1 /* -*- Mode: C; tab-width: 4 -*-
2 Ported from xlockmore 4.03a12 to be a standalone program and thus usable
3 with xscreensaver by Jamie Zawinski <jwz@jwz.org> on 15-May-97.
5 Original copyright notice from xlock.c:
7 * Copyright (c) 1988-91 by Patrick J. Naughton.
9 * Permission to use, copy, modify, and distribute this software and its
10 * documentation for any purpose and without fee is hereby granted,
11 * provided that the above copyright notice appear in all copies and that
12 * both that copyright notice and this permission notice appear in
13 * supporting documentation.
15 * This file is provided AS IS with no warranties of any kind. The author
16 * shall have no liability with respect to the infringement of copyrights,
17 * trade secrets or any patents by this file or any part thereof. In no
18 * event will the author be liable for any lost revenue or profits or
19 * other special, indirect and consequential damages.
23 static const char sccsid[] = "@(#)bouboule.c 4.00 97/01/01 xlockmore";
27 * bouboule.c (bouboule mode for xlockmore)
29 * Sort of starfield for xlockmore. I found that making a starfield for
30 * a 3D engine and thought it could be a nice lock mode. For a real starfield,
31 * I only scale the sort of sphere you see to the whole sky and clip the stars
32 * to the camera screen.
34 * Code Copyright 1996 by Jeremie PETIT (jeremie_petit@geocities.com)
36 * Use: batchcount is the number of stars.
37 * cycles is the maximum size for a star
39 * 15-May-97: jwz@jwz.org: turned into a standalone program.
40 * 04-Sep-96: Added 3d support (Henrik Theiling, theiling@coli-uni-sb.de)
41 * 20-Feb-96: Added tests so that already malloced objects are not
42 * malloced twice, thanks to the report from <mccomb@interport.net>
43 * 01-Feb-96: Patched by Jouk Jansen <joukj@alpha.chem.uva.nl> for VMS
44 * Patched by <bagleyd@bigfoot.com> for TrueColor displays
45 * 30-Jan-96: Wrote all that I wanted to.
47 * DONE: Build up a XArc list and Draw everything once with XFillArcs
48 * That idea came from looking at swarm code.
49 * DONE: Add an old arcs list for erasing.
50 * DONE: Make center of starfield SinVariable.
51 * DONE: Add some random in the sinvary() function.
52 * DONE: check time for erasing the stars with the two methods and use the
53 * better one. Note that sometimes the time difference between
54 * beginning of erasing and its end is negative! I check this, and
55 * do not use this result when it occurs. If all values are negative,
56 * the erasing will continue being done in the currently tested mode.
57 * DONE: Allow stars size customization.
58 * DONE: Make sizey be no less than half sizex or no bigger than twice sizex.
60 * IDEA: A simple check can be performed to know which stars are "behind"
61 * and which are "in front". So is possible to very simply change
62 * the drawing mode for these two sorts of stars. BUT: this would lead
63 * to a rewrite of the XArc list code because drawing should be done
64 * in two steps: "behind" stars then "in front" stars. Also, what could
65 * be the difference between the rendering of these two types of stars?
66 * IDEA: Calculate the distance of each star to the "viewer" and render the
67 * star accordingly to this distance. Same remarks as for previous
68 * ideas can be pointed out. This would even lead to reget the old stars
69 * drawing code, that has been replaced by the XFillArcs. On another
70 * hand, this would allow particular stars (own color, shape...), as
71 * far as they would be individually drawn. One should be careful to
72 * draw them according to their distance, that is not drawing a far
73 * star after a close one.
77 # define DEFAULTS "*count: 100 \n" \
85 "*both3d: magenta \n" \
88 # define SMOOTH_COLORS
89 # define reshape_bouboule 0
90 # define bouboule_handle_event 0
91 # include "xlockmore.h" /* from the xscreensaver distribution */
92 #else /* !STANDALONE */
93 # include "xlock.h" /* from the xlockmore distribution */
94 # define ENTRYPOINT /**/
95 #endif /* !STANDALONE */
97 ENTRYPOINT ModeSpecOpt bouboule_opts = {
98 0, NULL, 0, NULL, NULL };
100 #define USEOLDXARCS 1 /* If 1, we use old xarcs list for erasing.
