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>
58 #include <simgear/timing/fg_time.hxx>
60 #include <Include/general.hxx>
61 #include <Aircraft/aircraft.hxx>
62 #include <Airports/simple.hxx>
63 #include <Autopilot/auto_gui.hxx>
64 #include <Autopilot/newauto.hxx>
65 #include <Cockpit/panel.hxx>
66 #include <Controls/controls.hxx>
67 #include <FDM/flight.hxx>
68 #include <Main/options.hxx>
69 #include <Main/fg_init.hxx>
70 #include <Main/views.hxx>
71 #include <Main/save.hxx>
72 #include <Main/bfi.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 )
675 if ( current_options.get_panel_status() ) {
676 // FGView *v = ¤t_view;
677 if( (toggle_pause = !current_options.get_pause()) )
678 current_options.toggle_pause();
681 current_options.toggle_pause();
685 // Toggle the Menu and Mouse display state
686 void guiToggleMenu(void)
689 // printf("Hiding Menu\n");
690 mainMenuBar->hide ();
691 #if defined(WIN32_CURSOR_TWEAKS)
692 if( mouse_mode == MOUSE_POINTER )
694 #endif // #ifdef WIN32_CURSOR_TWEAKS
696 // printf("Showing Menu\n");
697 mainMenuBar->reveal();
700 #endif // #ifdef WIN32
705 /* -----------------------------------------------------------------------
706 the Gui callback functions
707 ____________________________________________________________________*/
709 static void saveFlight(puObject *cv)
712 ofstream output("fgfs.sav");
713 if (output.good() && fgSaveFlight(output)) {
715 mkDialog("Saved flight to ./fgfs.sav");
716 FG_LOG(FG_INPUT, FG_INFO, "Saved flight to fgfs.sav");
718 mkDialog("Cannot save flight to ./fgfs.sav");
719 FG_LOG(FG_INPUT, FG_ALERT, "Cannot save flight to fgfs.sav");
724 static void loadFlight(puObject *cb)
727 ifstream input("fgfs.sav");
728 if (input.good() && fgLoadFlight(input)) {
730 mkDialog("Loaded flight from fgfs.sav");
731 FG_LOG(FG_INPUT, FG_INFO, "Restored flight from ./fgfs.sav");
733 mkDialog("Failed to load flight from fgfs.sav");
734 FG_LOG(FG_INPUT, FG_ALERT, "Cannot load flight from ./fgfs.sav");
739 void reInit(puObject *cb)
743 build_rotmatrix(quat_mat, curquat);
744 fgReInitSubsystems();
748 static void toggleClouds(puObject *cb)
750 FGBFI::setClouds( !FGBFI::getClouds() );
753 // This is the accessor function
754 void guiTogglePanel(puObject *cb)
756 current_options.toggle_panel();
759 //void MenuHideMenuCb(puObject *cb)
760 void hideMenuCb (puObject *cb)
765 void goodBye(puObject *)
767 // FG_LOG( FG_INPUT, FG_ALERT,
768 // "Program exiting normally at user request." );
769 cout << "Program exiting normally at user request." << endl;
771 #ifdef FG_NETWORK_OLK
772 if ( current_options.get_network_olk() ) {
773 if ( net_is_registered == 0 ) fgd_send_com( "8", FGFS_host);
784 void goAwayCb (puObject *me)
786 FG_POP_PUI_DIALOG( dialogBox );
789 void mkDialogInit (void)
791 // printf("mkDialogInit\n");
792 int x = (current_options.get_xsize()/2 - 400/2);
793 int y = (current_options.get_ysize()/2 - 100/2);
794 dialogBox = new puDialogBox (x, y); // 150, 50
796 dialogFrame = new puFrame (0,0,400,100);
797 dialogBoxMessage = new puText (10, 70);
798 dialogBoxMessage -> setLabel ("");
799 dialogBoxOkButton = new puOneShot (180, 10, 240, 50);
800 dialogBoxOkButton -> setLegend (gui_msg_OK);
801 dialogBoxOkButton -> makeReturnDefault (TRUE );
802 dialogBoxOkButton -> setCallback (goAwayCb);
804 FG_FINALIZE_PUI_DIALOG( dialogBox );
807 void MayBeGoodBye(puObject *)
812 void goAwayYesNoCb(puObject *me)
814 FG_POP_PUI_DIALOG( YNdialogBox);
817 void ConfirmExitDialogInit(void)
819 char msg[] = "Really Quit";
822 // printf("ConfirmExitDialogInit\n");
823 int len = 200 - puGetStringWidth( puGetDefaultLabelFont(), msg )/2;
