;
610 #ifdef RESET_VIEW_ON_LEAVING_MOUSE_VIEW
612 build_rotmatrix(quat_mat, curquat);
613 current_view.set_goal_view_offset(0.0);
614 #ifdef NO_SMOOTH_MOUSE_VIEW
615 current_view.set_view_offset(0.0);
617 #endif // RESET_VIEW_ON_LEAVING_MOUSE_VIEW
618 glutSetCursor(GLUT_CURSOR_INHERIT);
623 FG_LOG( FG_INPUT, FG_INFO, "Mouse in pointer mode" );
626 glutWarpPointer( x, y );
627 } // END RIGHT BUTTON
628 } // END UPDOWN == GLUT_DOWN
630 // Note which button is pressed.
631 if ( updown == GLUT_DOWN ) {
632 last_buttons |= ( 1 << button ) ;
634 last_buttons &= ~( 1 << button ) ;
637 // If we're in pointer mode, let PUI
638 // know what's going on.
639 if (mouse_mode == MOUSE_POINTER) {
640 if (!puMouse (button, updown, x,y)) {
641 current_panel->doMouseAction(button, updown, x, y);
645 // Register the new position (if it
646 // hasn't been registered already).
650 glutPostRedisplay ();
653 /* ================ General Purpose Functions ================ */
655 // Intercept the Escape Key
656 void ConfirmExitDialog(void)
658 FG_PUSH_PUI_DIALOG( YNdialogBox );
661 // General Purpose Message Box
662 void mkDialog (const char *txt)
664 strncpy(global_dialog_string, txt, 256);
665 dialogBoxMessage->setLabel(global_dialog_string);
666 FG_PUSH_PUI_DIALOG( dialogBox );
669 // Repair any damage done to the Panel by other Gui Items
670 void guiFixPanel( void )
674 if ( current_options.get_panel_status() ) {
675 // FGView *v = ¤t_view;
676 if( (toggle_pause = !current_options.get_pause()) )
677 current_options.toggle_pause();
680 current_options.toggle_pause();
684 // Toggle the Menu and Mouse display state
685 void guiToggleMenu(void)
688 // printf("Hiding Menu\n");
689 mainMenuBar->hide ();
690 #if defined(WIN32_CURSOR_TWEAKS)
691 if( mouse_mode == MOUSE_POINTER )
693 #endif // #ifdef WIN32_CURSOR_TWEAKS
695 // printf("Showing Menu\n");
696 mainMenuBar->reveal();
699 #endif // #ifdef WIN32
704 /* -----------------------------------------------------------------------
705 the Gui callback functions
706 ____________________________________________________________________*/
708 static void saveFlight(puObject *cv)
711 ofstream output("fgfs.sav");
712 if (output.good() && fgSaveFlight(output)) {
714 mkDialog("Saved flight to ./fgfs.sav");
715 FG_LOG(FG_INPUT, FG_INFO, "Saved flight to fgfs.sav");
717 mkDialog("Cannot save flight to ./fgfs.sav");
718 FG_LOG(FG_INPUT, FG_ALERT, "Cannot save flight to fgfs.sav");
723 static void loadFlight(puObject *cb)
726 ifstream input("fgfs.sav");
727 if (input.good() && fgLoadFlight(input)) {
729 mkDialog("Loaded flight from fgfs.sav");
730 FG_LOG(FG_INPUT, FG_INFO, "Restored flight from ./fgfs.sav");
732 mkDialog("Failed to load flight from fgfs.sav");
733 FG_LOG(FG_INPUT, FG_ALERT, "Cannot load flight from ./fgfs.sav");
738 void reInit(puObject *cb)
742 build_rotmatrix(quat_mat, curquat);
743 fgReInitSubsystems();
747 static void toggleClouds(puObject *cb)
749 FGBFI::setClouds( !FGBFI::getClouds() );
752 // This is the accessor function
753 void guiTogglePanel(puObject *cb)
755 current_options.toggle_panel();
758 //void MenuHideMenuCb(puObject *cb)
759 void hideMenuCb (puObject *cb)
764 void goodBye(puObject *)
766 // FG_LOG( FG_INPUT, FG_ALERT,
767 // "Program exiting normally at user request." );
768 cout << "Program exiting normally at user request." << endl;
770 #ifdef FG_NETWORK_OLK
771 if ( current_options.get_network_olk() ) {
772 if ( net_is_registered == 0 ) fgd_send_com( "8", FGFS_host);
783 void goAwayCb (puObject *me)
785 FG_POP_PUI_DIALOG( dialogBox );
788 void mkDialogInit (void)
790 // printf("mkDialogInit\n");
791 int x = (current_options.get_xsize()/2 - 400/2);
792 int y = (current_options.get_ysize()/2 - 100/2);
793 dialogBox = new puDialogBox (x, y); // 150, 50
