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/bfi.hxx>
68 #include <Main/fg_init.hxx>
69 #include <Main/globals.hxx>
70 #include <Main/options.hxx>
71 #include <Main/views.hxx>
72 #include <Main/save.hxx>
74 #include <NetworkOLK/network.h>
77 #if defined( WIN32 ) && !defined( __CYGWIN__ )
78 # include <simgear/screen/win32-printer.h>
79 # include <simgear/screen/GlBitmaps.h>
84 * A virtual trackball implementation
85 * Written by Gavin Bell for Silicon Graphics, November 1988.
88 * Pass the x and y coordinates of the last and current positions of
89 * the mouse, scaled so they are from (-1.0 ... 1.0).
91 * The resulting rotation is returned as a quaternion rotation in the
95 trackball(float q[4], float p1x, float p1y, float p2x, float p2y);
98 * Given two quaternions, add them together to get a third quaternion.
99 * Adding quaternions to get a compound rotation is analagous to adding
100 * translations to get a compound translation. When incrementally
101 * adding rotations, the first argument here should be the new
103 * rotation, the second and third the total rotation (which will be
104 * over-written with the resulting new total rotation).
107 add_quats(float *q1, float *q2, float *dest);
110 * A useful function, builds a rotation matrix in Matrix based on
114 build_rotmatrix(float m[4][4], float q[4]);
117 * This function computes a quaternion based on an axis (defined by
118 * the given vector) and an angle about which to rotate. The angle is
119 * expressed in radians. The result is put into the third argument.
122 axis_to_quat(float a[3], float phi, float q[4]);
127 FG_USING_STD(string);
129 #ifndef FG_HAVE_NATIVE_SGI_COMPILERS
133 #if defined(WIN32) || defined(__CYGWIN32__)
134 #define WIN32_CURSOR_TWEAKS
135 #elif (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
136 #define X_CURSOR_TWEAKS
139 // hack, should come from an include someplace
140 extern void fgInitVisuals( void );
141 extern void fgReshape( int width, int height );
142 extern void fgRenderFrame( void );
145 fntTexFont *guiFntHandle = 0;
147 static puMenuBar *mainMenuBar = 0;
148 //static puButton *hideMenuButton = 0;
150 static puDialogBox *dialogBox = 0;
151 static puFrame *dialogFrame = 0;
152 static puText *dialogBoxMessage = 0;
153 static puOneShot *dialogBoxOkButton = 0;
156 static puDialogBox *YNdialogBox = 0;
157 static puFrame *YNdialogFrame = 0;
158 static puText *YNdialogBoxMessage = 0;
159 static puOneShot *YNdialogBoxOkButton = 0;
160 static puOneShot *YNdialogBoxNoButton = 0;
162 static char msg_OK[] = "OK";
163 static char msg_NO[] = "NO";
164 static char msg_YES[] = "YES";
165 static char msg_CANCEL[] = "Cancel";
166 static char msg_RESET[] = "Reset";
168 char *gui_msg_OK; // "OK"
169 char *gui_msg_NO; // "NO"
170 char *gui_msg_YES; // "YES"
171 char *gui_msg_CANCEL; // "CANCEL"
172 char *gui_msg_RESET; // "RESET"
174 static char global_dialog_string[256];
176 // from autopilot.cxx
177 // extern void NewAltitude( puObject *cb );
178 // extern void NewHeading( puObject *cb );
179 // extern void fgAPAdjust( puObject * );
180 // extern void NewTgtAirport( puObject *cb );
181 // bool fgAPTerrainFollowEnabled( void );
182 // bool fgAPAltitudeEnabled( void );
183 // bool fgAPHeadingEnabled( void );
184 // bool fgAPWayPointEnabled( void );
185 // bool fgAPAutoThrottleEnabled( void );
188 extern void fgLatLonFormatToggle( puObject *);
190 /* --------------------------------------------------------------------
192 ---------------------------------------------------------------------*/
196 static int _savedX = 0;
197 static int _savedY = 0;
198 static int last_buttons = 0 ;
199 static int mouse_active = 0;
200 static int menu_on = 0;
201 static int mouse_joystick_control = 0;
203 //static time_t mouse_off_time;
204 //static int mouse_timed_out;
206 // to allow returning to previous view
207 // on second left click in MOUSE_VIEW mode
208 // This has file scope so that it can be reset
209 // if the little rodent is moved NHV
210 static int _mVtoggle;
212 // we break up the glutGetModifiers return mask
213 // once per loop and stash what we need in these
214 static int glut_active_shift;
215 static int glut_active_ctrl;
216 static int glut_active_alt;
218 static float lastquat[4];
219 static float curquat[4];
220 static float _quat0[4];
221 float quat_mat[4][4];
223 // uncomment this for view to exactly follow mouse in MOUSE_VIEW mode
224 // else smooth out the view panning to .01 radian per frame
225 // see view_offset smoothing mechanism in main.cxx
226 #define NO_SMOOTH_MOUSE_VIEW
228 // uncomment following to
229 #define RESET_VIEW_ON_LEAVING_MOUSE_VIEW
231 /* --------------------------------------------------------------------
232 Support for mouse as control yoke (david@megginson.com)
234 - right button toggles between pointer and yoke
235 - horizontal drag with no buttons moves ailerons
236 - vertical drag with no buttons moves elevators
237 - horizontal drag with left button moves brakes (left=on)
238 - vertical drag with left button moves throttle (up=more)
