/* virtual */ SysStatusUval
FileSystemK42RamFS::readlink(FileToken fileInfo, char *buf, uval bufsize)
{
FileInfoK42RamFSSymLink *syml = SINF(fileInfo);
if (!S_ISLNK(syml->status.st_mode)) {
return _SERROR(2660, 0, EINVAL);
}
char *path;
uval plen = syml->getPath(path);
if (plen > bufsize) {
plen = bufsize; // truncate
}
memcpy(buf, path, plen);
return _SRETUVAL(plen);
}
static Bool
initSintab(ModeInfo * mi)
{
fadeplotstruct *fp = &fadeplots[MI_SCREEN(mi)];
int i;
float x;
fp->angles = NRAND(950) + 250;
if ((fp->stab = (int *) malloc(fp->angles * sizeof (int))) == NULL) {
free_fadeplot(mi);
return False;
}
for (i = 0; i < fp->angles; i++) {
x = SINF(2.0 * M_PI * i / fp->angles);
fp->stab[i] = (int) (x * ABS(x) * fp->min) + fp->min;
}
return True;
}
static void
draw_dots(ModeInfo * mi, int in)
{
float i, inc;
float x, y;
spiralstruct *sp = &spirals[MI_SCREEN(mi)];
inc = TWOPI / (float) sp->dots;
for (i = 0.0; i < TWOPI; i += inc) {
x = sp->traildots[in].hx + COSF(i + sp->traildots[in].ha) *
sp->traildots[in].hr;
y = sp->traildots[in].hy + SINF(i + sp->traildots[in].ha) *
sp->traildots[in].hr;
XDrawPoint(MI_DISPLAY(mi), MI_WINDOW(mi), MI_GC(mi),
TFX(sp, x), TFY(sp, y));
}
}
ENTRYPOINT void
draw_braid(ModeInfo * mi)
{
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
int num_points = 500;
float t_inc;
float theta, psi;
float t, r_diff;
int i, s;
float x_1, y_1, x_2, y_2, r1, r2;
float color, color_use = 0.0, color_inc;
braidtype *braid;
if (braids == NULL)
return;
braid = &braids[MI_SCREEN(mi)];
#ifdef STANDALONE
if (braid->eraser) {
braid->eraser = erase_window (MI_DISPLAY(mi), MI_WINDOW(mi), braid->eraser);
return;
}
#endif
MI_IS_DRAWN(mi) = True;
XSetLineAttributes(display, MI_GC(mi), braid->linewidth,
LineSolid,
(braid->linewidth <= 3 ? CapButt : CapRound),
JoinMiter);
theta = (2.0 * M_PI) / (float) (braid->braidlength);
t_inc = (2.0 * M_PI) / (float) num_points;
color_inc = (float) MI_NPIXELS(mi) * braid->color_direction /
(float) num_points;
braid->startcolor += SPINRATE * color_inc;
if (((int) braid->startcolor) >= MI_NPIXELS(mi))
braid->startcolor = 0.0;
r_diff = (braid->max_radius - braid->min_radius) / (float) (braid->nstrands);
color = braid->startcolor;
psi = 0.0;
for (i = 0; i < braid->braidlength; i++) {
psi += theta;
for (t = 0.0; t < theta; t += t_inc) {
#ifdef COLORROUND
color += color_inc;
if (((int) color) >= MI_NPIXELS(mi))
color = 0.0;
color_use = color;
#endif
for (s = 0; s < braid->nstrands; s++) {
if (ABS(braid->braidword[i]) == s)
continue;
if (ABS(braid->braidword[i]) - 1 == s) {
/* crosSINFg */
#ifdef COLORCOMP
if (MI_NPIXELS(mi) > 2) {
color_use = color + SPINRATE *
braid->components[applywordbackto(braid, s, i)] +
(psi + t) / 2.0 / M_PI * (float) MI_NPIXELS(mi);
while (((int) color_use) >= MI_NPIXELS(mi))
color_use -= (float) MI_NPIXELS(mi);
while (((int) color_use) < 0)
color_use += (float) MI_NPIXELS(mi);
}
#endif
#ifdef COLORROUND
if (MI_NPIXELS(mi) > 2) {
color_use += SPINRATE * color_inc;
