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/fg_io.hxx>
70 #include <Main/globals.hxx>
71 #include <Main/options.hxx>
72 #include <Main/views.hxx>
73 #include <Main/save.hxx>
75 #include <NetworkOLK/network.h>
78 #if defined( WIN32 ) && !defined( __CYGWIN__ )
79 # include <simgear/screen/win32-printer.h>
80 # include <simgear/screen/GlBitmaps.h>
85 * A virtual trackball implementation
86 * Written by Gavin Bell for Silicon Graphics, November 1988.
89 * Pass the x and y coordinates of the last and current positions of
90 * the mouse, scaled so they are from (-1.0 ... 1.0).
92 * The resulting rotation is returned as a quaternion rotation in the
96 trackball(float q[4], float p1x, float p1y, float p2x, float p2y);
99 * Given two quaternions, add them together to get a third quaternion.
100 * Adding quaternions to get a compound rotation is analagous to adding
101 * translations to get a compound translation. When incrementally
102 * adding rotations, the first argument here should be the new
104 * rotation, the second and third the total rotation (which will be
105 * over-written with the resulting new total rotation).
108 add_quats(float *q1, float *q2, float *dest);
111 * A useful function, builds a rotation matrix in Matrix based on
115 build_rotmatrix(float m[4][4], float q[4]);
118 * This function computes a quaternion based on an axis (defined by
119 * the given vector) and an angle about which to rotate. The angle is
120 * expressed in radians. The result is put into the third argument.
123 axis_to_quat(float a[3], float phi, float q[4]);
128 FG_USING_STD(string);
130 #ifndef FG_HAVE_NATIVE_SGI_COMPILERS
134 #if defined(WIN32) || defined(__CYGWIN32__)
135 #define WIN32_CURSOR_TWEAKS
136 #elif (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
137 #define X_CURSOR_TWEAKS
140 // hack, should come from an include someplace
141 extern void fgInitVisuals( void );
142 extern void fgReshape( int width, int height );
143 extern void fgRenderFrame( void );
146 fntTexFont *guiFntHandle = 0;
148 static puMenuBar *mainMenuBar = 0;
149 //static puButton *hideMenuButton = 0;
151 static puDialogBox *dialogBox = 0;
152 static puFrame *dialogFrame = 0;
153 static puText *dialogBoxMessage = 0;
154 static puOneShot *dialogBoxOkButton = 0;
157 static puDialogBox *YNdialogBox = 0;
158 static puFrame *YNdialogFrame = 0;
159 static puText *YNdialogBoxMessage = 0;
160 static puOneShot *YNdialogBoxOkButton = 0;
161 static puOneShot *YNdialogBoxNoButton = 0;
163 static char msg_OK[] = "OK";
164 static char msg_NO[] = "NO";
165 static char msg_YES[] = "YES";
166 static char msg_CANCEL[] = "Cancel";
167 static char msg_RESET[] = "Reset";
169 char *gui_msg_OK; // "OK"
170 char *gui_msg_NO; // "NO"
171 char *gui_msg_YES; // "YES"
172 char *gui_msg_CANCEL; // "CANCEL"
173 char *gui_msg_RESET; // "RESET"
175 static char global_dialog_string[256];
177 // from autopilot.cxx
178 // extern void NewAltitude( puObject *cb );
179 // extern void NewHeading( puObject *cb );
180 // extern void fgAPAdjust( puObject * );
181 // extern void NewTgtAirport( puObject *cb );
182 // bool fgAPTerrainFollowEnabled( void );
183 // bool fgAPAltitudeEnabled( void );
184 // bool fgAPHeadingEnabled( void );
185 // bool fgAPWayPointEnabled( void );
186 // bool fgAPAutoThrottleEnabled( void );
189 extern void fgLatLonFormatToggle( puObject *);
191 /* --------------------------------------------------------------------
193 ---------------------------------------------------------------------*/
197 static int _savedX = 0;
198 static int _savedY = 0;
199 static int last_buttons = 0 ;
200 static int mouse_active = 0;
201 static int menu_on = 0;
202 static int mouse_joystick_control = 0;
204 //static time_t mouse_off_time;
205 //static int mouse_timed_out;
207 // to allow returning to previous view
208 // on second left click in MOUSE_VIEW mode
209 // This has file scope so that it can be reset
210 // if the little rodent is moved NHV
211 static int _mVtoggle;
213 // we break up the glutGetModifiers return mask
214 // once per loop and stash what we need in these
215 static int glut_active_shift;
216 static int glut_active_ctrl;
217 static int glut_active_alt;
219 static float lastquat[4];
220 static float curquat[4];
221 static float _quat0[4];
222 float quat_mat[4][4];
224 // uncomment this for view to exactly follow mouse in MOUSE_VIEW mode
225 // else smooth out the view panning to .01 radian per frame
226 // see view_offset smoothing mechanism in main.cxx
227 #define NO_SMOOTH_MOUSE_VIEW
229 // uncomment following to
230 #define RESET_VIEW_ON_LEAVING_MOUSE_VIEW
232 /* --------------------------------------------------------------------
233 Support for mouse as control yoke (david@megginson.com)
235 - right button toggles between pointer and yoke
236 - horizontal drag with no buttons moves ailerons
237 - vertical drag with no buttons moves elevators
238 - horizontal drag with left button moves brakes (left=on)
239 - vertical drag with left button moves throttle (up=more)
