-/* xscreensaver, Copyright (c) 1992, 1995, 1996, 1997, 1998, 2001
+/* xscreensaver, Copyright (c) 1992, 1995, 1996, 1997, 1998, 2001, 2006
* Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
#include "screenhack.h"
#include "spline.h"
+/* The normal (and max) width for a graph bar */
+#define BAR_SIZE 11
+#define MAX_SIZE 16
+#define min(a,b) ((a)<(b)?(a):(b))
+#define max(a,b) ((a)>(b)?(a):(b))
+
+
+enum object_mode {
+ ball_mode, line_mode, polygon_mode, spline_mode, spline_filled_mode,
+ tail_mode
+};
+
+enum graph_mode {
+ graph_none, graph_x, graph_y, graph_both, graph_speed
+};
+
struct ball {
double x, y;
double vx, vy;
int hue;
};
-static struct ball *balls;
-static double *x_vels;
-static double *y_vels;
-static double *speeds;
-static int npoints;
-static int threshold;
-static int delay;
-static int global_size;
-static int segments;
-static Bool glow_p;
-static Bool orbit_p;
-static Bool walls_p;
-static Bool maxspeed_p;
-static Bool cbounce_p;
-static XPoint *point_stack;
-static int point_stack_size, point_stack_fp;
-static XColor *colors;
-static int ncolors;
-static int fg_index;
-static int color_shift;
-Bool no_erase_yet; /* for tail mode fix */
-
-/*flip mods for mouse interaction*/
-static Bool mouse_p;
-int mouse_x, mouse_y, mouse_mass, root_x, root_y;
-static double viscosity;
-
-static enum object_mode {
- ball_mode, line_mode, polygon_mode, spline_mode, spline_filled_mode,
- tail_mode
-} mode;
+struct state {
+ struct ball *balls;
+ double *x_vels;
+ double *y_vels;
+ double *speeds;
+ int npoints;
+ int threshold;
+ int delay;
+ int global_size;
+ int segments;
+ Bool glow_p;
+ Bool orbit_p;
+ Bool walls_p;
+ Bool maxspeed_p;
+ Bool cbounce_p;
+ XPoint *point_stack;
+ int point_stack_size, point_stack_fp;
+ XColor *colors;
+ int ncolors;
+ int fg_index;
+ int color_shift;
+ int xlim, ylim;
+ Bool no_erase_yet; /* for tail mode fix */
-static enum graph_mode {
- graph_none, graph_x, graph_y, graph_both, graph_speed
-} graph_mode;
+ /*flip mods for mouse interaction*/
+ Bool mouse_p;
+ int mouse_x, mouse_y, mouse_mass, root_x, root_y;
+ double viscosity;
-static GC draw_gc, erase_gc;
+ enum object_mode mode;
+ enum graph_mode graph_mode;
-/* The normal (and max) width for a graph bar */
-#define BAR_SIZE 11
-#define MAX_SIZE 16
-#define min(a,b) ((a)<(b)?(a):(b))
-#define max(a,b) ((a)>(b)?(a):(b))
+ GC draw_gc, erase_gc;
-static void
-init_balls (Display *dpy, Window window)
+ int total_ticks;
+ int color_tick;
+ spline *spl;
+};
+
+
+static void *
+attraction_init (Display *dpy, Window window)
{
+ struct state *st = (struct state *) calloc (1, sizeof(*st));
int i;
XWindowAttributes xgwa;
XGCValues gcv;
- int xlim, ylim, midx, midy, r, vx, vy;
+ int midx, midy, r, vx, vy;
double th;
Colormap cmap;
char *mode_str, *graph_mode_str;
XGetWindowAttributes (dpy, window, &xgwa);
- xlim = xgwa.width;
- ylim = xgwa.height;
+ st->xlim = xgwa.width;
+ st->ylim = xgwa.height;
cmap = xgwa.colormap;
- midx = xlim/2;
- midy = ylim/2;
- walls_p = get_boolean_resource ("walls", "Boolean");
+ midx = st->xlim/2;
+ midy = st->ylim/2;
+ st->walls_p = get_boolean_resource (dpy, "walls", "Boolean");
/* if there aren't walls, don't set a limit on the radius */
- r = get_integer_resource ("radius", "Integer");
- if (r <= 0 || (r > min (xlim/2, ylim/2) && walls_p) )
- r = min (xlim/2, ylim/2) - 50;
+ r = get_integer_resource (dpy, "radius", "Integer");
+ if (r <= 0 || (r > min (st->xlim/2, st->ylim/2) && st->walls_p) )
+ r = min (st->xlim/2, st->ylim/2) - 50;
- vx = get_integer_resource ("vx", "Integer");
- vy = get_integer_resource ("vy", "Integer");
+ vx = get_integer_resource (dpy, "vx", "Integer");
+ vy = get_integer_resource (dpy, "vy", "Integer");
- npoints = get_integer_resource ("points", "Integer");
- if (npoints < 1)
- npoints = 3 + (random () % 5);
- balls = (struct ball *) malloc (npoints * sizeof (struct ball));
+ st->npoints = get_integer_resource (dpy, "points", "Integer");
+ if (st->npoints < 1)
+ st->npoints = 3 + (random () % 5);
+ st->balls = (struct ball *) malloc (st->npoints * sizeof (struct ball));
- no_erase_yet = 1; /* for tail mode fix */
+ st->no_erase_yet = 1; /* for tail mode fix */
- segments = get_integer_resource ("segments", "Integer");
- if (segments < 0) segments = 1;
+ st->segments = get_integer_resource (dpy, "segments", "Integer");
+ if (st->segments < 0) st->segments = 1;
- threshold = get_integer_resource ("threshold", "Integer");
- if (threshold < 0) threshold = 0;
+ st->threshold = get_integer_resource (dpy, "threshold", "Integer");
+ if (st->threshold < 0) st->threshold = 0;
- delay = get_integer_resource ("delay", "Integer");
- if (delay < 0) delay = 0;
+ st->delay = get_integer_resource (dpy, "delay", "Integer");
+ if (st->delay < 0) st->delay = 0;
- global_size = get_integer_resource ("size", "Integer");
- if (global_size < 0) global_size = 0;
+ st->global_size = get_integer_resource (dpy, "size", "Integer");
