/* Whirlygig -- an experiment in X programming * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation. No representations are made about the suitability of this * software for any purpose. It is provided "as is" without express or * implied warranty. * * When I was in trigonometry class as a kid, I remember being fascinated * by the beauty of the shapes one receives when playing with sine waves * Here is a little experiment to show that beauty is simple */ #include #include #include "screenhack.h" #ifdef HAVE_DOUBLE_BUFFER_EXTENSION # include "xdbe.h" #endif /* HAVE_DOUBLE_BUFFER_EXTENSION */ #define NCOLORS 100 #define FULL_CYCLE 429496729 #define START_ARC 0 #define END_ARC 23040 struct info { /* Bool writable; / * Is the screen writable */ double xspeed; /* A factor to modify the horizontal movement */ double yspeed; /* A factor to modify vertical movement */ double xamplitude; double yamplitude; int whirlies; /* How many whirlies per line do you want? */ int nlines; /* How many lines of whirlies do you want? */ int half_width; /* 1/2 the width of the screen */ int half_height; int speed; int trail; int color_modifier; double xoffset; double yoffset; double offset_period; Bool wrap; }; enum object_mode { spin_mode, funky_mode, circle_mode, linear_mode, test_mode, fun_mode, innie_mode, lissajous_mode }; struct state { Display *dpy; Window window; XGCValues gcv; /* The structure to hold the GC data */ XWindowAttributes xgwa; /* A structure to hold window data */ Pixmap b, ba; /* double-buffer to reduce flicker */ #ifdef HAVE_DOUBLE_BUFFER_EXTENSION Bool dbeclear_p; XdbeBackBuffer backb; #endif /* HAVE_DOUBLE_BUFFER_EXTENSION */ GC fgc, bgc; int screen; Bool dbuf; unsigned long int current_time; /* The global int telling the current time */ unsigned long int start_time; struct info *info; char *xmode_str, *ymode_str; /* holds the current mode for x and y computation */ /* pos is the current position x,y -- last_x contains one cell of every x coordinate for every position of every whirly in every line up to 100 whirlies in 100 lines -- lasy_y and last_size hold the same information for y and size respectively */ int pos[2], last_x[100][100], last_y[100][100], last_size[100][100]; int current_color; Bool wrap; int xmode, ymode; double modifier; /* for innie */ XColor colors[NCOLORS]; int ncolors; int explaining; }; static void draw_explain_string(struct state *, int, int, Display *, Window, GC); static void spin(struct state *, unsigned long int, struct info *, int *, int); static void funky(struct state *, unsigned long int, struct info *, int *, int); static void circle(struct state *, unsigned long int, struct info *, int *, int); static void fun(struct state *, unsigned long int, struct info *, int *, int); static void linear(struct state *, unsigned long int, struct info *, int *, int); static void lissajous(struct state *, unsigned long int, struct info *, int *, int); static void test(struct state *, unsigned long int, struct info *, int *, int); static void innie(struct state *, unsigned long int, struct info *, int *, int, double); static const char spin_explanation[] = "Spin mode is a simple sin/cos with every argument modified"; static const char funky_explanation[] = "Funky mode is me goofing off."; static const char circle_explanation[] = "Circle mode graphs the x and y positions as you trace the edge of a circle over time."; static const char linear_explanation[] = "Linear mode draws a straight line"; static const char test_explanation[] = "Test mode is a mode that I play around with ideas in."; static const char fun_explanation[] = "Fun