825 int x = (current_options.get_xsize()/2 - 400/2);
826 int y = (current_options.get_ysize()/2 - 100/2);
828 YNdialogBox = new puDialogBox (x, y); // 150, 50
829 // YNdialogBox = new puDialogBox (150, 50);
831 YNdialogFrame = new puFrame (0,0,400, 100);
833 YNdialogBoxMessage = new puText (len, 70);
834 YNdialogBoxMessage -> setDefaultValue (msg);
835 YNdialogBoxMessage -> getDefaultValue (&s);
836 YNdialogBoxMessage -> setLabel (s);
838 YNdialogBoxOkButton = new puOneShot (100, 10, 160, 50);
839 YNdialogBoxOkButton -> setLegend (gui_msg_OK);
840 YNdialogBoxOkButton -> makeReturnDefault (TRUE );
841 YNdialogBoxOkButton -> setCallback (goodBye);
843 YNdialogBoxNoButton = new puOneShot (240, 10, 300, 50);
844 YNdialogBoxNoButton -> setLegend (gui_msg_NO);
845 YNdialogBoxNoButton -> setCallback (goAwayYesNoCb);
847 FG_FINALIZE_PUI_DIALOG( YNdialogBox );
850 void notCb (puObject *)
852 mkDialog ("This function isn't implemented yet");
855 void helpCb (puObject *)
859 #if defined(FX) && !defined(WIN32)
860 # if defined(XMESA_FX_FULLSCREEN) && defined(XMESA_FX_WINDOW)
861 if ( global_fullscreen ) {
862 global_fullscreen = false;
863 XMesaSetFXmode( XMESA_FX_WINDOW );
869 string url = "http://www.flightgear.org/Docs/InstallGuide/getstart.html";
871 if ( system("xwininfo -name Netscape > /dev/null 2>&1") == 0 ) {
872 command = "netscape -remote \"openURL(" + url + ")\" &";
874 command = "netscape " + url + " &";
877 command = "webrun.bat";
880 system( command.c_str() );
881 //string text = "Help started in netscape window.";
883 //mkDialog (text.c_str());
884 mkDialog ("Help started in netscape window.");
887 #if defined( WIN32 ) && !defined( __CYGWIN__)
889 static void rotateView( double roll, double pitch, double yaw )
894 static GlBitmap *b1 = NULL;
895 extern FGInterface cur_view_fdm;
896 GLubyte *hiResScreenCapture( int multiplier )
898 float oldfov = current_options.get_fov();
899 float fov = oldfov / multiplier;
900 FGView *v = ¤t_view;
901 current_options.set_fov(fov);
902 v->force_update_fov_math();
904 int cur_width = current_view.get_winWidth( );
905 int cur_height = current_view.get_winHeight( );
906 if (b1) delete( b1 );
907 // New empty (mostly) bitmap
908 b1 = new GlBitmap( GL_RGB, 1, 1, (unsigned char *)"123" );
910 for ( y = 0; y < multiplier; y++ )
912 for ( x = 0; x < multiplier; x++ )
914 fgReshape( cur_width, cur_height );
916 rotateView( 0, (y*fov)-((multiplier-1)*fov/2), (x*fov)-((multiplier-1)*fov/2) );
920 b1->copyBitmap( &b2, cur_width*x, cur_height*y );
923 current_view.UpdateViewParams(cur_view_fdm);
924 current_options.set_fov(oldfov);
925 v->force_update_fov_math();
926 return b1->getBitmap();
931 #if defined( WIN32 ) && !defined( __CYGWIN__)
932 // win32 print screen function
933 void printScreen ( puObject *obj ) {
934 bool show_pu_cursor = false;
936 if ( !puCursorIsHidden() ) {
937 show_pu_cursor = true;
943 CGlPrinter p( CGlPrinter::PRINT_BITMAP );
944 int cur_width = current_view.get_winWidth( );
945 int cur_height = current_view.get_winHeight( );
946 p.Begin( "FlightGear", cur_width*3, cur_height*3 );
947 p.End( hiResScreenCapture(3) );
950 mainMenuBar->reveal();
953 if ( show_pu_cursor ) {
958 #endif // #ifdef WIN32
961 void dumpSnapShot ( puObject *obj ) {
966 // do a screen snap shot
967 void fgDumpSnapShot () {
968 bool show_pu_cursor = false;
972 if ( !puCursorIsHidden() ) {
973 show_pu_cursor = true;
978 fgReshape( current_options.get_xsize(), current_options.get_ysize() );
980 // we need two render frames here to clear the menu and cursor
981 // ... not sure why but doing an extra fgFenderFrame() shoulnd't
986 my_glDumpWindow( "fgfs-screen.ppm",