+ if (st->global_size < 0) st->global_size = 0;
- glow_p = get_boolean_resource ("glow", "Boolean");
+ st->glow_p = get_boolean_resource (dpy, "glow", "Boolean");
- orbit_p = get_boolean_resource ("orbit", "Boolean");
+ st->orbit_p = get_boolean_resource (dpy, "orbit", "Boolean");
- maxspeed_p = get_boolean_resource ("maxspeed", "Boolean");
+ st->maxspeed_p = get_boolean_resource (dpy, "maxspeed", "Boolean");
- cbounce_p = get_boolean_resource ("cbounce", "Boolean");
+ st->cbounce_p = get_boolean_resource (dpy, "cbounce", "Boolean");
- color_shift = get_integer_resource ("colorShift", "Integer");
- if (color_shift <= 0) color_shift = 5;
+ st->color_shift = get_integer_resource (dpy, "colorShift", "Integer");
+ if (st->color_shift <= 0) st->color_shift = 5;
/*flip mods for mouse interaction*/
- mouse_p = get_boolean_resource ("mouse", "Boolean");
- mouse_mass = get_integer_resource ("mouseSize", "Integer");
- mouse_mass = mouse_mass * mouse_mass *10;
-
- viscosity = get_float_resource ("viscosity", "Float");
-
- mode_str = get_string_resource ("mode", "Mode");
- if (! mode_str) mode = ball_mode;
- else if (!strcmp (mode_str, "balls")) mode = ball_mode;
- else if (!strcmp (mode_str, "lines")) mode = line_mode;
- else if (!strcmp (mode_str, "polygons")) mode = polygon_mode;
- else if (!strcmp (mode_str, "tails")) mode = tail_mode;
- else if (!strcmp (mode_str, "splines")) mode = spline_mode;
- else if (!strcmp (mode_str, "filled-splines"))mode = spline_filled_mode;
+ st->mouse_p = get_boolean_resource (dpy, "mouse", "Boolean");
+ st->mouse_mass = get_integer_resource (dpy, "mouseSize", "Integer");
+ st->mouse_mass = st->mouse_mass * st->mouse_mass *10;
+
+ st->viscosity = get_float_resource (dpy, "viscosity", "Float");
+
+ mode_str = get_string_resource (dpy, "mode", "Mode");
+ if (! mode_str) st->mode = ball_mode;
+ else if (!strcmp (mode_str, "balls")) st->mode = ball_mode;
+ else if (!strcmp (mode_str, "lines")) st->mode = line_mode;
+ else if (!strcmp (mode_str, "polygons")) st->mode = polygon_mode;
+ else if (!strcmp (mode_str, "tails")) st->mode = tail_mode;
+ else if (!strcmp (mode_str, "splines")) st->mode = spline_mode;
+ else if (!strcmp (mode_str, "filled-splines"))st->mode = spline_filled_mode;
else {
fprintf (stderr,
"%s: mode must be balls, lines, tails, polygons, splines, or\n\
exit (1);
}
- graph_mode_str = get_string_resource ("graphmode", "Mode");
- if (! graph_mode_str) graph_mode = graph_none;
- else if (!strcmp (graph_mode_str, "x")) graph_mode = graph_x;
- else if (!strcmp (graph_mode_str, "y")) graph_mode = graph_y;
- else if (!strcmp (graph_mode_str, "both")) graph_mode = graph_both;
- else if (!strcmp (graph_mode_str, "speed")) graph_mode = graph_speed;
- else if (!strcmp (graph_mode_str, "none")) graph_mode = graph_none;
+ graph_mode_str = get_string_resource (dpy, "graphmode", "Mode");
+ if (! graph_mode_str) st->graph_mode = graph_none;
+ else if (!strcmp (graph_mode_str, "x")) st->graph_mode = graph_x;
+ else if (!strcmp (graph_mode_str, "y")) st->graph_mode = graph_y;
+ else if (!strcmp (graph_mode_str, "both")) st->graph_mode = graph_both;
+ else if (!strcmp (graph_mode_str, "speed")) st->graph_mode = graph_speed;
+ else if (!strcmp (graph_mode_str, "none")) st->graph_mode = graph_none;
else {
fprintf (stderr,
"%s: graphmode must be speed, x, y, both, or none, not \"%s\"\n",
}
/* only allocate memory if it is needed */
- if(graph_mode != graph_none)
+ if(st->graph_mode != graph_none)
{
- if(graph_mode == graph_x || graph_mode == graph_both)
- x_vels = (double *) malloc (npoints * sizeof (double));
- if(graph_mode == graph_y || graph_mode == graph_both)
- y_vels = (double *) malloc (npoints * sizeof (double));
- if(graph_mode == graph_speed)
- speeds = (double *) malloc (npoints * sizeof (double));
+ if(st->graph_mode == graph_x || st->graph_mode == graph_both)
+ st->x_vels = (double *) malloc (st->npoints * sizeof (double));
+ if(st->graph_mode == graph_y || st->graph_mode == graph_both)
+ st->y_vels = (double *) malloc (st->npoints * sizeof (double));
+ if(st->graph_mode == graph_speed)
+ st->speeds = (double *) malloc (st->npoints * sizeof (double));
}
- if (mode != ball_mode && mode != tail_mode) glow_p = False;
+ if (st->mode != ball_mode && st->mode != tail_mode) st->glow_p = False;
- if (mode == polygon_mode && npoints < 3)
- mode = line_mode;
+ if (st->mode == polygon_mode && st->npoints < 3)
+ st->mode = line_mode;
- ncolors = get_integer_resource ("colors", "Colors");
- if (ncolors < 2) ncolors = 2;
- if (ncolors <= 2) mono_p = True;
- colors = 0;
+ st->ncolors = get_integer_resource (dpy, "colors", "Colors");
+ if (st->ncolors < 2) st->ncolors = 2;
+ if (st->ncolors <= 2) mono_p = True;
+ st->colors = 0;
if (!mono_p)
{
- fg_index = 0;
- switch (mode)
+ st->fg_index = 0;
+ switch (st->mode)
{
case ball_mode:
- if (glow_p)
+ if (st->glow_p)
{
int H = random() % 360;
double S1 = 0.25;