mode is the coolest."; static const char innie_explanation[] = "Innie mode does something or other. Looks cool, though."; static const char lissajous_explanation[] = "Lissajous mode draws a slightly modified lissajous curve"; static void draw_explain_string(struct state *st, int mode, int offset, Display *dpy, Window window, GC fgc) { switch(mode) { case spin_mode: XDrawString(st->dpy, st->window, st->fgc, 50, offset, (char*) spin_explanation, strlen(spin_explanation)); break; case funky_mode: XDrawString(st->dpy, st->window, st->fgc, 50, offset, (char*) funky_explanation, strlen(funky_explanation)); break; case circle_mode: XDrawString(st->dpy, st->window, st->fgc, 50, offset, (char*) circle_explanation, strlen(circle_explanation)); break; case linear_mode: XDrawString(st->dpy, st->window, st->fgc, 50, offset, (char*) linear_explanation, strlen(linear_explanation)); break; case test_mode: XDrawString(st->dpy, st->window, st->fgc, 50, offset, (char*) test_explanation, strlen(test_explanation)); break; case fun_mode: XDrawString(st->dpy, st->window, st->fgc, 50, offset, (char*) fun_explanation, strlen(fun_explanation)); break; case innie_mode: XDrawString(st->dpy, st->window, st->fgc, 50, offset, (char*) innie_explanation, strlen(innie_explanation)); break; case lissajous_mode: XDrawString(st->dpy, st->window, st->fgc, 50, offset, (char*) lissajous_explanation, strlen(linear_explanation)); } } static void funky(struct state *st, unsigned long int the_time, struct info *info, int pos[], int index) { double new_time = ((the_time % 360 ) / 180.0) * M_PI; if (index == 0) { double time_modifier = cos(new_time / 180.0); double the_cos = cos((new_time * (double)st->info->xspeed) + (time_modifier * 80.0)); double dist_mod_x = cos(new_time) * (st->info->half_width - 50); st->pos[index]= st->info->xamplitude * (the_cos * dist_mod_x) + st->info->half_width; } else { double new_time = ((the_time % 360 ) / 180.0) * M_PI; double time_modifier = sin(new_time / 180.0); double the_sin = sin((new_time * (double)st->info->yspeed) + (time_modifier * 80.0)); double dist_mod_y = sin(new_time) * (st->info->half_height - 50); st->pos[index] = st->info->yamplitude * (the_sin * dist_mod_y) + st->info->half_height; } } static void innie(struct state *st, unsigned long int the_time, struct info *info, int pos[], int index, double modifier) { double frequency = 2000000.0 + (st->modifier * cos(((double)the_time / 100.0))); double arg = (double)the_time / frequency; double amplitude = 200.0 * cos(arg); double fun = 150.0 * cos((double)the_time / 2000.0); int vert_mod, horiz_mod; if (index == 0) { horiz_mod = (int)(fun * cos((double)the_time / 100.0)) + st->info->half_width; st->pos[index] = (amplitude * cos((double)the_time / 100.0 * st->info->xspeed)) + horiz_mod; } else { vert_mod = (int)(fun * sin((double)the_time / 100.0)) + st->info->half_height; st->pos[index] = (amplitude * sin((double)the_time / 100.0 * st->info->yspeed)) + vert_mod; } } static void lissajous(struct state *st, unsigned long int the_time, struct info *info, int pos[], int index) { /* This is a pretty standard lissajous curve x = a sin(nt + c) y = b sin(t) The n and c modifiers are cyclic as well, however... */ int result; double time = (double)the_time / 100.0; double fun = 15.0 * cos((double)the_time / 800.0); double weird = cos((time / 1100000.0) / 1000.0); if (index == 0) { result = st->info->xamplitude * 200.0 * sin((weird * time) + fun) + st->info->half_width; } else { result = st->info->yamplitude * 200.0 * sin(time) + st->info->half_height; } st->pos[index] = result; } static void circle(struct