795 dialogFrame = new puFrame (0,0,400,100);
796 dialogBoxMessage = new puText (10, 70);
797 dialogBoxMessage -> setLabel ("");
798 dialogBoxOkButton = new puOneShot (180, 10, 240, 50);
799 dialogBoxOkButton -> setLegend (gui_msg_OK);
800 dialogBoxOkButton -> makeReturnDefault (TRUE );
801 dialogBoxOkButton -> setCallback (goAwayCb);
803 FG_FINALIZE_PUI_DIALOG( dialogBox );
806 void MayBeGoodBye(puObject *)
811 void goAwayYesNoCb(puObject *me)
813 FG_POP_PUI_DIALOG( YNdialogBox);
816 void ConfirmExitDialogInit(void)
818 char msg[] = "Really Quit";
821 // printf("ConfirmExitDialogInit\n");
822 int len = 200 - puGetStringWidth( puGetDefaultLabelFont(), msg )/2;
824 int x = (current_options.get_xsize()/2 - 400/2);
825 int y = (current_options.get_ysize()/2 - 100/2);
827 YNdialogBox = new puDialogBox (x, y); // 150, 50
828 // YNdialogBox = new puDialogBox (150, 50);
830 YNdialogFrame = new puFrame (0,0,400, 100);
832 YNdialogBoxMessage = new puText (len, 70);
833 YNdialogBoxMessage -> setDefaultValue (msg);
834 YNdialogBoxMessage -> getDefaultValue (&s);
835 YNdialogBoxMessage -> setLabel (s);
837 YNdialogBoxOkButton = new puOneShot (100, 10, 160, 50);
838 YNdialogBoxOkButton -> setLegend (gui_msg_OK);
839 YNdialogBoxOkButton -> makeReturnDefault (TRUE );
840 YNdialogBoxOkButton -> setCallback (goodBye);
842 YNdialogBoxNoButton = new puOneShot (240, 10, 300, 50);
843 YNdialogBoxNoButton -> setLegend (gui_msg_NO);
844 YNdialogBoxNoButton -> setCallback (goAwayYesNoCb);
846 FG_FINALIZE_PUI_DIALOG( YNdialogBox );
849 void notCb (puObject *)
851 mkDialog ("This function isn't implemented yet");
854 void helpCb (puObject *)
858 #if defined(FX) && !defined(WIN32)
859 # if defined(XMESA_FX_FULLSCREEN) && defined(XMESA_FX_WINDOW)
860 if ( global_fullscreen ) {
861 global_fullscreen = false;
862 XMesaSetFXmode( XMESA_FX_WINDOW );
868 string url = "http://www.flightgear.org/Docs/InstallGuide/getstart.html";
870 if ( system("xwininfo -name Netscape > /dev/null 2>&1") == 0 ) {
871 command = "netscape -remote \"openURL(" + url + ")\" &";
873 command = "netscape " + url + " &";
876 command = "webrun.bat";
879 system( command.c_str() );
880 //string text = "Help started in netscape window.";
882 //mkDialog (text.c_str());
883 mkDialog ("Help started in netscape window.");
886 #if defined( WIN32 ) && !defined( __CYGWIN__)
888 static void rotateView( double roll, double pitch, double yaw )
893 static GlBitmap *b1 = NULL;
894 extern FGInterface cur_view_fdm;
895 GLubyte *hiResScreenCapture( int multiplier )
897 float oldfov = current_options.get_fov();
898 float fov = oldfov / multiplier;
899 FGView *v = ¤t_view;
900 current_options.set_fov(fov);
901 v->force_update_fov_math();
903 int cur_width = current_view.get_winWidth( );
904 int cur_height = current_view.get_winHeight( );
905 if (b1) delete( b1 );
906 // New empty (mostly) bitmap
907 b1 = new GlBitmap( GL_RGB, 1, 1, (unsigned char *)"123" );
909 for ( y = 0; y < multiplier; y++ )
911 for ( x = 0; x < multiplier; x++ )
913 fgReshape( cur_width, cur_height );
915 rotateView( 0, (y*fov)-((multiplier-1)*fov/2), (x*fov)-((multiplier-1)*fov/2) );
919 b1->copyBitmap( &b2, cur_width*x, cur_height*y );
922 current_view.UpdateViewParams(cur_view_fdm);
923 current_options.set_fov(oldfov);
924 v->force_update_fov_math();
925 return b1->getBitmap();
930 #if defined( WIN32 ) && !defined( __CYGWIN__)
931 // win32 print screen function
932 void printScreen ( puObject *obj ) {
933 bool show_pu_cursor = false;
935 if ( !puCursorIsHidden() ) {
936 show_pu_cursor = true;
942 CGlPrinter p( CGlPrinter::PRINT_BITMAP );
943 int cur_width = current_view.get_winWidth( );
944 int cur_height = current_view.get_winHeight( );
945 p.Begin( "FlightGear", cur_width*3, cur_height*3 );