987 current_options.get_xsize(),
988 current_options.get_ysize() );
990 mkDialog ("Snap shot saved to fgfs-screen.ppm");
992 if ( show_pu_cursor ) {
998 mainMenuBar->reveal();
1004 /// The beginnings of teleportation :-)
1005 // Needs cleaning up but works
1006 // These statics should disapear when this is a class
1007 static puDialogBox *AptDialog = 0;
1008 static puFrame *AptDialogFrame = 0;
1009 static puText *AptDialogMessage = 0;
1010 static puInput *AptDialogInput = 0;
1012 static char NewAirportId[16];
1013 static char NewAirportLabel[] = "Enter New Airport ID";
1015 static puOneShot *AptDialogOkButton = 0;
1016 static puOneShot *AptDialogCancelButton = 0;
1017 static puOneShot *AptDialogResetButton = 0;
1019 void AptDialog_Cancel(puObject *)
1021 FG_POP_PUI_DIALOG( AptDialog );
1024 void AptDialog_OK (puObject *)
1026 FGPath path( current_options.get_fg_root() );
1027 path.append( "Airports" );
1028 path.append( "simple.mk4" );
1029 FGAirports airports( path.c_str() );
1033 int PauseMode = current_options.get_pause();
1035 current_options.toggle_pause();
1038 AptDialogInput->getValue(&s);
1041 cout << "AptDialog_OK " << AptId << " " << AptId.length() << endl;
1043 AptDialog_Cancel( NULL );
1045 if ( AptId.length() ) {
1046 // set initial position from airport id
1047 FG_LOG( FG_GENERAL, FG_INFO,
1048 "Attempting to set starting position from airport code "
1051 if ( airports.search( AptId, &a ) )
1053 current_options.set_airport_id( AptId.c_str() );
1055 fgReInitSubsystems();
1058 AptId += " not in database.";
1059 mkDialog(AptId.c_str());
1062 if( PauseMode != current_options.get_pause() )
1063 current_options.toggle_pause();
1066 void AptDialog_Reset(puObject *)
1068 // strncpy( NewAirportId, current_options.get_airport_id().c_str(), 16 );
1069 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1070 AptDialogInput->setValue ( NewAirportId );
1071 AptDialogInput->setCursor( 0 ) ;
1074 void NewAirport(puObject *cb)
1076 // strncpy( NewAirportId, current_options.get_airport_id().c_str(), 16 );
1077 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1078 // cout << "NewAirport " << NewAirportId << endl;
1079 AptDialogInput->setValue( NewAirportId );
1081 FG_PUSH_PUI_DIALOG( AptDialog );
1084 static void NewAirportInit(void)
1086 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1087 int len = 150 - puGetStringWidth( puGetDefaultLabelFont(),
1088 NewAirportLabel ) / 2;
1090 AptDialog = new puDialogBox (150, 50);
1092 AptDialogFrame = new puFrame (0,0,350, 150);
1093 AptDialogMessage = new puText (len, 110);
1094 AptDialogMessage -> setLabel (NewAirportLabel);
1096 AptDialogInput = new puInput (50, 70, 300, 100);
1097 AptDialogInput -> setValue (NewAirportId);
1098 AptDialogInput -> acceptInput();
1100 AptDialogOkButton = new puOneShot (50, 10, 110, 50);
1101 AptDialogOkButton -> setLegend (gui_msg_OK);
1102 AptDialogOkButton -> setCallback (AptDialog_OK);
1103 AptDialogOkButton -> makeReturnDefault(TRUE);
1105 AptDialogCancelButton = new puOneShot (140, 10, 210, 50);
1106 AptDialogCancelButton -> setLegend (gui_msg_CANCEL);
1107 AptDialogCancelButton -> setCallback (AptDialog_Cancel);
1109 AptDialogResetButton = new puOneShot (240, 10, 300, 50);
1110 AptDialogResetButton -> setLegend (gui_msg_RESET);
1111 AptDialogResetButton -> setCallback (AptDialog_Reset);
1113 cout << "NewAirportInit " << NewAirportId << endl;
1114 FG_FINALIZE_PUI_DIALOG( AptDialog );
1117 #ifdef FG_NETWORK_OLK
1119 /// The beginnings of networking :-)
1120 // Needs cleaning up but works
1121 // These statics should disapear when this is a class
1122 static puDialogBox *NetIdDialog = 0;