while (((int) color_use) >= MI_NPIXELS(mi))
color_use -= (float) MI_NPIXELS(mi);
}
#endif
r1 = braid->min_radius + r_diff * (float) (s);
r2 = braid->min_radius + r_diff * (float) (s + 1);
if (braid->braidword[i] > 0 ||
(FABSF(t - theta / 2.0) > theta / 7.0)) {
x_1 = ((0.5 * (1.0 + SINF(t / theta * M_PI - M_PI_2)) * r2 +
0.5 * (1.0 + SINF((theta - t) / theta * M_PI - M_PI_2)) * r1)) *
COSF(t + psi) + braid->center_x;
y_1 = ((0.5 * (1.0 + SINF(t / theta * M_PI - M_PI_2)) * r2 +
0.5 * (1.0 + SINF((theta - t) / theta * M_PI - M_PI_2)) * r1)) *
SINF(t + psi) + braid->center_y;
x_2 = ((0.5 * (1.0 + SINF((t + t_inc) / theta * M_PI - M_PI_2)) * r2 +
0.5 * (1.0 + SINF((theta - t - t_inc) / theta * M_PI - M_PI_2)) * r1)) *
COSF(t + t_inc + psi) + braid->center_x;
y_2 = ((0.5 * (1.0 + SINF((t + t_inc) / theta * M_PI - M_PI_2)) * r2 +
0.5 * (1.0 + SINF((theta - t - t_inc) / theta * M_PI - M_PI_2)) * r1)) *
SINF(t + t_inc + psi) + braid->center_y;
if (MI_NPIXELS(mi) > 2)
XSetForeground(display, MI_GC(mi), MI_PIXEL(mi, (int) color_use));
else
XSetForeground(display, MI_GC(mi), MI_WHITE_PIXEL(mi));
XDrawLine(display, window, MI_GC(mi),
(int) (x_1), (int) (y_1), (int) (x_2), (int) (y_2));
}
#ifdef COLORCOMP
if (MI_NPIXELS(mi) > 2) {
color_use = color + SPINRATE *
braid->components[applywordbackto(braid, s + 1, i)] +
(psi + t) / 2.0 / M_PI * (float) MI_NPIXELS(mi);
while (((int) color_use) >= MI_NPIXELS(mi))
color_use -= (float) MI_NPIXELS(mi);
while (((int) color_use) < 0)
color_use += (float) MI_NPIXELS(mi);
}
#endif
if (braid->braidword[i] < 0 ||
(FABSF(t - theta / 2.0) > theta / 7.0)) {
x_1 = ((0.5 * (1.0 + SINF(t / theta * M_PI - M_PI_2)) * r1 +
0.5 * (1.0 + SINF((theta - t) / theta * M_PI - M_PI_2)) * r2)) *
COSF(t + psi) + braid->center_x;
y_1 = ((0.5 * (1.0 + SINF(t / theta * M_PI - M_PI_2)) * r1 +
0.5 * (1.0 + SINF((theta - t) / theta * M_PI - M_PI_2)) * r2)) *
SINF(t + psi) + braid->center_y;
x_2 = ((0.5 * (1.0 + SINF((t + t_inc) / theta * M_PI - M_PI_2)) * r1 +
0.5 * (1.0 + SINF((theta - t - t_inc) / theta * M_PI - M_PI_2)) * r2)) *
COSF(t + t_inc + psi) + braid->center_x;
y_2 = ((0.5 * (1.0 + SINF((t + t_inc) / theta * M_PI - M_PI_2)) * r1 +
0.5 * (1.0 + SINF((theta - t - t_inc) / theta * M_PI - M_PI_2)) * r2)) *
SINF(t + t_inc + psi) + braid->center_y;
if (MI_NPIXELS(mi) > 2)
XSetForeground(display, MI_GC(mi), MI_PIXEL(mi, (int) color_use));
else
XSetForeground(display, MI_GC(mi), MI_WHITE_PIXEL(mi));
XDrawLine(display, window, MI_GC(mi),
(int) (x_1), (int) (y_1), (int) (x_2), (int) (y_2));
}
} else {
/* no crosSINFg */
#ifdef COLORCOMP
if (MI_NPIXELS(mi) > 2) {
color_use = color + SPINRATE *
braid->components[applywordbackto(braid, s, i)] +
(psi + t) / 2.0 / M_PI * (float) MI_NPIXELS(mi);
while (((int) color_use) >= MI_NPIXELS(mi))
color_use -= (float) MI_NPIXELS(mi);
while (((int) color_use) < 0)
color_use += (float) MI_NPIXELS(mi);
}
#endif
#ifdef COLORROUND
if (MI_NPIXELS(mi) > 2) {