239 - horizontal drag with middle button moves rudder
240 - vertical drag with middle button moves trim
242 For the *_sensitivity variables, a lower number means more sensitive.
244 TODO: figure out how to keep pointer from leaving window in yoke mode.
245 TODO: add thresholds and null zones
246 TODO: sensitivity should be configurable at user option.
247 TODO: allow differential braking (this will be useful if FlightGear
248 ever supports tail-draggers like the DC-3)
249 ---------------------------------------------------------------------*/
257 MouseMode mouse_mode = MOUSE_POINTER;
259 static double aileron_sensitivity = 1.0/500.0;
260 static double elevator_sensitivity = 1.0/500.0;
261 static double brake_sensitivity = 1.0/250.0;
262 static double throttle_sensitivity = 1.0/250.0;
263 static double rudder_sensitivity = 1.0/500.0;
264 static double trim_sensitivity = 1.0/1000.0;
266 static inline void Quat0( void ) {
267 curquat[0] = _quat0[0];
268 curquat[1] = _quat0[1];
269 curquat[2] = _quat0[2];
270 curquat[3] = _quat0[3];
273 static inline int left_button( void ) {
274 return( last_buttons & (1 << GLUT_LEFT_BUTTON) );
277 static inline int middle_button( void ) {
278 return( last_buttons & (1 << GLUT_MIDDLE_BUTTON) );
281 static inline int right_button( void ) {
282 return( last_buttons & (1 << GLUT_RIGHT_BUTTON) );
285 static inline void TurnCursorOn( void )
288 #if defined(WIN32_CURSOR_TWEAKS)
289 switch (mouse_mode) {
291 glutSetCursor(GLUT_CURSOR_INHERIT);
294 glutSetCursor(GLUT_CURSOR_CROSSHAIR);
297 glutSetCursor(GLUT_CURSOR_LEFT_RIGHT);
301 #if defined(X_CURSOR_TWEAKS)
302 glutWarpPointer( current_view.get_winWidth()/2, current_view.get_winHeight()/2);
306 static inline void TurnCursorOff( void )
309 #if defined(WIN32_CURSOR_TWEAKS)
310 glutSetCursor(GLUT_CURSOR_NONE);
311 #elif defined(X_CURSOR_TWEAKS)
312 glutWarpPointer( current_view.get_winWidth(), current_view.get_winHeight());
316 void maybeToggleMouse( void )
318 #if defined(WIN32_CURSOR_TWEAKS)
319 static int first_time = ~0;
320 static int mouse_changed = 0;
324 mouse_changed = ~mouse_changed;
328 if( mouse_mode != MOUSE_POINTER )
330 if( mouse_changed ) {
331 mouse_changed = ~mouse_changed;
337 first_time = ~first_time;
338 #endif // #ifdef WIN32
341 // Call with FALSE to init and TRUE to restore
342 void BusyCursor( int restore )
344 static GLenum cursor = (GLenum) 0;
346 glutSetCursor(cursor);
348 cursor = (GLenum) glutGet( (GLenum) GLUT_WINDOW_CURSOR );
349 #if defined(WIN32_CURSOR_TWEAKS)
352 glutSetCursor( GLUT_CURSOR_WAIT );
356 int guiGetMouseButton(void)
361 void guiGetMouse(int *x, int *y)
367 void guiMotionFunc ( int x, int y )
369 int ww, wh, need_warp = 0;
373 if (mouse_mode == MOUSE_POINTER) {
375 glutPostRedisplay () ;
377 if( x == _mX && y == _mY)
380 // reset left click MOUSE_VIEW toggle feature
383 ww = current_view.get_winWidth();
384 wh = current_view.get_winHeight();
386 switch (mouse_mode) {
388 if( !mouse_joystick_control ) {
389 mouse_joystick_control = 1;
390 current_options.set_control_mode( fgOPTIONS::FG_MOUSE );
392 if ( left_button() ) {
393 offset = (_mX - x) * brake_sensitivity;
394 controls.move_brake(FGControls::ALL_WHEELS, offset);
395 offset = (_mY - y) * throttle_sensitivity;
396 controls.move_throttle(FGControls::ALL_ENGINES, offset);
397 } else if ( right_button() ) {
398 if( ! current_autopilot->get_HeadingEnabled() ) {
399 offset = (x - _mX) * rudder_sensitivity;
400 controls.move_rudder(offset);
402 if( ! current_autopilot->get_AltitudeEnabled() ) {
403 offset = (_mY - y) * trim_sensitivity;
404 controls.move_elevator_trim(offset);
407 if( ! current_autopilot->get_HeadingEnabled() ) {
408 offset = (x - _mX) * aileron_sensitivity;
409 controls.move_aileron(offset);
411 if( ! current_autopilot->get_AltitudeEnabled() ) {
412 offset = (_mY - y) * elevator_sensitivity;
413 controls.move_elevator(offset);
417 // Keep the mouse in the window.
418 if (x < 5 || x > ww-5 || y < 5 || y > wh-5) {
427 #define CONTRAINED_MOUSE_VIEW_Y
428 #ifdef CONTRAINED_MOUSE_VIEW_Y
432 #endif // CONTRAINED_MOUSE_VIEW_Y
434 } else if( y >= wh-1) {
435 #ifdef CONTRAINED_MOUSE_VIEW_Y
439 #endif // CONTRAINED_MOUSE_VIEW_Y
442 // wrap MOUSE_VIEW mode cursor x position
446 } else if ( x >= ww-1 ) {
450 // try to get FG_PI movement in each half of screen
454 if( middle_button() ) {
456 (2.0f * _mX - W) / W,
457 0, //(H - 2.0f * y) / H, // 3
459 0 //(H - 2.0f * _mY) / H // 1
466 0, //(2.0f * _mX - W) / W, // 0
467 (H - 2.0f * y) / H, // 3
468 0, //(2.0f * x - W) / W, // 2
469 (H - 2.0f * _mY) / H // 1
472 add_quats(lastquat, curquat, curquat);
473 build_rotmatrix(quat_mat, curquat);
476 // this could be done in above quat
477 // but requires redoing view pipeline
478 offset = current_view.get_goal_view_offset();
479 offset += ((_mX - x) * FG_2PI / W );
480 while (offset < 0.0) {
483 while (offset > FG_2PI) {
486 current_view.set_goal_view_offset(offset);
487 #ifdef NO_SMOOTH_MOUSE_VIEW
488 current_view.set_view_offset(offset);
497 glutWarpPointer(x, y);
499 // Record the new mouse position.
505 void guiMouseFunc(int button, int updown, int x, int y)
509 // private MOUSE_VIEW state variables
510 // to allow alternate left clicks in MOUSE_VIEW mode
511 // to toggle between current offsets and straight ahead
513 static int _mVx, _mVy, _Vx, _Vy;
514 static float _quat[4];
515 static double _view_offset;
517 // general purpose variables
520 glutModifiers = glutGetModifiers();
521 glut_active_shift = glutModifiers & GLUT_ACTIVE_SHIFT;
522 glut_active_ctrl = glutModifiers & GLUT_ACTIVE_CTRL;
523 glut_active_alt = glutModifiers & GLUT_ACTIVE_ALT;
525 // Was the left button pressed?