240 - horizontal drag with middle button moves rudder
241 - vertical drag with middle button moves trim
243 For the *_sensitivity variables, a lower number means more sensitive.
245 TODO: figure out how to keep pointer from leaving window in yoke mode.
246 TODO: add thresholds and null zones
247 TODO: sensitivity should be configurable at user option.
248 TODO: allow differential braking (this will be useful if FlightGear
249 ever supports tail-draggers like the DC-3)
250 ---------------------------------------------------------------------*/
258 MouseMode mouse_mode = MOUSE_POINTER;
260 static double aileron_sensitivity = 1.0/500.0;
261 static double elevator_sensitivity = 1.0/500.0;
262 static double brake_sensitivity = 1.0/250.0;
263 static double throttle_sensitivity = 1.0/250.0;
264 static double rudder_sensitivity = 1.0/500.0;
265 static double trim_sensitivity = 1.0/1000.0;
267 static inline void Quat0( void ) {
268 curquat[0] = _quat0[0];
269 curquat[1] = _quat0[1];
270 curquat[2] = _quat0[2];
271 curquat[3] = _quat0[3];
274 static inline int left_button( void ) {
275 return( last_buttons & (1 << GLUT_LEFT_BUTTON) );
278 static inline int middle_button( void ) {
279 return( last_buttons & (1 << GLUT_MIDDLE_BUTTON) );
282 static inline int right_button( void ) {
283 return( last_buttons & (1 << GLUT_RIGHT_BUTTON) );
286 static inline void TurnCursorOn( void )
289 #if defined(WIN32_CURSOR_TWEAKS)
290 switch (mouse_mode) {
292 glutSetCursor(GLUT_CURSOR_INHERIT);
295 glutSetCursor(GLUT_CURSOR_CROSSHAIR);
298 glutSetCursor(GLUT_CURSOR_LEFT_RIGHT);
302 #if defined(X_CURSOR_TWEAKS)
303 glutWarpPointer( current_view.get_winWidth()/2, current_view.get_winHeight()/2);
307 static inline void TurnCursorOff( void )
310 #if defined(WIN32_CURSOR_TWEAKS)
311 glutSetCursor(GLUT_CURSOR_NONE);
312 #elif defined(X_CURSOR_TWEAKS)
313 glutWarpPointer( current_view.get_winWidth(), current_view.get_winHeight());
317 void maybeToggleMouse( void )
319 #if defined(WIN32_CURSOR_TWEAKS)
320 static int first_time = ~0;
321 static int mouse_changed = 0;
325 mouse_changed = ~mouse_changed;
329 if( mouse_mode != MOUSE_POINTER )
331 if( mouse_changed ) {
332 mouse_changed = ~mouse_changed;
338 first_time = ~first_time;
339 #endif // #ifdef WIN32
342 // Call with FALSE to init and TRUE to restore
343 void BusyCursor( int restore )
345 static GLenum cursor = (GLenum) 0;
347 glutSetCursor(cursor);
349 cursor = (GLenum) glutGet( (GLenum) GLUT_WINDOW_CURSOR );
350 #if defined(WIN32_CURSOR_TWEAKS)
353 glutSetCursor( GLUT_CURSOR_WAIT );
357 int guiGetMouseButton(void)
362 void guiGetMouse(int *x, int *y)
368 void guiMotionFunc ( int x, int y )
370 int ww, wh, need_warp = 0;
374 if (mouse_mode == MOUSE_POINTER) {
376 glutPostRedisplay () ;
378 if( x == _mX && y == _mY)
381 // reset left click MOUSE_VIEW toggle feature
384 ww = current_view.get_winWidth();
385 wh = current_view.get_winHeight();
387 switch (mouse_mode) {
389 if( !mouse_joystick_control ) {
390 mouse_joystick_control = 1;
391 current_options.set_control_mode( fgOPTIONS::FG_MOUSE );
393 if ( left_button() ) {
394 offset = (_mX - x) * brake_sensitivity;
395 controls.move_brake(FGControls::ALL_WHEELS, offset);
396 offset = (_mY - y) * throttle_sensitivity;
397 controls.move_throttle(FGControls::ALL_ENGINES, offset);
398 } else if ( right_button() ) {
399 if( ! current_autopilot->get_HeadingEnabled() ) {
400 offset = (x - _mX) * rudder_sensitivity;
401 controls.move_rudder(offset);
403 if( ! current_autopilot->get_AltitudeEnabled() ) {
404 offset = (_mY - y) * trim_sensitivity;
405 controls.move_elevator_trim(offset);
408 if( ! current_autopilot->get_HeadingEnabled() ) {
409 offset = (x - _mX) * aileron_sensitivity;
410 controls.move_aileron(offset);
412 if( ! current_autopilot->get_AltitudeEnabled() ) {
413 offset = (_mY - y) * elevator_sensitivity;
414 controls.move_elevator(offset);
418 // Keep the mouse in the window.
419 if (x < 5 || x > ww-5 || y < 5 || y > wh-5) {
428 #define CONTRAINED_MOUSE_VIEW_Y
429 #ifdef CONTRAINED_MOUSE_VIEW_Y
433 #endif // CONTRAINED_MOUSE_VIEW_Y
435 } else if( y >= wh-1) {
436 #ifdef CONTRAINED_MOUSE_VIEW_Y
440 #endif // CONTRAINED_MOUSE_VIEW_Y
443 // wrap MOUSE_VIEW mode cursor x position
447 } else if ( x >= ww-1 ) {
451 // try to get FG_PI movement in each half of screen
455 if( middle_button() ) {
457 (2.0f * _mX - W) / W,
458 0, //(H - 2.0f * y) / H, // 3
460 0 //(H - 2.0f * _mY) / H // 1
467 0, //(2.0f * _mX - W) / W, // 0
468 (H - 2.0f * y) / H, // 3
469 0, //(2.0f * x - W) / W, // 2
470 (H - 2.0f * _mY) / H // 1
473 add_quats(lastquat, curquat, curquat);
474 build_rotmatrix(quat_mat, curquat);
477 // this could be done in above quat
478 // but requires redoing view pipeline
479 offset = current_view.get_goal_view_offset();
480 offset += ((_mX - x) * FG_2PI / W );
481 while (offset < 0.0) {
484 while (offset > FG_2PI) {
487 current_view.set_goal_view_offset(offset);
488 #ifdef NO_SMOOTH_MOUSE_VIEW
489 current_view.set_view_offset(offset);
498 glutWarpPointer(x, y);
500 // Record the new mouse position.
506 void guiMouseFunc(int button, int updown, int x, int y)
510 // private MOUSE_VIEW state variables
511 // to allow alternate left clicks in MOUSE_VIEW mode
512 // to toggle between current offsets and straight ahead
514 static int _mVx, _mVy, _Vx, _Vy;
515 static float _quat[4];
516 static double _view_offset;
518 // general purpose variables
521 glutModifiers = glutGetModifiers();
522 glut_active_shift = glutModifiers & GLUT_ACTIVE_SHIFT;
523 glut_active_ctrl = glutModifiers & GLUT_ACTIVE_CTRL;
524 glut_active_alt = glutModifiers & GLUT_ACTIVE_ALT;
526 // Was the left button pressed?