color_use += SPINRATE * color_inc;
while (((int) color_use) >= MI_NPIXELS(mi))
color_use -= (float) MI_NPIXELS(mi);
}
#endif
r1 = braid->min_radius + r_diff * (float) (s);
x_1 = r1 * COSF(t + psi) + braid->center_x;
y_1 = r1 * SINF(t + psi) + braid->center_y;
x_2 = r1 * COSF(t + t_inc + psi) + braid->center_x;
y_2 = r1 * SINF(t + t_inc + psi) + braid->center_y;
if (MI_NPIXELS(mi) > 2)
XSetForeground(display, MI_GC(mi), MI_PIXEL(mi, (int) color_use));
else
XSetForeground(display, MI_GC(mi), MI_WHITE_PIXEL(mi));
XDrawLine(display, window, MI_GC(mi),
(int) (x_1), (int) (y_1), (int) (x_2), (int) (y_2));
}
}
}
}
XSetLineAttributes(display, MI_GC(mi), 1, LineSolid, CapNotLast, JoinRound);
if (++braid->age > MI_CYCLES(mi)) {
#ifdef STANDALONE
braid->eraser = erase_window (MI_DISPLAY(mi), MI_WINDOW(mi), braid->eraser);
#endif
init_braid(mi);
}
}
ENTRYPOINT void
draw_rotor (ModeInfo * mi)
{
Display *display = MI_DISPLAY(mi);
GC gc = MI_GC(mi);
register elem *pelem;
int thisx, thisy;
int i;
int x_1, y_1, x_2, y_2;
rotorstruct *rp;
if (rotors == NULL)
return;
rp = &rotors[MI_SCREEN(mi)];
if (rp->elements == NULL)
return;
MI_IS_DRAWN(mi) = True;
if (!rp->iconifiedscreen) {
thisx = rp->centerx;
thisy = rp->centery;
} else {
thisx = rp->prevcenterx;
thisy = rp->prevcentery;
}
XSetLineAttributes(MI_DISPLAY(mi), MI_GC(mi), rp->linewidth,
LineSolid, CapButt, JoinMiter);
for (i = rp->num, pelem = rp->elements; --i >= 0; pelem++) {
if (pelem->radius_drift_max <= pelem->radius_drift_now) {
pelem->start_radius = pelem->end_radius;
pelem->end_radius = (float) NRAND(40000) / 100.0 - 200.0;
pelem->radius_drift_max = (float) NRAND(100000) + 10000.0;
pelem->radius_drift_now = 0.0;
}
if (pelem->ratio_drift_max <= pelem->ratio_drift_now) {
pelem->start_ratio = pelem->end_ratio;
pelem->end_ratio = (float) NRAND(2000) / 100.0 - 10.0;
pelem->ratio_drift_max = (float) NRAND(100000) + 10000.0;
pelem->ratio_drift_now = 0.0;
}
pelem->ratio = pelem->start_ratio +
(pelem->end_ratio - pelem->start_ratio) /
pelem->ratio_drift_max * pelem->ratio_drift_now;
pelem->angle = rp->angle * pelem->ratio;
pelem->radius = pelem->start_radius +
(pelem->end_radius - pelem->start_radius) /
pelem->radius_drift_max * pelem->radius_drift_now;
thisx += (int) (COSF(pelem->angle) * pelem->radius);
thisy += (int) (SINF(pelem->angle) * pelem->radius);
pelem->ratio_drift_now += 1.0;
pelem->radius_drift_now += 1.0;
}
if (rp->firsttime)
rp->firsttime = False;
else {
XSetForeground(display, gc, MI_BLACK_PIXEL(mi));
x_1 = (int) rp->save[rp->rotor].x;
y_1 = (int) rp->save[rp->rotor].y;
x_2 = (int) rp->save[rp->prev].x;
y_2 = (int) rp->save[rp->prev].y;
if (rp->iconifiedscreen) {
x_1 = x_1 * rp->centerx / rp->prevcenterx;
x_2 = x_2 * rp->centerx / rp->prevcenterx;
y_1 = y_1 * rp->centery / rp->prevcentery;
y_2 = y_2 * rp->centery / rp->prevcentery;
}
XDrawLine(display, MI_WINDOW(mi), gc, x_1, y_1, x_2, y_2);
if (MI_NPIXELS(mi) > 2) {
XSetForeground(display, gc, MI_PIXEL(mi, rp->pix));
