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.h>
44 #if defined(FX) && defined(XMESA)
45 # include <GL/xmesa.h>
53 #include <simgear/constants.h>
54 #include <simgear/logstream.hxx>
55 #include <simgear/fgpath.hxx>
56 #include <simgear/screen-dump.hxx>
58 #include <Include/general.hxx>
59 #include <Aircraft/aircraft.hxx>
60 #include <Airports/simple.hxx>
61 #include <Cockpit/panel.hxx>
62 #include <Controls/controls.hxx>
63 #include <FDM/flight.hxx>
64 #include <Main/options.hxx>
65 #include <Main/fg_init.hxx>
66 #include <Main/views.hxx>
68 #include <NetworkOLK/network.h>
70 #include <Time/fg_time.hxx>
72 #if defined( WIN32 ) && !defined( __CYGWIN__ )
73 # include <Screen/win32-printer.h>
74 # include <Screen/GlBitmaps.h>
79 * A virtual trackball implementation
80 * Written by Gavin Bell for Silicon Graphics, November 1988.
83 * Pass the x and y coordinates of the last and current positions of
84 * the mouse, scaled so they are from (-1.0 ... 1.0).
86 * The resulting rotation is returned as a quaternion rotation in the
90 trackball(float q[4], float p1x, float p1y, float p2x, float p2y);
93 * Given two quaternions, add them together to get a third quaternion.
94 * Adding quaternions to get a compound rotation is analagous to adding
95 * translations to get a compound translation. When incrementally
96 * adding rotations, the first argument here should be the new
98 * rotation, the second and third the total rotation (which will be
99 * over-written with the resulting new total rotation).
102 add_quats(float *q1, float *q2, float *dest);
105 * A useful function, builds a rotation matrix in Matrix based on
109 build_rotmatrix(float m[4][4], float q[4]);
112 * This function computes a quaternion based on an axis (defined by
113 * the given vector) and an angle about which to rotate. The angle is
114 * expressed in radians. The result is put into the third argument.
117 axis_to_quat(float a[3], float phi, float q[4]);
122 FG_USING_STD(string);
124 #ifndef FG_HAVE_NATIVE_SGI_COMPILERS
128 #if defined(WIN32) || defined(__CYGWIN32__)
129 #define WIN32_CURSOR_TWEAKS
130 #elif (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
131 #define X_CURSOR_TWEAKS
134 // hack, should come from an include someplace
135 extern void fgInitVisuals( void );
136 extern void fgReshape( int width, int height );
137 extern void fgRenderFrame( void );
140 fntTexFont *guiFntHandle = 0;
142 static puMenuBar *mainMenuBar = 0;
143 //static puButton *hideMenuButton = 0;
145 static puDialogBox *dialogBox = 0;
146 static puFrame *dialogFrame = 0;
147 static puText *dialogBoxMessage = 0;
148 static puOneShot *dialogBoxOkButton = 0;
151 static puDialogBox *YNdialogBox = 0;
152 static puFrame *YNdialogFrame = 0;
153 static puText *YNdialogBoxMessage = 0;
154 static puOneShot *YNdialogBoxOkButton = 0;
155 static puOneShot *YNdialogBoxNoButton = 0;
157 static char msg_OK[] = "OK";
158 static char msg_NO[] = "NO";
159 static char msg_YES[] = "YES";
160 static char msg_CANCEL[] = "Cancel";
161 static char msg_RESET[] = "Reset";
163 char *gui_msg_OK; // "OK"
164 char *gui_msg_NO; // "NO"
165 char *gui_msg_YES; // "YES"
166 char *gui_msg_CANCEL; // "CANCEL"
167 char *gui_msg_RESET; // "RESET"
169 static char global_dialog_string[256];
171 // from autopilot.cxx
172 extern void NewAltitude( puObject *cb );
173 extern void NewHeading( puObject *cb );
174 extern void fgAPAdjust( puObject * );
175 extern void NewTgtAirport( puObject *cb );
176 bool fgAPTerrainFollowEnabled( void );
177 bool fgAPAltitudeEnabled( void );
178 bool fgAPHeadingEnabled( void );
179 bool fgAPWayPointEnabled( void );
180 bool fgAPAutoThrottleEnabled( void );
183 extern void fgLatLonFormatToggle( puObject *);
185 /* --------------------------------------------------------------------
187 ---------------------------------------------------------------------*/
191 static int _savedX = 0;
192 static int _savedY = 0;
193 static int last_buttons = 0 ;
194 static int mouse_active = 0;
195 static int menu_on = 0;
196 static int mouse_joystick_control = 0;
198 //static time_t mouse_off_time;
199 //static int mouse_timed_out;
201 // to allow returning to previous view
202 // on second left click in MOUSE_VIEW mode
203 // This has file scope so that it can be reset
204 // if the little rodent is moved NHV
205 static int _mVtoggle;
207 // we break up the glutGetModifiers return mask
208 // once per loop and stash what we need in these
209 static int glut_active_shift;
210 static int glut_active_ctrl;
211 static int glut_active_alt;
213 static float lastquat[4];
214 static float curquat[4];
215 static float _quat0[4];
216 float quat_mat[4][4];
218 // uncomment this for view to exactly follow mouse in MOUSE_VIEW mode
219 // else smooth out the view panning to .01 radian per frame
220 // see view_offset smoothing mechanism in main.cxx
221 #define NO_SMOOTH_MOUSE_VIEW
223 // uncomment following to
224 #define RESET_VIEW_ON_LEAVING_MOUSE_VIEW
226 /* --------------------------------------------------------------------
227 Support for mouse as control yoke (david@megginson.com)
229 - right button toggles between pointer and yoke
230 - horizontal drag with no buttons moves ailerons
231 - vertical drag with no buttons moves elevators
232 - horizontal drag with left button moves brakes (left=on)
233 - vertical drag with left button moves throttle (up=more)