527 if (updown == GLUT_DOWN ) {
528 if( button == GLUT_LEFT_BUTTON)
530 switch (mouse_mode) {
537 // resume previous view offsets
542 curquat[0] = _quat[0];
543 curquat[1] = _quat[1];
544 curquat[2] = _quat[2];
545 curquat[3] = _quat[3];
546 current_view.set_goal_view_offset(_view_offset);
547 #ifdef NO_SMOOTH_MOUSE_VIEW
548 current_view.set_view_offset(_view_offset);
556 _quat[0] = curquat[0];
557 _quat[1] = curquat[1];
558 _quat[2] = curquat[2];
559 _quat[3] = curquat[3];
560 x = current_view.get_winWidth()/2;
561 y = current_view.get_winHeight()/2;
563 _view_offset = current_view.get_goal_view_offset();
564 current_view.set_goal_view_offset(0.0);
565 #ifdef NO_SMOOTH_MOUSE_VIEW
566 current_view.set_view_offset(0.0);
569 glutWarpPointer( x , y);
570 build_rotmatrix(quat_mat, curquat);
571 _mVtoggle = ~_mVtoggle;
574 }else if ( button == GLUT_RIGHT_BUTTON) {
575 switch (mouse_mode) {
577 mouse_mode = MOUSE_YOKE;
578 mouse_joystick_control = 0;
581 // start with zero point in center of screen
582 _mX = current_view.get_winWidth()/2;
583 _mY = current_view.get_winHeight()/2;
585 // try to have the MOUSE_YOKE position
586 // reflect the current stick position
587 offset = controls.get_aileron();
588 x = _mX - (int)(offset * aileron_sensitivity);
589 offset = controls.get_elevator();
590 y = _mY - (int)(offset * elevator_sensitivity);
592 glutSetCursor(GLUT_CURSOR_CROSSHAIR);
593 FG_LOG( FG_INPUT, FG_INFO, "Mouse in yoke mode" );
597 mouse_mode = MOUSE_VIEW;
598 current_options.set_control_mode( fgOPTIONS::FG_JOYSTICK );
599 x = current_view.get_winWidth()/2;
600 y = current_view.get_winHeight()/2;
603 build_rotmatrix(quat_mat, curquat);
604 glutSetCursor(GLUT_CURSOR_LEFT_RIGHT);
605 FG_LOG( FG_INPUT, FG_INFO, "Mouse in view mode" );
609 mouse_mode = MOUSE_POINTER;
612 #ifdef RESET_VIEW_ON_LEAVING_MOUSE_VIEW
614 build_rotmatrix(quat_mat, curquat);
615 current_view.set_goal_view_offset(0.0);
616 #ifdef NO_SMOOTH_MOUSE_VIEW
617 current_view.set_view_offset(0.0);
619 #endif // RESET_VIEW_ON_LEAVING_MOUSE_VIEW
620 glutSetCursor(GLUT_CURSOR_INHERIT);
625 FG_LOG( FG_INPUT, FG_INFO, "Mouse in pointer mode" );
628 glutWarpPointer( x, y );
629 } // END RIGHT BUTTON
630 } // END UPDOWN == GLUT_DOWN
632 // Note which button is pressed.
633 if ( updown == GLUT_DOWN ) {
634 last_buttons |= ( 1 << button ) ;
636 last_buttons &= ~( 1 << button ) ;
639 // If we're in pointer mode, let PUI
640 // know what's going on.
641 if (mouse_mode == MOUSE_POINTER) {
642 if (!puMouse (button, updown, x,y)) {
643 current_panel->doMouseAction(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 // Toggle the Menu and Mouse display state
672 void guiToggleMenu(void)
675 // printf("Hiding Menu\n");
676 mainMenuBar->hide ();
677 #if defined(WIN32_CURSOR_TWEAKS)
678 if( mouse_mode == MOUSE_POINTER )
680 #endif // #ifdef WIN32_CURSOR_TWEAKS
682 // printf("Showing Menu\n");
683 mainMenuBar->reveal();
686 #endif // #ifdef WIN32
691 /* -----------------------------------------------------------------------
692 the Gui callback functions
693 ____________________________________________________________________*/
695 static void saveFlight(puObject *cv)
698 ofstream output("fgfs.sav");
699 if (output.good() && fgSaveFlight(output)) {
701 mkDialog("Saved flight to ./fgfs.sav");
702 FG_LOG(FG_INPUT, FG_INFO, "Saved flight to fgfs.sav");
704 mkDialog("Cannot save flight to ./fgfs.sav");
705 FG_LOG(FG_INPUT, FG_ALERT, "Cannot save flight to fgfs.sav");
710 static void loadFlight(puObject *cb)
713 ifstream input("fgfs.sav");
714 if (input.good() && fgLoadFlight(input)) {
716 mkDialog("Loaded flight from fgfs.sav");
717 FG_LOG(FG_INPUT, FG_INFO, "Restored flight from ./fgfs.sav");
719 mkDialog("Failed to load flight from fgfs.sav");
720 FG_LOG(FG_INPUT, FG_ALERT, "Cannot load flight from ./fgfs.sav");
725 void reInit(puObject *cb)
729 build_rotmatrix(quat_mat, curquat);
730 fgReInitSubsystems();
734 static void toggleClouds(puObject *cb)
736 FGBFI::setClouds( !FGBFI::getClouds() );
739 // This is the accessor function
740 void guiTogglePanel(puObject *cb)
742 current_options.toggle_panel();
745 //void MenuHideMenuCb(puObject *cb)
746 void hideMenuCb (puObject *cb)
751 void goodBye(puObject *)
753 // FG_LOG( FG_INPUT, FG_ALERT,
754 // "Program exiting normally at user request." );
755 cout << "Program exiting normally at user request." << endl;
757 #ifdef FG_NETWORK_OLK
758 if ( current_options.get_network_olk() ) {
759 if ( net_is_registered == 0 ) fgd_send_com( "8", FGFS_host);
763 // close all external I/O connections
770 void goAwayCb (puObject *me)
772 FG_POP_PUI_DIALOG( dialogBox );
775 void mkDialogInit (void)
777 // printf("mkDialogInit\n");
778 int x = (current_options.get_xsize()/2 - 400/2);
779 int y = (current_options.get_ysize()/2 - 100/2);
780 dialogBox = new puDialogBox (x, y); // 150, 50
782 dialogFrame = new puFrame (0,0,400,100);
783 dialogBoxMessage = new puText (10, 70);
784 dialogBoxMessage -> setLabel ("");
785 dialogBoxOkButton = new puOneShot (180, 10, 240, 50);
786 dialogBoxOkButton -> setLegend (gui_msg_OK);
787 dialogBoxOkButton -> makeReturnDefault (TRUE );
788 dialogBoxOkButton -> setCallback (goAwayCb);
790 FG_FINALIZE_PUI_DIALOG( dialogBox );
793 void MayBeGoodBye(puObject *)
798 void goAwayYesNoCb(puObject *me)
800 FG_POP_PUI_DIALOG( YNdialogBox);
803 void ConfirmExitDialogInit(void)
805 char msg[] = "Really Quit";
808 // printf("ConfirmExitDialogInit\n");