101 * else we just roughly erase the window.
102 * This mainly depends on the number of stars,
103 * because when they are many, it is faster to
104 * erase the whole window than to erase each star
107 #if HAVE_GETTIMEOFDAY
108 #define ADAPT_ERASE 1 /* If 1, then we try ADAPT_CHECKS black XFillArcs,
109 * and after, ADAPT_CHECKS XFillRectangle.
110 * We check which method seems better, knowing that
111 * XFillArcs is generally visually better. So we
112 * consider that XFillArcs is still better if its time
113 * is about XFillRectangle * ADAPT_ARC_PREFERED
114 * We need gettimeofday
115 * for this... Does it exist on other systems ? Do we
116 * have to use another function for others ?
117 * This value overrides USEOLDXARCS.
122 # include "../xvmsutils/unix_time.h"
124 # include <X11/unix_time.h>
128 #include <sys/time.h>
130 #define ADAPT_CHECKS 50
131 #define ADAPT_ARC_PREFERED 150 /* Maybe the value that is the most important
132 * for adapting to a system */
135 #define dtor(x) (((x) * M_PI) / 180.0) /* Degrees to radians */
139 /* jwz: I think slower color changes look better */
140 #define COLOR_CHANGES 50 /* How often we change colors (1 = always)
141 * This value should be tuned accordingly to
142 * the number of stars */
143 #define MAX_SIZEX_SIZEY 2. /* This controls whether the sphere can be very
144 * very large and have a small height (or the
145 * opposite) or no. */
147 #define THETACANRAND 80 /* percentage of changes for the speed of
148 * change of the 3 theta values */
149 #define SIZECANRAND 80 /* percentage of changes for the speed of
150 * change of the sizex and sizey values */
151 #define POSCANRAND 80 /* percentage of changes for the speed of
152 * change of the x and y values */
153 /* Note that these XXXCANRAND values can be 0, that is no rand acceleration *
156 #define VARRANDALPHA (NRAND((int) (M_PI * 1000.0))/1000.0)
157 #define VARRANDSTEP (M_PI/(NRAND(100)+100.0))
158 #define VARRANDMIN (-70.0)
159 #define VARRANDMAX 70.0
161 #define MINZVAL 100 /* stars can come this close */
162 #define SCREENZ 2000 /* this is where the screen is */
163 #define MAXZVAL 10000 /* stars can go this far away */
165 #define GETZDIFF(z) ((MI_DELTA3D(mi))*20.0*(1.0-(SCREENZ)/(z+1000)))
166 #define MAXDIFF MAX(-GETZDIFF(MINZVAL),GETZDIFF(MAXZVAL))
168 /* These values are the variation parameters of the acceleration variation *
169 of the SinVariables that are randomized. */
171 /******************************/
172 typedef struct SinVariableStruct
173 /******************************/
176 * Alpha is the current state of the sinvariable
177 * alpha should be initialized to a value between
181 * Speed of evolution of alpha. It should be a reasonable
182 * fraction of 2 * M_PI. This value directly influence
183 * the variable speed of variation.