526 if (updown == GLUT_DOWN ) {
527 if( button == GLUT_LEFT_BUTTON)
529 switch (mouse_mode) {
536 // resume previous view offsets
541 curquat[0] = _quat[0];
542 curquat[1] = _quat[1];
543 curquat[2] = _quat[2];
544 curquat[3] = _quat[3];
545 current_view.set_goal_view_offset(_view_offset);
546 #ifdef NO_SMOOTH_MOUSE_VIEW
547 current_view.set_view_offset(_view_offset);
555 _quat[0] = curquat[0];
556 _quat[1] = curquat[1];
557 _quat[2] = curquat[2];
558 _quat[3] = curquat[3];
559 x = current_view.get_winWidth()/2;
560 y = current_view.get_winHeight()/2;
562 _view_offset = current_view.get_goal_view_offset();
563 current_view.set_goal_view_offset(0.0);
564 #ifdef NO_SMOOTH_MOUSE_VIEW
565 current_view.set_view_offset(0.0);
568 glutWarpPointer( x , y);
569 build_rotmatrix(quat_mat, curquat);
570 _mVtoggle = ~_mVtoggle;
573 }else if ( button == GLUT_RIGHT_BUTTON) {
574 switch (mouse_mode) {
576 mouse_mode = MOUSE_YOKE;
577 mouse_joystick_control = 0;
580 // start with zero point in center of screen
581 _mX = current_view.get_winWidth()/2;
582 _mY = current_view.get_winHeight()/2;
584 // try to have the MOUSE_YOKE position
585 // reflect the current stick position
586 offset = controls.get_aileron();
587 x = _mX - (int)(offset * aileron_sensitivity);
588 offset = controls.get_elevator();
589 y = _mY - (int)(offset * elevator_sensitivity);
591 glutSetCursor(GLUT_CURSOR_CROSSHAIR);
592 FG_LOG( FG_INPUT, FG_INFO, "Mouse in yoke mode" );
596 mouse_mode = MOUSE_VIEW;
597 current_options.set_control_mode( fgOPTIONS::FG_JOYSTICK );
598 x = current_view.get_winWidth()/2;
599 y = current_view.get_winHeight()/2;
602 build_rotmatrix(quat_mat, curquat);
603 glutSetCursor(GLUT_CURSOR_LEFT_RIGHT);
604 FG_LOG( FG_INPUT, FG_INFO, "Mouse in view mode" );
608 mouse_mode = MOUSE_POINTER;
611 #ifdef RESET_VIEW_ON_LEAVING_MOUSE_VIEW
613 build_rotmatrix(quat_mat, curquat);
614 current_view.set_goal_view_offset(0.0);
615 #ifdef NO_SMOOTH_MOUSE_VIEW
616 current_view.set_view_offset(0.0);
618 #endif // RESET_VIEW_ON_LEAVING_MOUSE_VIEW
619 glutSetCursor(GLUT_CURSOR_INHERIT);
624 FG_LOG( FG_INPUT, FG_INFO, "Mouse in pointer mode" );
627 glutWarpPointer( x, y );
628 } // END RIGHT BUTTON
629 } // END UPDOWN == GLUT_DOWN
631 // Note which button is pressed.
632 if ( updown == GLUT_DOWN ) {
633 last_buttons |= ( 1 << button ) ;
635 last_buttons &= ~( 1 << button ) ;
638 // If we're in pointer mode, let PUI
639 // know what's going on.
640 if (mouse_mode == MOUSE_POINTER) {
641 if (!puMouse (button, updown, x,y)) {
642 current_panel->doMouseAction(button, updown, x, y);
646 // Register the new position (if it
647 // hasn't been registered already).
651 glutPostRedisplay ();
654 /* ================ General Purpose Functions ================ */
656 // Intercept the Escape Key
657 void ConfirmExitDialog(void)
659 FG_PUSH_PUI_DIALOG( YNdialogBox );
662 // General Purpose Message Box
663 void mkDialog (const char *txt)
665 strncpy(global_dialog_string, txt, 256);
666 dialogBoxMessage->setLabel(global_dialog_string);
667 FG_PUSH_PUI_DIALOG( dialogBox );
670 // Repair any damage done to the Panel by other Gui Items
671 void guiFixPanel( void )
673 #if 0 // this function does nothing anyway
674 bool freeze = globals->get_freeze();
676 if ( current_options.get_panel_status() ) {
677 // FGView *v = ¤t_view;
679 globals->set_freeze( true );
681 // we must have some something here at some point but this
682 // function does nothing now.
685 globals->set_freeze( false );
690 // Toggle the Menu and Mouse display state
691 void guiToggleMenu(void)
694 // printf("Hiding Menu\n");
695 mainMenuBar->hide ();
696 #if defined(WIN32_CURSOR_TWEAKS)
697 if( mouse_mode == MOUSE_POINTER )
699 #endif // #ifdef WIN32_CURSOR_TWEAKS
701 // printf("Showing Menu\n");
702 mainMenuBar->reveal();
705 #endif // #ifdef WIN32
710 /* -----------------------------------------------------------------------
711 the Gui callback functions
712 ____________________________________________________________________*/
714 static void saveFlight(puObject *cv)
717 ofstream output("fgfs.sav");
718 if (output.good() && fgSaveFlight(output)) {
720 mkDialog("Saved flight to ./fgfs.sav");
721 FG_LOG(FG_INPUT, FG_INFO, "Saved flight to fgfs.sav");
723 mkDialog("Cannot save flight to ./fgfs.sav");
724 FG_LOG(FG_INPUT, FG_ALERT, "Cannot save flight to fgfs.sav");
729 static void loadFlight(puObject *cb)
732 ifstream input("fgfs.sav");
733 if (input.good() && fgLoadFlight(input)) {
735 mkDialog("Loaded flight from fgfs.sav");
736 FG_LOG(FG_INPUT, FG_INFO, "Restored flight from ./fgfs.sav");
738 mkDialog("Failed to load flight from fgfs.sav");
739 FG_LOG(FG_INPUT, FG_ALERT, "Cannot load flight from ./fgfs.sav");
744 void reInit(puObject *cb)
748 build_rotmatrix(quat_mat, curquat);
749 fgReInitSubsystems();
753 static void toggleClouds(puObject *cb)
755 FGBFI::setClouds( !FGBFI::getClouds() );
758 // This is the accessor function
759 void guiTogglePanel(puObject *cb)
761 current_options.toggle_panel();
764 //void MenuHideMenuCb(puObject *cb)
765 void hideMenuCb (puObject *cb)
770 void goodBye(puObject *)
772 // FG_LOG( FG_INPUT, FG_ALERT,
773 // "Program exiting normally at user request." );