1123 static puFrame *NetIdDialogFrame = 0;
1124 static puText *NetIdDialogMessage = 0;
1125 static puInput *NetIdDialogInput = 0;
1127 static char NewNetId[16];
1128 static char NewNetIdLabel[] = "Enter New Callsign";
1129 extern char *fgd_callsign;
1131 static puOneShot *NetIdDialogOkButton = 0;
1132 static puOneShot *NetIdDialogCancelButton = 0;
1134 void NetIdDialog_Cancel(puObject *)
1136 FG_POP_PUI_DIALOG( NetIdDialog );
1139 void NetIdDialog_OK (puObject *)
1143 int PauseMode = current_options.get_pause();
1145 current_options.toggle_pause();
1147 The following needs some cleanup because
1148 "string options.NetId" and "char *net_callsign"
1150 NetIdDialogInput->getValue(&net_callsign);
1151 NetId = net_callsign;
1153 NetIdDialog_Cancel( NULL );
1154 current_options.set_net_id( NetId.c_str() );
1155 strcpy( fgd_callsign, net_callsign);
1156 // strcpy( fgd_callsign, current_options.get_net_id().c_str());
1157 /* Entering a callsign indicates : user wants Net HUD Info */
1158 net_hud_display = 1;
1160 if( PauseMode != current_options.get_pause() )
1161 current_options.toggle_pause();
1164 void NewCallSign(puObject *cb)
1166 sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1167 // sprintf( NewNetId, "%s", fgd_callsign );
1168 NetIdDialogInput->setValue( NewNetId );
1170 FG_PUSH_PUI_DIALOG( NetIdDialog );
1173 static void NewNetIdInit(void)
1175 sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1176 // sprintf( NewNetId, "%s", fgd_callsign );
1177 int len = 150 - puGetStringWidth( puGetDefaultLabelFont(),
1178 NewNetIdLabel ) / 2;
1180 NetIdDialog = new puDialogBox (150, 50);
1182 NetIdDialogFrame = new puFrame (0,0,350, 150);
1183 NetIdDialogMessage = new puText (len, 110);
1184 NetIdDialogMessage -> setLabel (NewNetIdLabel);
1186 NetIdDialogInput = new puInput (50, 70, 300, 100);
1187 NetIdDialogInput -> setValue (NewNetId);
1188 NetIdDialogInput -> acceptInput();
1190 NetIdDialogOkButton = new puOneShot (50, 10, 110, 50);
1191 NetIdDialogOkButton -> setLegend (gui_msg_OK);
1192 NetIdDialogOkButton -> setCallback (NetIdDialog_OK);
1193 NetIdDialogOkButton -> makeReturnDefault(TRUE);
1195 NetIdDialogCancelButton = new puOneShot (240, 10, 300, 50);
1196 NetIdDialogCancelButton -> setLegend (gui_msg_CANCEL);
1197 NetIdDialogCancelButton -> setCallback (NetIdDialog_Cancel);
1200 FG_FINALIZE_PUI_DIALOG( NetIdDialog );
1203 static void net_display_toggle( puObject *cb)
1205 net_hud_display = (net_hud_display) ? 0 : 1;
1206 printf("Toggle net_hud_display : %d\n", net_hud_display);
1209 static void net_register( puObject *cb)
1211 fgd_send_com( "1", FGFS_host );
1212 net_is_registered = 0;
1213 printf("Registering to deamon\n");
1216 static void net_unregister( puObject *cb)
1218 fgd_send_com( "8", FGFS_host );
1219 net_is_registered = -1;
1220 printf("Unregistering from deamon\n");
1224 /*************** Deamon communication **********/
1226 // These statics should disapear when this is a class
1227 static puDialogBox *NetFGDDialog = 0;
1228 static puFrame *NetFGDDialogFrame = 0;
1229 static puText *NetFGDDialogMessage = 0;
1230 //static puInput *NetFGDDialogInput = 0;
1232 //static char NewNetId[16];
1233 static char NewNetFGDLabel[] = "Scan for deamon ";
1234 static char NewFGDHost[64] = "olk.mcp.de";
1235 static int NewFGDPortLo = 10000;
1236 static int NewFGDPortHi = 10001;
1238 //extern char *fgd_callsign;
1239 extern u_short base_port, end_port;
1240 extern int fgd_ip, verbose, current_port;
1241 extern char *fgd_host;
1244 static puOneShot *NetFGDDialogOkButton = 0;
1245 static puOneShot *NetFGDDialogCancelButton = 0;
1246 static puOneShot *NetFGDDialogScanButton = 0;