234 - horizontal drag with middle button moves rudder
235 - vertical drag with middle button moves trim
237 For the *_sensitivity variables, a lower number means more sensitive.
239 TODO: figure out how to keep pointer from leaving window in yoke mode.
240 TODO: add thresholds and null zones
241 TODO: sensitivity should be configurable at user option.
242 TODO: allow differential braking (this will be useful if FlightGear
243 ever supports tail-draggers like the DC-3)
244 ---------------------------------------------------------------------*/
252 MouseMode mouse_mode = MOUSE_POINTER;
254 static double aileron_sensitivity = 1.0/500.0;
255 static double elevator_sensitivity = 1.0/500.0;
256 static double brake_sensitivity = 1.0/250.0;
257 static double throttle_sensitivity = 1.0/250.0;
258 static double rudder_sensitivity = 1.0/500.0;
259 static double trim_sensitivity = 1.0/1000.0;
261 static inline void Quat0( void ) {
262 curquat[0] = _quat0[0];
263 curquat[1] = _quat0[1];
264 curquat[2] = _quat0[2];
265 curquat[3] = _quat0[3];
268 static inline int left_button( void ) {
269 return( last_buttons & (1 << GLUT_LEFT_BUTTON) );
272 static inline int middle_button( void ) {
273 return( last_buttons & (1 << GLUT_MIDDLE_BUTTON) );
276 static inline int right_button( void ) {
277 return( last_buttons & (1 << GLUT_RIGHT_BUTTON) );
280 static inline void TurnCursorOn( void )
283 #if defined(WIN32_CURSOR_TWEAKS)
284 switch (mouse_mode) {
286 glutSetCursor(GLUT_CURSOR_INHERIT);
289 glutSetCursor(GLUT_CURSOR_CROSSHAIR);
292 glutSetCursor(GLUT_CURSOR_LEFT_RIGHT);
296 #if defined(X_CURSOR_TWEAKS)
297 glutWarpPointer( current_view.get_winWidth()/2, current_view.get_winHeight()/2);
301 static inline void TurnCursorOff( void )
304 #if defined(WIN32_CURSOR_TWEAKS)
305 glutSetCursor(GLUT_CURSOR_NONE);
306 #elif defined(X_CURSOR_TWEAKS)
307 glutWarpPointer( current_view.get_winWidth(), current_view.get_winHeight());
311 void maybeToggleMouse( void )
313 #if defined(WIN32_CURSOR_TWEAKS)
314 static int first_time = ~0;
315 static int mouse_changed = 0;
319 mouse_changed = ~mouse_changed;
323 if( mouse_mode != MOUSE_POINTER )
325 if( mouse_changed ) {
326 mouse_changed = ~mouse_changed;
332 first_time = ~first_time;
333 #endif // #ifdef WIN32
336 // Call with FALSE to init and TRUE to restore
337 void BusyCursor( int restore )
339 static GLenum cursor = (GLenum) 0;
341 glutSetCursor(cursor);
343 cursor = (GLenum) glutGet( (GLenum) GLUT_WINDOW_CURSOR );
344 #if defined(WIN32_CURSOR_TWEAKS)
347 glutSetCursor( GLUT_CURSOR_WAIT );
351 int guiGetMouseButton(void)
356 void guiGetMouse(int *x, int *y)
362 void guiMotionFunc ( int x, int y )
364 int ww, wh, need_warp = 0;
367 // FGTime *t = FGTime::cur_time_params;
368 // if( mouse_timed_out ) {
369 // if( t->get_cur_time() > mouse_off_time ) {
370 // moused_timed_out = 0;
372 // glutPostRedisplay () ;
376 if (mouse_mode == MOUSE_POINTER) {
378 glutPostRedisplay () ;
380 if( x == _mX && y == _mY)
383 // reset left click MOUSE_VIEW toggle feature
386 ww = current_view.get_winWidth();
387 wh = current_view.get_winHeight();
389 switch (mouse_mode) {
391 if( !mouse_joystick_control ) {
392 mouse_joystick_control = 1;
393 current_options.set_control_mode( fgOPTIONS::FG_MOUSE );
395 if ( left_button() ) {
396 offset = (_mX - x) * brake_sensitivity;
397 controls.move_brake(FGControls::ALL_WHEELS, offset);
398 offset = (_mY - y) * throttle_sensitivity;
399 controls.move_throttle(FGControls::ALL_ENGINES, offset);
400 } else if ( right_button() ) {
401 if( !fgAPHeadingEnabled() ) {
402 offset = (x - _mX) * rudder_sensitivity;
403 controls.move_rudder(offset);
405 if( !fgAPAltitudeEnabled() ) {
406 offset = (_mY - y) * trim_sensitivity;
407 controls.move_elevator_trim(offset);
410 if( !fgAPHeadingEnabled() ) {
411 offset = (x - _mX) * aileron_sensitivity;
412 controls.move_aileron(offset);
414 if( !fgAPAltitudeEnabled() ) {
415 offset = (_mY - y) * elevator_sensitivity;
416 controls.move_elevator(offset);
420 // Keep the mouse in the window.
421 if (x < 5 || x > ww-5 || y < 5 || y > wh-5) {
430 #define CONTRAINED_MOUSE_VIEW_Y
431 #ifdef CONTRAINED_MOUSE_VIEW_Y
435 #endif // CONTRAINED_MOUSE_VIEW_Y
437 } else if( y >= wh-1) {
438 #ifdef CONTRAINED_MOUSE_VIEW_Y
442 #endif // CONTRAINED_MOUSE_VIEW_Y
445 // wrap MOUSE_VIEW mode cursor x position
449 } else if ( x >= ww-1 ) {
453 // try to get FG_PI movement in each half of screen
457 if( middle_button() ) {
459 (2.0f * _mX - W) / W,
460 0, //(H - 2.0f * y) / H, // 3
462 0 //(H - 2.0f * _mY) / H // 1
469 0, //(2.0f * _mX - W) / W, // 0
470 (H - 2.0f * y) / H, // 3
471 0, //(2.0f * x - W) / W, // 2
472 (H - 2.0f * _mY) / H // 1
475 add_quats(lastquat, curquat, curquat);
476 build_rotmatrix(quat_mat, curquat);
479 // this could be done in above quat
480 // but requires redoing view pipeline
481 offset = current_view.get_goal_view_offset();
482 offset += ((_mX - x) * FG_2PI / W );
483 while (offset < 0.0) {
486 while (offset > FG_2PI) {
489 current_view.set_goal_view_offset(offset);
490 #ifdef NO_SMOOTH_MOUSE_VIEW
491 current_view.set_view_offset(offset);
500 glutWarpPointer(x, y);
502 // Record the new mouse position.
508 void guiMouseFunc(int button, int updown, int x, int y)
512 // private MOUSE_VIEW state variables
513 // to allow alternate left clicks in MOUSE_VIEW mode
514 // to toggle between current offsets and straight ahead
516 static int _mVx, _mVy, _Vx, _Vy;
517 static float _quat[4];
518 static double _view_offset;
520 // general purpose variables
523 glutModifiers = glutGetModifiers();
524 glut_active_shift = glutModifiers & GLUT_ACTIVE_SHIFT;
525 glut_active_ctrl = glutModifiers & GLUT_ACTIVE_CTRL;
526 glut_active_alt = glutModifiers & GLUT_ACTIVE_ALT;
528 // Was the left button pressed?