185 double minimum; /* Minimum value for the variable */
186 double maximum; /* Maximum value for the variable */
187 double value; /* Current value */
188 int mayrand; /* Flag for knowing whether some randomization can be
189 * applied to the variable */
190 struct SinVariableStruct *varrand; /* Evolving Variable: the variation of
194 /***********************/
195 typedef struct StarStruct
196 /***********************/
198 double x, y, z; /* Position of the star */
199 short size; /* Try to guess */
202 /****************************/
203 typedef struct StarFieldStruct
204 /****************************/
206 short width, height; /* width and height of the starfield window */
207 short max_star_size; /* Maximum radius for stars. stars radius will
208 * vary from 1 to MAX_STAR_SIZE */
209 SinVariable x; /* Evolving variables: */
210 SinVariable y; /* Center of the field on the screen */
212 SinVariable sizex; /* Evolving variable: half width of the field */
213 SinVariable sizey; /* Evolving variable: half height of the field */
214 SinVariable thetax; /* Evolving Variables: */
215 SinVariable thetay; /* rotation angles of the starfield */
216 SinVariable thetaz; /* around x, y and z local axis */
217 Star *star; /* List of stars */
218 XArc *xarc; /* Current List of arcs */
219 XArc *xarcleft; /* additional list for the left arcs */
220 #if ((USEOLDXARCS == 1) || (ADAPT_ERASE == 1))
221 XArc *oldxarc; /* Old list of arcs */
224 unsigned long color; /* Current color of the starfield */
225 int colorp; /* Pointer to color of the starfield */
226 int NbStars; /* Number of stars */
227 short colorchange; /* Counter for the color change */
228 #if (ADAPT_ERASE == 1)
229 short hasbeenchecked;
235 static StarField *starfield = NULL;
239 sinvary(SinVariable * v)
243 v->value = v->minimum +
244 (v->maximum - v->minimum) * (sin(v->alpha) + 1.0) / 2.0;
249 int vaval = NRAND(100);
251 if (vaval <= v->mayrand)
253 v->alpha += (100.0 + (v->varrand->value)) * v->step / 100.0;
256 if (v->alpha > 2 * M_PI)
257 v->alpha -= 2 * M_PI;
260 /*************************************************/
262 sininit(SinVariable * v,
263 double alpha, double step, double minimum, double maximum,
268 v->minimum = minimum;
269 v->maximum = maximum;
270 v->mayrand = mayrand;
272 if (v->varrand == NULL)
273 v->varrand = (SinVariable *) calloc(1, sizeof (SinVariable));
282 /* We calculate the values at least once for initialization */
287 sinfree(SinVariable * point)
289 SinVariable *temp, *next;
291 next = point->varrand;
294 next = temp->varrand;
295 (void) free((void *) temp);
302 init_bouboule(ModeInfo * mi)
306 * The stars init part was first inspirated from the net3d game starfield
307 * code. But net3d starfield is not really 3d starfield, and I needed real 3d,
308 * so only remains the net3d starfield initialization main idea, that is
309 * the stars distribution on a sphere (theta and omega computing)
313 int size = MI_SIZE(mi);
317 if (starfield == NULL) {
318 if ((starfield = (StarField *) calloc(MI_NUM_SCREENS(mi),
319 sizeof (StarField))) == NULL)
322 sp = &starfield[MI_SCREEN(mi)];
324 sp->width = MI_WIN_WIDTH(mi);
325 sp->height = MI_WIN_HEIGHT(mi);
327 /* use the right `black' pixel values: */
328 if (MI_WIN_IS_INSTALL(mi) && MI_WIN_IS_USE3D(mi)) {
329 XSetForeground(MI_DISPLAY(mi), MI_GC(mi), MI_NONE_COLOR(mi));