774 cout << "Program exiting normally at user request." << endl;
776 #ifdef FG_NETWORK_OLK
777 if ( current_options.get_network_olk() ) {
778 if ( net_is_registered == 0 ) fgd_send_com( "8", FGFS_host);
789 void goAwayCb (puObject *me)
791 FG_POP_PUI_DIALOG( dialogBox );
794 void mkDialogInit (void)
796 // printf("mkDialogInit\n");
797 int x = (current_options.get_xsize()/2 - 400/2);
798 int y = (current_options.get_ysize()/2 - 100/2);
799 dialogBox = new puDialogBox (x, y); // 150, 50
801 dialogFrame = new puFrame (0,0,400,100);
802 dialogBoxMessage = new puText (10, 70);
803 dialogBoxMessage -> setLabel ("");
804 dialogBoxOkButton = new puOneShot (180, 10, 240, 50);
805 dialogBoxOkButton -> setLegend (gui_msg_OK);
806 dialogBoxOkButton -> makeReturnDefault (TRUE );
807 dialogBoxOkButton -> setCallback (goAwayCb);
809 FG_FINALIZE_PUI_DIALOG( dialogBox );
812 void MayBeGoodBye(puObject *)
817 void goAwayYesNoCb(puObject *me)
819 FG_POP_PUI_DIALOG( YNdialogBox);
822 void ConfirmExitDialogInit(void)
824 char msg[] = "Really Quit";
827 // printf("ConfirmExitDialogInit\n");
828 int len = 200 - puGetStringWidth( puGetDefaultLabelFont(), msg )/2;
830 int x = (current_options.get_xsize()/2 - 400/2);
831 int y = (current_options.get_ysize()/2 - 100/2);
833 YNdialogBox = new puDialogBox (x, y); // 150, 50
834 // YNdialogBox = new puDialogBox (150, 50);
836 YNdialogFrame = new puFrame (0,0,400, 100);
838 YNdialogBoxMessage = new puText (len, 70);
839 YNdialogBoxMessage -> setDefaultValue (msg);
840 YNdialogBoxMessage -> getDefaultValue (&s);
841 YNdialogBoxMessage -> setLabel (s);
843 YNdialogBoxOkButton = new puOneShot (100, 10, 160, 50);
844 YNdialogBoxOkButton -> setLegend (gui_msg_OK);
845 YNdialogBoxOkButton -> makeReturnDefault (TRUE );
846 YNdialogBoxOkButton -> setCallback (goodBye);
848 YNdialogBoxNoButton = new puOneShot (240, 10, 300, 50);
849 YNdialogBoxNoButton -> setLegend (gui_msg_NO);
850 YNdialogBoxNoButton -> setCallback (goAwayYesNoCb);
852 FG_FINALIZE_PUI_DIALOG( YNdialogBox );
855 void notCb (puObject *)
857 mkDialog ("This function isn't implemented yet");
860 void helpCb (puObject *)
864 #if defined(FX) && !defined(WIN32)
865 # if defined(XMESA_FX_FULLSCREEN) && defined(XMESA_FX_WINDOW)
866 if ( global_fullscreen ) {
867 global_fullscreen = false;
868 XMesaSetFXmode( XMESA_FX_WINDOW );
874 string url = "http://www.flightgear.org/Docs/InstallGuide/getstart.html";
876 if ( system("xwininfo -name Netscape > /dev/null 2>&1") == 0 ) {
877 command = "netscape -remote \"openURL(" + url + ")\" &";
879 command = "netscape " + url + " &";
882 command = "webrun.bat";
885 system( command.c_str() );
886 //string text = "Help started in netscape window.";
888 //mkDialog (text.c_str());
889 mkDialog ("Help started in netscape window.");
892 #if defined( WIN32 ) && !defined( __CYGWIN__)
894 static void rotateView( double roll, double pitch, double yaw )
899 static GlBitmap *b1 = NULL;
900 extern FGInterface cur_view_fdm;
901 GLubyte *hiResScreenCapture( int multiplier )
903 float oldfov = current_options.get_fov();
904 float fov = oldfov / multiplier;
905 FGView *v = ¤t_view;
906 current_options.set_fov(fov);
907 v->force_update_fov_math();
909 int cur_width = current_view.get_winWidth( );
910 int cur_height = current_view.get_winHeight( );
911 if (b1) delete( b1 );
912 // New empty (mostly) bitmap
913 b1 = new GlBitmap( GL_RGB, 1, 1, (unsigned char *)"123" );
915 for ( y = 0; y < multiplier; y++ )
917 for ( x = 0; x < multiplier; x++ )
919 fgReshape( cur_width, cur_height );
921 rotateView( 0, (y*fov)-((multiplier-1)*fov/2), (x*fov)-((multiplier-1)*fov/2) );
925 b1->copyBitmap( &b2, cur_width*x, cur_height*y );
928 current_view.UpdateViewParams(cur_view_fdm);
929 current_options.set_fov(oldfov);
930 v->force_update_fov_math();
931 return b1->getBitmap();
936 #if defined( WIN32 ) && !defined( __CYGWIN__)
937 // win32 print screen function
938 void printScreen ( puObject *obj ) {
939 bool show_pu_cursor = false;
941 if ( !puCursorIsHidden() ) {
942 show_pu_cursor = true;
948 CGlPrinter p( CGlPrinter::PRINT_BITMAP );
949 int cur_width = current_view.get_winWidth( );
950 int cur_height = current_view.get_winHeight( );
951 p.Begin( "FlightGear", cur_width*3, cur_height*3 );
952 p.End( hiResScreenCapture(3) );
955 mainMenuBar->reveal();
958 if ( show_pu_cursor ) {
963 #endif // #ifdef WIN32
966 void dumpSnapShot ( puObject *obj ) {
971 // do a screen snap shot
972 void fgDumpSnapShot () {
973 bool show_pu_cursor = false;
975 int freeze = globals->get_freeze();
977 globals->set_freeze( true );
981 if ( !puCursorIsHidden() ) {
982 show_pu_cursor = true;
987 fgReshape( current_view.get_winWidth(), current_view.get_winHeight() );
989 // we need two render frames here to clear the menu and cursor
990 // ... not sure why but doing an extra fgFenderFrame() shoulnd't
995 my_glDumpWindow( "fgfs-screen.ppm",
996 current_options.get_xsize(),
997 current_options.get_ysize() );
999 mkDialog ("Snap shot saved to fgfs-screen.ppm");
1001 if ( show_pu_cursor ) {
1007 mainMenuBar->reveal();
1011 globals->set_freeze( false );
1015 /// The beginnings of teleportation :-)
1016 // Needs cleaning up but works
1017 // These statics should disapear when this is a class