1248 static puInput *NetFGDHostDialogInput = 0;
1249 static puInput *NetFGDPortLoDialogInput = 0;
1250 static puInput *NetFGDPortHiDialogInput = 0;
1252 void NetFGDDialog_Cancel(puObject *)
1254 FG_POP_PUI_DIALOG( NetFGDDialog );
1257 void NetFGDDialog_OK (puObject *)
1261 int PauseMode = current_options.get_pause();
1262 if(!PauseMode) current_options.toggle_pause();
1263 NetFGDHostDialogInput->getValue( &NetFGD );
1264 strcpy( fgd_host, NetFGD);
1265 NetFGDPortLoDialogInput->getValue( (int *) &base_port );
1266 NetFGDPortHiDialogInput->getValue( (int *) &end_port );
1267 NetFGDDialog_Cancel( NULL );
1268 if( PauseMode != current_options.get_pause() )
1269 current_options.toggle_pause();
1272 void NetFGDDialog_SCAN (puObject *)
1277 int PauseMode = current_options.get_pause();
1278 if(!PauseMode) current_options.toggle_pause();
1279 // printf("Vor getvalue %s\n");
1280 NetFGDHostDialogInput->getValue( &NetFGD );
1281 // printf("Vor strcpy %s\n", (char *) NetFGD);
1282 strcpy( fgd_host, NetFGD);
1283 NetFGDPortLoDialogInput->getValue( (int *) &base_port );
1284 NetFGDPortHiDialogInput->getValue( (int *) &end_port );
1285 printf("FGD: %s Port-Start: %d Port-End: %d\n", fgd_host,
1286 base_port, end_port);
1287 net_resolv_fgd(fgd_host);
1288 printf("Resolve : %d\n", net_r);
1289 if( PauseMode != current_options.get_pause() ) {
1290 current_options.toggle_pause();
1294 strcpy( fgd_name, "");
1295 for( current_port = base_port; ( current_port <= end_port); current_port++) {
1296 fgd_send_com("0" , FGFS_host);
1297 sprintf( NewNetFGDLabel , "Scanning for deamon Port: %d", current_port);
1298 printf("FGD: searching %s\n", fgd_name);
1299 if ( strcmp( fgd_name, "") != 0 ) {
1300 sprintf( NewNetFGDLabel , "Found %s at Port: %d",
1301 fgd_name, current_port);
1302 fgd_port = current_port;
1303 current_port = end_port+1;
1306 current_port = end_port = base_port = fgd_port;
1308 NetFGDDialog_Cancel( NULL );
1312 void net_fgd_scan(puObject *cb)
1314 NewFGDPortLo = base_port;
1315 NewFGDPortHi = end_port;
1316 strcpy( NewFGDHost, fgd_host);
1317 NetFGDPortLoDialogInput->setValue( NewFGDPortLo );
1318 NetFGDPortHiDialogInput->setValue( NewFGDPortHi );
1319 NetFGDHostDialogInput->setValue( NewFGDHost );
1321 FG_PUSH_PUI_DIALOG( NetFGDDialog );
1325 static void NewNetFGDInit(void)
1327 // sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1328 // sprintf( NewNetId, "%s", fgd_callsign );
1329 int len = 170 - puGetStringWidth( puGetDefaultLabelFont(),
1330 NewNetFGDLabel ) / 2;
1332 NetFGDDialog = new puDialogBox (310, 30);
1334 NetFGDDialogFrame = new puFrame (0,0,320, 170);
1335 NetFGDDialogMessage = new puText (len, 140);
1336 NetFGDDialogMessage -> setLabel (NewNetFGDLabel);
1338 NetFGDPortLoDialogInput = new puInput (50, 70, 127, 100);
1339 NetFGDPortLoDialogInput -> setValue (NewFGDPortLo);
1340 NetFGDPortLoDialogInput -> acceptInput();
1342 NetFGDPortHiDialogInput = new puInput (199, 70, 275, 100);
1343 NetFGDPortHiDialogInput -> setValue (NewFGDPortHi);
1344 NetFGDPortHiDialogInput -> acceptInput();
1346 NetFGDHostDialogInput = new puInput (50, 100, 275, 130);
1347 NetFGDHostDialogInput -> setValue (NewFGDHost);
1348 NetFGDHostDialogInput -> acceptInput();
1350 NetFGDDialogScanButton = new puOneShot (130, 10, 200, 50);
1351 NetFGDDialogScanButton -> setLegend ("Scan");
1352 NetFGDDialogScanButton -> setCallback (NetFGDDialog_SCAN);
1353 NetFGDDialogScanButton -> makeReturnDefault(FALSE);
1355 NetFGDDialogOkButton = new puOneShot (50, 10, 120, 50);
1356 NetFGDDialogOkButton -> setLegend (gui_msg_OK);
1357 NetFGDDialogOkButton -> setCallback (NetFGDDialog_OK);