809 int len = 200 - puGetStringWidth( puGetDefaultLabelFont(), msg )/2;
811 int x = (current_options.get_xsize()/2 - 400/2);
812 int y = (current_options.get_ysize()/2 - 100/2);
814 YNdialogBox = new puDialogBox (x, y); // 150, 50
815 // YNdialogBox = new puDialogBox (150, 50);
817 YNdialogFrame = new puFrame (0,0,400, 100);
819 YNdialogBoxMessage = new puText (len, 70);
820 YNdialogBoxMessage -> setDefaultValue (msg);
821 YNdialogBoxMessage -> getDefaultValue (&s);
822 YNdialogBoxMessage -> setLabel (s);
824 YNdialogBoxOkButton = new puOneShot (100, 10, 160, 50);
825 YNdialogBoxOkButton -> setLegend (gui_msg_OK);
826 YNdialogBoxOkButton -> makeReturnDefault (TRUE );
827 YNdialogBoxOkButton -> setCallback (goodBye);
829 YNdialogBoxNoButton = new puOneShot (240, 10, 300, 50);
830 YNdialogBoxNoButton -> setLegend (gui_msg_NO);
831 YNdialogBoxNoButton -> setCallback (goAwayYesNoCb);
833 FG_FINALIZE_PUI_DIALOG( YNdialogBox );
836 void notCb (puObject *)
838 mkDialog ("This function isn't implemented yet");
841 void helpCb (puObject *)
845 #if defined(FX) && !defined(WIN32)
846 # if defined(XMESA_FX_FULLSCREEN) && defined(XMESA_FX_WINDOW)
847 if ( global_fullscreen ) {
848 global_fullscreen = false;
849 XMesaSetFXmode( XMESA_FX_WINDOW );
855 string url = "http://www.flightgear.org/Docs/InstallGuide/getstart.html";
857 if ( system("xwininfo -name Netscape > /dev/null 2>&1") == 0 ) {
858 command = "netscape -remote \"openURL(" + url + ")\" &";
860 command = "netscape " + url + " &";
863 command = "webrun.bat";
866 system( command.c_str() );
867 //string text = "Help started in netscape window.";
869 //mkDialog (text.c_str());
870 mkDialog ("Help started in netscape window.");
873 #if defined( WIN32 ) && !defined( __CYGWIN__)
875 static void rotateView( double roll, double pitch, double yaw )
880 static GlBitmap *b1 = NULL;
881 extern FGInterface cur_view_fdm;
882 GLubyte *hiResScreenCapture( int multiplier )
884 float oldfov = current_options.get_fov();
885 float fov = oldfov / multiplier;
886 FGView *v = ¤t_view;
887 current_options.set_fov(fov);
888 v->force_update_fov_math();
890 int cur_width = current_view.get_winWidth( );
891 int cur_height = current_view.get_winHeight( );
892 if (b1) delete( b1 );
893 // New empty (mostly) bitmap
894 b1 = new GlBitmap( GL_RGB, 1, 1, (unsigned char *)"123" );
896 for ( y = 0; y < multiplier; y++ )
898 for ( x = 0; x < multiplier; x++ )
900 fgReshape( cur_width, cur_height );
902 rotateView( 0, (y*fov)-((multiplier-1)*fov/2), (x*fov)-((multiplier-1)*fov/2) );
906 b1->copyBitmap( &b2, cur_width*x, cur_height*y );
909 current_view.UpdateViewParams(cur_view_fdm);
910 current_options.set_fov(oldfov);
911 v->force_update_fov_math();
912 return b1->getBitmap();
917 #if defined( WIN32 ) && !defined( __CYGWIN__)
918 // win32 print screen function
919 void printScreen ( puObject *obj ) {
920 bool show_pu_cursor = false;
922 if ( !puCursorIsHidden() ) {
923 show_pu_cursor = true;
929 CGlPrinter p( CGlPrinter::PRINT_BITMAP );
930 int cur_width = current_view.get_winWidth( );
931 int cur_height = current_view.get_winHeight( );
932 p.Begin( "FlightGear", cur_width*3, cur_height*3 );
933 p.End( hiResScreenCapture(3) );
936 mainMenuBar->reveal();
939 if ( show_pu_cursor ) {
944 #endif // #ifdef WIN32
947 void dumpSnapShot ( puObject *obj ) {
952 // do a screen snap shot
953 void fgDumpSnapShot () {
954 bool show_pu_cursor = false;
956 int freeze = globals->get_freeze();
958 globals->set_freeze( true );
962 if ( !puCursorIsHidden() ) {
963 show_pu_cursor = true;
968 fgReshape( current_view.get_winWidth(), current_view.get_winHeight() );
970 // we need two render frames here to clear the menu and cursor
971 // ... not sure why but doing an extra fgFenderFrame() shoulnd't
976 my_glDumpWindow( "fgfs-screen.ppm",
977 current_options.get_xsize(),
978 current_options.get_ysize() );
980 mkDialog ("Snap shot saved to fgfs-screen.ppm");
982 if ( show_pu_cursor ) {
988 mainMenuBar->reveal();
992 globals->set_freeze( false );
996 /// The beginnings of teleportation :-)
997 // Needs cleaning up but works
998 // These statics should disapear when this is a class
999 static puDialogBox *AptDialog = 0;
1000 static puFrame *AptDialogFrame = 0;
1001 static puText *AptDialogMessage = 0;
1002 static puInput *AptDialogInput = 0;
1004 static char NewAirportId[16];
1005 static char NewAirportLabel[] = "Enter New Airport ID";
1007 static puOneShot *AptDialogOkButton = 0;
1008 static puOneShot *AptDialogCancelButton = 0;
1009 static puOneShot *AptDialogResetButton = 0;
1011 void AptDialog_Cancel(puObject *)
1013 FG_POP_PUI_DIALOG( AptDialog );
1016 void AptDialog_OK (puObject *)
1018 FGPath path( current_options.get_fg_root() );
1019 path.append( "Airports" );
1020 path.append( "simple.mk4" );
1021 FGAirports airports( path.c_str() );
1025 int freeze = globals->get_freeze();
1027 globals->set_freeze( true );
1030 AptDialogInput->getValue(&s);
1033 cout << "AptDialog_OK " << AptId << " " << AptId.length() << endl;
1035 AptDialog_Cancel( NULL );
1037 if ( AptId.length() ) {
1038 // set initial position from airport id
1039 FG_LOG( FG_GENERAL, FG_INFO,
1040 "Attempting to set starting position from airport code "
1043 if ( airports.search( AptId, &a ) )
1045 current_options.set_airport_id( AptId.c_str() );
1046 current_options.set_altitude( -9999.0 );
1047 // fgSetPosFromAirportID( AptId );
1048 fgSetPosFromAirportIDandHdg( AptId,
1049 cur_fdm_state->get_Psi() * RAD_TO_DEG);