1018 static puDialogBox *AptDialog = 0;
1019 static puFrame *AptDialogFrame = 0;
1020 static puText *AptDialogMessage = 0;
1021 static puInput *AptDialogInput = 0;
1023 static char NewAirportId[16];
1024 static char NewAirportLabel[] = "Enter New Airport ID";
1026 static puOneShot *AptDialogOkButton = 0;
1027 static puOneShot *AptDialogCancelButton = 0;
1028 static puOneShot *AptDialogResetButton = 0;
1030 void AptDialog_Cancel(puObject *)
1032 FG_POP_PUI_DIALOG( AptDialog );
1035 void AptDialog_OK (puObject *)
1037 FGPath path( current_options.get_fg_root() );
1038 path.append( "Airports" );
1039 path.append( "simple.mk4" );
1040 FGAirports airports( path.c_str() );
1044 int freeze = globals->get_freeze();
1046 globals->set_freeze( true );
1049 AptDialogInput->getValue(&s);
1052 cout << "AptDialog_OK " << AptId << " " << AptId.length() << endl;
1054 AptDialog_Cancel( NULL );
1056 if ( AptId.length() ) {
1057 // set initial position from airport id
1058 FG_LOG( FG_GENERAL, FG_INFO,
1059 "Attempting to set starting position from airport code "
1062 if ( airports.search( AptId, &a ) )
1064 current_options.set_airport_id( AptId.c_str() );
1066 fgReInitSubsystems();
1069 AptId += " not in database.";
1070 mkDialog(AptId.c_str());
1074 globals->set_freeze( false );
1077 void AptDialog_Reset(puObject *)
1079 // strncpy( NewAirportId, current_options.get_airport_id().c_str(), 16 );
1080 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1081 AptDialogInput->setValue ( NewAirportId );
1082 AptDialogInput->setCursor( 0 ) ;
1085 void NewAirport(puObject *cb)
1087 // strncpy( NewAirportId, current_options.get_airport_id().c_str(), 16 );
1088 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1089 // cout << "NewAirport " << NewAirportId << endl;
1090 AptDialogInput->setValue( NewAirportId );
1092 FG_PUSH_PUI_DIALOG( AptDialog );
1095 static void NewAirportInit(void)
1097 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1098 int len = 150 - puGetStringWidth( puGetDefaultLabelFont(),
1099 NewAirportLabel ) / 2;
1101 AptDialog = new puDialogBox (150, 50);
1103 AptDialogFrame = new puFrame (0,0,350, 150);
1104 AptDialogMessage = new puText (len, 110);
1105 AptDialogMessage -> setLabel (NewAirportLabel);
1107 AptDialogInput = new puInput (50, 70, 300, 100);
1108 AptDialogInput -> setValue (NewAirportId);
1109 AptDialogInput -> acceptInput();
1111 AptDialogOkButton = new puOneShot (50, 10, 110, 50);
1112 AptDialogOkButton -> setLegend (gui_msg_OK);
1113 AptDialogOkButton -> setCallback (AptDialog_OK);
1114 AptDialogOkButton -> makeReturnDefault(TRUE);
1116 AptDialogCancelButton = new puOneShot (140, 10, 210, 50);
1117 AptDialogCancelButton -> setLegend (gui_msg_CANCEL);
1118 AptDialogCancelButton -> setCallback (AptDialog_Cancel);
1120 AptDialogResetButton = new puOneShot (240, 10, 300, 50);
1121 AptDialogResetButton -> setLegend (gui_msg_RESET);
1122 AptDialogResetButton -> setCallback (AptDialog_Reset);
1124 cout << "NewAirportInit " << NewAirportId << endl;
1125 FG_FINALIZE_PUI_DIALOG( AptDialog );
1128 #ifdef FG_NETWORK_OLK
1130 /// The beginnings of networking :-)
1131 // Needs cleaning up but works
1132 // These statics should disapear when this is a class
1133 static puDialogBox *NetIdDialog = 0;
1134 static puFrame *NetIdDialogFrame = 0;
1135 static puText *NetIdDialogMessage = 0;
1136 static puInput *NetIdDialogInput = 0;
1138 static char NewNetId[16];
1139 static char NewNetIdLabel[] = "Enter New Callsign";
1140 extern char *fgd_callsign;
1142 static puOneShot *NetIdDialogOkButton = 0;
1143 static puOneShot *NetIdDialogCancelButton = 0;
1145 void NetIdDialog_Cancel(puObject *)
1147 FG_POP_PUI_DIALOG( NetIdDialog );
1150 void NetIdDialog_OK (puObject *)
1154 bool freeze = globals->get_freeze();
1156 globals->set_freeze( true );
1158 The following needs some cleanup because
1159 "string options.NetId" and "char *net_callsign"
1161 NetIdDialogInput->getValue(&net_callsign);
1162 NetId = net_callsign;
1164 NetIdDialog_Cancel( NULL );
1165 current_options.set_net_id( NetId.c_str() );
1166 strcpy( fgd_callsign, net_callsign);
1167 // strcpy( fgd_callsign, current_options.get_net_id().c_str());
1168 /* Entering a callsign indicates : user wants Net HUD Info */
1169 net_hud_display = 1;
1172 globals->set_freeze( false );
1175 void NewCallSign(puObject *cb)
1177 sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1178 // sprintf( NewNetId, "%s", fgd_callsign );
1179 NetIdDialogInput->setValue( NewNetId );
1181 FG_PUSH_PUI_DIALOG( NetIdDialog );
1184 static void NewNetIdInit(void)
1186 sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1187 // sprintf( NewNetId, "%s", fgd_callsign );
1188 int len = 150 - puGetStringWidth( puGetDefaultLabelFont(),
1189 NewNetIdLabel ) / 2;
1191 NetIdDialog = new puDialogBox (150, 50);
1193 NetIdDialogFrame = new puFrame (0,0,350, 150);
1194 NetIdDialogMessage = new puText (len, 110);
1195 NetIdDialogMessage -> setLabel (NewNetIdLabel);
1197 NetIdDialogInput = new puInput (50, 70, 300, 100);
1198 NetIdDialogInput -> setValue (NewNetId);
1199 NetIdDialogInput -> acceptInput();
1201 NetIdDialogOkButton = new puOneShot (50, 10, 110, 50);
1202 NetIdDialogOkButton -> setLegend (gui_msg_OK);