double S2 = 1.00;
double V = frand(0.25) + 0.75;
- colors = (XColor *) malloc(sizeof(*colors) * (ncolors+1));
- make_color_ramp (dpy, cmap, H, S1, V, H, S2, V, colors, &ncolors,
+ st->colors = (XColor *) malloc(sizeof(*st->colors) * (st->ncolors+1));
+ make_color_ramp (dpy, cmap, H, S1, V, H, S2, V, st->colors, &st->ncolors,
False, True, False);
}
else
{
- ncolors = npoints;
- colors = (XColor *) malloc(sizeof(*colors) * (ncolors+1));
- make_random_colormap (dpy, xgwa.visual, cmap, colors, &ncolors,
+ st->ncolors = st->npoints;
+ st->colors = (XColor *) malloc(sizeof(*st->colors) * (st->ncolors+1));
+ make_random_colormap (dpy, xgwa.visual, cmap, st->colors, &st->ncolors,
True, True, False, True);
}
break;
case spline_mode:
case spline_filled_mode:
case tail_mode:
- colors = (XColor *) malloc(sizeof(*colors) * (ncolors+1));
- make_smooth_colormap (dpy, xgwa.visual, cmap, colors, &ncolors,
+ st->colors = (XColor *) malloc(sizeof(*st->colors) * (st->ncolors+1));
+ make_smooth_colormap (dpy, xgwa.visual, cmap, st->colors, &st->ncolors,
True, False, True);
break;
default:
}
}
- if (!mono_p && ncolors <= 2)
+ if (!mono_p && st->ncolors <= 2)
{
- if (colors) free (colors);
- colors = 0;
+ if (st->colors) free (st->colors);
+ st->colors = 0;
mono_p = True;
}
- if (mode != ball_mode)
+ if (st->mode != ball_mode)
{
- int size = (segments ? segments : 1);
- point_stack_size = size * (npoints + 1);
- point_stack = (XPoint *) calloc (point_stack_size, sizeof (XPoint));
- point_stack_fp = 0;
+ int size = (st->segments ? st->segments : 1);
+ st->point_stack_size = size * (st->npoints + 1);
+ st->point_stack = (XPoint *) calloc (st->point_stack_size, sizeof (XPoint));
+ st->point_stack_fp = 0;
}
- gcv.line_width = (mode == tail_mode
- ? (global_size ? global_size : (MAX_SIZE * 2 / 3))
+ gcv.line_width = (st->mode == tail_mode
+ ? (st->global_size ? st->global_size : (MAX_SIZE * 2 / 3))
: 1);
- gcv.cap_style = (mode == tail_mode ? CapRound : CapButt);
+ gcv.cap_style = (st->mode == tail_mode ? CapRound : CapButt);
if (mono_p)
- gcv.foreground = get_pixel_resource("foreground", "Foreground", dpy, cmap);
+ gcv.foreground = get_pixel_resource(dpy, cmap, "foreground", "Foreground");
else
- gcv.foreground = colors[fg_index].pixel;
- draw_gc = XCreateGC (dpy, window, GCForeground|GCLineWidth|GCCapStyle, &gcv);
+ gcv.foreground = st->colors[st->fg_index].pixel;
+ st->draw_gc = XCreateGC (dpy, window, GCForeground|GCLineWidth|GCCapStyle, &gcv);
+
+ gcv.foreground = get_pixel_resource(dpy, cmap, "background", "Background");
+ st->erase_gc = XCreateGC (dpy, window, GCForeground|GCLineWidth|GCCapStyle,&gcv);
- gcv.foreground = get_pixel_resource("background", "Background", dpy, cmap);
- erase_gc = XCreateGC (dpy, window, GCForeground|GCLineWidth|GCCapStyle,&gcv);
+#ifdef HAVE_COCOA
+ jwxyz_XSetAntiAliasing (dpy, st->draw_gc, False);
+ jwxyz_XSetAntiAliasing (dpy, st->erase_gc, False);
+#endif
-#define rand_size() min (MAX_SIZE, 8 + (random () % (MAX_SIZE - 9)))
+ /* let's make the balls bigger by default */
+#define rand_size() (3 * (8 + (random () % 7)))
- if (orbit_p && !global_size)
+ if (st->orbit_p && !st->global_size)
/* To orbit, all objects must be the same mass, or the math gets
really hairy... */
- global_size = rand_size ();
+ st->global_size = rand_size ();
+ RETRY_NO_ORBIT:
th = frand (M_PI+M_PI);
- for (i = 0; i < npoints; i++)
+ for (i = 0; i < st->npoints; i++)
{
- int new_size = (global_size ? global_size : rand_size ());
- balls [i].dx = 0;
- balls [i].dy = 0;
- balls [i].size = new_size;
- balls [i].mass = (new_size * new_size * 10);
- balls [i].x = midx + r * cos (i * ((M_PI+M_PI) / npoints) + th);
- balls [i].y = midy + r * sin (i * ((M_PI+M_PI) / npoints) + th);
- if (! orbit_p)
+ int new_size = (st->global_size ? st->global_size : rand_size ());
+ st->balls [i].dx = 0;
+ st->balls [i].dy = 0;
+ st->balls [i].size = new_size;
+ st->balls [i].mass = (new_size * new_size * 10);
+ st->balls [i].x = midx + r * cos (i * ((M_PI+M_PI) / st->npoints) + th);
+ st->balls [i].y = midy + r * sin (i * ((M_PI+M_PI) / st->npoints) + th);
+ if (! st->orbit_p)
{
- balls [i].vx = vx ? vx : ((6.0 - (random () % 11)) / 8.0);
- balls [i].vy = vy ? vy : ((6.0 - (random () % 11)) / 8.0);
+ st->balls [i].vx = vx ? vx : ((6.0 - (random () % 11)) / 8.0);
+ st->balls [i].vy = vy ? vy : ((6.0 - (random () % 11)) / 8.0);
}
- if (mono_p || mode != ball_mode)
- balls [i].pixel_index = -1;
- else if (glow_p)
- balls [i].pixel_index = 0;
+ if (mono_p || st->mode != ball_mode)
+ st->balls [i].pixel_index = -1;
+ else if (st->glow_p)
+ st->balls [i].pixel_index = 0;
else
- balls [i].pixel_index = random() % ncolors;
+ st->balls [i].pixel_index = random() % st->ncolors;
}
/* This lets modes where the points don't really have any size use the whole
assigned to them, they will be bounced somewhat early. Mass and size are
seperate, so this shouldn't cause problems. It's a bit kludgy, tho.