529 if (updown == GLUT_DOWN ) {
530 if( button == GLUT_LEFT_BUTTON)
532 switch (mouse_mode) {
539 // resume previous view offsets
544 curquat[0] = _quat[0];
545 curquat[1] = _quat[1];
546 curquat[2] = _quat[2];
547 curquat[3] = _quat[3];
548 current_view.set_goal_view_offset(_view_offset);
549 #ifdef NO_SMOOTH_MOUSE_VIEW
550 current_view.set_view_offset(_view_offset);
558 _quat[0] = curquat[0];
559 _quat[1] = curquat[1];
560 _quat[2] = curquat[2];
561 _quat[3] = curquat[3];
562 x = current_view.get_winWidth()/2;
563 y = current_view.get_winHeight()/2;
565 _view_offset = current_view.get_goal_view_offset();
566 current_view.set_goal_view_offset(0.0);
567 #ifdef NO_SMOOTH_MOUSE_VIEW
568 current_view.set_view_offset(0.0);
571 glutWarpPointer( x , y);
572 build_rotmatrix(quat_mat, curquat);
573 _mVtoggle = ~_mVtoggle;
576 }else if ( button == GLUT_RIGHT_BUTTON) {
577 switch (mouse_mode) {
579 mouse_mode = MOUSE_YOKE;
580 mouse_joystick_control = 0;
583 // start with zero point in center of screen
584 _mX = current_view.get_winWidth()/2;
585 _mY = current_view.get_winHeight()/2;
587 // try to have the MOUSE_YOKE position
588 // reflect the current stick position
589 offset = controls.get_aileron();
590 x = _mX - (int)(offset * aileron_sensitivity);
591 offset = controls.get_elevator();
592 y = _mY - (int)(offset * elevator_sensitivity);
594 glutSetCursor(GLUT_CURSOR_CROSSHAIR);
595 FG_LOG( FG_INPUT, FG_INFO, "Mouse in yoke mode" );
599 mouse_mode = MOUSE_VIEW;
600 current_options.set_control_mode( fgOPTIONS::FG_JOYSTICK );
601 x = current_view.get_winWidth()/2;
602 y = current_view.get_winHeight()/2;
605 build_rotmatrix(quat_mat, curquat);
606 glutSetCursor(GLUT_CURSOR_LEFT_RIGHT);
607 FG_LOG( FG_INPUT, FG_INFO, "Mouse in view mode" );
611 mouse_mode = MOUSE_POINTER;
614 #ifdef RESET_VIEW_ON_LEAVING_MOUSE_VIEW
616 build_rotmatrix(quat_mat, curquat);
617 current_view.set_goal_view_offset(0.0);
618 #ifdef NO_SMOOTH_MOUSE_VIEW
619 current_view.set_view_offset(0.0);
621 #endif // RESET_VIEW_ON_LEAVING_MOUSE_VIEW
622 glutSetCursor(GLUT_CURSOR_INHERIT);
627 FG_LOG( FG_INPUT, FG_INFO, "Mouse in pointer mode" );
630 glutWarpPointer( x, y );
631 } // END RIGHT BUTTON
632 } // END UPDOWN == GLUT_DOWN
634 // Note which button is pressed.
635 if ( updown == GLUT_DOWN ) {
636 last_buttons |= ( 1 << button ) ;
638 last_buttons &= ~( 1 << button ) ;
641 // If we're in pointer mode, let PUI
642 // know what's going on.
643 if (mouse_mode == MOUSE_POINTER) {
644 puMouse (button, updown, x,y);
647 // Register the new position (if it
648 // hasn't been registered already).
652 glutPostRedisplay ();
655 /* ================ General Purpose Functions ================ */
657 // Intercept the Escape Key
658 void ConfirmExitDialog(void)
660 FG_PUSH_PUI_DIALOG( YNdialogBox );
663 // General Purpose Message Box
664 void mkDialog (const char *txt)
666 strncpy(global_dialog_string, txt, 256);
667 dialogBoxMessage->setLabel(global_dialog_string);
668 FG_PUSH_PUI_DIALOG( dialogBox );
671 // Repair any damage done to the Panel by other Gui Items
672 void guiFixPanel( void )
676 if ( current_options.get_panel_status() ) {
677 FGView *v = ¤t_view;
678 FGTime *t = FGTime::cur_time_params;
680 if( (toggle_pause = !t->getPause()) )
681 t->togglePauseMode();
683 // this seems to be the only way to do this :-(
684 // problem is the viewport has been mucked with
685 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) );
686 FGPanel::OurPanel->ReInit(0, 0, 1024, 768);
689 t->togglePauseMode();
693 // Toggle the Menu and Mouse display state
694 void guiToggleMenu(void)
697 // printf("Hiding Menu\n");
698 mainMenuBar->hide ();
699 #if defined(WIN32_CURSOR_TWEAKS)
700 if( mouse_mode == MOUSE_POINTER )
702 #endif // #ifdef WIN32_CURSOR_TWEAKS
704 // printf("Showing Menu\n");
705 mainMenuBar->reveal();
708 #endif // #ifdef WIN32
713 /* -----------------------------------------------------------------------
714 the Gui callback functions
715 ____________________________________________________________________*/
717 void reInit(puObject *cb)
721 build_rotmatrix(quat_mat, curquat);
722 fgReInitSubsystems();
726 // This is the accessor function
727 void guiTogglePanel(puObject *cb)
729 current_options.toggle_panel();
732 //void MenuHideMenuCb(puObject *cb)
733 void hideMenuCb (puObject *cb)
738 void goodBye(puObject *)
740 // FG_LOG( FG_INPUT, FG_ALERT,
741 // "Program exiting normally at user request." );
742 cout << "Program exiting normally at user request." << endl;
744 #ifdef FG_NETWORK_OLK
745 if ( net_is_registered == 0 ) fgd_send_com( "8", FGFS_host);
755 void goAwayCb (puObject *me)
757 FG_POP_PUI_DIALOG( dialogBox );
760 void mkDialogInit (void)
762 // printf("mkDialogInit\n");
763 int x = (current_options.get_xsize()/2 - 400/2);
764 int y = (current_options.get_ysize()/2 - 100/2);
765 dialogBox = new puDialogBox (x, y); // 150, 50
767 dialogFrame = new puFrame (0,0,400,100);
768 dialogBoxMessage = new puText (10, 70);
769 dialogBoxMessage -> setLabel ("");
770 dialogBoxOkButton = new puOneShot (180, 10, 240, 50);