1203 NetIdDialogOkButton -> setCallback (NetIdDialog_OK);
1204 NetIdDialogOkButton -> makeReturnDefault(TRUE);
1206 NetIdDialogCancelButton = new puOneShot (240, 10, 300, 50);
1207 NetIdDialogCancelButton -> setLegend (gui_msg_CANCEL);
1208 NetIdDialogCancelButton -> setCallback (NetIdDialog_Cancel);
1211 FG_FINALIZE_PUI_DIALOG( NetIdDialog );
1214 static void net_display_toggle( puObject *cb)
1216 net_hud_display = (net_hud_display) ? 0 : 1;
1217 printf("Toggle net_hud_display : %d\n", net_hud_display);
1220 static void net_register( puObject *cb)
1222 fgd_send_com( "1", FGFS_host );
1223 net_is_registered = 0;
1224 printf("Registering to deamon\n");
1227 static void net_unregister( puObject *cb)
1229 fgd_send_com( "8", FGFS_host );
1230 net_is_registered = -1;
1231 printf("Unregistering from deamon\n");
1235 /*************** Deamon communication **********/
1237 // These statics should disapear when this is a class
1238 static puDialogBox *NetFGDDialog = 0;
1239 static puFrame *NetFGDDialogFrame = 0;
1240 static puText *NetFGDDialogMessage = 0;
1241 //static puInput *NetFGDDialogInput = 0;
1243 //static char NewNetId[16];
1244 static char NewNetFGDLabel[] = "Scan for deamon ";
1245 static char NewFGDHost[64] = "olk.mcp.de";
1246 static int NewFGDPortLo = 10000;
1247 static int NewFGDPortHi = 10001;
1249 //extern char *fgd_callsign;
1250 extern u_short base_port, end_port;
1251 extern int fgd_ip, verbose, current_port;
1252 extern char *fgd_host;
1255 static puOneShot *NetFGDDialogOkButton = 0;
1256 static puOneShot *NetFGDDialogCancelButton = 0;
1257 static puOneShot *NetFGDDialogScanButton = 0;
1259 static puInput *NetFGDHostDialogInput = 0;
1260 static puInput *NetFGDPortLoDialogInput = 0;
1261 static puInput *NetFGDPortHiDialogInput = 0;
1263 void NetFGDDialog_Cancel(puObject *)
1265 FG_POP_PUI_DIALOG( NetFGDDialog );
1268 void NetFGDDialog_OK (puObject *)
1272 bool freeze = globals->get_freeze();
1274 globals->set_freeze( true );
1275 NetFGDHostDialogInput->getValue( &NetFGD );
1276 strcpy( fgd_host, NetFGD);
1277 NetFGDPortLoDialogInput->getValue( (int *) &base_port );
1278 NetFGDPortHiDialogInput->getValue( (int *) &end_port );
1279 NetFGDDialog_Cancel( NULL );
1281 globals->set_freeze( false );
1284 void NetFGDDialog_SCAN (puObject *)
1289 bool freeze = globals->get_freeze();
1291 globals->set_freeze( true );
1292 // printf("Vor getvalue %s\n");
1293 NetFGDHostDialogInput->getValue( &NetFGD );
1294 // printf("Vor strcpy %s\n", (char *) NetFGD);
1295 strcpy( fgd_host, NetFGD);
1296 NetFGDPortLoDialogInput->getValue( (int *) &base_port );
1297 NetFGDPortHiDialogInput->getValue( (int *) &end_port );
1298 printf("FGD: %s Port-Start: %d Port-End: %d\n", fgd_host,
1299 base_port, end_port);
1300 net_resolv_fgd(fgd_host);
1301 printf("Resolve : %d\n", net_r);
1303 globals->set_freeze( false );
1306 strcpy( fgd_name, "");
1307 for( current_port = base_port; ( current_port <= end_port); current_port++) {
1308 fgd_send_com("0" , FGFS_host);
1309 sprintf( NewNetFGDLabel , "Scanning for deamon Port: %d", current_port);
1310 printf("FGD: searching %s\n", fgd_name);
1311 if ( strcmp( fgd_name, "") != 0 ) {
1312 sprintf( NewNetFGDLabel , "Found %s at Port: %d",
1313 fgd_name, current_port);
1314 fgd_port = current_port;
1315 current_port = end_port+1;
1318 current_port = end_port = base_port = fgd_port;
1320 NetFGDDialog_Cancel( NULL );
1324 void net_fgd_scan(puObject *cb)
1326 NewFGDPortLo = base_port;
1327 NewFGDPortHi = end_port;
1328 strcpy( NewFGDHost, fgd_host);
1329 NetFGDPortLoDialogInput->setValue( NewFGDPortLo );
1330 NetFGDPortHiDialogInput->setValue( NewFGDPortHi );
1331 NetFGDHostDialogInput->setValue( NewFGDHost );
1333 FG_PUSH_PUI_DIALOG( NetFGDDialog );
1337 static void NewNetFGDInit(void)
1339 // sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1340 // sprintf( NewNetId, "%s", fgd_callsign );
1341 int len = 170 - puGetStringWidth( puGetDefaultLabelFont(),
1342 NewNetFGDLabel ) / 2;
1344 NetFGDDialog = new puDialogBox (310, 30);
1346 NetFGDDialogFrame = new puFrame (0,0,320, 170);
1347 NetFGDDialogMessage = new puText (len, 140);
1348 NetFGDDialogMessage -> setLabel (NewNetFGDLabel);
1350 NetFGDPortLoDialogInput = new puInput (50, 70, 127, 100);
1351 NetFGDPortLoDialogInput -> setValue (NewFGDPortLo);
1352 NetFGDPortLoDialogInput -> acceptInput();
1354 NetFGDPortHiDialogInput = new puInput (199, 70, 275, 100);
1355 NetFGDPortHiDialogInput -> setValue (NewFGDPortHi);
1356 NetFGDPortHiDialogInput -> acceptInput();
1358 NetFGDHostDialogInput = new puInput (50, 100, 275, 130);
1359 NetFGDHostDialogInput -> setValue (NewFGDHost);
1360 NetFGDHostDialogInput -> acceptInput();
1362 NetFGDDialogScanButton = new puOneShot (130, 10, 200, 50);
1363 NetFGDDialogScanButton -> setLegend ("Scan");
1364 NetFGDDialogScanButton -> setCallback (NetFGDDialog_SCAN);
1365 NetFGDDialogScanButton -> makeReturnDefault(FALSE);
1367 NetFGDDialogOkButton = new puOneShot (50, 10, 120, 50);
1368 NetFGDDialogOkButton -> setLegend (gui_msg_OK);
1369 NetFGDDialogOkButton -> setCallback (NetFGDDialog_OK);
1370 NetFGDDialogOkButton -> makeReturnDefault(TRUE);
1372 NetFGDDialogCancelButton = new puOneShot (210, 10, 280, 50);