*/
- if(mode == line_mode || mode == spline_mode ||
- mode == spline_filled_mode || mode == polygon_mode)
+ if(st->mode == line_mode || st->mode == spline_mode ||
+ st->mode == spline_filled_mode || st->mode == polygon_mode)
{
- for(i = 1; i < npoints; i++)
+ for(i = 1; i < st->npoints; i++)
{
- balls[i].size = 0;
+ st->balls[i].size = 0;
}
}
- if (orbit_p)
+ if (st->orbit_p)
{
double a = 0;
double v;
- double v_mult = get_float_resource ("vMult", "Float");
+ double v_mult = get_float_resource (dpy, "vMult", "Float");
if (v_mult == 0.0) v_mult = 1.0;
- for (i = 1; i < npoints; i++)
+ for (i = 1; i < st->npoints; i++)
{
- double _2ipi_n = (2 * i * M_PI / npoints);
+ double _2ipi_n = (2 * i * M_PI / st->npoints);
double x = r * cos (_2ipi_n);
double y = r * sin (_2ipi_n);
double distx = r - x;
double dist2 = (distx * distx) + (y * y);
double dist = sqrt (dist2);
- double a1 = ((balls[i].mass / dist2) *
- ((dist < threshold) ? -1.0 : 1.0) *
+ double a1 = ((st->balls[i].mass / dist2) *
+ ((dist < st->threshold) ? -1.0 : 1.0) *
(distx / dist));
a += a1;
}
if (a < 0.0)
{
- fprintf (stderr, "%s: domain error: forces on balls too great\n",
+ /* "domain error: forces on balls too great" */
+ fprintf (stderr, "%s: window too small for these orbit settings.\n",
progname);
- exit (-1);
+ st->orbit_p = False;
+ goto RETRY_NO_ORBIT;
}
v = sqrt (a * r) * v_mult;
- for (i = 0; i < npoints; i++)
+ for (i = 0; i < st->npoints; i++)
{
- double k = ((2 * i * M_PI / npoints) + th);
- balls [i].vx = -v * sin (k);
- balls [i].vy = v * cos (k);
+ double k = ((2 * i * M_PI / st->npoints) + th);
+ st->balls [i].vx = -v * sin (k);
+ st->balls [i].vy = v * cos (k);
}
}
- if (mono_p) glow_p = False;
+ if (mono_p) st->glow_p = False;
XClearWindow (dpy, window);
+ return st;
}
static void
-compute_force (int i, double *dx_ret, double *dy_ret)
+compute_force (struct state *st, int i, double *dx_ret, double *dy_ret)
{
int j;
double x_dist, y_dist, dist, dist2;
*dx_ret = 0;
*dy_ret = 0;
- for (j = 0; j < npoints; j++)
+ for (j = 0; j < st->npoints; j++)
{
if (i == j) continue;
- x_dist = balls [j].x - balls [i].x;
- y_dist = balls [j].y - balls [i].y;
+ x_dist = st->balls [j].x - st->balls [i].x;
+ y_dist = st->balls [j].y - st->balls [i].y;
dist2 = (x_dist * x_dist) + (y_dist * y_dist);
dist = sqrt (dist2);
if (dist > 0.1) /* the balls are not overlapping */
{
- double new_acc = ((balls[j].mass / dist2) *
- ((dist < threshold) ? -1.0 : 1.0));
+ double new_acc = ((st->balls[j].mass / dist2) *
+ ((dist < st->threshold) ? -1.0 : 1.0));
double new_acc_dist = new_acc / dist;
*dx_ret += new_acc_dist * x_dist;
*dy_ret += new_acc_dist * y_dist;
}
}
- if (mouse_p)
+ if (st->mouse_p)
{
- x_dist = mouse_x - balls [i].x;
- y_dist = mouse_y - balls [i].y;
+ x_dist = st->mouse_x - st->balls [i].x;
+ y_dist = st->mouse_y - st->balls [i].y;
dist2 = (x_dist * x_dist) + (y_dist * y_dist);
dist = sqrt (dist2);
if (dist > 0.1) /* the balls are not overlapping */
{
- double new_acc = ((mouse_mass / dist2) *
- ((dist < threshold) ? -1.0 : 1.0));
+ double new_acc = ((st->mouse_mass / dist2) *
+ ((dist < st->threshold) ? -1.0 : 1.0));
double new_acc_dist = new_acc / dist;
*dx_ret += new_acc_dist * x_dist;
*dy_ret += new_acc_dist * y_dist;
/* Draws meters along the diagonal for the x velocity */
static void
-draw_meter_x(Display *dpy, Window window, GC draw_gc,
- struct ball *balls, int i, int alone)
+draw_meter_x(Display *dpy, Window window, struct state *st, int i, int alone)
{
XWindowAttributes xgwa;
int x1,x2,y,w1,w2,h;
XGetWindowAttributes (dpy, window, &xgwa);
/* set the width of the bars to use */
- if(xgwa.height < BAR_SIZE*npoints)
+ if(xgwa.height < BAR_SIZE*st->npoints)
{
- y = i*(xgwa.height/npoints);
- h = (xgwa.height/npoints) - 2;
+ y = i*(xgwa.height/st->npoints);
+ h = (xgwa.height/st->npoints) - 2;
}
else
{
if(y<1) y=i;
if(h<1) h=1;
- w1 = (int)(20*x_vels[i]);
- w2 = (int)(20*balls[i].vx);
- x_vels[i] = balls[i].vx;
+ w1 = (int)(20*st->x_vels[i]);
+ w2 = (int)(20*st->balls[i].vx);
+ st->x_vels[i] = st->balls[i].vx;
if (w1<0) {
w1=-w1;
w2=-w2;
x2=x2-w2;
}
- XDrawRectangle(dpy,window,erase_gc,x1+(h+2)/2,y,w1,h);
- XDrawRectangle(dpy,window,draw_gc,x2+(h+2)/2,y,w2,h);
+ XDrawRectangle(dpy,window,st->erase_gc,x1+(h+2)/2,y,w1,h);
+ XDrawRectangle(dpy,window,st->draw_gc,x2+(h+2)/2,y,w2,h);
}
/* Draws meters along the diagonal for the y velocity.
one function instead of two without making them completely unreadable?