771 dialogBoxOkButton -> setLegend (gui_msg_OK);
772 dialogBoxOkButton -> makeReturnDefault (TRUE );
773 dialogBoxOkButton -> setCallback (goAwayCb);
775 FG_FINALIZE_PUI_DIALOG( dialogBox );
778 void MayBeGoodBye(puObject *)
783 void goAwayYesNoCb(puObject *me)
785 FG_POP_PUI_DIALOG( YNdialogBox);
788 void ConfirmExitDialogInit(void)
790 char msg[] = "Really Quit";
793 // printf("ConfirmExitDialogInit\n");
794 int len = 200 - puGetStringWidth( puGetDefaultLabelFont(), msg )/2;
796 int x = (current_options.get_xsize()/2 - 400/2);
797 int y = (current_options.get_ysize()/2 - 100/2);
799 YNdialogBox = new puDialogBox (x, y); // 150, 50
800 // YNdialogBox = new puDialogBox (150, 50);
802 YNdialogFrame = new puFrame (0,0,400, 100);
804 YNdialogBoxMessage = new puText (len, 70);
805 YNdialogBoxMessage -> setDefaultValue (msg);
806 YNdialogBoxMessage -> getDefaultValue (&s);
807 YNdialogBoxMessage -> setLabel (s);
809 YNdialogBoxOkButton = new puOneShot (100, 10, 160, 50);
810 YNdialogBoxOkButton -> setLegend (gui_msg_OK);
811 YNdialogBoxOkButton -> setCallback (goodBye);
813 YNdialogBoxNoButton = new puOneShot (240, 10, 300, 50);
814 YNdialogBoxNoButton -> setLegend (gui_msg_NO);
815 // YNdialogBoxNoButton -> makeReturnDefault (TRUE );
816 YNdialogBoxNoButton -> setCallback (goAwayYesNoCb);
818 FG_FINALIZE_PUI_DIALOG( YNdialogBox );
821 void notCb (puObject *)
823 mkDialog ("This function isn't implemented yet");
826 void helpCb (puObject *)
830 #if defined(FX) && !defined(WIN32)
831 # if defined(XMESA_FX_FULLSCREEN) && defined(XMESA_FX_WINDOW)
832 if ( global_fullscreen ) {
833 global_fullscreen = false;
834 XMesaSetFXmode( XMESA_FX_WINDOW );
840 string url = "http://www.flightgear.org/Docs/InstallGuide/getstart.html";
842 if ( system("xwininfo -name Netscape > /dev/null 2>&1") == 0 ) {
843 command = "netscape -remote \"openURL(" + url + ")\" &";
845 command = "netscape " + url + " &";
848 command = "webrun.bat";
851 system( command.c_str() );
852 //string text = "Help started in netscape window.";
854 //mkDialog (text.c_str());
855 mkDialog ("Help started in netscape window.");
858 #if defined( WIN32 ) && !defined( __CYGWIN__)
860 static void rotateView( double roll, double pitch, double yaw )
865 static GLBitmap *b1 = NULL;
866 extern FGInterface cur_view_fdm;
867 GLubyte *hiResScreenCapture( int multiplier )
869 float oldfov = current_options.get_fov();
870 float fov = oldfov / multiplier;
871 FGView *v = ¤t_view;
872 current_options.set_fov(fov);
873 v->force_update_fov_math();
875 int cur_width = current_view.get_winWidth( );
876 int cur_height = current_view.get_winHeight( );
877 if (b1) delete( b1 );
878 // New empty (mostly) bitmap
879 b1 = new GlBitmap( GL_RGB, 1, 1, (unsigned char *)"123" );
881 for ( y = 0; y < multiplier; y++ )
883 for ( x = 0; x < multiplier; x++ )
885 fgReshape( cur_width, cur_height );
887 rotateView( 0, (y*fov)-((multiplier-1)*fov/2), (x*fov)-((multiplier-1)*fov/2) );
891 b1->copyBitmap( &b2, cur_width*x, cur_height*y );
894 current_view.UpdateViewParams(cur_view_fdm);
895 current_options.set_fov(oldfov);
896 v->force_update_fov_math();
897 return b1->getBitmap();
902 #if defined( WIN32 ) && !defined( __CYGWIN__)
903 // win32 print screen function
904 void printScreen ( puObject *obj ) {
905 bool show_pu_cursor = false;
907 if ( !puCursorIsHidden() ) {
908 show_pu_cursor = true;
914 CGlPrinter p( CGlPrinter::PRINT_BITMAP );
915 int cur_width = current_view.get_winWidth( );
916 int cur_height = current_view.get_winHeight( );
917 p.Begin( "FlightGear", cur_width*3, cur_height*3 );
918 p.End( hiResScreenCapture(3) );
921 mainMenuBar->reveal();
924 if ( show_pu_cursor ) {
929 #endif // #ifdef WIN32
932 void dumpSnapShot ( puObject *obj ) {
937 // do a screen snap shot
938 void fgDumpSnapShot () {
939 bool show_pu_cursor = false;
943 if ( !puCursorIsHidden() ) {
944 show_pu_cursor = true;
949 fgReshape( current_options.get_xsize(), current_options.get_ysize() );
951 // we need two render frames here to clear the menu and cursor
952 // ... not sure why but doing an extra fgFenderFrame() shoulnd't
957 my_glDumpWindow( "fgfs-screen.ppm",
958 current_options.get_xsize(),
959 current_options.get_ysize() );
961 mkDialog ("Snap shot saved to fgfs-screen.ppm");
963 if ( show_pu_cursor ) {
969 mainMenuBar->reveal();
975 /// The beginnings of teleportation :-)
976 // Needs cleaning up but works
977 // These statics should disapear when this is a class
978 static puDialogBox *AptDialog = 0;
979 static puFrame *AptDialogFrame = 0;
980 static puText *AptDialogMessage = 0;
981 static puInput *AptDialogInput = 0;
983 static char NewAirportId[16];
984 static char NewAirportLabel[] = "Enter New Airport ID";
986 static puOneShot *AptDialogOkButton = 0;
987 static puOneShot *AptDialogCancelButton = 0;
988 static puOneShot *AptDialogResetButton = 0;
990 void AptDialog_Cancel(puObject *)
992 FG_POP_PUI_DIALOG( AptDialog );
995 void AptDialog_OK (puObject *)
1000 FGTime *t = FGTime::cur_time_params;
1001 int PauseMode = t->getPause();