1358 NetFGDDialogOkButton -> makeReturnDefault(TRUE);
1360 NetFGDDialogCancelButton = new puOneShot (210, 10, 280, 50);
1361 NetFGDDialogCancelButton -> setLegend (gui_msg_CANCEL);
1362 NetFGDDialogCancelButton -> setCallback (NetFGDDialog_Cancel);
1365 FG_FINALIZE_PUI_DIALOG( NetFGDDialog );
1369 static void net_display_toggle( puObject *cb)
1371 net_hud_display = (net_hud_display) ? 0 : 1;
1372 printf("Toggle net_hud_display : %d\n", net_hud_display);
1379 /*************** End Networking **************/
1383 /* -----------------------------------------------------------------------
1385 ---------------------------------------------------------------------*/
1386 char *fileSubmenu [] = {
1387 "Exit", /* "Close", "---------", */
1388 #if defined( WIN32 ) && !defined( __CYGWIN__)
1398 puCallback fileSubmenuCb [] = {
1399 MayBeGoodBye, /* hideMenuCb, NULL, */
1400 #if defined( WIN32 ) && !defined( __CYGWIN__)
1413 char *editSubmenu [] = {
1416 puCallback editSubmenuCb [] = {
1421 extern void fgHUDalphaAdjust( puObject * );
1422 char *viewSubmenu [] = {
1424 /* "Cockpit View > ", "View >","------------", */
1425 "Toggle Panel...", NULL
1427 puCallback viewSubmenuCb [] = {
1429 /* notCb, notCb, NULL, */
1430 guiTogglePanel, NULL
1433 char *aircraftSubmenu [] = {
1434 "Autopilot", "Heading", "Altitude", "Navigation", "Airport",
1435 /* "Communication", */ NULL
1437 puCallback aircraftSubmenuCb [] = {
1438 fgAPAdjust, NewHeading, NewAltitude, fgLatLonFormatToggle, NewTgtAirport,
1442 char *environmentSubmenu [] = {
1444 "Goto Airport", /* "Terrain", "Weather", */ NULL
1446 puCallback environmentSubmenuCb [] = {
1448 NewAirport, /* notCb, notCb, */ NULL
1452 char *optionsSubmenu [] = {
1453 "Preferences", "Realism & Reliablity...", NULL
1455 puCallback optionsSubmenuCb [] = {
1460 #ifdef FG_NETWORK_OLK
1461 char *networkSubmenu [] = {
1462 "Unregister from FGD ", /* "Send MSG to All", "Send MSG", "Show Pilots", */
1464 "Scan for Deamons", "Enter Callsign", /* "Display Netinfos", */
1465 "Toggle Display", NULL
1467 puCallback networkSubmenuCb [] = {
1468 /* notCb, notCb, notCb, notCb, */
1471 net_fgd_scan, NewCallSign,
1472 net_display_toggle, NULL
1476 char *helpSubmenu [] = {
1477 /* "About...", */ "Help", NULL
1479 puCallback helpSubmenuCb [] = {
1480 /* notCb, */ helpCb, NULL
1484 /* -------------------------------------------------------------------------
1486 _____________________________________________________________________*/
1491 char *mesa_win_state;
1495 puSetDefaultStyle ( PUSTYLE_SMALL_BEVELLED ); //PUSTYLE_DEFAULT
1496 puSetDefaultColourScheme (0.8, 0.8, 0.8, 0.4);
1498 // Initialize our GLOBAL GUI STRINGS
1499 gui_msg_OK = msg_OK; // "OK"
1500 gui_msg_NO = msg_NO; // "NO"
1501 gui_msg_YES = msg_YES; // "YES"
1502 gui_msg_CANCEL = msg_CANCEL; // "CANCEL"
1503 gui_msg_RESET = msg_RESET; // "RESET"
1505 // Next check home directory
1507 char* envp = ::getenv( "FG_FONTS" );
1508 if ( envp != NULL ) {
1509 fntpath.set( envp );
1511 fntpath.set( current_options.get_fg_root() );
1512 fntpath.append( "Fonts" );
1515 // Install our fast fonts
1516 fntpath.append( "typewriter.txf" );
1517 guiFntHandle = new fntTexFont ;
1518 guiFntHandle -> load ( (char *)fntpath.c_str() ) ;
1519 puFont GuiFont ( guiFntHandle, 15 ) ;
1520 puSetDefaultFonts( GuiFont, GuiFont ) ;
1521 guiFnt = puGetDefaultLabelFont();
1523 if ( current_options.get_mouse_pointer() == 0 ) {
1524 // no preference specified for mouse pointer, attempt to autodetect...
1525 // Determine if we need to render the cursor, or if the windowing
1526 // system will do it. First test if we are rendering with glide.