*/
static void
-draw_meter_y (Display *dpy, Window window, GC draw_gc,
- struct ball *balls, int i, int alone)
+draw_meter_y (Display *dpy, Window window, struct state *st, int i, int alone)
{
XWindowAttributes xgwa;
int y1,y2,x,h1,h2,w;
XGetWindowAttributes (dpy, window, &xgwa);
- if(xgwa.height < BAR_SIZE*npoints){ /*needs to be height still */
- x = i*(xgwa.height/npoints);
- w = (xgwa.height/npoints) - 2;
+ if(xgwa.height < BAR_SIZE*st->npoints){ /*needs to be height still */
+ x = i*(xgwa.height/st->npoints);
+ w = (xgwa.height/st->npoints) - 2;
}
else{
x = BAR_SIZE*i;
if(x < 1) x = i;
if(w < 1) w = 1;
- h1 = (int)(20*y_vels[i]);
- h2 = (int)(20*balls[i].vy);
- y_vels[i] = balls[i].vy;
+ h1 = (int)(20*st->y_vels[i]);
+ h2 = (int)(20*st->balls[i].vy);
+ st->y_vels[i] = st->balls[i].vy;
if (h1<0) {
h1=-h1;
h2=-h2;
y2=y2-h2;
}
- XDrawRectangle(dpy,window,erase_gc,x,y1+(w+2)/2,w,h1);
- XDrawRectangle(dpy,window,draw_gc,x,y2+(w+2)/2,w,h2);
+ XDrawRectangle(dpy,window,st->erase_gc,x,y1+(w+2)/2,w,h1);
+ XDrawRectangle(dpy,window,st->draw_gc,x,y2+(w+2)/2,w,h2);
}
/* Draws meters of the total speed of the balls */
static void
-draw_meter_speed (Display *dpy, Window window, GC draw_gc,
- struct ball *balls, int i)
+draw_meter_speed (Display *dpy, Window window, struct state *st, int i)
{
XWindowAttributes xgwa;
int y,x1,x2,h,w1,w2;
XGetWindowAttributes (dpy, window, &xgwa);
- if(xgwa.height < BAR_SIZE*npoints)
+ if(xgwa.height < BAR_SIZE*st->npoints)
{
- y = i*(xgwa.height/npoints);
- h = (xgwa.height/npoints) - 2;
+ y = i*(xgwa.height/st->npoints);
+ h = (xgwa.height/st->npoints) - 2;
}
else{
y = BAR_SIZE*i;
if(y < 1) y = i;
if(h < 1) h = 1;
- w1 = (int)(5*speeds[i]);
- w2 = (int)(5*(balls[i].vy*balls[i].vy+balls[i].vx*balls[i].vx));
- speeds[i] = balls[i].vy*balls[i].vy+balls[i].vx*balls[i].vx;
+ w1 = (int)(5*st->speeds[i]);
+ w2 = (int)(5*(st->balls[i].vy*st->balls[i].vy+st->balls[i].vx*st->balls[i].vx));
+ st->speeds[i] = st->balls[i].vy*st->balls[i].vy+st->balls[i].vx*st->balls[i].vx;
- XDrawRectangle(dpy,window,erase_gc,x1,y,w1,h);
- XDrawRectangle(dpy,window,draw_gc, x2,y,w2,h);
+ XDrawRectangle(dpy,window,st->erase_gc,x1,y,w1,h);
+ XDrawRectangle(dpy,window,st->draw_gc, x2,y,w2,h);
}
-static void
-run_balls (Display *dpy, Window window, int total_ticks)
+static unsigned long
+attraction_draw (Display *dpy, Window window, void *closure)
{
- int last_point_stack_fp = point_stack_fp;
- static int tick = 500, xlim, ylim;
- static Colormap cmap;
+ struct state *st = (struct state *) closure;
+ int last_point_stack_fp = st->point_stack_fp;
Window root1, child1; /*flip mods for mouse interaction*/
unsigned int mask;
- int i, radius = global_size/2;
- if(global_size == 0)
+ int i, radius = st->global_size/2;
+
+ st->total_ticks++;
+
+ if(st->global_size == 0)
radius = (MAX_SIZE / 3);
- if(graph_mode != graph_none)
+ if(st->graph_mode != graph_none)
{
- if(graph_mode == graph_both)
+ if(st->graph_mode == graph_both)
{
- for(i = 0; i < npoints; i++)
+ for(i = 0; i < st->npoints; i++)
{
- draw_meter_x(dpy,window,draw_gc, balls, i, 0);
- draw_meter_y(dpy,window,draw_gc, balls, i, 0);
+ draw_meter_x(dpy, window, st, i, 0);
+ draw_meter_y(dpy, window, st, i, 0);
}
}
- else if(graph_mode == graph_x)
+ else if(st->graph_mode == graph_x)
{
- for(i = 0; i < npoints; i++)
+ for(i = 0; i < st->npoints; i++)
{
- draw_meter_x(dpy,window,draw_gc, balls, i, 1);
+ draw_meter_x(dpy, window, st, i, 1);
}
}
- else if(graph_mode == graph_y)
+ else if(st->graph_mode == graph_y)
{
- for(i = 0; i < npoints; i++)
+ for(i = 0; i < st->npoints; i++)
{
- draw_meter_y(dpy,window,draw_gc, balls, i, 1);
+ draw_meter_y(dpy, window, st, i, 1);
}
}
- else if(graph_mode == graph_speed)
+ else if(st->graph_mode == graph_speed)
{
- for(i = 0; i < npoints; i++)
+ for(i = 0; i < st->npoints; i++)
{
- draw_meter_speed(dpy,window,draw_gc, balls, i);
+ draw_meter_speed(dpy, window, st, i);
}
}
}
- if (mouse_p)
+ if (st->mouse_p)
{
XQueryPointer(dpy, window, &root1, &child1,
- &root_x, &root_y, &mouse_x, &mouse_y, &mask);
- }
-
- if (tick++ == 500)
- {
- XWindowAttributes xgwa;
- XGetWindowAttributes (dpy, window, &xgwa);
- tick = 0;
- xlim = xgwa.width;
- ylim = xgwa.height;
- cmap = xgwa.colormap;
+ &st->root_x, &st->root_y, &st->mouse_x, &st->mouse_y, &mask);
}
/* compute the force of attraction/repulsion among all balls */
- for (i = 0; i < npoints; i++)
- compute_force (i, &balls[i].dx, &balls[i].dy);
+ for (i = 0; i < st->npoints; i++)
+ compute_force (st, i, &st->balls[i].dx, &st->balls[i].dy);