1051 fgReInitSubsystems();
1054 AptId += " not in database.";
1055 mkDialog(AptId.c_str());
1059 globals->set_freeze( false );
1062 void AptDialog_Reset(puObject *)
1064 // strncpy( NewAirportId, current_options.get_airport_id().c_str(), 16 );
1065 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1066 AptDialogInput->setValue ( NewAirportId );
1067 AptDialogInput->setCursor( 0 ) ;
1070 void NewAirport(puObject *cb)
1072 // strncpy( NewAirportId, current_options.get_airport_id().c_str(), 16 );
1073 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1074 // cout << "NewAirport " << NewAirportId << endl;
1075 AptDialogInput->setValue( NewAirportId );
1077 FG_PUSH_PUI_DIALOG( AptDialog );
1080 static void NewAirportInit(void)
1082 sprintf( NewAirportId, "%s", current_options.get_airport_id().c_str() );
1083 int len = 150 - puGetStringWidth( puGetDefaultLabelFont(),
1084 NewAirportLabel ) / 2;
1086 AptDialog = new puDialogBox (150, 50);
1088 AptDialogFrame = new puFrame (0,0,350, 150);
1089 AptDialogMessage = new puText (len, 110);
1090 AptDialogMessage -> setLabel (NewAirportLabel);
1092 AptDialogInput = new puInput (50, 70, 300, 100);
1093 AptDialogInput -> setValue (NewAirportId);
1094 AptDialogInput -> acceptInput();
1096 AptDialogOkButton = new puOneShot (50, 10, 110, 50);
1097 AptDialogOkButton -> setLegend (gui_msg_OK);
1098 AptDialogOkButton -> setCallback (AptDialog_OK);
1099 AptDialogOkButton -> makeReturnDefault(TRUE);
1101 AptDialogCancelButton = new puOneShot (140, 10, 210, 50);
1102 AptDialogCancelButton -> setLegend (gui_msg_CANCEL);
1103 AptDialogCancelButton -> setCallback (AptDialog_Cancel);
1105 AptDialogResetButton = new puOneShot (240, 10, 300, 50);
1106 AptDialogResetButton -> setLegend (gui_msg_RESET);
1107 AptDialogResetButton -> setCallback (AptDialog_Reset);
1109 cout << "NewAirportInit " << NewAirportId << endl;
1110 FG_FINALIZE_PUI_DIALOG( AptDialog );
1113 #ifdef FG_NETWORK_OLK
1115 /// The beginnings of networking :-)
1116 // Needs cleaning up but works
1117 // These statics should disapear when this is a class
1118 static puDialogBox *NetIdDialog = 0;
1119 static puFrame *NetIdDialogFrame = 0;
1120 static puText *NetIdDialogMessage = 0;
1121 static puInput *NetIdDialogInput = 0;
1123 static char NewNetId[16];
1124 static char NewNetIdLabel[] = "Enter New Callsign";
1125 extern char *fgd_callsign;
1127 static puOneShot *NetIdDialogOkButton = 0;
1128 static puOneShot *NetIdDialogCancelButton = 0;
1130 void NetIdDialog_Cancel(puObject *)
1132 FG_POP_PUI_DIALOG( NetIdDialog );
1135 void NetIdDialog_OK (puObject *)
1139 bool freeze = globals->get_freeze();
1141 globals->set_freeze( true );
1143 The following needs some cleanup because
1144 "string options.NetId" and "char *net_callsign"
1146 NetIdDialogInput->getValue(&net_callsign);
1147 NetId = net_callsign;
1149 NetIdDialog_Cancel( NULL );
1150 current_options.set_net_id( NetId.c_str() );
1151 strcpy( fgd_callsign, net_callsign);
1152 // strcpy( fgd_callsign, current_options.get_net_id().c_str());
1153 /* Entering a callsign indicates : user wants Net HUD Info */
1154 net_hud_display = 1;
1157 globals->set_freeze( false );
1160 void NewCallSign(puObject *cb)
1162 sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1163 // sprintf( NewNetId, "%s", fgd_callsign );
1164 NetIdDialogInput->setValue( NewNetId );
1166 FG_PUSH_PUI_DIALOG( NetIdDialog );
1169 static void NewNetIdInit(void)
1171 sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1172 // sprintf( NewNetId, "%s", fgd_callsign );
1173 int len = 150 - puGetStringWidth( puGetDefaultLabelFont(),
1174 NewNetIdLabel ) / 2;
1176 NetIdDialog = new puDialogBox (150, 50);
1178 NetIdDialogFrame = new puFrame (0,0,350, 150);
1179 NetIdDialogMessage = new puText (len, 110);
1180 NetIdDialogMessage -> setLabel (NewNetIdLabel);
1182 NetIdDialogInput = new puInput (50, 70, 300, 100);
1183 NetIdDialogInput -> setValue (NewNetId);
1184 NetIdDialogInput -> acceptInput();
1186 NetIdDialogOkButton = new puOneShot (50, 10, 110, 50);
1187 NetIdDialogOkButton -> setLegend (gui_msg_OK);
1188 NetIdDialogOkButton -> setCallback (NetIdDialog_OK);
1189 NetIdDialogOkButton -> makeReturnDefault(TRUE);
1191 NetIdDialogCancelButton = new puOneShot (240, 10, 300, 50);
1192 NetIdDialogCancelButton -> setLegend (gui_msg_CANCEL);
1193 NetIdDialogCancelButton -> setCallback (NetIdDialog_Cancel);
1196 FG_FINALIZE_PUI_DIALOG( NetIdDialog );
1199 static void net_display_toggle( puObject *cb)
1201 net_hud_display = (net_hud_display) ? 0 : 1;
1202 printf("Toggle net_hud_display : %d\n", net_hud_display);
1205 static void net_register( puObject *cb)
1207 fgd_send_com( "1", FGFS_host );
1208 net_is_registered = 0;
1209 printf("Registering to deamon\n");
1212 static void net_unregister( puObject *cb)
1214 fgd_send_com( "8", FGFS_host );
1215 net_is_registered = -1;
1216 printf("Unregistering from deamon\n");
1220 /*************** Deamon communication **********/
1222 // These statics should disapear when this is a class
1223 static puDialogBox *NetFGDDialog = 0;
1224 static puFrame *NetFGDDialogFrame = 0;
1225 static puText *NetFGDDialogMessage = 0;
1226 //static puInput *NetFGDDialogInput = 0;
1228 //static char NewNetId[16];
1229 static char NewNetFGDLabel[] = "Scan for deamon ";
1230 static char NewFGDHost[64] = "olk.mcp.de";
1231 static int NewFGDPortLo = 10000;
1232 static int NewFGDPortHi = 10001;
1234 //extern char *fgd_callsign;
