/* 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 <stdio.h>
#include <math.h>
#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)
{
}
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)