946 p.End( hiResScreenCapture(3) );
949 mainMenuBar->reveal();
952 if ( show_pu_cursor ) {
957 #endif // #ifdef WIN32
960 void dumpSnapShot ( puObject *obj ) {
965 // do a screen snap shot
966 void fgDumpSnapShot () {
967 bool show_pu_cursor = false;
971 if ( !puCursorIsHidden() ) {
972 show_pu_cursor = true;
977 fgReshape( current_options.get_xsize(), current_options.get_ysize() );
979 // we need two render frames here to clear the menu and cursor
980 // ... not sure why but doing an extra fgFenderFrame() shoulnd't
985 my_glDumpWindow( "fgfs-screen.ppm",
986 current_options.get_xsize(),
987 current_options.get_ysize() );
989 mkDialog ("Snap shot saved to fgfs-screen.ppm");
991 if ( show_pu_cursor ) {
997 mainMenuBar->reveal();
1003 /// The beginnings of teleportation :-)
1004 // Needs cleaning up but works
1005 // These statics should disapear when this is a class
1006 static puDialogBox *AptDialog = 0;
1007 static puFrame *AptDialogFrame = 0;
1008 static puText *AptDialogMessage = 0;
1009 static puInput *AptDialogInput = 0;
1011 static char NewAirportId[16];
1012 static char NewAirportLabel[] = "Enter New Airport ID";
1014 static puOneShot *AptDialogOkButton = 0;
1015 static puOneShot *AptDialogCancelButton = 0;
1016 static puOneShot *AptDialogResetButton = 0;
1018 void AptDialog_Cancel(puObject *)
1020 FG_POP_PUI_DIALOG( AptDialog );
1023 void AptDialog_OK (puObject *)
1025 FGPath path( current_options.get_fg_root() );
1026 path.append( "Airports" );
1027 path.append( "simple.mk4" );
1028 FGAirports airports( path.c_str() );
1032 int PauseMode = current_options.get_pause();
1034 current_options.toggle_pause();
1037 AptDialogInput->getValue(&s);
1040 cout << "AptDialog_OK " << AptId << " " << AptId.length() << endl;
1042 AptDialog_Cancel( NULL );
1044 if ( AptId.length() ) {
1045 // set initial position from airport id
1046 FG_LOG( FG_GENERAL, FG_INFO,
1047 "Attempting to set starting position from airport code "
1050 if ( airports.search( AptId, &a ) )
1052 current_options.set_airport_id( AptId.c_str() );
1054 fgReInitSubsystems();
1057 AptId += " not in database.";
1058 mkDialog(AptId.c_str());
1061 if( PauseMode != current_options.get_pause() )
1062 current_options.toggle_pause();
1065 void AptDialog_Reset(puObject *)
1067 // strncpy( NewAirportId, current_options.get_airport_id().c_str(), 16 );
1068 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1069 AptDialogInput->setValue ( NewAirportId );
1070 AptDialogInput->setCursor( 0 ) ;
1073 void NewAirport(puObject *cb)
1075 // strncpy( NewAirportId, current_options.get_airport_id().c_str(), 16 );
1076 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1077 // cout << "NewAirport " << NewAirportId << endl;
1078 AptDialogInput->setValue( NewAirportId );
1080 FG_PUSH_PUI_DIALOG( AptDialog );
1083 static void NewAirportInit(void)
1085 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1086 int len = 150 - puGetStringWidth( puGetDefaultLabelFont(),
1087 NewAirportLabel ) / 2;
1089 AptDialog = new puDialogBox (150, 50);
1091 AptDialogFrame = new puFrame (0,0,350, 150);
1092 AptDialogMessage = new puText (len, 110);
1093 AptDialogMessage -> setLabel (NewAirportLabel);
1095 AptDialogInput = new puInput (50, 70, 300, 100);
1096 AptDialogInput -> setValue (NewAirportId);
1097 AptDialogInput -> acceptInput();
1099 AptDialogOkButton = new puOneShot (50, 10, 110, 50);
1100 AptDialogOkButton -> setLegend (gui_msg_OK);
1101 AptDialogOkButton -> setCallback (AptDialog_OK);
1102 AptDialogOkButton -> makeReturnDefault(TRUE);
1104 AptDialogCancelButton = new puOneShot (140, 10, 210, 50);
1105 AptDialogCancelButton -> setLegend (gui_msg_CANCEL);
1106 AptDialogCancelButton -> setCallback (AptDialog_Cancel);
1108 AptDialogResetButton = new puOneShot (240, 10, 300, 50);