1373 NetFGDDialogCancelButton -> setLegend (gui_msg_CANCEL);
1374 NetFGDDialogCancelButton -> setCallback (NetFGDDialog_Cancel);
1377 FG_FINALIZE_PUI_DIALOG( NetFGDDialog );
1381 static void net_display_toggle( puObject *cb)
1383 net_hud_display = (net_hud_display) ? 0 : 1;
1384 printf("Toggle net_hud_display : %d\n", net_hud_display);
1391 /*************** End Networking **************/
1395 /* -----------------------------------------------------------------------
1397 ---------------------------------------------------------------------*/
1398 char *fileSubmenu [] = {
1399 "Exit", /* "Close", "---------", */
1400 #if defined( WIN32 ) && !defined( __CYGWIN__)
1410 puCallback fileSubmenuCb [] = {
1411 MayBeGoodBye, /* hideMenuCb, NULL, */
1412 #if defined( WIN32 ) && !defined( __CYGWIN__)
1425 char *editSubmenu [] = {
1428 puCallback editSubmenuCb [] = {
1433 extern void fgHUDalphaAdjust( puObject * );
1434 char *viewSubmenu [] = {
1436 /* "Cockpit View > ", "View >","------------", */
1437 "Toggle Panel...", NULL
1439 puCallback viewSubmenuCb [] = {
1441 /* notCb, notCb, NULL, */
1442 guiTogglePanel, NULL
1445 char *aircraftSubmenu [] = {
1446 "Autopilot", "Heading", "Altitude", "Navigation", "Airport",
1447 /* "Communication", */ NULL
1449 puCallback aircraftSubmenuCb [] = {
1450 fgAPAdjust, NewHeading, NewAltitude, fgLatLonFormatToggle, NewTgtAirport,
1454 char *environmentSubmenu [] = {
1456 "Goto Airport", /* "Terrain", "Weather", */ NULL
1458 puCallback environmentSubmenuCb [] = {
1460 NewAirport, /* notCb, notCb, */ NULL
1464 char *optionsSubmenu [] = {
1465 "Preferences", "Realism & Reliablity...", NULL
1467 puCallback optionsSubmenuCb [] = {
1472 #ifdef FG_NETWORK_OLK
1473 char *networkSubmenu [] = {
1474 "Unregister from FGD ", /* "Send MSG to All", "Send MSG", "Show Pilots", */
1476 "Scan for Deamons", "Enter Callsign", /* "Display Netinfos", */
1477 "Toggle Display", NULL
1479 puCallback networkSubmenuCb [] = {
1480 /* notCb, notCb, notCb, notCb, */
1483 net_fgd_scan, NewCallSign,
1484 net_display_toggle, NULL
1488 char *helpSubmenu [] = {
1489 /* "About...", */ "Help", NULL
1491 puCallback helpSubmenuCb [] = {
1492 /* notCb, */ helpCb, NULL
1496 /* -------------------------------------------------------------------------
1498 _____________________________________________________________________*/
1503 char *mesa_win_state;
1507 puSetDefaultStyle ( PUSTYLE_SMALL_BEVELLED ); //PUSTYLE_DEFAULT
1508 puSetDefaultColourScheme (0.8, 0.8, 0.8, 0.4);
1510 // Initialize our GLOBAL GUI STRINGS
1511 gui_msg_OK = msg_OK; // "OK"
1512 gui_msg_NO = msg_NO; // "NO"
1513 gui_msg_YES = msg_YES; // "YES"
1514 gui_msg_CANCEL = msg_CANCEL; // "CANCEL"
1515 gui_msg_RESET = msg_RESET; // "RESET"
1517 // Next check home directory
1519 char* envp = ::getenv( "FG_FONTS" );
1520 if ( envp != NULL ) {
1521 fntpath.set( envp );
1523 fntpath.set( current_options.get_fg_root() );
1524 fntpath.append( "Fonts" );
1527 // Install our fast fonts
1528 fntpath.append( "typewriter.txf" );
1529 guiFntHandle = new fntTexFont ;
1530 guiFntHandle -> load ( (char *)fntpath.c_str() ) ;
1531 puFont GuiFont ( guiFntHandle, 15 ) ;
1532 puSetDefaultFonts( GuiFont, GuiFont ) ;
1533 guiFnt = puGetDefaultLabelFont();
1535 if ( current_options.get_mouse_pointer() == 0 ) {
1536 // no preference specified for mouse pointer, attempt to autodetect...
1537 // Determine if we need to render the cursor, or if the windowing
1538 // system will do it. First test if we are rendering with glide.
1539 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1540 // Test for the MESA_GLX_FX env variable
1541 if ( (mesa_win_state = getenv( "MESA_GLX_FX" )) != NULL) {
1542 // test if we are fullscreen mesa/glide
1543 if ( (mesa_win_state[0] == 'f') ||
1544 (mesa_win_state[0] == 'F') ) {
1549 mouse_active = ~mouse_active;
1550 } else if ( current_options.get_mouse_pointer() == 1 ) {
1551 // don't show pointer
1552 } else if ( current_options.get_mouse_pointer() == 2 ) {
1553 // force showing pointer
1555 mouse_active = ~mouse_active;
1558 // MOUSE_VIEW mode stuff
1559 trackball(_quat0, 0.0, 0.0, 0.0, 0.0);
1561 build_rotmatrix(quat_mat, curquat);
1563 // Set up our Dialog Boxes
1564 ConfirmExitDialogInit();
1566 #ifdef FG_NETWORK_OLK
1572 // Make the menu bar
1573 mainMenuBar = new puMenuBar ();
1574 mainMenuBar -> add_submenu ("File", fileSubmenu, fileSubmenuCb);
1575 // mainMenuBar -> add_submenu ("Edit", editSubmenu, editSubmenuCb);
1576 mainMenuBar -> add_submenu ("View", viewSubmenu, viewSubmenuCb);
1577 mainMenuBar -> add_submenu ("Aircraft", aircraftSubmenu, aircraftSubmenuCb);
1578 mainMenuBar -> add_submenu ("Environment", environmentSubmenu, environmentSubmenuCb);
1579 // mainMenuBar -> add_submenu ("Options", optionsSubmenu, optionsSubmenuCb);
1580 #ifdef FG_NETWORK_OLK
1581 mainMenuBar -> add_submenu ("Network", networkSubmenu, networkSubmenuCb);
1583 mainMenuBar -> add_submenu ("Help", helpSubmenu, helpSubmenuCb);
1584 mainMenuBar-> close ();
1585 // Set up menu bar toggle
1594 * Implementation of a virtual trackball.
1595 * Implemented by Gavin Bell, lots of ideas from Thant Tessman and
1596 * the August '88 issue of Siggraph's "Computer Graphics," pp. 121-129.