state *st, unsigned long int the_time, struct info *info, int pos[], int index) { int result; if (index == 0) { result = st->info->xamplitude * (cos((double)the_time / 100.0 * st->info->xspeed) * (st->info->half_width / 2)) + st->info->half_width; } else { result = st->info->yamplitude * (sin((double)the_time / 100.0 * st->info->yspeed) * (st->info->half_height / 2)) + st->info->half_height; } st->pos[index] = result; } #if 0 static void mod(unsigned long int the_time, struct info *info, int pos[], int index) { int amplitude; int max = st->info->half_width; if ((the_time % (max * 2)) < max) amplitude = max - ((the_time % (max * 2)) - max); else amplitude = the_time % (max * 2); amplitude = amplitude - max; } #endif static void spin(struct state *st, unsigned long int the_time, struct info *info, int pos[], int index) { double funky = (((the_time % 360) * 1.0) / 180.0) * M_PI; if (index ==0) { double the_cos = cos((double)the_time / (180.0 * st->info->xspeed)); double dist_mod_x = cos((double)funky) * (st->info->half_width - 50); st->pos[index] = st->info->xamplitude * (the_cos * dist_mod_x) + st->info->half_width; } else { double the_sin = sin((double)the_time / (180.0 * st->info->yspeed)); double dist_mod_y = sin((double)funky) * (st->info->half_height - 50); st->pos[index] = st->info->yamplitude * (the_sin * dist_mod_y) + st->info->half_height; } } static void fun(struct state *st, unsigned long int the_time, struct info *info, int pos[], int index) { int amplitude; int max = st->info->half_width; if ((the_time % (max * 2)) < max) amplitude = max - ((the_time % (max * 2)) - max); else amplitude = the_time % (max * 2); amplitude = amplitude - max; if (index ==0) { st->pos[index] = (amplitude * cos((double)the_time / 100.0 * st->info->xspeed)) + st->info->half_width; } else { st->pos[index] = (amplitude * sin((double)the_time / 100.0 * st->info->yspeed)) + st->info->half_height; } } static void linear(struct state *st, unsigned long int the_time, struct info *info, int pos[], int index) { if (index == 0) /* Calculate for the x axis */ st->pos[index] = ((the_time / 2) % (st->info->half_width * 2)); else st->pos[index] = ((the_time / 2) % (st->info->half_height * 2)); } static void test(struct state *st, unsigned long int the_time, struct info *info, int pos[], int index) { if (index == 0) { st->pos[index] = st->info->xamplitude * (cos((double)the_time / 100.0 * st->info->xspeed) * (st->info->half_width / 2)) + st->info->half_width; } else { st->pos[index] = st->info->yamplitude * (sin((double)the_time / 100.0 * st->info->yspeed) * (st->info->half_height / 2)) + st->info->half_height; } } static int preen(int current, int max) { if (current > max) current=current-max; if (current < 0) current=current+max; return(current); } #if 0 static void smoothen(struct state *st, int x, int lastx, int y, int lasty, int size, int last_color, XColor *colors, Display *dpy, Window window, GC bgc, int screen, struct info *info) { double xdistance = abs((double)x-(double)lastx); double ydistance = abs((double)y-(double)lasty); double distance = sqrt(((xdistance * xdistance) + (ydistance * ydistance)) ); double slope = (((double)y-(double)lasty) / ((double)x-(double)lastx)); printf("Starting smoothen with values: %f, %f, %f, %f\n", xdistance, ydistance, distance, slope); if (distance > 2.0) { int newx = (int)((xdistance / distance) * slope); int newy = (int)((ydistance / distance) * slope); if (! st->info->trail) { XSetForeground(st->dpy, st->bgc, BlackPixel(st->dpy, st->screen)); XFillArc(st->dpy, st->window, st->bgc, lastx, lasty, size, size, START_ARC, END_ARC); } XSetForeground(st->dpy, st->bgc, st->colors[last_color].pixel); XFillArc(st->dpy, st->window, st->bgc, newx, newy, size, size, START_ARC, END_ARC); smoothen(st, newx, x, newy, y, size, last_color, st->colors, st->dpy, st->window, st->bgc, st->screen, st->info); } } #endif static void * whirlygig_init (Display *dpy, Window window) { struct state *st = (struct state *) calloc (1, sizeof(*st)); st->dpy = dpy; st->window = window; st->ncolors = NCOLORS; st->dbuf = get_boolean_resource (st->dpy, "doubleBuffer", "Boolean"); # ifdef HAVE_JWXYZ /* Don't second-guess Quartz's double-buffering */ st->dbuf = False; # endif st->start_time = st->current_time; st->info = (struct info *)malloc(sizeof(struct info)); st->screen = DefaultScreen(st->dpy); XGetWindowAttributes (st->dpy, st->window, &st->xgwa); if (st->dbuf) { #ifdef HAVE_DOUBLE_BUFFER_EXTENSION if (get_boolean_resource(st->dpy,"useDBE","Boolean")) { st->dbeclear_p = get_boolean_resource (st->dpy, "useDBEClear", "Boolean"); if (st->dbeclear_p) st->b = xdbe_get_backbuffer (st->dpy, st->window, XdbeBackground); else st->b = xdbe_get_backbuffer (st->dpy, st->window, XdbeUndefined); st->backb = st->b; } #endif /* HAVE_DOUBLE_BUFFER_EXTENSION */ if (!st->b) { st->ba = XCreatePixmap (st->dpy, st->window, st->xgwa.width, st->xgwa.height,st->xgwa.depth); st->b = st->ba; } } else { st->b = st->window; } st->gcv.foreground = get_pixel_resource(st->dpy, st->xgwa.colormap, "foreground", "Foreground"); st->fgc = XCreateGC (st->dpy, st->b, GCForeground, &st->gcv); st->gcv.foreground = get_pixel_resource(st->dpy, st->xgwa.colormap, "background", "Background"); st->bgc = XCreateGC (st->dpy, st->b, GCForeground, &st->gcv); #ifdef HAVE_JWXYZ /* #### should turn off double-buffering instead */ jwxyz_XSetAntiAliasing (dpy, st->fgc, False); jwxyz_XSetAntiAliasing (dpy, st->bgc, False); #endif { Bool writable_p = False; make_uniform_colormap (st->xgwa.screen, st->xgwa.visual, st->xgwa.colormap, st->colors, &st->ncolors, True, &writable_p, True); } if (st->ba) XFillRectangle (st->dpy, st->ba, st->bgc, 0, 0, st->xgwa.width, st->xgwa.height); /* info is a structure holding all the random pieces of information I may want to pass to my baby functions -- much of it I may never use, but it is nice to have around just in case I want it to make a funky function funkier */ /* info->writable = get_boolean_resource (dpy, "cycle", "Boolean"); */ st->info->xspeed = get_float_resource(st->dpy, "xspeed" , "Float"); st->info->yspeed = get_float_resource(st->dpy, "yspeed" , "Float"); st->info->xamplitude = get_float_resource(st->dpy, "xamplitude", "Float"); st->info->yamplitude = get_float_resource(st->dpy, "yamplitude", "Float"); st->info->offset_period = get_float_resource(st->dpy, "offset_period", "Float"); st->info->whirlies = get_integer_resource(st->dpy, "whirlies", "Integer"); st->info->nlines = get_integer_resource(st->dpy, "nlines", "Integer"); st->info->half_width = st->xgwa.width / 2; st->info->half_height = st->xgwa.height / 2; st->info->speed = get_integer_resource(st->dpy, "speed" , "Integer"); st->info->trail = get_boolean_resource(st->dpy, "trail", "Integer"); st->info->color_modifier = get_integer_resource(st->dpy, "color_modifier", "Integer"); st->info->xoffset = get_float_resource(st->dpy, "xoffset", "Float"); st->info->yoffset = get_float_resource(st->dpy, "yoffset", "Float"); st->xmode_str = get_string_resource(st->dpy, "xmode", "Mode"); st->ymode_str = get_string_resource(st->dpy, "ymode", "Mode"); st->wrap = get_boolean_resource(st->dpy, "wrap", "Boolean"); st->modifier = 3000.0 + frand(1500.0); if (! st->xmode_str) st->xmode = spin_mode; else if (! strcmp (st->xmode_str, "spin")) st->xmode = spin_mode; else if (! strcmp (st->xmode_str, "funky")) st->xmode = funky_mode; else if (! strcmp (st->xmode_str, "circle")) st->xmode = circle_mode; else if (! strcmp (st->xmode_str, "linear")) st->xmode = linear_mode; else if (! strcmp (st->xmode_str, "test")) st->xmode = test_mode; else if (! strcmp (st->xmode_str, "fun")) st->xmode = fun_mode; else if (! strcmp (st->xmode_str, "innie")) st->xmode = innie_mode; else if (! strcmp (st->xmode_str, "lissajous")) st->xmode = lissajous_mode; else { st->xmode = random() % (int) lissajous_mode; } if (! st->ymode_str) st->ymode = spin_mode; else if (! strcmp (st->ymode_str, "spin")) st->ymode = spin_mode; else if (! strcmp (st->ymode_str, "funky")) st->ymode = funky_mode; else if (! strcmp (st->ymode_str, "circle")) st->ymode = circle_mode; else if (! strcmp (st->ymode_str, "linear")) st->ymode = linear_mode; else if (! strcmp (st->ymode_str, "test")) st->ymode = test_mode; else if (! strcmp (st->ymode_str, "fun")) st->ymode = fun_mode; else if (! strcmp (st->ymode_str, "innie")) st->ymode = innie_mode; else if (! strcmp (st->ymode_str, "lissajous")) st->ymode = lissajous_mode; else { st->ymode = random() % (int) lissajous_mode; } if (get_integer_resource(st->dpy, "start_time", "Integer") == -1) st->current_time = (unsigned long int)(random()); else st->current_time = get_integer_resource(st->dpy, "start_time", "Integer"); if (st->info->whirlies == -1) st->info->whirlies = 1 + (random() % 15); if (st->info->nlines == -1) st->info->nlines = 1 + (random() % 5); if (st->info->color_modifier == -1) st->info->color_modifier = 1 + (random() % 25); if (get_boolean_resource(st->dpy, "explain", "Integer")) st->explaining = 1; st->current_color = 1 + (random() % NCOLORS); return st; } static unsigned long whirlygig_draw (Display *dpy, Window window, void *closure) { struct state *st = (struct state *) closure; int wcount; /* wcount is a counter incremented for every whirly take note of internal_time before you mess with it */ int change_time = 4000; if (st->explaining == 1) { XClearWindow (st->dpy, st->window); draw_explain_string(st, st->xmode, st->info->half_height-100, st->dpy, st->window, st->fgc); st->explaining++; return 3000000; } else if (st->explaining == 2) { XClearWindow (st->dpy, st->window); st->explaining = 0; } if (! strcmp (st->xmode_str, "change") && ! strcmp (st->ymode_str, "change")) { if ((st->current_time - st->start_time) > change_time) { st->start_time = st->current_time; st->xmode = 1 + (random() % 4); st->ymode = 1 + (random() % 4); } } else if (! strcmp (st->xmode_str, "change")) { if ((st->current_time - st->start_time) > change_time) { st->start_time = st->current_time; st->xmode = 1 + (random() % 4); } } else if (! strcmp (st->ymode_str, "change")) { if ((st->current_time - st->start_time) > change_time) { st->start_time = st->current_time; st->ymode = 1 + (random() % 3); printf("Changing ymode to %d\n", st->ymode); } } if (++st->current_color >= NCOLORS) st->current_color = 0; for (wcount = 0; wcount < st->info->whirlies; wcount++) { int lcount; /* lcount is a counter for every line -- take note of the offsets changing */ int internal_time = 0; int color_offset = (st->current_color + (st->info->color_modifier * wcount)) % NCOLORS; if (st->current_time != 0) /* I want the distance between whirlies to increase more each whirly */ internal_time = st->current_time + (10 * wcount) + (wcount * wcount); switch (st->xmode) { /* All these functions expect an int time, the struct info, a pointer to an array of positions, and