1109 AptDialogResetButton -> setLegend (gui_msg_RESET);
1110 AptDialogResetButton -> setCallback (AptDialog_Reset);
1112 cout << "NewAirportInit " << NewAirportId << endl;
1113 FG_FINALIZE_PUI_DIALOG( AptDialog );
1116 #ifdef FG_NETWORK_OLK
1118 /// The beginnings of networking :-)
1119 // Needs cleaning up but works
1120 // These statics should disapear when this is a class
1121 static puDialogBox *NetIdDialog = 0;
1122 static puFrame *NetIdDialogFrame = 0;
1123 static puText *NetIdDialogMessage = 0;
1124 static puInput *NetIdDialogInput = 0;
1126 static char NewNetId[16];
1127 static char NewNetIdLabel[] = "Enter New Callsign";
1128 extern char *fgd_callsign;
1130 static puOneShot *NetIdDialogOkButton = 0;
1131 static puOneShot *NetIdDialogCancelButton = 0;
1133 void NetIdDialog_Cancel(puObject *)
1135 FG_POP_PUI_DIALOG( NetIdDialog );
1138 void NetIdDialog_OK (puObject *)
1142 int PauseMode = current_options.get_pause();
1144 current_options.toggle_pause();
1146 The following needs some cleanup because
1147 "string options.NetId" and "char *net_callsign"
1149 NetIdDialogInput->getValue(&net_callsign);
1150 NetId = net_callsign;
1152 NetIdDialog_Cancel( NULL );
1153 current_options.set_net_id( NetId.c_str() );
1154 strcpy( fgd_callsign, net_callsign);
1155 // strcpy( fgd_callsign, current_options.get_net_id().c_str());
1156 /* Entering a callsign indicates : user wants Net HUD Info */
1157 net_hud_display = 1;
1159 if( PauseMode != current_options.get_pause() )
1160 current_options.toggle_pause();
1163 void NewCallSign(puObject *cb)
1165 sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1166 // sprintf( NewNetId, "%s", fgd_callsign );
1167 NetIdDialogInput->setValue( NewNetId );
1169 FG_PUSH_PUI_DIALOG( NetIdDialog );
1172 static void NewNetIdInit(void)
1174 sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1175 // sprintf( NewNetId, "%s", fgd_callsign );
1176 int len = 150 - puGetStringWidth( puGetDefaultLabelFont(),
1177 NewNetIdLabel ) / 2;
1179 NetIdDialog = new puDialogBox (150, 50);
1181 NetIdDialogFrame = new puFrame (0,0,350, 150);
1182 NetIdDialogMessage = new puText (len, 110);
1183 NetIdDialogMessage -> setLabel (NewNetIdLabel);
1185 NetIdDialogInput = new puInput (50, 70, 300, 100);
1186 NetIdDialogInput -> setValue (NewNetId);
1187 NetIdDialogInput -> acceptInput();
1189 NetIdDialogOkButton = new puOneShot (50, 10, 110, 50);
1190 NetIdDialogOkButton -> setLegend (gui_msg_OK);
1191 NetIdDialogOkButton -> setCallback (NetIdDialog_OK);
1192 NetIdDialogOkButton -> makeReturnDefault(TRUE);
1194 NetIdDialogCancelButton = new puOneShot (240, 10, 300, 50);
1195 NetIdDialogCancelButton -> setLegend (gui_msg_CANCEL);
1196 NetIdDialogCancelButton -> setCallback (NetIdDialog_Cancel);
1199 FG_FINALIZE_PUI_DIALOG( NetIdDialog );
1202 static void net_display_toggle( puObject *cb)
1204 net_hud_display = (net_hud_display) ? 0 : 1;
1205 printf("Toggle net_hud_display : %d\n", net_hud_display);
1208 static void net_register( puObject *cb)
1210 fgd_send_com( "1", FGFS_host );
1211 net_is_registered = 0;
1212 printf("Registering to deamon\n");
1215 static void net_unregister( puObject *cb)
1217 fgd_send_com( "8", FGFS_host );
1218 net_is_registered = -1;
1219 printf("Unregistering from deamon\n");
1223 /*************** Deamon communication **********/
1225 // These statics should disapear when this is a class
1226 static puDialogBox *NetFGDDialog = 0;
1227 static puFrame *NetFGDDialogFrame = 0;
1228 static puText *NetFGDDialogMessage = 0;
1229 //static puInput *NetFGDDialogInput = 0;
1231 //static char NewNetId[16];
1232 static char NewNetFGDLabel[] = "Scan for deamon ";
1233 static char NewFGDHost[64] = "olk.mcp.de";
1234 static int NewFGDPortLo = 10000;
1235 static int NewFGDPortHi = 10001;