1003 t->togglePauseMode();
1006 AptDialogInput->getValue(&s);
1009 cout << "AptDialog_OK " << AptId << " " << AptId.length() << endl;
1011 AptDialog_Cancel( NULL );
1013 if ( AptId.length() ) {
1014 // set initial position from airport id
1015 FG_LOG( FG_GENERAL, FG_INFO,
1016 "Attempting to set starting position from airport code "
1019 airports.load("apt_simple");
1020 if ( airports.search( AptId, &a ) )
1022 current_options.set_airport_id( AptId.c_str() );
1024 fgReInitSubsystems();
1027 AptId += " not in database.";
1028 mkDialog(AptId.c_str());
1031 if( PauseMode != t->getPause() )
1032 t->togglePauseMode();
1035 void AptDialog_Reset(puObject *)
1037 // strncpy( NewAirportId, current_options.get_airport_id().c_str(), 16 );
1038 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1039 AptDialogInput->setValue ( NewAirportId );
1040 AptDialogInput->setCursor( 0 ) ;
1043 void NewAirport(puObject *cb)
1045 // strncpy( NewAirportId, current_options.get_airport_id().c_str(), 16 );
1046 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1047 // cout << "NewAirport " << NewAirportId << endl;
1048 AptDialogInput->setValue( NewAirportId );
1050 FG_PUSH_PUI_DIALOG( AptDialog );
1053 static void NewAirportInit(void)
1055 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1056 int len = 150 - puGetStringWidth( puGetDefaultLabelFont(),
1057 NewAirportLabel ) / 2;
1059 AptDialog = new puDialogBox (150, 50);
1061 AptDialogFrame = new puFrame (0,0,350, 150);
1062 AptDialogMessage = new puText (len, 110);
1063 AptDialogMessage -> setLabel (NewAirportLabel);
1065 AptDialogInput = new puInput (50, 70, 300, 100);
1066 AptDialogInput -> setValue (NewAirportId);
1067 AptDialogInput -> acceptInput();
1069 AptDialogOkButton = new puOneShot (50, 10, 110, 50);
1070 AptDialogOkButton -> setLegend (gui_msg_OK);
1071 AptDialogOkButton -> setCallback (AptDialog_OK);
1072 AptDialogOkButton -> makeReturnDefault(TRUE);
1074 AptDialogCancelButton = new puOneShot (140, 10, 210, 50);
1075 AptDialogCancelButton -> setLegend (gui_msg_CANCEL);
1076 AptDialogCancelButton -> setCallback (AptDialog_Cancel);
1078 AptDialogResetButton = new puOneShot (240, 10, 300, 50);
1079 AptDialogResetButton -> setLegend (gui_msg_RESET);
1080 AptDialogResetButton -> setCallback (AptDialog_Reset);
1082 cout << "NewAirportInit " << NewAirportId << endl;
1083 FG_FINALIZE_PUI_DIALOG( AptDialog );
1086 #ifdef FG_NETWORK_OLK
1088 /// The beginnings of networking :-)
1089 // Needs cleaning up but works
1090 // These statics should disapear when this is a class
1091 static puDialogBox *NetIdDialog = 0;
1092 static puFrame *NetIdDialogFrame = 0;
1093 static puText *NetIdDialogMessage = 0;
1094 static puInput *NetIdDialogInput = 0;
1096 static char NewNetId[16];
1097 static char NewNetIdLabel[] = "Enter New Callsign";
1098 extern char *fgd_callsign;
1100 static puOneShot *NetIdDialogOkButton = 0;
1101 static puOneShot *NetIdDialogCancelButton = 0;
1103 void NetIdDialog_Cancel(puObject *)
1105 FG_POP_PUI_DIALOG( NetIdDialog );
1108 void NetIdDialog_OK (puObject *)
1112 FGTime *t = FGTime::cur_time_params;
1113 int PauseMode = t->getPause();
1115 t->togglePauseMode();
1117 The following needs some cleanup because
1118 "string options.NetId" and "char *net_callsign"
1120 NetIdDialogInput->getValue(&net_callsign);
1121 NetId = net_callsign;
1123 NetIdDialog_Cancel( NULL );
1124 current_options.set_net_id( NetId.c_str() );
1125 strcpy( fgd_callsign, net_callsign);
1126 // strcpy( fgd_callsign, current_options.get_net_id().c_str());
1127 /* Entering a callsign indicates : user wants Net HUD Info */
1128 net_hud_display = 1;
1130 if( PauseMode != t->getPause() )
1131 t->togglePauseMode();
1134 void NewCallSign(puObject *cb)
1136 sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1137 // sprintf( NewNetId, "%s", fgd_callsign );
1138 NetIdDialogInput->setValue( NewNetId );
1140 FG_PUSH_PUI_DIALOG( NetIdDialog );
1143 static void NewNetIdInit(void)
1145 sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1146 // sprintf( NewNetId, "%s", fgd_callsign );
1147 int len = 150 - puGetStringWidth( puGetDefaultLabelFont(),
1148 NewNetIdLabel ) / 2;
1150 NetIdDialog = new puDialogBox (150, 50);
1152 NetIdDialogFrame = new puFrame (0,0,350, 150);
1153 NetIdDialogMessage = new puText (len, 110);
1154 NetIdDialogMessage -> setLabel (NewNetIdLabel);
1156 NetIdDialogInput = new puInput (50, 70, 300, 100);
1157 NetIdDialogInput -> setValue (NewNetId);
1158 NetIdDialogInput -> acceptInput();
1160 NetIdDialogOkButton = new puOneShot (50, 10, 110, 50);
1161 NetIdDialogOkButton -> setLegend (gui_msg_OK);
1162 NetIdDialogOkButton -> setCallback (NetIdDialog_OK);
1163 NetIdDialogOkButton -> makeReturnDefault(TRUE);
1165 NetIdDialogCancelButton = new puOneShot (240, 10, 300, 50);
1166 NetIdDialogCancelButton -> setLegend (gui_msg_CANCEL);
1167 NetIdDialogCancelButton -> setCallback (NetIdDialog_Cancel);
1170 FG_FINALIZE_PUI_DIALOG( NetIdDialog );
1173 static void net_display_toggle( puObject *cb)
1175 net_hud_display = (net_hud_display) ? 0 : 1;