330 XFillRectangle(MI_DISPLAY(mi), MI_WINDOW(mi), MI_GC(mi),
331 0, 0, sp->width, sp->height);
333 XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
336 sp->max_star_size = NRAND(-size - MINSIZE + 1) + MINSIZE;
337 else if (size < MINSIZE)
338 sp->max_star_size = MINSIZE;
340 sp->max_star_size = size;
342 sp->NbStars = MI_BATCHCOUNT(mi);
343 if (sp->NbStars < -MINSTARS) {
345 (void) free((void *) sp->star);
349 (void) free((void *) sp->xarc);
353 (void) free((void *) sp->xarcleft);
356 #if ((USEOLDXARCS == 1) || (ADAPT_ERASE == 1))
358 (void) free((void *) sp->oldxarc);
361 if (sp->oldxarcleft) {
362 (void) free((void *) sp->oldxarcleft);
363 sp->oldxarcleft = NULL;
366 sp->NbStars = NRAND(-sp->NbStars - MINSTARS + 1) + MINSTARS;
367 } else if (sp->NbStars < MINSTARS)
368 sp->NbStars = MINSTARS;
370 /* We get memory for lists of objects */
371 if (sp->star == NULL)
372 sp->star = (Star *) malloc(sp->NbStars * sizeof (Star));
373 if (sp->xarc == NULL)
374 sp->xarc = (XArc *) malloc(sp->NbStars * sizeof (XArc));
375 if (MI_WIN_IS_USE3D(mi) && sp->xarcleft == NULL)
376 sp->xarcleft = (XArc *) malloc(sp->NbStars * sizeof (XArc));
377 #if ((USEOLDXARCS == 1) || (ADAPT_ERASE == 1))
378 if (sp->oldxarc == NULL)
379 sp->oldxarc = (XArc *) malloc(sp->NbStars * sizeof (XArc));
380 if (MI_WIN_IS_USE3D(mi) && sp->oldxarcleft == NULL)
381 sp->oldxarcleft = (XArc *) malloc(sp->NbStars * sizeof (XArc));
385 /* We initialize evolving variables */
387 NRAND(3142) / 1000.0, M_PI / (NRAND(100) + 100.0),
388 ((double) sp->width) / 4.0,
389 3.0 * ((double) sp->width) / 4.0,
392 NRAND(3142) / 1000.0, M_PI / (NRAND(100) + 100.0),
393 ((double) sp->height) / 4.0,
394 3.0 * ((double) sp->height) / 4.0,
397 /* for z, we have to ensure that the bouboule does not get behind */
398 /* the eyes of the viewer. His/Her eyes are at 0. Because the */
399 /* bouboule uses the x-radius for the z-radius, too, we have to */
400 /* use the x-values. */
402 NRAND(3142) / 1000.0, M_PI / (NRAND(100) + 100.0),
403 ((double) sp->width / 2.0 + MINZVAL),
404 ((double) sp->width / 2.0 + MAXZVAL),
409 NRAND(3142) / 1000.0, M_PI / (NRAND(100) + 100.0),
410 MIN(((double) sp->width) - sp->x.value,
412 MIN(((double) sp->width) - sp->x.value,
417 NRAND(3142) / 1000.0, M_PI / (NRAND(100) + 100.0),
418 MAX(sp->sizex.value / MAX_SIZEX_SIZEY,
419 sp->sizey.maximum / 5.0),
420 MIN(sp->sizex.value * MAX_SIZEX_SIZEY,
421 MIN(((double) sp->height) -
427 NRAND(3142) / 1000.0, M_PI / (NRAND(200) + 200.0),
431 NRAND(3142) / 1000.0, M_PI / (NRAND(200) + 200.0),
435 NRAND(3142) / 1000.0, M_PI / (NRAND(400) + 400.0),
439 for (i = 0; i < sp->NbStars; i++) {
441 XArc *arc = NULL, *arcleft = NULL;
442 #if ((USEOLDXARCS == 1) || (ADAPT_ERASE == 1))
443 XArc *oarc = NULL, *oarcleft = NULL;
446 star = &(sp->star[i]);
447 arc = &(sp->xarc[i]);
448 if (MI_WIN_IS_USE3D(mi))
449 arcleft = &(sp->xarcleft[i]);
450 #if ((USEOLDXARCS == 1) || (ADAPT_ERASE == 1))
451 oarc = &(sp->oldxarc[i]);
452 if (MI_WIN_IS_USE3D(mi))
453 oarcleft = &(sp->oldxarcleft[i]);
455 /* Elevation and bearing of the star */
456 theta = dtor((NRAND(1800)) / 10.0 - 90.0);
457 omega = dtor((NRAND(3600)) / 10.0 - 180.0);
459 /* Stars coordinates in a 3D space */
460 star->x = cos(theta) * sin(omega);
461 star->y = sin(omega) * sin(theta);
462 star->z = cos(omega);
464 /* We set the stars size */