1527 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1528 // Test for the MESA_GLX_FX env variable
1529 if ( (mesa_win_state = getenv( "MESA_GLX_FX" )) != NULL) {
1530 // test if we are fullscreen mesa/glide
1531 if ( (mesa_win_state[0] == 'f') ||
1532 (mesa_win_state[0] == 'F') ) {
1537 mouse_active = ~mouse_active;
1538 } else if ( current_options.get_mouse_pointer() == 1 ) {
1539 // don't show pointer
1540 } else if ( current_options.get_mouse_pointer() == 2 ) {
1541 // force showing pointer
1543 mouse_active = ~mouse_active;
1546 // MOUSE_VIEW mode stuff
1547 trackball(_quat0, 0.0, 0.0, 0.0, 0.0);
1549 build_rotmatrix(quat_mat, curquat);
1551 // Set up our Dialog Boxes
1552 ConfirmExitDialogInit();
1554 #ifdef FG_NETWORK_OLK
1560 // Make the menu bar
1561 mainMenuBar = new puMenuBar ();
1562 mainMenuBar -> add_submenu ("File", fileSubmenu, fileSubmenuCb);
1563 // mainMenuBar -> add_submenu ("Edit", editSubmenu, editSubmenuCb);
1564 mainMenuBar -> add_submenu ("View", viewSubmenu, viewSubmenuCb);
1565 mainMenuBar -> add_submenu ("Aircraft", aircraftSubmenu, aircraftSubmenuCb);
1566 mainMenuBar -> add_submenu ("Environment", environmentSubmenu, environmentSubmenuCb);
1567 // mainMenuBar -> add_submenu ("Options", optionsSubmenu, optionsSubmenuCb);
1568 #ifdef FG_NETWORK_OLK
1569 mainMenuBar -> add_submenu ("Network", networkSubmenu, networkSubmenuCb);
1571 mainMenuBar -> add_submenu ("Help", helpSubmenu, helpSubmenuCb);
1572 mainMenuBar-> close ();
1573 // Set up menu bar toggle
1582 * Implementation of a virtual trackball.
1583 * Implemented by Gavin Bell, lots of ideas from Thant Tessman and
1584 * the August '88 issue of Siggraph's "Computer Graphics," pp. 121-129.
1586 * Vector manip code:
1588 * Original code from:
1589 * David M. Ciemiewicz, Mark Grossman, Henry Moreton, and Paul Haeberli
1591 * Much mucking with by:
1594 #if defined(_WIN32) && !defined( __CYGWIN32__ )
1595 #pragma warning (disable:4244) /* disable bogus conversion warnings */
1599 //#include "trackball.h"
1602 * This size should really be based on the distance from the center of
1603 * rotation to the point on the object underneath the mouse. That
1604 * point would then track the mouse as closely as possible. This is a
1605 * simple example, though, so that is left as an Exercise for the
1608 #define TRACKBALLSIZE (0.8f)
1609 #define SQRT(x) sqrt(x)
1612 * Local function prototypes (not defined in trackball.h)
1614 static float tb_project_to_sphere(float, float, float);
1615 static void normalize_quat(float [4]);
1626 vset(float *v, float x, float y, float z)
1634 vsub(const float *src1, const float *src2, float *dst)
1636 dst[0] = src1[0] - src2[0];
1637 dst[1] = src1[1] - src2[1];
1638 dst[2] = src1[2] - src2[2];
1642 vcopy(const float *v1, float *v2)
1645 for (i = 0 ; i < 3 ; i++)
1650 vcross(const float *v1, const float *v2, float *cross)
1654 temp[0] = (v1[1] * v2[2]) - (v1[2] * v2[1]);
1655 temp[1] = (v1[2] * v2[0]) - (v1[0] * v2[2]);
1656 temp[2] = (v1[0] * v2[1]) - (v1[1] * v2[0]);
1661 vlength(const float *v)
1663 float tmp = v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
1668 vscale(float *v, float div)
1678 vscale(v,1.0/vlength(v));
1682 vdot(const float *v1, const float *v2)
1684 return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2];
1688 vadd(const float *src1, const float *src2, float *dst)
1690 dst[0] = src1[0] + src2[0];
1691 dst[1] = src1[1] + src2[1];
1692 dst[2] = src1[2] + src2[2];
1696 * Given an axis and angle, compute quaternion.
1699 axis_to_quat(float a[3], float phi, float q[4])
1701 double sinphi2, cosphi2;
1702 double phi2 = phi/2.0;
1703 sinphi2 = sin(phi2);
1704 cosphi2 = cos(phi2);
1712 * Project an x,y pair onto a sphere of radius r OR a hyperbolic sheet
1713 * if we are away from the center of the sphere.
1716 tb_project_to_sphere(float r, float x, float y)
1722 if (d < r * 0.70710678118654752440) { /* Inside sphere */
1725 } else { /* On hyperbola */
1726 t = r / 1.41421356237309504880;
1733 * Quaternions always obey: a^2 + b^2 + c^2 + d^2 = 1.0
1734 * If they don't add up to 1.0, dividing by their magnitued will
1737 * Note: See the following for more information on quaternions:
1739 * - Shoemake, K., Animating rotation with quaternion curves, Computer
1740 * Graphics 19, No 3 (Proc. SIGGRAPH'85), 245-254, 1985.