1176 printf("Toggle net_hud_display : %d\n", net_hud_display);
1179 static void net_register( puObject *cb)
1181 fgd_send_com( "1", FGFS_host );
1182 net_is_registered = 0;
1183 printf("Registering to deamon\n");
1186 static void net_unregister( puObject *cb)
1188 fgd_send_com( "8", FGFS_host );
1189 net_is_registered = -1;
1190 printf("Unregistering from deamon\n");
1194 /*************** Deamon communication **********/
1196 // These statics should disapear when this is a class
1197 static puDialogBox *NetFGDDialog = 0;
1198 static puFrame *NetFGDDialogFrame = 0;
1199 static puText *NetFGDDialogMessage = 0;
1200 //static puInput *NetFGDDialogInput = 0;
1202 //static char NewNetId[16];
1203 static char NewNetFGDLabel[] = "Scan for deamon ";
1204 static char NewFGDHost[64] = "olk.mcp.de";
1205 static int NewFGDPortLo = 10000;
1206 static int NewFGDPortHi = 10001;
1208 //extern char *fgd_callsign;
1209 extern u_short base_port, end_port;
1210 extern int fgd_ip, verbose, current_port;
1211 extern char *fgd_host;
1214 static puOneShot *NetFGDDialogOkButton = 0;
1215 static puOneShot *NetFGDDialogCancelButton = 0;
1216 static puOneShot *NetFGDDialogScanButton = 0;
1218 static puInput *NetFGDHostDialogInput = 0;
1219 static puInput *NetFGDPortLoDialogInput = 0;
1220 static puInput *NetFGDPortHiDialogInput = 0;
1222 void NetFGDDialog_Cancel(puObject *)
1224 FG_POP_PUI_DIALOG( NetFGDDialog );
1227 void NetFGDDialog_OK (puObject *)
1231 FGTime *t = FGTime::cur_time_params;
1232 int PauseMode = t->getPause();
1233 if(!PauseMode) t->togglePauseMode();
1234 NetFGDHostDialogInput->getValue( &NetFGD );
1235 strcpy( fgd_host, NetFGD);
1236 NetFGDPortLoDialogInput->getValue( (int *) &base_port );
1237 NetFGDPortHiDialogInput->getValue( (int *) &end_port );
1238 NetFGDDialog_Cancel( NULL );
1239 if( PauseMode != t->getPause() )
1240 t->togglePauseMode();
1243 void NetFGDDialog_SCAN (puObject *)
1248 FGTime *t = FGTime::cur_time_params;
1249 int PauseMode = t->getPause();
1250 if(!PauseMode) t->togglePauseMode();
1251 // printf("Vor getvalue %s\n");
1252 NetFGDHostDialogInput->getValue( &NetFGD );
1253 // printf("Vor strcpy %s\n", (char *) NetFGD);
1254 strcpy( fgd_host, NetFGD);
1255 NetFGDPortLoDialogInput->getValue( (int *) &base_port );
1256 NetFGDPortHiDialogInput->getValue( (int *) &end_port );
1257 printf("FGD: %s Port-Start: %d Port-End: %d\n", fgd_host,
1258 base_port, end_port);
1259 net_resolv_fgd(fgd_host);
1260 printf("Resolve : %d\n", net_r);
1261 if( PauseMode != t->getPause() ) t->togglePauseMode();
1264 strcpy( fgd_name, "");
1265 for( current_port = base_port; ( current_port <= end_port); current_port++) {
1266 fgd_send_com("0" , FGFS_host);
1267 sprintf( NewNetFGDLabel , "Scanning for deamon Port: %d", current_port);
1268 printf("FGD: searching %s\n", fgd_name);
1269 if ( strcmp( fgd_name, "") != 0 ) {
1270 sprintf( NewNetFGDLabel , "Found %s at Port: %d",
1271 fgd_name, current_port);
1272 fgd_port = current_port;
1273 current_port = end_port+1;
1276 current_port = end_port = base_port = fgd_port;
1278 NetFGDDialog_Cancel( NULL );
1282 void net_fgd_scan(puObject *cb)
1284 NewFGDPortLo = base_port;
1285 NewFGDPortHi = end_port;
1286 strcpy( NewFGDHost, fgd_host);
1287 NetFGDPortLoDialogInput->setValue( NewFGDPortLo );
1288 NetFGDPortHiDialogInput->setValue( NewFGDPortHi );
1289 NetFGDHostDialogInput->setValue( NewFGDHost );
1291 FG_PUSH_PUI_DIALOG( NetFGDDialog );
1295 static void NewNetFGDInit(void)
1297 // sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1298 // sprintf( NewNetId, "%s", fgd_callsign );
1299 int len = 170 - puGetStringWidth( puGetDefaultLabelFont(),
1300 NewNetFGDLabel ) / 2;
1302 NetFGDDialog = new puDialogBox (310, 30);
1304 NetFGDDialogFrame = new puFrame (0,0,320, 170);
1305 NetFGDDialogMessage = new puText (len, 140);
1306 NetFGDDialogMessage -> setLabel (NewNetFGDLabel);
1308 NetFGDPortLoDialogInput = new puInput (50, 70, 127, 100);
1309 NetFGDPortLoDialogInput -> setValue (NewFGDPortLo);
1310 NetFGDPortLoDialogInput -> acceptInput();
1312 NetFGDPortHiDialogInput = new puInput (199, 70, 275, 100);
1313 NetFGDPortHiDialogInput -> setValue (NewFGDPortHi);
1314 NetFGDPortHiDialogInput -> acceptInput();
1316 NetFGDHostDialogInput = new puInput (50, 100, 275, 130);
1317 NetFGDHostDialogInput -> setValue (NewFGDHost);
1318 NetFGDHostDialogInput -> acceptInput();
1320 NetFGDDialogScanButton = new puOneShot (130, 10, 200, 50);
1321 NetFGDDialogScanButton -> setLegend ("Scan");
1322 NetFGDDialogScanButton -> setCallback (NetFGDDialog_SCAN);
1323 NetFGDDialogScanButton -> makeReturnDefault(FALSE);
1325 NetFGDDialogOkButton = new puOneShot (50, 10, 120, 50);
1326 NetFGDDialogOkButton -> setLegend (gui_msg_OK);
1327 NetFGDDialogOkButton -> setCallback (NetFGDDialog_OK);
1328 NetFGDDialogOkButton -> makeReturnDefault(TRUE);
1330 NetFGDDialogCancelButton = new puOneShot (210, 10, 280, 50);
1331 NetFGDDialogCancelButton -> setLegend (gui_msg_CANCEL);
1332 NetFGDDialogCancelButton -> setCallback (NetFGDDialog_Cancel);