1237 //extern char *fgd_callsign;
1238 extern u_short base_port, end_port;
1239 extern int fgd_ip, verbose, current_port;
1240 extern char *fgd_host;
1243 static puOneShot *NetFGDDialogOkButton = 0;
1244 static puOneShot *NetFGDDialogCancelButton = 0;
1245 static puOneShot *NetFGDDialogScanButton = 0;
1247 static puInput *NetFGDHostDialogInput = 0;
1248 static puInput *NetFGDPortLoDialogInput = 0;
1249 static puInput *NetFGDPortHiDialogInput = 0;
1251 void NetFGDDialog_Cancel(puObject *)
1253 FG_POP_PUI_DIALOG( NetFGDDialog );
1256 void NetFGDDialog_OK (puObject *)
1260 int PauseMode = current_options.get_pause();
1261 if(!PauseMode) current_options.toggle_pause();
1262 NetFGDHostDialogInput->getValue( &NetFGD );
1263 strcpy( fgd_host, NetFGD);
1264 NetFGDPortLoDialogInput->getValue( (int *) &base_port );
1265 NetFGDPortHiDialogInput->getValue( (int *) &end_port );
1266 NetFGDDialog_Cancel( NULL );
1267 if( PauseMode != current_options.get_pause() )
1268 current_options.toggle_pause();
1271 void NetFGDDialog_SCAN (puObject *)
1276 int PauseMode = current_options.get_pause();
1277 if(!PauseMode) current_options.toggle_pause();
1278 // printf("Vor getvalue %s\n");
1279 NetFGDHostDialogInput->getValue( &NetFGD );
1280 // printf("Vor strcpy %s\n", (char *) NetFGD);
1281 strcpy( fgd_host, NetFGD);
1282 NetFGDPortLoDialogInput->getValue( (int *) &base_port );
1283 NetFGDPortHiDialogInput->getValue( (int *) &end_port );
1284 printf("FGD: %s Port-Start: %d Port-End: %d\n", fgd_host,
1285 base_port, end_port);
1286 net_resolv_fgd(fgd_host);
1287 printf("Resolve : %d\n", net_r);
1288 if( PauseMode != current_options.get_pause() ) {
1289 current_options.toggle_pause();
1293 strcpy( fgd_name, "");
1294 for( current_port = base_port; ( current_port <= end_port); current_port++) {
1295 fgd_send_com("0" , FGFS_host);
1296 sprintf( NewNetFGDLabel , "Scanning for deamon Port: %d", current_port);
1297 printf("FGD: searching %s\n", fgd_name);
1298 if ( strcmp( fgd_name, "") != 0 ) {
1299 sprintf( NewNetFGDLabel , "Found %s at Port: %d",
1300 fgd_name, current_port);
1301 fgd_port = current_port;
1302 current_port = end_port+1;
1305 current_port = end_port = base_port = fgd_port;
1307 NetFGDDialog_Cancel( NULL );
1311 void net_fgd_scan(puObject *cb)
1313 NewFGDPortLo = base_port;
1314 NewFGDPortHi = end_port;
1315 strcpy( NewFGDHost, fgd_host);
1316 NetFGDPortLoDialogInput->setValue( NewFGDPortLo );
1317 NetFGDPortHiDialogInput->setValue( NewFGDPortHi );
1318 NetFGDHostDialogInput->setValue( NewFGDHost );
1320 FG_PUSH_PUI_DIALOG( NetFGDDialog );
1324 static void NewNetFGDInit(void)
1326 // sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1327 // sprintf( NewNetId, "%s", fgd_callsign );
1328 int len = 170 - puGetStringWidth( puGetDefaultLabelFont(),
1329 NewNetFGDLabel ) / 2;
1331 NetFGDDialog = new puDialogBox (310, 30);
1333 NetFGDDialogFrame = new puFrame (0,0,320, 170);
1334 NetFGDDialogMessage = new puText (len, 140);
1335 NetFGDDialogMessage -> setLabel (NewNetFGDLabel);
1337 NetFGDPortLoDialogInput = new puInput (50, 70, 127, 100);
1338 NetFGDPortLoDialogInput -> setValue (NewFGDPortLo);
1339 NetFGDPortLoDialogInput -> acceptInput();
1341 NetFGDPortHiDialogInput = new puInput (199, 70, 275, 100);
1342 NetFGDPortHiDialogInput -> setValue (NewFGDPortHi);
1343 NetFGDPortHiDialogInput -> acceptInput();
1345 NetFGDHostDialogInput = new puInput (50, 100, 275, 130);
1346 NetFGDHostDialogInput -> setValue (NewFGDHost);
1347 NetFGDHostDialogInput -> acceptInput();
1349 NetFGDDialogScanButton = new puOneShot (130, 10, 200, 50);
1350 NetFGDDialogScanButton -> setLegend ("Scan");
1351 NetFGDDialogScanButton -> setCallback (NetFGDDialog_SCAN);
1352 NetFGDDialogScanButton -> makeReturnDefault(FALSE);
1354 NetFGDDialogOkButton = new puOneShot (50, 10, 120, 50);