1598 * Vector manip code:
1600 * Original code from:
1601 * David M. Ciemiewicz, Mark Grossman, Henry Moreton, and Paul Haeberli
1603 * Much mucking with by:
1606 #if defined(_WIN32) && !defined( __CYGWIN32__ )
1607 #pragma warning (disable:4244) /* disable bogus conversion warnings */
1611 //#include "trackball.h"
1614 * This size should really be based on the distance from the center of
1615 * rotation to the point on the object underneath the mouse. That
1616 * point would then track the mouse as closely as possible. This is a
1617 * simple example, though, so that is left as an Exercise for the
1620 #define TRACKBALLSIZE (0.8f)
1621 #define SQRT(x) sqrt(x)
1624 * Local function prototypes (not defined in trackball.h)
1626 static float tb_project_to_sphere(float, float, float);
1627 static void normalize_quat(float [4]);
1638 vset(float *v, float x, float y, float z)
1646 vsub(const float *src1, const float *src2, float *dst)
1648 dst[0] = src1[0] - src2[0];
1649 dst[1] = src1[1] - src2[1];
1650 dst[2] = src1[2] - src2[2];
1654 vcopy(const float *v1, float *v2)
1657 for (i = 0 ; i < 3 ; i++)
1662 vcross(const float *v1, const float *v2, float *cross)
1666 temp[0] = (v1[1] * v2[2]) - (v1[2] * v2[1]);
1667 temp[1] = (v1[2] * v2[0]) - (v1[0] * v2[2]);
1668 temp[2] = (v1[0] * v2[1]) - (v1[1] * v2[0]);
1673 vlength(const float *v)
1675 float tmp = v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
1680 vscale(float *v, float div)
1690 vscale(v,1.0/vlength(v));
1694 vdot(const float *v1, const float *v2)
1696 return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2];
1700 vadd(const float *src1, const float *src2, float *dst)
1702 dst[0] = src1[0] + src2[0];
1703 dst[1] = src1[1] + src2[1];
1704 dst[2] = src1[2] + src2[2];
1708 * Given an axis and angle, compute quaternion.
1711 axis_to_quat(float a[3], float phi, float q[4])
1713 double sinphi2, cosphi2;
1714 double phi2 = phi/2.0;
1715 sinphi2 = sin(phi2);
1716 cosphi2 = cos(phi2);
1724 * Project an x,y pair onto a sphere of radius r OR a hyperbolic sheet
1725 * if we are away from the center of the sphere.
1728 tb_project_to_sphere(float r, float x, float y)
1734 if (d < r * 0.70710678118654752440) { /* Inside sphere */
1737 } else { /* On hyperbola */
1738 t = r / 1.41421356237309504880;
1745 * Quaternions always obey: a^2 + b^2 + c^2 + d^2 = 1.0
1746 * If they don't add up to 1.0, dividing by their magnitued will
1749 * Note: See the following for more information on quaternions:
1751 * - Shoemake, K., Animating rotation with quaternion curves, Computer
1752 * Graphics 19, No 3 (Proc. SIGGRAPH'85), 245-254, 1985.
1753 * - Pletinckx, D., Quaternion calculus as a basic tool in computer
1754 * graphics, The Visual Computer 5, 2-13, 1989.
1757 normalize_quat(float q[4])
1762 tmp = q[0]*q[0] + q[1]*q[1] + q[2]*q[2] + q[3]*q[3];
1763 mag = 1.0 / SQRT(tmp);
1764 for (i = 0; i < 4; i++)
1769 * Ok, simulate a track-ball. Project the points onto the virtual
1770 * trackball, then figure out the axis of rotation, which is the cross
1771 * product of P1 P2 and O P1 (O is the center of the ball, 0,0,0)
1772 * Note: This is a deformed trackball-- is a trackball in the center,
1773 * but is deformed into a hyperbolic sheet of rotation away from the
1774 * center. This particular function was chosen after trying out
1775 * several variations.
1777 * It is assumed that the arguments to this routine are in the range
1781 trackball(float q[4], float p1x, float p1y, float p2x, float p2y)
1783 float a[3]; /* Axis of rotation */
1784 float phi; /* how much to rotate about axis */
1785 float p1[3], p2[3], d[3];
1788 if (p1x == p2x && p1y == p2y) {
1796 * First, figure out z-coordinates for projection of P1 and P2 to
1799 vset(p1,p1x,p1y,tb_project_to_sphere(TRACKBALLSIZE,p1x,p1y));
1800 vset(p2,p2x,p2y,tb_project_to_sphere(TRACKBALLSIZE,p2x,p2y));
1803 * Now, we want the cross product of P1 and P2
1808 * Figure out how much to rotate around that axis.
1811 t = vlength(d) / (2.0*TRACKBALLSIZE);
1814 * Avoid problems with out-of-control values...
1816 if (t > 1.0) t = 1.0;
1817 if (t < -1.0) t = -1.0;
1818 phi = 2.0 * asin(t);
1820 axis_to_quat(a,phi,q);
1824 * Given two rotations, e1 and e2, expressed as quaternion rotations,
1825 * figure out the equivalent single rotation and stuff it into dest.
1827 * This routine also normalizes the result every RENORMCOUNT times it is
1828 * called, to keep error from creeping in.
1830 * NOTE: This routine is written so that q1 or q2 may be the same
1831 * as dest (or each other).
1834 #define RENORMCOUNT 97
1837 add_quats(float q1[4], float q2[4], float dest[4])
1840 float t1[4], t2[4], t3[4];
1844 printf("q1 = %f %f %f %f\n", q1[0], q1[1], q1[2], q1[3]);
1845 printf("q2 = %f %f %f %f\n", q2[0], q2[1], q2[2], q2[3]);
1857 tf[3] = q1[3] * q2[3] - vdot(q1,q2);
1860 printf("tf = %f %f %f %f\n", tf[0], tf[1], tf[2], tf[3]);
1868 if (++count > RENORMCOUNT) {
1870 normalize_quat(dest);
1875 * Build a rotation matrix, given a quaternion rotation.
1879 build_rotmatrix(float m[4][4], float q[4])
1881 //#define TRANSPOSED_QUAT
1882 #ifndef TRANSPOSED_QUAT
1883 m[0][0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2]);
1884 m[0][1] = 2.0 * (q[0] * q[1] - q[2] * q[3]);
1885 m[0][2] = 2.0 * (q[2] * q[0] + q[1] * q[3]);
1888 m[1][0] = 2.0 * (q[0] * q[1] + q[2] * q[3]);
1889 m[1][1]= 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0]);
1890 m[1][2] = 2.0 * (q[1] * q[2] - q[0] * q[3]);
1893 m[2][0] = 2.0 * (q[2] * q[0] - q[1] * q[3]);
1894 m[2][1] = 2.0 * (q[1] * q[2] + q[0] * q[3]);
1895 m[2][2] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0]);
1902 #else // TRANSPOSED_QUAT
1903 m[0][0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2]);
1904 m[0][1] = 2.0 * (q[0] * q[1] + q[2] * q[3]);
1905 m[0][2] = 2.0 * (q[2] * q[0] - q[1] * q[3]);
1908 m[1][0] = 2.0 * (q[0] * q[1] - q[2] * q[3]);
1909 m[1][1] = 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0]);
1910 m[1][2] = 2.0 * (q[1] * q[2] + q[0] * q[3]);
1913 m[2][0] = 2.0 * (q[2] * q[0] + q[1] * q[3]);
1914 m[2][1] = 2.0 * (q[1] * q[2] - q[0] * q[3]);
1915 m[2][2] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0]);