1235 extern u_short base_port, end_port;
1236 extern int fgd_ip, verbose, current_port;
1237 extern char *fgd_host;
1240 static puOneShot *NetFGDDialogOkButton = 0;
1241 static puOneShot *NetFGDDialogCancelButton = 0;
1242 static puOneShot *NetFGDDialogScanButton = 0;
1244 static puInput *NetFGDHostDialogInput = 0;
1245 static puInput *NetFGDPortLoDialogInput = 0;
1246 static puInput *NetFGDPortHiDialogInput = 0;
1248 void NetFGDDialog_Cancel(puObject *)
1250 FG_POP_PUI_DIALOG( NetFGDDialog );
1253 void NetFGDDialog_OK (puObject *)
1257 bool freeze = globals->get_freeze();
1259 globals->set_freeze( true );
1260 NetFGDHostDialogInput->getValue( &NetFGD );
1261 strcpy( fgd_host, NetFGD);
1262 NetFGDPortLoDialogInput->getValue( (int *) &base_port );
1263 NetFGDPortHiDialogInput->getValue( (int *) &end_port );
1264 NetFGDDialog_Cancel( NULL );
1266 globals->set_freeze( false );
1269 void NetFGDDialog_SCAN (puObject *)
1274 bool freeze = globals->get_freeze();
1276 globals->set_freeze( true );
1277 // printf("Vor getvalue %s\n");
1278 NetFGDHostDialogInput->getValue( &NetFGD );
1279 // printf("Vor strcpy %s\n", (char *) NetFGD);
1280 strcpy( fgd_host, NetFGD);
1281 NetFGDPortLoDialogInput->getValue( (int *) &base_port );
1282 NetFGDPortHiDialogInput->getValue( (int *) &end_port );
1283 printf("FGD: %s Port-Start: %d Port-End: %d\n", fgd_host,
1284 base_port, end_port);
1285 net_resolv_fgd(fgd_host);
1286 printf("Resolve : %d\n", net_r);
1288 globals->set_freeze( false );
1291 strcpy( fgd_name, "");
1292 for( current_port = base_port; ( current_port <= end_port); current_port++) {
1293 fgd_send_com("0" , FGFS_host);
1294 sprintf( NewNetFGDLabel , "Scanning for deamon Port: %d", current_port);
1295 printf("FGD: searching %s\n", fgd_name);
1296 if ( strcmp( fgd_name, "") != 0 ) {
1297 sprintf( NewNetFGDLabel , "Found %s at Port: %d",
1298 fgd_name, current_port);
1299 fgd_port = current_port;
1300 current_port = end_port+1;
1303 current_port = end_port = base_port = fgd_port;
1305 NetFGDDialog_Cancel( NULL );
1309 void net_fgd_scan(puObject *cb)
1311 NewFGDPortLo = base_port;
1312 NewFGDPortHi = end_port;
1313 strcpy( NewFGDHost, fgd_host);
1314 NetFGDPortLoDialogInput->setValue( NewFGDPortLo );
1315 NetFGDPortHiDialogInput->setValue( NewFGDPortHi );
1316 NetFGDHostDialogInput->setValue( NewFGDHost );
1318 FG_PUSH_PUI_DIALOG( NetFGDDialog );
1322 static void NewNetFGDInit(void)
1324 // sprintf( NewNetId, "%s", current_options.get_net_id().c_str() );
1325 // sprintf( NewNetId, "%s", fgd_callsign );
1326 int len = 170 - puGetStringWidth( puGetDefaultLabelFont(),
1327 NewNetFGDLabel ) / 2;
1329 NetFGDDialog = new puDialogBox (310, 30);
1331 NetFGDDialogFrame = new puFrame (0,0,320, 170);
1332 NetFGDDialogMessage = new puText (len, 140);
1333 NetFGDDialogMessage -> setLabel (NewNetFGDLabel);
1335 NetFGDPortLoDialogInput = new puInput (50, 70, 127, 100);
1336 NetFGDPortLoDialogInput -> setValue (NewFGDPortLo);
1337 NetFGDPortLoDialogInput -> acceptInput();
1339 NetFGDPortHiDialogInput = new puInput (199, 70, 275, 100);
1340 NetFGDPortHiDialogInput -> setValue (NewFGDPortHi);
1341 NetFGDPortHiDialogInput -> acceptInput();
1343 NetFGDHostDialogInput = new puInput (50, 100, 275, 130);
1344 NetFGDHostDialogInput -> setValue (NewFGDHost);
1345 NetFGDHostDialogInput -> acceptInput();
1347 NetFGDDialogScanButton = new puOneShot (130, 10, 200, 50);
1348 NetFGDDialogScanButton -> setLegend ("Scan");
1349 NetFGDDialogScanButton -> setCallback (NetFGDDialog_SCAN);
1350 NetFGDDialogScanButton -> makeReturnDefault(FALSE);
1352 NetFGDDialogOkButton = new puOneShot (50, 10, 120, 50);
1353 NetFGDDialogOkButton -> setLegend (gui_msg_OK);
1354 NetFGDDialogOkButton -> setCallback (NetFGDDialog_OK);
1355 NetFGDDialogOkButton -> makeReturnDefault(TRUE);
1357 NetFGDDialogCancelButton = new puOneShot (210, 10, 280, 50);
1358 NetFGDDialogCancelButton -> setLegend (gui_msg_CANCEL);
1359 NetFGDDialogCancelButton -> setCallback (NetFGDDialog_Cancel);
1362 FG_FINALIZE_PUI_DIALOG( NetFGDDialog );
1366 static void net_display_toggle( puObject *cb)
1368 net_hud_display = (net_hud_display) ? 0 : 1;
1369 printf("Toggle net_hud_display : %d\n", net_hud_display);
1376 /*************** End Networking **************/
1380 /* -----------------------------------------------------------------------
1382 ---------------------------------------------------------------------*/
1383 char *fileSubmenu [] = {
1384 "Exit", /* "Close", "---------", */
1385 #if defined( WIN32 ) && !defined( __CYGWIN__)
1395 puCallback fileSubmenuCb [] = {
1396 MayBeGoodBye, /* hideMenuCb, NULL, */
1397 #if defined( WIN32 ) && !defined( __CYGWIN__)
1410 char *editSubmenu [] = {
1413 puCallback editSubmenuCb [] = {
1418 extern void fgHUDalphaAdjust( puObject * );
1419 char *viewSubmenu [] = {
1421 /* "Cockpit View > ", "View >","------------", */
1422 "Toggle Panel...", NULL
1424 puCallback viewSubmenuCb [] = {
1426 /* notCb, notCb, NULL, */
1427 guiTogglePanel, NULL
1432 char *autopilotSubmenu [] = {
1433 "Toggle HUD Format", "Adjust AP Settings",
1435 "Clear Route", "Skip Current Waypoint", "Add Waypoint",
1437 "Set Altitude", "Set Heading",
1441 puCallback autopilotSubmenuCb [] = {
1442 fgLatLonFormatToggle, fgAPAdjust,
1444 ClearRoute, PopWayPoint, AddWayPoint,
1446 NewAltitude, NewHeading,
1450 char *environmentSubmenu [] = {
1452 "Goto Airport", /* "Terrain", "Weather", */ NULL
1454 puCallback environmentSubmenuCb [] = {