the index that the the function will fill of the array */ case spin_mode: spin(st, internal_time, st->info, st->pos, 0); break; case funky_mode: funky(st, internal_time, st->info, st->pos, 0); break; case circle_mode: circle(st, internal_time, st->info, st->pos, 0); break; case linear_mode: linear(st, internal_time, st->info, st->pos, 0); break; case fun_mode: fun(st, internal_time, st->info, st->pos, 0); break; case test_mode: test(st, internal_time, st->info, st->pos, 0); break; case innie_mode: innie(st, internal_time, st->info, st->pos, 0, st->modifier); break; case lissajous_mode: lissajous(st, internal_time, st->info, st->pos, 0); break; default: spin(st, internal_time, st->info, st->pos, 0); break; } /* End of the switch for the x position*/ switch (st->ymode) { case spin_mode: spin(st, internal_time, st->info, st->pos, 1); break; case funky_mode: funky(st, internal_time, st->info, st->pos, 1); break; case circle_mode: circle(st, internal_time, st->info, st->pos, 1); break; case linear_mode: linear(st, internal_time, st->info, st->pos, 1); break; case fun_mode: fun(st, internal_time, st->info, st->pos, 1); break; case test_mode: test(st, internal_time, st->info, st->pos, 1); break; case innie_mode: innie(st, internal_time, st->info, st->pos, 1, st->modifier); break; case lissajous_mode: lissajous(st, internal_time, st->info, st->pos, 1); break; default: spin(st, internal_time, st->info, st->pos, 1); break; } /* End of the switch for the y position*/ for (lcount = 0; lcount < st->info->nlines; lcount++) { double arg = (double)((internal_time * st->info->offset_period) / 90.0); double line_offset = 20.0 * (double)lcount * sin(arg); int size; size = (int)(15.0 + 5.0 * sin((double)internal_time / 180.0)); /* First delete the old circle... */ if (!st->info->trail #ifdef HAVE_DOUBLE_BUFFER_EXTENSION && ( !st->dbeclear_p || !st->backb) #endif /* HAVE_DOUBLE_BUFFER_EXTENSION */ ) { XSetForeground(st->dpy, st->bgc, BlackPixel(st->dpy, st->screen)); XFillArc(st->dpy, st->b, st->bgc, st->last_x[wcount][lcount], st->last_y[wcount][lcount], st->last_size[wcount][lcount], st->last_size[wcount][lcount], START_ARC, END_ARC); } /* Now, lets draw in the new circle */ { /* Starting new scope for local x_pos and y_pos */ int xpos, ypos; if (st->wrap) { xpos = preen((int)(st->info->xoffset*line_offset)+st->pos[0], st->info->half_width * 2); ypos = preen((int)(st->info->yoffset*line_offset)+st->pos[1], st->info->half_height * 2); } else { xpos = (int)(st->info->xoffset*line_offset)+st->pos[0]; ypos = (int)(st->info->yoffset*line_offset)+st->pos[1]; } if (st->start_time == st->current_time) { /* smoothen should move from one mode to another prettily... */ /* Note: smoothen has not been modified to take the double buffering code into account, and needs to be hacked on before uncommenting. */ /* smoothen(xpos, last_x[wcount][lcount], ypos, last_y[wcount][lcount], size, color_offset, colors, dpy, window, bgc, screen, info); */ } st->last_x[wcount][lcount] = xpos; st->last_y[wcount][lcount] = ypos; st->last_size[wcount][lcount] = size; XSetForeground(st->dpy, st->bgc, st->colors[color_offset].pixel); XFillArc(st->dpy, st->b, st->bgc, xpos, ypos, size, size, START_ARC, END_ARC); } /* End of my temporary scope for xpos and ypos */ } /* End of the for each line in nlines */ } /* End of the for each whirly in whirlies */ #ifdef HAVE_DOUBLE_BUFFER_EXTENSION if (st->backb) { XdbeSwapInfo info[1]; info[0].swap_window = st->window; info[0].swap_action = (st->dbeclear_p ? XdbeBackground : XdbeUndefined); XdbeSwapBuffers (st->dpy, info, 1); } else #endif /* HAVE_DOUBLE_BUFFER_EXTENSION */ if (st->dbuf) { XCopyArea (st->dpy, st->b, st->window, st->bgc, 0, 0, st->xgwa.width, st->xgwa.height, 0, 0); } if (st->current_time == FULL_CYCLE) st->current_time = 1; else st->current_time = st->current_time + st->info->speed; return 10000; } static void whirlygig_reshape (Display *dpy, Window window, void *closure, unsigned int w, unsigned int h) { } static Bool whirlygig_event (Display *dpy, Window window, void *closure, XEvent *event) { return False; } static void whirlygig_free (Display *dpy, Window window, void *closure) { struct state *st = (struct state *) closure; free (st->info); XFreeGC (dpy, st->fgc); XFreeGC (dpy, st->bgc); if (st->xmode_str) free (st->xmode_str); if (st->ymode_str) free (st->ymode_str); free (st); } static const char *whirlygig_defaults [] = { ".background: black", ".foreground: white", "*fpsSolid: true", "*xspeed: 1.0", "*yspeed: 1.0", "*xamplitude: 1.0", "*yamplitude: 1.0", "*whirlies: -1", "*nlines: -1", "*xmode: change", "*ymode: change", "*speed: 1", "*trail: false", "*color_modifier: -1", "*start_time: -1", "*explain: False", "*xoffset: 1.0", "*yoffset: 1.0", "*offset_period: 1", "*wrap: False", "*doubleBuffer: True", #ifdef HAVE_DOUBLE_BUFFER_EXTENSION "*useDBEClear: True", "*useDBE: True", #endif /* HAVE_DOUBLE_BUFFER_EXTENSION */ 0 }; static XrmOptionDescRec whirlygig_options [] = { { "-xspeed", ".xspeed", XrmoptionSepArg, 0 }, /* xspeed is a modifier of the argument to cos -- changing it thus changes the frequency of cos */ { "-yspeed", ".yspeed", XrmoptionSepArg, 0 }, /* Similiarly, yspeed changes the frequency of sin */ { "-xamplitude", ".xamplitude", XrmoptionSepArg, 0 }, /* A factor by which to increase/decrease the amplitude of the sin */ { "-yamplitude", ".yamplitude", XrmoptionSepArg, 0 }, /* A factor by which to increase/decrease the amplitude of the cos */ { "-whirlies", ".whirlies",XrmoptionSepArg, 0 }, /* whirlies defines the number of circles to draw per line */ { "-nlines", ".nlines",XrmoptionSepArg, 0 }, /* nlines is the number of lines of whirlies to draw */ { "-xmode", ".xmode", XrmoptionSepArg, 0 }, /* There are a few different modes that I have written -- each mode is in theory a different experiment with the possible modifiers to sin/cos */ { "-ymode", ".ymode", XrmoptionSepArg, 0 }, { "-speed", ".speed", XrmoptionSepArg, 0 }, /* This will modify how often it should draw, changing it will probably suck */ { "-trail", ".trail", XrmoptionNoArg, "True" }, /* Control whether or not you want the old circles to be erased */ { "-color_modifier", ".color_modifier", XrmoptionSepArg, 0 }, /* How many colors away from the current should the next whirly be? */ { "-start_time", ".start_time", XrmoptionSepArg, 0 }, /* Specify exactly at what time to start graphing... */ { "-xoffset", ".xoffset", XrmoptionSepArg, 0 }, /* Tell the whirlies to be offset by this factor of a sin */ { "-yoffset", ".yoffset", XrmoptionSepArg, 0 }, /* Tell the whirlies to be offset by this factor of a cos */ { "-offset_period", ".offset_period", XrmoptionSepArg, 0 }, /* Change the period of an offset cycle */ { "-explain", ".explain", XrmoptionNoArg, "True" }, /* Specify whether or not to print an explanation of the function used. */ { "-wrap", ".wrap", XrmoptionNoArg, "True" }, { "-no-wrap", ".wrap", XrmoptionNoArg, "False" }, /* Specify if you want whirlies which are out of the boundary of the screen to be wrapped around to the other side */ { "-db", ".doubleBuffer", XrmoptionNoArg, "True" }, { "-no-db", ".doubleBuffer", XrmoptionNoArg, "False" }, { 0, 0, 0, 0 } }; XSCREENSAVER_MODULE ("Whirlygig", whirlygig)