/* move the balls according to the forces now in effect */
- for (i = 0; i < npoints; i++)
+ for (i = 0; i < st->npoints; i++)
{
- double old_x = balls[i].x;
- double old_y = balls[i].y;
+ double old_x = st->balls[i].x;
+ double old_y = st->balls[i].y;
double new_x, new_y;
- int size = balls[i].size;
- balls[i].vx += balls[i].dx;
- balls[i].vy += balls[i].dy;
+ int size = st->balls[i].size;
+ st->balls[i].vx += st->balls[i].dx;
+ st->balls[i].vy += st->balls[i].dy;
/* "don't let them get too fast: impose a terminal velocity
(actually, make the medium have friction)"
viscosity of .9 for balls going over the speed limit. Anyway,
this is now optional
*/
- if (balls[i].vx > 10 && maxspeed_p)
+ if (fabs(st->balls[i].vx) > 10 && st->maxspeed_p)
{
- balls[i].vx *= 0.9;
- balls[i].dx = 0;
+ st->balls[i].vx *= 0.9;
+ st->balls[i].dx = 0;
}
- else if (viscosity != 1)
+ if (st->viscosity != 1)
{
- balls[i].vx *= viscosity;
+ st->balls[i].vx *= st->viscosity;
}
- if (balls[i].vy > 10 && maxspeed_p)
+ if (fabs(st->balls[i].vy) > 10 && st->maxspeed_p)
{
- balls[i].vy *= 0.9;
- balls[i].dy = 0;
+ st->balls[i].vy *= 0.9;
+ st->balls[i].dy = 0;
}
- else if (viscosity != 1)
+ if (st->viscosity != 1)
{
- balls[i].vy *= viscosity;
+ st->balls[i].vy *= st->viscosity;
}
- balls[i].x += balls[i].vx;
- balls[i].y += balls[i].vy;
+ st->balls[i].x += st->balls[i].vx;
+ st->balls[i].y += st->balls[i].vy;
/* bounce off the walls if desired
note: a ball is actually its upper left corner */
- if(walls_p)
+ if(st->walls_p)
{
- if(cbounce_p) /* with correct bouncing */
+ if(st->cbounce_p) /* with correct bouncing */
{
/* so long as it's out of range, keep bouncing */
- while( (balls[i].x >= (xlim - balls[i].size)) ||
- (balls[i].y >= (ylim - balls[i].size)) ||
- (balls[i].x <= 0) ||
- (balls[i].y <= 0) )
+ while( (st->balls[i].x >= (st->xlim - st->balls[i].size)) ||
+ (st->balls[i].y >= (st->ylim - st->balls[i].size)) ||
+ (st->balls[i].x <= 0) ||
+ (st->balls[i].y <= 0) )
{
- if (balls[i].x >= (xlim - balls[i].size))
+ if (st->balls[i].x >= (st->xlim - st->balls[i].size))
{
- balls[i].x = (2*(xlim - balls[i].size) - balls[i].x);
- balls[i].vx = -balls[i].vx;
+ st->balls[i].x = (2*(st->xlim - st->balls[i].size) - st->balls[i].x);
+ st->balls[i].vx = -st->balls[i].vx;
}
- if (balls[i].y >= (ylim - balls[i].size))
+ if (st->balls[i].y >= (st->ylim - st->balls[i].size))
{
- balls[i].y = (2*(ylim - balls[i].size) - balls[i].y);
- balls[i].vy = -balls[i].vy;
+ st->balls[i].y = (2*(st->ylim - st->balls[i].size) - st->balls[i].y);
+ st->balls[i].vy = -st->balls[i].vy;
}
- if (balls[i].x <= 0)
+ if (st->balls[i].x <= 0)
{
- balls[i].x = -balls[i].x;
- balls[i].vx = -balls[i].vx;
+ st->balls[i].x = -st->balls[i].x;
+ st->balls[i].vx = -st->balls[i].vx;
}
- if (balls[i].y <= 0)
+ if (st->balls[i].y <= 0)
{
- balls[i].y = -balls[i].y;
- balls[i].vy = -balls[i].vy;
+ st->balls[i].y = -st->balls[i].y;
+ st->balls[i].vy = -st->balls[i].vy;
}
}
}
else /* with old bouncing */
{
- if (balls[i].x >= (xlim - balls[i].size))
+ if (st->balls[i].x >= (st->xlim - st->balls[i].size))
{
- balls[i].x = (xlim - balls[i].size - 1);
- if (balls[i].vx > 0) /* why is this check here? */
- balls[i].vx = -balls[i].vx;
+ st->balls[i].x = (st->xlim - st->balls[i].size - 1);
+ if (st->balls[i].vx > 0) /* why is this check here? */
+ st->balls[i].vx = -st->balls[i].vx;
}
- if (balls[i].y >= (ylim - balls[i].size))
+ if (st->balls[i].y >= (st->ylim - st->balls[i].size))
{
- balls[i].y = (ylim - balls[i].size - 1);
- if (balls[i].vy > 0)
- balls[i].vy = -balls[i].vy;
+ st->balls[i].y = (st->ylim - st->balls[i].size - 1);
+ if (st->balls[i].vy > 0)
+ st->balls[i].vy = -st->balls[i].vy;
}
- if (balls[i].x <= 0)
+ if (st->balls[i].x <= 0)
{
- balls[i].x = 0;
- if (balls[i].vx < 0)
- balls[i].vx = -balls[i].vx;
+ st->balls[i].x = 0;
+ if (st->balls[i].vx < 0)
+ st->balls[i].vx = -st->balls[i].vx;
}
- if (balls[i].y <= 0)
+ if (st->balls[i].y <= 0)
{
- balls[i].y = 0;
- if (balls[i].vy < 0)
- balls[i].vy = -balls[i].vy;
+ st->balls[i].y = 0;
+ if (st->balls[i].vy < 0)
+ st->balls[i].vy = -st->balls[i].vy;
}
}
}
- new_x = balls[i].x;
- new_y = balls[i].y;
+ new_x = st->balls[i].x;
+ new_y = st->balls[i].y;
if (!mono_p)
{
- if (mode == ball_mode)
+ if (st->mode == ball_mode)
{
- if (glow_p)
+ if (st->glow_p)
{
/* make color saturation be related to particle
acceleration. */
double limit = 0.5;
double s, fraction;
- double vx = balls [i].dx;
- double vy = balls [i].dy;
+ double vx = st->balls [i].dx;
+ double vy = st->balls [i].dy;