1355 NetFGDDialogOkButton -> setLegend (gui_msg_OK);
1356 NetFGDDialogOkButton -> setCallback (NetFGDDialog_OK);
1357 NetFGDDialogOkButton -> makeReturnDefault(TRUE);
1359 NetFGDDialogCancelButton = new puOneShot (210, 10, 280, 50);
1360 NetFGDDialogCancelButton -> setLegend (gui_msg_CANCEL);
1361 NetFGDDialogCancelButton -> setCallback (NetFGDDialog_Cancel);
1364 FG_FINALIZE_PUI_DIALOG( NetFGDDialog );
1368 static void net_display_toggle( puObject *cb)
1370 net_hud_display = (net_hud_display) ? 0 : 1;
1371 printf("Toggle net_hud_display : %d\n", net_hud_display);
1378 /*************** End Networking **************/
1382 /* -----------------------------------------------------------------------
1384 ---------------------------------------------------------------------*/
1385 char *fileSubmenu [] = {
1386 "Exit", /* "Close", "---------", */
1387 #if defined( WIN32 ) && !defined( __CYGWIN__)
1397 puCallback fileSubmenuCb [] = {
1398 MayBeGoodBye, /* hideMenuCb, NULL, */
1399 #if defined( WIN32 ) && !defined( __CYGWIN__)
1412 char *editSubmenu [] = {
1415 puCallback editSubmenuCb [] = {
1420 extern void fgHUDalphaAdjust( puObject * );
1421 char *viewSubmenu [] = {
1423 /* "Cockpit View > ", "View >","------------", */
1424 "Toggle Panel...", NULL
1426 puCallback viewSubmenuCb [] = {
1428 /* notCb, notCb, NULL, */
1429 guiTogglePanel, NULL
1432 char *aircraftSubmenu [] = {
1433 "Autopilot", "Heading", "Altitude", "Navigation", "Airport",
1434 /* "Communication", */ NULL
1436 puCallback aircraftSubmenuCb [] = {
1437 fgAPAdjust, NewHeading, NewAltitude, fgLatLonFormatToggle, NewTgtAirport,
1441 char *environmentSubmenu [] = {
1443 "Goto Airport", /* "Terrain", "Weather", */ NULL
1445 puCallback environmentSubmenuCb [] = {
1447 NewAirport, /* notCb, notCb, */ NULL
1451 char *optionsSubmenu [] = {
1452 "Preferences", "Realism & Reliablity...", NULL
1454 puCallback optionsSubmenuCb [] = {
1459 #ifdef FG_NETWORK_OLK
1460 char *networkSubmenu [] = {
1461 "Unregister from FGD ", /* "Send MSG to All", "Send MSG", "Show Pilots", */
1463 "Scan for Deamons", "Enter Callsign", /* "Display Netinfos", */
1464 "Toggle Display", NULL
1466 puCallback networkSubmenuCb [] = {
1467 /* notCb, notCb, notCb, notCb, */
1470 net_fgd_scan, NewCallSign,
1471 net_display_toggle, NULL
1475 char *helpSubmenu [] = {
1476 /* "About...", */ "Help", NULL
1478 puCallback helpSubmenuCb [] = {
1479 /* notCb, */ helpCb, NULL
1483 /* -------------------------------------------------------------------------
1485 _____________________________________________________________________*/
1490 char *mesa_win_state;
1494 puSetDefaultStyle ( PUSTYLE_SMALL_BEVELLED ); //PUSTYLE_DEFAULT
1495 puSetDefaultColourScheme (0.8, 0.8, 0.8, 0.4);
1497 // Initialize our GLOBAL GUI STRINGS
1498 gui_msg_OK = msg_OK; // "OK"
1499 gui_msg_NO = msg_NO; // "NO"
1500 gui_msg_YES = msg_YES; // "YES"
1501 gui_msg_CANCEL = msg_CANCEL; // "CANCEL"
1502 gui_msg_RESET = msg_RESET; // "RESET"
1504 // Next check home directory
1506 char* envp = ::getenv( "FG_FONTS" );
1507 if ( envp != NULL ) {
1508 fntpath.set( envp );
1510 fntpath.set( current_options.get_fg_root() );
1511 fntpath.append( "Fonts" );
1514 // Install our fast fonts
1515 fntpath.append( "typewriter.txf" );
1516 guiFntHandle = new fntTexFont ;
1517 guiFntHandle -> load ( (char *)fntpath.c_str() ) ;
1518 puFont GuiFont ( guiFntHandle, 15 ) ;
1519 puSetDefaultFonts( GuiFont, GuiFont ) ;
1520 guiFnt = puGetDefaultLabelFont();
1522 if ( current_options.get_mouse_pointer() == 0 ) {
1523 // no preference specified for mouse pointer, attempt to autodetect...
1524 // Determine if we need to render the cursor, or if the windowing
1525 // system will do it. First test if we are rendering with glide.