465 star->size = NRAND(2 * sp->max_star_size);
466 if (star->size < sp->max_star_size)
469 star->size -= sp->max_star_size;
471 /* We set default values for the XArc lists elements */
473 if (MI_WIN_IS_USE3D(mi)) {
474 arcleft->x = arcleft->y = 0;
476 #if ((USEOLDXARCS == 1) || (ADAPT_ERASE == 1))
477 oarc->x = oarc->y = 0;
478 if (MI_WIN_IS_USE3D(mi)) {
479 oarcleft->x = oarcleft->y = 0;
482 arc->width = 2 + star->size;
483 arc->height = 2 + star->size;
484 if (MI_WIN_IS_USE3D(mi)) {
485 arcleft->width = 2 + star->size;
486 arcleft->height = 2 + star->size;
488 #if ((USEOLDXARCS == 1) || (ADAPT_ERASE == 1))
489 oarc->width = 2 + star->size;
490 oarc->height = 2 + star->size;
491 if (MI_WIN_IS_USE3D(mi)) {
492 oarcleft->width = 2 + star->size;
493 oarcleft->height = 2 + star->size;
498 arc->angle2 = 360 * 64;
499 if (MI_WIN_IS_USE3D(mi)) {
501 arcleft->angle2 = 360 * 64;
503 #if ((USEOLDXARCS == 1) || (ADAPT_ERASE == 1))
505 oarc->angle2 = 360 * 64; /* ie. we draw whole disks:
506 * from 0 to 360 degrees */
507 if (MI_WIN_IS_USE3D(mi)) {
508 oarcleft->angle1 = 0;
509 oarcleft->angle2 = 360 * 64;
514 if (MI_NPIXELS(mi) > 2)
515 sp->colorp = NRAND(MI_NPIXELS(mi));
516 /* We set up the starfield color */
517 if (!MI_WIN_IS_USE3D(mi) && MI_NPIXELS(mi) > 2)
518 sp->color = MI_PIXEL(mi, sp->colorp);
520 sp->color = MI_WIN_WHITE_PIXEL(mi);
522 #if (ADAPT_ERASE == 1)
523 /* We initialize the adaptation code for screen erasing */
524 sp->hasbeenchecked = ADAPT_CHECKS * 2;
532 draw_bouboule(ModeInfo * mi)
536 Display *display = MI_DISPLAY(mi);
537 Window window = MI_WINDOW(mi);
539 StarField *sp = &starfield[MI_SCREEN(mi)];
541 double CX, CY, CZ, SX, SY, SZ;
543 XArc *arc = NULL, *arcleft = NULL;
545 #ifdef HAVE_COCOA /* Don't second-guess Quartz's double-buffering */
546 XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
549 #if (ADAPT_ERASE == 1)
555 #if ((USEOLDXARCS == 0) || (ADAPT_ERASE == 1))
556 short x_1, y_1, x_2, y_2;
558 /* bounding rectangle around the old starfield,
559 * for erasing with the smallest rectangle
560 * instead of filling the whole screen */
561 int maxdiff = 0; /* maximal distance between left and right */
563 /* star in 3d mode, otherwise 0 */
566 #if ((USEOLDXARCS == 0) || (ADAPT_ERASE == 1))
567 if (MI_WIN_IS_USE3D(mi)) {
568 maxdiff = (int) MAXDIFF;
570 x_1 = (int) sp->x.value - (int) sp->sizex.value -
571 sp->max_star_size - maxdiff;
572 y_1 = (int) sp->y.value - (int) sp->sizey.value -
574 x_2 = 2 * ((int) sp->sizex.value + sp->max_star_size + maxdiff);
575 y_2 = 2 * ((int) sp->sizey.value + sp->max_star_size);
577 /* We make variables vary. */
578 sinvary(&sp->thetax);
579 sinvary(&sp->thetay);
580 sinvary(&sp->thetaz);
584 if (MI_WIN_IS_USE3D(mi))
587 /* A little trick to prevent the bouboule from being
588 * bigger than the screen */
590 MIN(((double) sp->width) - sp->x.value,
592 sp->sizex.minimum = sp->sizex.maximum / 3.0;
594 /* Another trick to make the ball not too flat */
596 MAX(sp->sizex.value / MAX_SIZEX_SIZEY,
597 sp->sizey.maximum / 3.0);
599 MIN(sp->sizex.value * MAX_SIZEX_SIZEY,
600 MIN(((double) sp->height) - sp->y.value,
607 * We calculate the rotation matrix values. We just make the
608 * rotation on the fly, without using a matrix.
609 * Star positions are recorded as unit vectors pointing in various
610 * directions. We just make them all rotate.