if (vx < 0) vx = -vx;
if (vy < 0) vy = -vy;
fraction = vx + vy;
if (fraction > limit) fraction = limit;
s = 1 - (fraction / limit);
- balls[i].pixel_index = (ncolors * s);
+ st->balls[i].pixel_index = (st->ncolors * s);
}
- XSetForeground (dpy, draw_gc,
- colors[balls[i].pixel_index].pixel);
+ XSetForeground (dpy, st->draw_gc,
+ st->colors[st->balls[i].pixel_index].pixel);
}
}
- if (mode == ball_mode)
+ if (st->mode == ball_mode)
{
- XFillArc (dpy, window, erase_gc, (int) old_x, (int) old_y,
+ XFillArc (dpy, window, st->erase_gc, (int) old_x, (int) old_y,
size, size, 0, 360*64);
- XFillArc (dpy, window, draw_gc, (int) new_x, (int) new_y,
+ XFillArc (dpy, window, st->draw_gc, (int) new_x, (int) new_y,
size, size, 0, 360*64);
}
else
{
- point_stack [point_stack_fp].x = new_x;
- point_stack [point_stack_fp].y = new_y;
- point_stack_fp++;
+ st->point_stack [st->point_stack_fp].x = new_x;
+ st->point_stack [st->point_stack_fp].y = new_y;
+ st->point_stack_fp++;
}
}
/* draw the lines or polygons after computing all points */
- if (mode != ball_mode)
+ if (st->mode != ball_mode)
{
- point_stack [point_stack_fp].x = balls [0].x; /* close the polygon */
- point_stack [point_stack_fp].y = balls [0].y;
- point_stack_fp++;
- if (point_stack_fp == point_stack_size)
- point_stack_fp = 0;
- else if (point_stack_fp > point_stack_size) /* better be aligned */
+ st->point_stack [st->point_stack_fp].x = st->balls [0].x; /* close the polygon */
+ st->point_stack [st->point_stack_fp].y = st->balls [0].y;
+ st->point_stack_fp++;
+ if (st->point_stack_fp == st->point_stack_size)
+ st->point_stack_fp = 0;
+ else if (st->point_stack_fp > st->point_stack_size) /* better be aligned */
abort ();
if (!mono_p)
{
- static int tick = 0;
- if (tick++ == color_shift)
+ if (st->color_tick++ == st->color_shift)
{
- tick = 0;
- fg_index = (fg_index + 1) % ncolors;
- XSetForeground (dpy, draw_gc, colors[fg_index].pixel);
+ st->color_tick = 0;
+ st->fg_index = (st->fg_index + 1) % st->ncolors;
+ XSetForeground (dpy, st->draw_gc, st->colors[st->fg_index].pixel);
}
}
}
- switch (mode)
+ switch (st->mode)
{
case ball_mode:
break;
case line_mode:
- if (segments > 0)
- XDrawLines (dpy, window, erase_gc, point_stack + point_stack_fp,
- npoints + 1, CoordModeOrigin);
- XDrawLines (dpy, window, draw_gc, point_stack + last_point_stack_fp,
- npoints + 1, CoordModeOrigin);
+ if (st->segments > 0)
+ XDrawLines (dpy, window, st->erase_gc, st->point_stack + st->point_stack_fp,
+ st->npoints + 1, CoordModeOrigin);
+ XDrawLines (dpy, window, st->draw_gc, st->point_stack + last_point_stack_fp,
+ st->npoints + 1, CoordModeOrigin);
break;
case polygon_mode:
- if (segments > 0)
- XFillPolygon (dpy, window, erase_gc, point_stack + point_stack_fp,
- npoints + 1, (npoints == 3 ? Convex : Complex),
+ if (st->segments > 0)
+ XFillPolygon (dpy, window, st->erase_gc, st->point_stack + st->point_stack_fp,
+ st->npoints + 1, (st->npoints == 3 ? Convex : Complex),
CoordModeOrigin);
- XFillPolygon (dpy, window, draw_gc, point_stack + last_point_stack_fp,
- npoints + 1, (npoints == 3 ? Convex : Complex),
+ XFillPolygon (dpy, window, st->draw_gc, st->point_stack + last_point_stack_fp,
+ st->npoints + 1, (st->npoints == 3 ? Convex : Complex),
CoordModeOrigin);
break;
case tail_mode:
{
- for (i = 0; i < npoints; i++)
+ for (i = 0; i < st->npoints; i++)
{
- int index = point_stack_fp + i;
- int next_index = (index + (npoints + 1)) % point_stack_size;
- if(no_erase_yet == 1)
+ int index = st->point_stack_fp + i;
+ int next_index = (index + (st->npoints + 1)) % st->point_stack_size;
+ if(st->no_erase_yet == 1)
{
- if(total_ticks >= segments)
+ if(st->total_ticks >= st->segments)
{
- no_erase_yet = 0;
- XDrawLine (dpy, window, erase_gc,
- point_stack [index].x + radius,
- point_stack [index].y + radius,
- point_stack [next_index].x + radius,
- point_stack [next_index].y + radius);
+ st->no_erase_yet = 0;
+ XDrawLine (dpy, window, st->erase_gc,
+ st->point_stack [index].x + radius,
+ st->point_stack [index].y + radius,
+ st->point_stack [next_index].x + radius,
+ st->point_stack [next_index].y + radius);
}
}
else
{
- XDrawLine (dpy, window, erase_gc,
- point_stack [index].x + radius,
- point_stack [index].y + radius,
- point_stack [next_index].x + radius,
- point_stack [next_index].y + radius);
+ XDrawLine (dpy, window, st->erase_gc,
+ st->point_stack [index].x + radius,
+ st->point_stack [index].y + radius,
+ st->point_stack [next_index].x + radius,
+ st->point_stack [next_index].y + radius);
}
index = last_point_stack_fp + i;