1335 FG_FINALIZE_PUI_DIALOG( NetFGDDialog );
1339 static void net_display_toggle( puObject *cb)
1341 net_hud_display = (net_hud_display) ? 0 : 1;
1342 printf("Toggle net_hud_display : %d\n", net_hud_display);
1349 /*************** End Networking **************/
1353 /* -----------------------------------------------------------------------
1355 ---------------------------------------------------------------------*/
1356 char *fileSubmenu [] = {
1357 "Exit", /* "Close", "---------", */
1358 #if defined( WIN32 ) && !defined( __CYGWIN__)
1362 /* "---------", "Save", */
1365 puCallback fileSubmenuCb [] = {
1366 MayBeGoodBye, /* hideMenuCb, NULL, */
1367 #if defined( WIN32 ) && !defined( __CYGWIN__)
1376 char *editSubmenu [] = {
1379 puCallback editSubmenuCb [] = {
1384 char *viewSubmenu [] = {
1385 /* "Cockpit View > ", "View >","------------", */ "Toggle Panel...", NULL
1387 puCallback viewSubmenuCb [] = {
1388 /* notCb, notCb, NULL, guiTogglePanel, */ NULL
1391 char *aircraftSubmenu [] = {
1392 "Autopilot", "Heading", "Altitude", "Navigation", "Airport",
1393 /* "Communication", */ NULL
1395 puCallback aircraftSubmenuCb [] = {
1396 fgAPAdjust, NewHeading, NewAltitude, fgLatLonFormatToggle, NewTgtAirport,
1400 char *environmentSubmenu [] = {
1401 "Airport", /* "Terrain", "Weather", */ NULL
1403 puCallback environmentSubmenuCb [] = {
1404 NewAirport, /* notCb, notCb, */ NULL
1408 char *optionsSubmenu [] = {
1409 "Preferences", "Realism & Reliablity...", NULL
1411 puCallback optionsSubmenuCb [] = {
1416 #ifdef FG_NETWORK_OLK
1417 char *networkSubmenu [] = {
1418 "Unregister from FGD ", /* "Send MSG to All", "Send MSG", "Show Pilots", */
1420 "Scan for Deamons", "Enter Callsign", /* "Display Netinfos", */
1421 "Toggle Display", NULL
1423 puCallback networkSubmenuCb [] = {
1424 /* notCb, notCb, notCb, notCb, */
1427 net_fgd_scan, NewCallSign,
1428 net_display_toggle, NULL
1432 char *helpSubmenu [] = {
1433 /* "About...", */ "Help", NULL
1435 puCallback helpSubmenuCb [] = {
1436 /* notCb, */ helpCb, NULL
1440 /* -------------------------------------------------------------------------
1442 _____________________________________________________________________*/
1447 char *mesa_win_state;
1451 puSetDefaultStyle ( PUSTYLE_SMALL_BEVELLED ); //PUSTYLE_DEFAULT
1452 puSetDefaultColourScheme (0.8, 0.8, 0.8, 0.4);
1454 // Initialize our GLOBAL GUI STRINGS
1455 gui_msg_OK = msg_OK; // "OK"
1456 gui_msg_NO = msg_NO; // "NO"
1457 gui_msg_YES = msg_YES; // "YES"
1458 gui_msg_CANCEL = msg_CANCEL; // "CANCEL"
1459 gui_msg_RESET = msg_RESET; // "RESET"
1461 // Next check home directory
1463 char* envp = ::getenv( "FG_FONTS" );
1464 if ( envp != NULL ) {
1465 fntpath.set( envp );
1467 fntpath.set( current_options.get_fg_root() );
1468 fntpath.append( "Fonts" );
1471 // Install our fast fonts
1472 fntpath.append( "typewriter.txf" );
1473 guiFntHandle = new fntTexFont ;
1474 guiFntHandle -> load ( (char *)fntpath.c_str() ) ;
1475 puFont GuiFont ( guiFntHandle, 15 ) ;
1476 puSetDefaultFonts( GuiFont, GuiFont ) ;
1477 guiFnt = puGetDefaultLabelFont();
1479 if ( current_options.get_mouse_pointer() == 0 ) {
1480 // no preference specified for mouse pointer, attempt to autodetect...
1481 // Determine if we need to render the cursor, or if the windowing
1482 // system will do it. First test if we are rendering with glide.
1483 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1484 // Test for the MESA_GLX_FX env variable
1485 if ( (mesa_win_state = getenv( "MESA_GLX_FX" )) != NULL) {
1486 // test if we are fullscreen mesa/glide
1487 if ( (mesa_win_state[0] == 'f') ||
1488 (mesa_win_state[0] == 'F') ) {
1493 mouse_active = ~mouse_active;
1494 } else if ( current_options.get_mouse_pointer() == 1 ) {
1495 // don't show pointer
1496 } else if ( current_options.get_mouse_pointer() == 2 ) {
1497 // force showing pointer
1499 mouse_active = ~mouse_active;
1502 // MOUSE_VIEW mode stuff
1503 trackball(_quat0, 0.0, 0.0, 0.0, 0.0);
1505 build_rotmatrix(quat_mat, curquat);
1507 // Set up our Dialog Boxes
1508 ConfirmExitDialogInit();
1510 #ifdef FG_NETWORK_OLK
1516 // Make the menu bar
1517 mainMenuBar = new puMenuBar ();
1518 mainMenuBar -> add_submenu ("File", fileSubmenu, fileSubmenuCb);
1519 // mainMenuBar -> add_submenu ("Edit", editSubmenu, editSubmenuCb);
1520 mainMenuBar -> add_submenu ("View", viewSubmenu, viewSubmenuCb);
1521 mainMenuBar -> add_submenu ("Aircraft", aircraftSubmenu, aircraftSubmenuCb);
1522 mainMenuBar -> add_submenu ("Environment", environmentSubmenu, environmentSubmenuCb);
1523 // mainMenuBar -> add_submenu ("Options", optionsSubmenu, optionsSubmenuCb);
1524 #ifdef FG_NETWORK_OLK
1525 mainMenuBar -> add_submenu ("Network", networkSubmenu, networkSubmenuCb);
1527 mainMenuBar -> add_submenu ("Help", helpSubmenu, helpSubmenuCb);
1528 mainMenuBar-> close ();
1529 // Set up menu bar toggle
1538 * Implementation of a virtual trackball.
1539 * Implemented by Gavin Bell, lots of ideas from Thant Tessman and
1540 * the August '88 issue of Siggraph's "Computer Graphics," pp. 121-129.