1456 NewAirport, /* notCb, notCb, */ NULL
1460 char *optionsSubmenu [] = {
1461 "Preferences", "Realism & Reliablity...", NULL
1463 puCallback optionsSubmenuCb [] = {
1468 #ifdef FG_NETWORK_OLK
1469 char *networkSubmenu [] = {
1470 "Unregister from FGD ", /* "Send MSG to All", "Send MSG", "Show Pilots", */
1472 "Scan for Deamons", "Enter Callsign", /* "Display Netinfos", */
1473 "Toggle Display", NULL
1475 puCallback networkSubmenuCb [] = {
1476 /* notCb, notCb, notCb, notCb, */
1479 net_fgd_scan, NewCallSign,
1480 net_display_toggle, NULL
1484 char *helpSubmenu [] = {
1485 /* "About...", */ "Help", NULL
1487 puCallback helpSubmenuCb [] = {
1488 /* notCb, */ helpCb, NULL
1492 /* -------------------------------------------------------------------------
1494 _____________________________________________________________________*/
1499 char *mesa_win_state;
1503 puSetDefaultStyle ( PUSTYLE_SMALL_BEVELLED ); //PUSTYLE_DEFAULT
1504 puSetDefaultColourScheme (0.8, 0.8, 0.8, 0.4);
1506 // Initialize our GLOBAL GUI STRINGS
1507 gui_msg_OK = msg_OK; // "OK"
1508 gui_msg_NO = msg_NO; // "NO"
1509 gui_msg_YES = msg_YES; // "YES"
1510 gui_msg_CANCEL = msg_CANCEL; // "CANCEL"
1511 gui_msg_RESET = msg_RESET; // "RESET"
1513 // Next check home directory
1515 char* envp = ::getenv( "FG_FONTS" );
1516 if ( envp != NULL ) {
1517 fntpath.set( envp );
1519 fntpath.set( current_options.get_fg_root() );
1520 fntpath.append( "Fonts" );
1523 // Install our fast fonts
1524 fntpath.append( "typewriter.txf" );
1525 guiFntHandle = new fntTexFont ;
1526 guiFntHandle -> load ( (char *)fntpath.c_str() ) ;
1527 puFont GuiFont ( guiFntHandle, 15 ) ;
1528 puSetDefaultFonts( GuiFont, GuiFont ) ;
1529 guiFnt = puGetDefaultLabelFont();
1531 if ( current_options.get_mouse_pointer() == 0 ) {
1532 // no preference specified for mouse pointer, attempt to autodetect...
1533 // Determine if we need to render the cursor, or if the windowing
1534 // system will do it. First test if we are rendering with glide.
1535 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1536 // Test for the MESA_GLX_FX env variable
1537 if ( (mesa_win_state = getenv( "MESA_GLX_FX" )) != NULL) {
1538 // test if we are fullscreen mesa/glide
1539 if ( (mesa_win_state[0] == 'f') ||
1540 (mesa_win_state[0] == 'F') ) {
1545 mouse_active = ~mouse_active;
1546 } else if ( current_options.get_mouse_pointer() == 1 ) {
1547 // don't show pointer
1548 } else if ( current_options.get_mouse_pointer() == 2 ) {
1549 // force showing pointer
1551 mouse_active = ~mouse_active;
1554 // MOUSE_VIEW mode stuff
1555 trackball(_quat0, 0.0, 0.0, 0.0, 0.0);
1557 build_rotmatrix(quat_mat, curquat);
1559 // Set up our Dialog Boxes
1560 ConfirmExitDialogInit();
1562 #ifdef FG_NETWORK_OLK
1568 // Make the menu bar
1569 mainMenuBar = new puMenuBar ();
1570 mainMenuBar -> add_submenu ("File", fileSubmenu, fileSubmenuCb);
1571 // mainMenuBar -> add_submenu ("Edit", editSubmenu, editSubmenuCb);
1572 mainMenuBar -> add_submenu ("View", viewSubmenu, viewSubmenuCb);
1573 mainMenuBar -> add_submenu ("Environment", environmentSubmenu, environmentSubmenuCb);
1574 mainMenuBar -> add_submenu ("Autopilot", autopilotSubmenu, autopilotSubmenuCb);
1575 // mainMenuBar -> add_submenu ("Options", optionsSubmenu, optionsSubmenuCb);
1576 #ifdef FG_NETWORK_OLK
1577 if ( current_options.get_network_olk() ) {
1578 mainMenuBar -> add_submenu ("Network", networkSubmenu, networkSubmenuCb);
1581 mainMenuBar -> add_submenu ("Help", helpSubmenu, helpSubmenuCb);
1582 mainMenuBar-> close ();
1583 // Set up menu bar toggle
1592 * Implementation of a virtual trackball.
1593 * Implemented by Gavin Bell, lots of ideas from Thant Tessman and
1594 * the August '88 issue of Siggraph's "Computer Graphics," pp. 121-129.
1596 * Vector manip code:
1598 * Original code from:
1599 * David M. Ciemiewicz, Mark Grossman, Henry Moreton, and Paul Haeberli
1601 * Much mucking with by:
1604 #if defined(_WIN32) && !defined( __CYGWIN32__ )
1605 #pragma warning (disable:4244) /* disable bogus conversion warnings */
1609 //#include "trackball.h"
1612 * This size should really be based on the distance from the center of
1613 * rotation to the point on the object underneath the mouse. That
1614 * point would then track the mouse as closely as possible. This is a
1615 * simple example, though, so that is left as an Exercise for the
1618 #define TRACKBALLSIZE (0.8f)
1619 #define SQRT(x) sqrt(x)
1622 * Local function prototypes (not defined in trackball.h)
1624 static float tb_project_to_sphere(float, float, float);
1625 static void normalize_quat(float [4]);
1636 vset(float *v, float x, float y, float z)
1644 vsub(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 vcopy(const float *v1, float *v2)
1655 for (i = 0 ; i < 3 ; i++)
1660 vcross(const float *v1, const float *v2, float *cross)
1664 temp[0] = (v1[1] * v2[2]) - (v1[2] * v2[1]);
1665 temp[1] = (v1[2] * v2[0]) - (v1[0] * v2[2]);
1666 temp[2] = (v1[0] * v2[1]) - (v1[1] * v2[0]);
1671 vlength(const float *v)
1673 float tmp = v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
1678 vscale(float *v, float div)
1688 vscale(v,1.0/vlength(v));
1692 vdot(const float *v1, const float *v2)
1694 return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2];
1698 vadd(const float *src1, const float *src2, float *dst)
1700 dst[0] = src1[0] + src2[0];
1701 dst[1] = src1[1] + src2[1];
1702 dst[2] = src1[2] + src2[2];
1706 * Given an axis and angle, compute quaternion.