1526 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1527 // Test for the MESA_GLX_FX env variable
1528 if ( (mesa_win_state = getenv( "MESA_GLX_FX" )) != NULL) {
1529 // test if we are fullscreen mesa/glide
1530 if ( (mesa_win_state[0] == 'f') ||
1531 (mesa_win_state[0] == 'F') ) {
1536 mouse_active = ~mouse_active;
1537 } else if ( current_options.get_mouse_pointer() == 1 ) {
1538 // don't show pointer
1539 } else if ( current_options.get_mouse_pointer() == 2 ) {
1540 // force showing pointer
1542 mouse_active = ~mouse_active;
1545 // MOUSE_VIEW mode stuff
1546 trackball(_quat0, 0.0, 0.0, 0.0, 0.0);
1548 build_rotmatrix(quat_mat, curquat);
1550 // Set up our Dialog Boxes
1551 ConfirmExitDialogInit();
1553 #ifdef FG_NETWORK_OLK
1559 // Make the menu bar
1560 mainMenuBar = new puMenuBar ();
1561 mainMenuBar -> add_submenu ("File", fileSubmenu, fileSubmenuCb);
1562 // mainMenuBar -> add_submenu ("Edit", editSubmenu, editSubmenuCb);
1563 mainMenuBar -> add_submenu ("View", viewSubmenu, viewSubmenuCb);
1564 mainMenuBar -> add_submenu ("Aircraft", aircraftSubmenu, aircraftSubmenuCb);
1565 mainMenuBar -> add_submenu ("Environment", environmentSubmenu, environmentSubmenuCb);
1566 // mainMenuBar -> add_submenu ("Options", optionsSubmenu, optionsSubmenuCb);
1567 #ifdef FG_NETWORK_OLK
1568 mainMenuBar -> add_submenu ("Network", networkSubmenu, networkSubmenuCb);
1570 mainMenuBar -> add_submenu ("Help", helpSubmenu, helpSubmenuCb);
1571 mainMenuBar-> close ();
1572 // Set up menu bar toggle
1581 * Implementation of a virtual trackball.
1582 * Implemented by Gavin Bell, lots of ideas from Thant Tessman and
1583 * the August '88 issue of Siggraph's "Computer Graphics," pp. 121-129.
1585 * Vector manip code:
1587 * Original code from:
1588 * David M. Ciemiewicz, Mark Grossman, Henry Moreton, and Paul Haeberli
1590 * Much mucking with by:
1593 #if defined(_WIN32) && !defined( __CYGWIN32__ )
1594 #pragma warning (disable:4244) /* disable bogus conversion warnings */
1598 //#include "trackball.h"
1601 * This size should really be based on the distance from the center of
1602 * rotation to the point on the object underneath the mouse. That
1603 * point would then track the mouse as closely as possible. This is a
1604 * simple example, though, so that is left as an Exercise for the
1607 #define TRACKBALLSIZE (0.8f)
1608 #define SQRT(x) sqrt(x)
1611 * Local function prototypes (not defined in trackball.h)
1613 static float tb_project_to_sphere(float, float, float);
1614 static void normalize_quat(float [4]);
1625 vset(float *v, float x, float y, float z)
1633 vsub(const float *src1, const float *src2, float *dst)
1635 dst[0] = src1[0] - src2[0];
1636 dst[1] = src1[1] - src2[1];
1637 dst[2] = src1[2] - src2[2];
1641 vcopy(const float *v1, float *v2)
1644 for (i = 0 ; i < 3 ; i++)
1649 vcross(const float *v1, const float *v2, float *cross)
1653 temp[0] = (v1[1] * v2[2]) - (v1[2] * v2[1]);
1654 temp[1] = (v1[2] * v2[0]) - (v1[0] * v2[2]);
1655 temp[2] = (v1[0] * v2[1]) - (v1[1] * v2[0]);
1660 vlength(const float *v)
1662 float tmp = v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
1667 vscale(float *v, float div)
1677 vscale(v,1.0/vlength(v));
1681 vdot(const float *v1, const float *v2)
1683 return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2];
1687 vadd(const float *src1, const float *src2, float *dst)
1689 dst[0] = src1[0] + src2[0];
1690 dst[1] = src1[1] + src2[1];
1691 dst[2] = src1[2] + src2[2];
1695 * Given an axis and angle, compute quaternion.
1698 axis_to_quat(float a[3], float phi, float q[4])
1700 double sinphi2, cosphi2;
1701 double phi2 = phi/2.0;
1702 sinphi2 = sin(phi2);
1703 cosphi2 = cos(phi2);
1711 * Project an x,y pair onto a sphere of radius r OR a hyperbolic sheet
1712 * if we are away from the center of the sphere.
1715 tb_project_to_sphere(float r, float x, float y)
1721 if (d < r * 0.70710678118654752440) { /* Inside sphere */
1724 } else { /* On hyperbola */
1725 t = r / 1.41421356237309504880;
1732 * Quaternions always obey: a^2 + b^2 + c^2 + d^2 = 1.0
1733 * If they don't add up to 1.0, dividing by their magnitued will
1736 * Note: See the following for more information on quaternions:
1738 * - Shoemake, K., Animating rotation with quaternion curves, Computer
1739 * Graphics 19, No 3 (Proc. SIGGRAPH'85), 245-254, 1985.