612 CX = cos(sp->thetax.value);
613 SX = sin(sp->thetax.value);
614 CY = cos(sp->thetay.value);
615 SY = sin(sp->thetay.value);
616 CZ = cos(sp->thetaz.value);
617 SZ = sin(sp->thetaz.value);
619 for (i = 0; i < sp->NbStars; i++) {
620 star = &(sp->star[i]);
621 arc = &(sp->xarc[i]);
622 if (MI_WIN_IS_USE3D(mi)) {
623 arcleft = &(sp->xarcleft[i]);
624 /* to help the eyes, the starfield is always as wide as */
625 /* deep, so .sizex.value can be used. */
626 diff = (int) GETZDIFF(sp->sizex.value *
627 ((SY * CX) * star->x + (SX) * star->y +
628 (CX * CY) * star->z) + sp->z.value);
630 arc->x = (short) ((sp->sizex.value *
631 ((CY * CZ - SX * SY * SZ) * star->x +
632 (-CX * SZ) * star->y +
633 (SY * CZ + SZ * SX * CY) * star->z) +
635 arc->y = (short) ((sp->sizey.value *
636 ((CY * SZ + SX * SY * CZ) * star->x +
637 (CX * CZ) * star->y +
638 (SY * SZ - SX * CY * CZ) * star->z) +
641 if (MI_WIN_IS_USE3D(mi)) {
642 arcleft->x = (short) ((sp->sizex.value *
643 ((CY * CZ - SX * SY * SZ) * star->x +
644 (-CX * SZ) * star->y +
645 (SY * CZ + SZ * SX * CY) * star->z) +
647 arcleft->y = (short) ((sp->sizey.value *
648 ((CY * SZ + SX * SY * CZ) * star->x +
649 (CX * CZ) * star->y +
650 (SY * SZ - SX * CY * CZ) * star->z) +
655 if (star->size != 0) {
656 arc->x -= star->size;
657 arc->y -= star->size;
658 if (MI_WIN_IS_USE3D(mi)) {
659 arcleft->x -= star->size;
660 arcleft->y -= star->size;
665 /* First, we erase the previous starfield */
666 if (MI_WIN_IS_INSTALL(mi) && MI_WIN_IS_USE3D(mi))
667 XSetForeground(display, gc, MI_NONE_COLOR(mi));
669 XSetForeground(display, gc, MI_WIN_BLACK_PIXEL(mi));
671 #if (ADAPT_ERASE == 1)
672 if (sp->hasbeenchecked == 0) {
673 /* We just calculate which method is the faster and eventually free
674 * the oldxarc list */
676 ADAPT_ARC_PREFERED * sp->rect_time) {
677 sp->hasbeenchecked = -2; /* XFillRectangle mode */
678 (void) free((void *) sp->oldxarc);
680 if (MI_WIN_IS_USE3D(mi)) {
681 (void) free((void *) sp->oldxarcleft);
682 sp->oldxarcleft = NULL;
685 sp->hasbeenchecked = -1; /* XFillArcs mode */
688 if (sp->hasbeenchecked == -2) {
689 /* Erasing is done with XFillRectangle */
690 XFillRectangle(display, window, gc,
692 } else if (sp->hasbeenchecked == -1) {
693 /* Erasing is done with XFillArcs */
694 XFillArcs(display, window, gc,
695 sp->oldxarc, sp->NbStars);
696 if (MI_WIN_IS_USE3D(mi))
697 XFillArcs(display, window, gc,
698 sp->oldxarcleft, sp->NbStars);
702 if (sp->hasbeenchecked > ADAPT_CHECKS) {
703 #ifdef GETTIMEOFDAY_TWO_ARGS
704 (void) gettimeofday(&tv1, NULL);
706 (void) gettimeofday(&tv1);
708 XFillRectangle(display, window, gc,
710 #ifdef GETTIMEOFDAY_TWO_ARGS
711 (void) gettimeofday(&tv2, NULL);
713 (void) gettimeofday(&tv2);
715 usec = (tv2.tv_sec - tv1.tv_sec) * 1000000;