1709 axis_to_quat(float a[3], float phi, float q[4])
1711 double sinphi2, cosphi2;
1712 double phi2 = phi/2.0;
1713 sinphi2 = sin(phi2);
1714 cosphi2 = cos(phi2);
1722 * Project an x,y pair onto a sphere of radius r OR a hyperbolic sheet
1723 * if we are away from the center of the sphere.
1726 tb_project_to_sphere(float r, float x, float y)
1732 if (d < r * 0.70710678118654752440) { /* Inside sphere */
1735 } else { /* On hyperbola */
1736 t = r / 1.41421356237309504880;
1743 * Quaternions always obey: a^2 + b^2 + c^2 + d^2 = 1.0
1744 * If they don't add up to 1.0, dividing by their magnitued will
1747 * Note: See the following for more information on quaternions:
1749 * - Shoemake, K., Animating rotation with quaternion curves, Computer
1750 * Graphics 19, No 3 (Proc. SIGGRAPH'85), 245-254, 1985.
1751 * - Pletinckx, D., Quaternion calculus as a basic tool in computer
1752 * graphics, The Visual Computer 5, 2-13, 1989.
1755 normalize_quat(float q[4])
1760 tmp = q[0]*q[0] + q[1]*q[1] + q[2]*q[2] + q[3]*q[3];
1761 mag = 1.0 / SQRT(tmp);
1762 for (i = 0; i < 4; i++)
1767 * Ok, simulate a track-ball. Project the points onto the virtual
1768 * trackball, then figure out the axis of rotation, which is the cross
1769 * product of P1 P2 and O P1 (O is the center of the ball, 0,0,0)
1770 * Note: This is a deformed trackball-- is a trackball in the center,
1771 * but is deformed into a hyperbolic sheet of rotation away from the
1772 * center. This particular function was chosen after trying out
1773 * several variations.
1775 * It is assumed that the arguments to this routine are in the range
1779 trackball(float q[4], float p1x, float p1y, float p2x, float p2y)
1781 float a[3]; /* Axis of rotation */
1782 float phi; /* how much to rotate about axis */
1783 float p1[3], p2[3], d[3];
1786 if (p1x == p2x && p1y == p2y) {
1794 * First, figure out z-coordinates for projection of P1 and P2 to
1797 vset(p1,p1x,p1y,tb_project_to_sphere(TRACKBALLSIZE,p1x,p1y));
1798 vset(p2,p2x,p2y,tb_project_to_sphere(TRACKBALLSIZE,p2x,p2y));
1801 * Now, we want the cross product of P1 and P2
1806 * Figure out how much to rotate around that axis.
1809 t = vlength(d) / (2.0*TRACKBALLSIZE);
1812 * Avoid problems with out-of-control values...
1814 if (t > 1.0) t = 1.0;
1815 if (t < -1.0) t = -1.0;
1816 phi = 2.0 * asin(t);
1818 axis_to_quat(a,phi,q);
1822 * Given two rotations, e1 and e2, expressed as quaternion rotations,
1823 * figure out the equivalent single rotation and stuff it into dest.
1825 * This routine also normalizes the result every RENORMCOUNT times it is
1826 * called, to keep error from creeping in.
1828 * NOTE: This routine is written so that q1 or q2 may be the same
1829 * as dest (or each other).
1832 #define RENORMCOUNT 97
1835 add_quats(float q1[4], float q2[4], float dest[4])
1838 float t1[4], t2[4], t3[4];
1842 printf("q1 = %f %f %f %f\n", q1[0], q1[1], q1[2], q1[3]);
1843 printf("q2 = %f %f %f %f\n", q2[0], q2[1], q2[2], q2[3]);
1855 tf[3] = q1[3] * q2[3] - vdot(q1,q2);
1858 printf("tf = %f %f %f %f\n", tf[0], tf[1], tf[2], tf[3]);
1866 if (++count > RENORMCOUNT) {
1868 normalize_quat(dest);
1873 * Build a rotation matrix, given a quaternion rotation.
1877 build_rotmatrix(float m[4][4], float q[4])
1879 //#define TRANSPOSED_QUAT
1880 #ifndef TRANSPOSED_QUAT
1881 m[0][0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2]);
1882 m[0][1] = 2.0 * (q[0] * q[1] - q[2] * q[3]);
1883 m[0][2] = 2.0 * (q[2] * q[0] + q[1] * q[3]);
1886 m[1][0] = 2.0 * (q[0] * q[1] + q[2] * q[3]);
1887 m[1][1]= 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0]);
1888 m[1][2] = 2.0 * (q[1] * q[2] - q[0] * q[3]);
1891 m[2][0] = 2.0 * (q[2] * q[0] - q[1] * q[3]);
1892 m[2][1] = 2.0 * (q[1] * q[2] + q[0] * q[3]);
1893 m[2][2] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0]);
1900 #else // TRANSPOSED_QUAT
1901 m[0][0] = 1.0 - 2.0 * (q[1] * q[1] + q[2] * q[2]);
1902 m[0][1] = 2.0 * (q[0] * q[1] + q[2] * q[3]);
1903 m[0][2] = 2.0 * (q[2] * q[0] - q[1] * q[3]);
1906 m[1][0] = 2.0 * (q[0] * q[1] - q[2] * q[3]);
1907 m[1][1] = 1.0 - 2.0 * (q[2] * q[2] + q[0] * q[0]);
1908 m[1][2] = 2.0 * (q[1] * q[2] + q[0] * q[3]);
1911 m[2][0] = 2.0 * (q[2] * q[0] + q[1] * q[3]);
1912 m[2][1] = 2.0 * (q[1] * q[2] - q[0] * q[3]);
1913 m[2][2] = 1.0 - 2.0 * (q[1] * q[1] + q[0] * q[0]);