1740 * - Pletinckx, D., Quaternion calculus as a basic tool in computer
1741 * graphics, The Visual Computer 5, 2-13, 1989.
1744 normalize_quat(float q[4])
1749 tmp = q[0]*q[0] + q[1]*q[1] + q[2]*q[2] + q[3]*q[3];
1750 mag = 1.0 / SQRT(tmp);
1751 for (i = 0; i < 4; i++)
1756 * Ok, simulate a track-ball. Project the points onto the virtual
1757 * trackball, then figure out the axis of rotation, which is the cross
1758 * product of P1 P2 and O P1 (O is the center of the ball, 0,0,0)
1759 * Note: This is a deformed trackball-- is a trackball in the center,
1760 * but is deformed into a hyperbolic sheet of rotation away from the
1761 * center. This particular function was chosen after trying out
1762 * several variations.
1764 * It is assumed that the arguments to this routine are in the range
1768 trackball(float q[4], float p1x, float p1y, float p2x, float p2y)
1770 float a[3]; /* Axis of rotation */
1771 float phi; /* how much to rotate about axis */
1772 float p1[3], p2[3], d[3];
1775 if (p1x == p2x && p1y == p2y) {
1783 * First, figure out z-coordinates for projection of P1 and P2 to
1786 vset(p1,p1x,p1y,tb_project_to_sphere(TRACKBALLSIZE,p1x,p1y));
1787 vset(p2,p2x,p2y,tb_project_to_sphere(TRACKBALLSIZE,p2x,p2y));
1790 * Now, we want the cross product of P1 and P2
1795 * Figure out how much to rotate around that axis.
1798 t = vlength(d) / (2.0*TRACKBALLSIZE);
1801 * Avoid problems with out-of-control values...
1803 if (t > 1.0) t = 1.0;
1804 if (t < -1.0) t = -1.0;
1805 phi = 2.0 * asin(t);
1807 axis_to_quat(a,phi,q);
1811 * Given two rotations, e1 and e2, expressed as quaternion rotations,
1812 * figure out the equivalent single rotation and stuff it into dest.
1814 * This routine also normalizes the result every RENORMCOUNT times it is
1815 * called, to keep error from creeping in.
1817 * NOTE: This routine is written so that q1 or q2 may be the same
1818 * as dest (or each other).
1821 #define RENORMCOUNT 97
1824 add_quats(float q1[4], float q2[4], float dest[4])
1827 float t1[4], t2[4], t3[4];
1831 printf("q1 = %f %f %f %f\n", q1[0], q1[1], q1[2], q1[3]);
1832 printf("q2 = %f %f %f %f\n", q2[0], q2[1], q2[2], q2[3]);
1844 tf[3] = q1[3] * q2[3] - vdot(q1,q2);
1847 printf("tf = %f %f %f %f\n", tf[0], tf[1], tf[2], tf[3]);
1855 if (++count > RENORMCOUNT) {
1857 normalize_quat(dest);
1862 * Build a rotation matrix, given a quaternion rotation.
1866 build_rotmatrix(float m[4][4], float q[4])
1868 //#define TRANSPOSED_QUAT
1869 #ifndef TRANSPOSED_QUAT
1870 m[0][0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2]);
1871 m[0][1] = 2.0 * (q[0] * q[1] - q[2] * q[3]);
1872 m[0][2] = 2.0 * (q[2] * q[0] + q[1] * q[3]);
1875 m[1][0] = 2.0 * (q[0] * q[1] + q[2] * q[3]);
1876 m[1][1]= 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0]);
1877 m[1][2] = 2.0 * (q[1] * q[2] - q[0] * q[3]);
1880 m[2][0] = 2.0 * (q[2] * q[0] - q[1] * q[3]);
1881 m[2][1] = 2.0 * (q[1] * q[2] + q[0] * q[3]);
1882 m[2][2] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0]);
1889 #else // TRANSPOSED_QUAT
1890 m[0][0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2]);
1891 m[0][1] = 2.0 * (q[0] * q[1] + q[2] * q[3]);
1892 m[0][2] = 2.0 * (q[2] * q[0] - q[1] * q[3]);
1895 m[1][0] = 2.0 * (q[0] * q[1] - q[2] * q[3]);
1896 m[1][1] = 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0]);
1897 m[1][2] = 2.0 * (q[1] * q[2] + q[0] * q[3]);
1900 m[2][0] = 2.0 * (q[2] * q[0] + q[1] * q[3]);
1901 m[2][1] = 2.0 * (q[1] * q[2] - q[0] * q[3]);
1902 m[2][2] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0]);