1741 * - Pletinckx, D., Quaternion calculus as a basic tool in computer
1742 * graphics, The Visual Computer 5, 2-13, 1989.
1745 normalize_quat(float q[4])
1750 tmp = q[0]*q[0] + q[1]*q[1] + q[2]*q[2] + q[3]*q[3];
1751 mag = 1.0 / SQRT(tmp);
1752 for (i = 0; i < 4; i++)
1757 * Ok, simulate a track-ball. Project the points onto the virtual
1758 * trackball, then figure out the axis of rotation, which is the cross
1759 * product of P1 P2 and O P1 (O is the center of the ball, 0,0,0)
1760 * Note: This is a deformed trackball-- is a trackball in the center,
1761 * but is deformed into a hyperbolic sheet of rotation away from the
1762 * center. This particular function was chosen after trying out
1763 * several variations.
1765 * It is assumed that the arguments to this routine are in the range
1769 trackball(float q[4], float p1x, float p1y, float p2x, float p2y)
1771 float a[3]; /* Axis of rotation */
1772 float phi; /* how much to rotate about axis */
1773 float p1[3], p2[3], d[3];
1776 if (p1x == p2x && p1y == p2y) {
1784 * First, figure out z-coordinates for projection of P1 and P2 to
1787 vset(p1,p1x,p1y,tb_project_to_sphere(TRACKBALLSIZE,p1x,p1y));
1788 vset(p2,p2x,p2y,tb_project_to_sphere(TRACKBALLSIZE,p2x,p2y));
1791 * Now, we want the cross product of P1 and P2
1796 * Figure out how much to rotate around that axis.
1799 t = vlength(d) / (2.0*TRACKBALLSIZE);
1802 * Avoid problems with out-of-control values...
1804 if (t > 1.0) t = 1.0;
1805 if (t < -1.0) t = -1.0;
1806 phi = 2.0 * asin(t);
1808 axis_to_quat(a,phi,q);
1812 * Given two rotations, e1 and e2, expressed as quaternion rotations,
1813 * figure out the equivalent single rotation and stuff it into dest.
1815 * This routine also normalizes the result every RENORMCOUNT times it is
1816 * called, to keep error from creeping in.
1818 * NOTE: This routine is written so that q1 or q2 may be the same
1819 * as dest (or each other).
1822 #define RENORMCOUNT 97
1825 add_quats(float q1[4], float q2[4], float dest[4])
1828 float t1[4], t2[4], t3[4];
1832 printf("q1 = %f %f %f %f\n", q1[0], q1[1], q1[2], q1[3]);
1833 printf("q2 = %f %f %f %f\n", q2[0], q2[1], q2[2], q2[3]);
1845 tf[3] = q1[3] * q2[3] - vdot(q1,q2);
1848 printf("tf = %f %f %f %f\n", tf[0], tf[1], tf[2], tf[3]);
1856 if (++count > RENORMCOUNT) {
1858 normalize_quat(dest);
1863 * Build a rotation matrix, given a quaternion rotation.
1867 build_rotmatrix(float m[4][4], float q[4])
1869 //#define TRANSPOSED_QUAT
1870 #ifndef TRANSPOSED_QUAT
1871 m[0][0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2]);
1872 m[0][1] = 2.0 * (q[0] * q[1] - q[2] * q[3]);
1873 m[0][2] = 2.0 * (q[2] * q[0] + q[1] * q[3]);
1876 m[1][0] = 2.0 * (q[0] * q[1] + q[2] * q[3]);
1877 m[1][1]= 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0]);
1878 m[1][2] = 2.0 * (q[1] * q[2] - q[0] * q[3]);
1881 m[2][0] = 2.0 * (q[2] * q[0] - q[1] * q[3]);
1882 m[2][1] = 2.0 * (q[1] * q[2] + q[0] * q[3]);
1883 m[2][2] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0]);
1890 #else // TRANSPOSED_QUAT
1891 m[0][0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2]);
1892 m[0][1] = 2.0 * (q[0] * q[1] + q[2] * q[3]);
1893 m[0][2] = 2.0 * (q[2] * q[0] - q[1] * q[3]);
1896 m[1][0] = 2.0 * (q[0] * q[1] - q[2] * q[3]);
1897 m[1][1] = 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0]);
1898 m[1][2] = 2.0 * (q[1] * q[2] + q[0] * q[3]);
1901 m[2][0] = 2.0 * (q[2] * q[0] + q[1] * q[3]);
1902 m[2][1] = 2.0 * (q[1] * q[2] - q[0] * q[3]);
1903 m[2][2] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0]);