1542 * Vector manip code:
1544 * Original code from:
1545 * David M. Ciemiewicz, Mark Grossman, Henry Moreton, and Paul Haeberli
1547 * Much mucking with by:
1550 #if defined(_WIN32) && !defined( __CYGWIN32__ )
1551 #pragma warning (disable:4244) /* disable bogus conversion warnings */
1555 //#include "trackball.h"
1558 * This size should really be based on the distance from the center of
1559 * rotation to the point on the object underneath the mouse. That
1560 * point would then track the mouse as closely as possible. This is a
1561 * simple example, though, so that is left as an Exercise for the
1564 #define TRACKBALLSIZE (0.8f)
1565 #define SQRT(x) sqrt(x)
1568 * Local function prototypes (not defined in trackball.h)
1570 static float tb_project_to_sphere(float, float, float);
1571 static void normalize_quat(float [4]);
1582 vset(float *v, float x, float y, float z)
1590 vsub(const float *src1, const float *src2, float *dst)
1592 dst[0] = src1[0] - src2[0];
1593 dst[1] = src1[1] - src2[1];
1594 dst[2] = src1[2] - src2[2];
1598 vcopy(const float *v1, float *v2)
1601 for (i = 0 ; i < 3 ; i++)
1606 vcross(const float *v1, const float *v2, float *cross)
1610 temp[0] = (v1[1] * v2[2]) - (v1[2] * v2[1]);
1611 temp[1] = (v1[2] * v2[0]) - (v1[0] * v2[2]);
1612 temp[2] = (v1[0] * v2[1]) - (v1[1] * v2[0]);
1617 vlength(const float *v)
1619 float tmp = v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
1624 vscale(float *v, float div)
1634 vscale(v,1.0/vlength(v));
1638 vdot(const float *v1, const float *v2)
1640 return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2];
1644 vadd(const float *src1, const float *src2, float *dst)
1646 dst[0] = src1[0] + src2[0];
1647 dst[1] = src1[1] + src2[1];
1648 dst[2] = src1[2] + src2[2];
1652 * Given an axis and angle, compute quaternion.
1655 axis_to_quat(float a[3], float phi, float q[4])
1657 double sinphi2, cosphi2;
1658 double phi2 = phi/2.0;
1659 sinphi2 = sin(phi2);
1660 cosphi2 = cos(phi2);
1668 * Project an x,y pair onto a sphere of radius r OR a hyperbolic sheet
1669 * if we are away from the center of the sphere.
1672 tb_project_to_sphere(float r, float x, float y)
1678 if (d < r * 0.70710678118654752440) { /* Inside sphere */
1681 } else { /* On hyperbola */
1682 t = r / 1.41421356237309504880;
1689 * Quaternions always obey: a^2 + b^2 + c^2 + d^2 = 1.0
1690 * If they don't add up to 1.0, dividing by their magnitued will
1693 * Note: See the following for more information on quaternions:
1695 * - Shoemake, K., Animating rotation with quaternion curves, Computer
1696 * Graphics 19, No 3 (Proc. SIGGRAPH'85), 245-254, 1985.
1697 * - Pletinckx, D., Quaternion calculus as a basic tool in computer
1698 * graphics, The Visual Computer 5, 2-13, 1989.
1701 normalize_quat(float q[4])
1706 tmp = q[0]*q[0] + q[1]*q[1] + q[2]*q[2] + q[3]*q[3];
1707 mag = 1.0 / SQRT(tmp);
1708 for (i = 0; i < 4; i++)
1713 * Ok, simulate a track-ball. Project the points onto the virtual
1714 * trackball, then figure out the axis of rotation, which is the cross
1715 * product of P1 P2 and O P1 (O is the center of the ball, 0,0,0)
1716 * Note: This is a deformed trackball-- is a trackball in the center,
1717 * but is deformed into a hyperbolic sheet of rotation away from the
1718 * center. This particular function was chosen after trying out
1719 * several variations.
1721 * It is assumed that the arguments to this routine are in the range
1725 trackball(float q[4], float p1x, float p1y, float p2x, float p2y)
1727 float a[3]; /* Axis of rotation */
1728 float phi; /* how much to rotate about axis */
1729 float p1[3], p2[3], d[3];
1732 if (p1x == p2x && p1y == p2y) {
1740 * First, figure out z-coordinates for projection of P1 and P2 to
1743 vset(p1,p1x,p1y,tb_project_to_sphere(TRACKBALLSIZE,p1x,p1y));
1744 vset(p2,p2x,p2y,tb_project_to_sphere(TRACKBALLSIZE,p2x,p2y));
1747 * Now, we want the cross product of P1 and P2
1752 * Figure out how much to rotate around that axis.
1755 t = vlength(d) / (2.0*TRACKBALLSIZE);
1758 * Avoid problems with out-of-control values...
1760 if (t > 1.0) t = 1.0;
1761 if (t < -1.0) t = -1.0;
1762 phi = 2.0 * asin(t);
1764 axis_to_quat(a,phi,q);
1768 * Given two rotations, e1 and e2, expressed as quaternion rotations,
1769 * figure out the equivalent single rotation and stuff it into dest.
1771 * This routine also normalizes the result every RENORMCOUNT times it is
1772 * called, to keep error from creeping in.
1774 * NOTE: This routine is written so that q1 or q2 may be the same
1775 * as dest (or each other).
1778 #define RENORMCOUNT 97
1781 add_quats(float q1[4], float q2[4], float dest[4])
1784 float t1[4], t2[4], t3[4];
1788 printf("q1 = %f %f %f %f\n", q1[0], q1[1], q1[2], q1[3]);
1789 printf("q2 = %f %f %f %f\n", q2[0], q2[1], q2[2], q2[3]);
1801 tf[3] = q1[3] * q2[3] - vdot(q1,q2);
1804 printf("tf = %f %f %f %f\n", tf[0], tf[1], tf[2], tf[3]);
1812 if (++count > RENORMCOUNT) {
1814 normalize_quat(dest);
1819 * Build a rotation matrix, given a quaternion rotation.
1823 build_rotmatrix(float m[4][4], float q[4])
1825 //#define TRANSPOSED_QUAT
1826 #ifndef TRANSPOSED_QUAT
1827 m[0][0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2]);
1828 m[0][1] = 2.0 * (q[0] * q[1] - q[2] * q[3]);
1829 m[0][2] = 2.0 * (q[2] * q[0] + q[1] * q[3]);
1832 m[1][0] = 2.0 * (q[0] * q[1] + q[2] * q[3]);
1833 m[1][1]= 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0]);
1834 m[1][2] = 2.0 * (q[1] * q[2] - q[0] * q[3]);
1837 m[2][0] = 2.0 * (q[2] * q[0] - q[1] * q[3]);
1838 m[2][1] = 2.0 * (q[1] * q[2] + q[0] * q[3]);
1839 m[2][2] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0]);
1846 #else // TRANSPOSED_QUAT
1847 m[0][0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2]);
1848 m[0][1] = 2.0 * (q[0] * q[1] + q[2] * q[3]);
1849 m[0][2] = 2.0 * (q[2] * q[0] - q[1] * q[3]);
1852 m[1][0] = 2.0 * (q[0] * q[1] - q[2] * q[3]);
1853 m[1][1] = 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0]);
1854 m[1][2] = 2.0 * (q[1] * q[2] + q[0] * q[3]);
1857 m[2][0] = 2.0 * (q[2] * q[0] + q[1] * q[3]);
1858 m[2][1] = 2.0 * (q[1] * q[2] - q[0] * q[3]);
1859 m[2][2] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0]);