716 if (usec + tv2.tv_usec - tv1.tv_usec > 0) {
717 sp->rect_time += usec + tv2.tv_usec - tv1.tv_usec;
718 sp->hasbeenchecked--;
721 #ifdef GETTIMEOFDAY_TWO_ARGS
722 (void) gettimeofday(&tv1, NULL);
724 (void) gettimeofday(&tv1);
726 XFillArcs(display, window, gc,
727 sp->oldxarc, sp->NbStars);
728 if (MI_WIN_IS_USE3D(mi))
729 XFillArcs(display, window, gc,
730 sp->oldxarcleft, sp->NbStars);
731 #ifdef GETTIMEOFDAY_TWO_ARGS
732 (void) gettimeofday(&tv2, NULL);
734 (void) gettimeofday(&tv2);
736 usec = (tv2.tv_sec - tv1.tv_sec) * 1000000;
737 if (usec + tv2.tv_usec - tv1.tv_usec > 0) {
738 sp->xarc_time += usec + tv2.tv_usec - tv1.tv_usec;
739 sp->hasbeenchecked--;
744 #if (USEOLDXARCS == 1)
745 XFillArcs(display, window, gc,
746 sp->oldxarc, sp->NbStars);
747 if (MI_WIN_IS_USE3D(mi))
748 XFillArcs(display, window, gc,
749 sp->oldxarcleft, sp->NbStars);
751 XFillRectangle(display, window, gc,
756 /* Then we draw the new one */
757 if (MI_WIN_IS_USE3D(mi)) {
758 if (MI_WIN_IS_INSTALL(mi))
759 XSetFunction(display, gc, GXor);
760 XSetForeground(display, gc, MI_RIGHT_COLOR(mi));
761 XFillArcs(display, window, gc, sp->xarc, sp->NbStars);
762 XSetForeground(display, gc, MI_LEFT_COLOR(mi));
763 XFillArcs(display, window, gc, sp->xarcleft, sp->NbStars);
764 if (MI_WIN_IS_INSTALL(mi))
765 XSetFunction(display, gc, GXcopy);
767 XSetForeground(display, gc, sp->color);
768 XFillArcs(display, window, gc, sp->xarc, sp->NbStars);
771 #if ((USEOLDXARCS == 1) || (ADAPT_ERASE == 1))
772 #if (ADAPT_ERASE == 1)
773 if (sp->hasbeenchecked >= -1) {
775 sp->xarc = sp->oldxarc;
777 if (MI_WIN_IS_USE3D(mi)) {
778 arcleft = sp->xarcleft;
779 sp->xarcleft = sp->oldxarcleft;
780 sp->oldxarcleft = arcleft;
785 sp->xarc = sp->oldxarc;
787 if (MI_WIN_IS_USE3D(mi)) {
788 arcleft = sp->xarcleft;
789 sp->xarcleft = sp->oldxarcleft;
790 sp->oldxarcleft = arcleft;
795 /* We set up the color for the next drawing */
796 if (!MI_WIN_IS_USE3D(mi) && MI_NPIXELS(mi) > 2 &&
797 (++sp->colorchange >= COLOR_CHANGES)) {
799 if (++sp->colorp >= MI_NPIXELS(mi))
801 sp->color = MI_PIXEL(mi, sp->colorp);
806 release_bouboule(ModeInfo * mi)
808 if (starfield != NULL) {
811 for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
812 StarField *sp = &starfield[screen];
815 (void) free((void *) sp->star);
817 (void) free((void *) sp->xarc);
819 (void) free((void *) sp->xarcleft);
820 #if ((USEOLDXARCS == 1) || (ADAPT_ERASE == 1))
822 (void) free((void *) sp->oldxarc);
824 (void) free((void *) sp->oldxarcleft);
829 sinfree(&(sp->sizex));
830 sinfree(&(sp->sizey));
831 sinfree(&(sp->thetax));
832 sinfree(&(sp->thetay));
833 sinfree(&(sp->thetaz));
835 (void) free((void *) starfield);
841 refresh_bouboule(ModeInfo * mi)
843 /* Do nothing, it will refresh by itself */
846 XSCREENSAVER_MODULE ("Bouboule", bouboule)