- next_index = (index - (npoints + 1)) % point_stack_size;
- if (next_index < 0) next_index += point_stack_size;
- if (point_stack [next_index].x == 0 &&
- point_stack [next_index].y == 0)
+ next_index = (index - (st->npoints + 1)) % st->point_stack_size;
+ if (next_index < 0) next_index += st->point_stack_size;
+ if (st->point_stack [next_index].x == 0 &&
+ st->point_stack [next_index].y == 0)
continue;
- XDrawLine (dpy, window, draw_gc,
- point_stack [index].x + radius,
- point_stack [index].y + radius,
- point_stack [next_index].x + radius,
- point_stack [next_index].y + radius);
+ XDrawLine (dpy, window, st->draw_gc,
+ st->point_stack [index].x + radius,
+ st->point_stack [index].y + radius,
+ st->point_stack [next_index].x + radius,
+ st->point_stack [next_index].y + radius);
}
}
break;
case spline_mode:
case spline_filled_mode:
{
- static spline *s = 0;
- if (! s) s = make_spline (npoints);
- if (segments > 0)
+ if (! st->spl) st->spl = make_spline (st->npoints);
+ if (st->segments > 0)
{
- for (i = 0; i < npoints; i++)
+ for (i = 0; i < st->npoints; i++)
{
- s->control_x [i] = point_stack [point_stack_fp + i].x;
- s->control_y [i] = point_stack [point_stack_fp + i].y;
+ st->spl->control_x [i] = st->point_stack [st->point_stack_fp + i].x;
+ st->spl->control_y [i] = st->point_stack [st->point_stack_fp + i].y;
}
- compute_closed_spline (s);
- if (mode == spline_filled_mode)
- XFillPolygon (dpy, window, erase_gc, s->points, s->n_points,
- (s->n_points == 3 ? Convex : Complex),
+ compute_closed_spline (st->spl);
+ if (st->mode == spline_filled_mode)
+ XFillPolygon (dpy, window, st->erase_gc, st->spl->points, st->spl->n_points,
+ (st->spl->n_points == 3 ? Convex : Complex),
CoordModeOrigin);
else
- XDrawLines (dpy, window, erase_gc, s->points, s->n_points,
+ XDrawLines (dpy, window, st->erase_gc, st->spl->points, st->spl->n_points,
CoordModeOrigin);
}
- for (i = 0; i < npoints; i++)
+ for (i = 0; i < st->npoints; i++)
{
- s->control_x [i] = point_stack [last_point_stack_fp + i].x;
- s->control_y [i] = point_stack [last_point_stack_fp + i].y;
+ st->spl->control_x [i] = st->point_stack [last_point_stack_fp + i].x;
+ st->spl->control_y [i] = st->point_stack [last_point_stack_fp + i].y;
}
- compute_closed_spline (s);
- if (mode == spline_filled_mode)
- XFillPolygon (dpy, window, draw_gc, s->points, s->n_points,
- (s->n_points == 3 ? Convex : Complex),
+ compute_closed_spline (st->spl);
+ if (st->mode == spline_filled_mode)
+ XFillPolygon (dpy, window, st->draw_gc, st->spl->points, st->spl->n_points,
+ (st->spl->n_points == 3 ? Convex : Complex),
CoordModeOrigin);
else
- XDrawLines (dpy, window, draw_gc, s->points, s->n_points,
+ XDrawLines (dpy, window, st->draw_gc, st->spl->points, st->spl->n_points,
CoordModeOrigin);
}
break;
abort ();
}
- XSync (dpy, False);
+ return st->delay;
}
-\f
-char *progclass = "Attraction";
+static void
+attraction_reshape (Display *dpy, Window window, void *closure,
+ unsigned int w, unsigned int h)
+{
+ struct state *st = (struct state *) closure;
+ st->xlim = w;
+ st->ylim = h;
+}
+
+static Bool
+attraction_event (Display *dpy, Window window, void *closure, XEvent *event)
+{
+ return False;
+}
-char *defaults [] = {
+static void
+attraction_free (Display *dpy, Window window, void *closure)
+{
+ struct state *st = (struct state *) closure;
+
+ if (st->balls) free (st->balls);
+ if (st->x_vels) free (st->x_vels);
+ if (st->y_vels) free (st->y_vels);
+ if (st->speeds) free (st->speeds);
+ if (st->point_stack) free (st->point_stack);
+ if (st->colors) free (st->colors);
+ if (st->spl) free_spline (st->spl);
+
+ free (st);
+}
+
+\f
+static const char *attraction_defaults [] = {
".background: black",
".foreground: white",
"*mode: balls",
"*points: 0",
"*size: 0",
"*colors: 200",
- "*threshold: 100",
+ "*threshold: 200",
"*delay: 10000",
"*glow: false",
"*mouseSize: 10",
"*colorShift: 3",
"*segments: 500",
"*vMult: 0.9",
+ "*radius: 0",
+ "*vx: 0",
+ "*vy: 0",
0
};
-XrmOptionDescRec options [] = {
+static XrmOptionDescRec attraction_options [] = {
{ "-mode", ".mode", XrmoptionSepArg, 0 },
{ "-graphmode", ".graphmode", XrmoptionSepArg, 0 },
{ "-colors", ".colors", XrmoptionSepArg, 0 },
{ 0, 0, 0, 0 }
};
-void
-screenhack (Display *dpy, Window window)
-{
- /* for tail mode fix */
- int total_ticks = 0;
- init_balls (dpy, window);
- while (1)
- {
- total_ticks++;
- run_balls (dpy, window, total_ticks);
- screenhack_handle_events (dpy);
- if (delay)
- usleep (delay);
- }
-}
+XSCREENSAVER_MODULE ("Attraction", attraction)
projects / xscreensaver / blobdiff