if (++rp->pix >= MI_NPIXELS(mi))
rp->pix = 0;
} else
XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
x_1 = rp->lastx;
y_1 = rp->lasty;
x_2 = thisx;
y_2 = thisy;
if (rp->iconifiedscreen) {
x_1 = x_1 * rp->centerx / rp->prevcenterx;
x_2 = x_2 * rp->centerx / rp->prevcenterx;
y_1 = y_1 * rp->centery / rp->prevcentery;
y_2 = y_2 * rp->centery / rp->prevcentery;
}
XDrawLine(display, MI_WINDOW(mi), gc, x_1, y_1, x_2, y_2);
}
rp->save[rp->rotor].x = rp->lastx = thisx;
rp->save[rp->rotor].y = rp->lasty = thisy;
++rp->rotor;
rp->rotor %= rp->nsave;
++rp->prev;
rp->prev %= rp->nsave;
if (rp->forward) {
rp->angle += 0.01;
if (rp->angle >= MAXANGLE) {
rp->angle = MAXANGLE;
rp->forward = False;
}
} else {
rp->angle -= 0.1;
if (rp->angle <= 0) {
rp->angle = 0.0;
rp->forward = True;
}
}
if (rp->redrawing) {
int j;
for (i = 0; i < REDRAWSTEP; i++) {
j = (rp->rotor - rp->redrawpos + rp->nsave) % rp->nsave;
x_1 = (int) rp->save[j].x;
y_1 = (int) rp->save[j].y;
x_2 = (int) rp->save[(j - 1 + rp->nsave) % rp->nsave].x;
y_2 = (int) rp->save[(j - 1 + rp->nsave) % rp->nsave].y;
if (rp->iconifiedscreen) {
x_1 = x_1 * rp->centerx / rp->prevcenterx;
x_2 = x_2 * rp->centerx / rp->prevcenterx;
y_1 = y_1 * rp->centery / rp->prevcentery;
y_2 = y_2 * rp->centery / rp->prevcentery;
}
XDrawLine(display, MI_WINDOW(mi), gc, x_1, y_1, x_2, y_2);
if (++(rp->redrawpos) >= rp->nsave) {
rp->redrawing = 0;
break;
}
}
}
XSetLineAttributes(MI_DISPLAY(mi), MI_GC(mi), 1,
LineSolid, CapButt, JoinMiter);
}
ENTRYPOINT void
draw_galaxy(ModeInfo * mi)
{
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
GC gc = MI_GC(mi);
unistruct *gp = &universes[MI_SCREEN(mi)];
double d, eps, cox, six, cor, sir; /* tmp */
int i, j, k; /* more tmp */
XPoint *dummy = NULL;
if (! dbufp)
XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
if(spin){
gp->rot_y += 0.01;
gp->rot_x += 0.004;
}
cox = COSF(gp->rot_y);
six = SINF(gp->rot_y);
cor = COSF(gp->rot_x);
sir = SINF(gp->rot_x);
eps = 1/(EPSILON * sqrt_EPSILON * DELTAT * DELTAT * QCONS);
for (i = 0; i < gp->ngalaxies; ++i) {
Galaxy *gt = &gp->galaxies[i];
for (j = 0; j < gp->galaxies[i].nstars; ++j) {
Star *st = >->stars[j];
XPoint *newp = >->newpoints[j];
double v0 = st->vel[0];
double v1 = st->vel[1];
double v2 = st->vel[2];
for (k = 0; k < gp->ngalaxies; ++k) {
Galaxy *gtk = &gp->galaxies[k];
double d0 = gtk->pos[0] - st->pos[0];
double d1 = gtk->pos[1] - st->pos[1];
double d2 = gtk->pos[2] - st->pos[2];
d = d0 * d0 + d1 * d1 + d2 * d2;
if (d > EPSILON)
d = gtk->mass / (d * sqrt(d)) * DELTAT * DELTAT * QCONS;
else
d = gtk->mass / (eps * sqrt(eps));
v0 += d0 * d;
v1 += d1 * d;
v2 += d2 * d;
}
st->vel[0] = v0;
st->vel[1] = v1;
st->vel[2] = v2;
st->pos[0] += v0;
st->pos[1] += v1;
st->pos[2] += v2;
newp->x = (short) (((cox * st->pos[0]) - (six * st->pos[2])) *
gp->scale) + gp->midx;
newp->y = (short) (((cor * st->pos[1]) - (sir * ((six * st->pos[0]) +
(cox * st->pos[2]))))
* gp->scale) + gp->midy;
}
for (k = i + 1; k < gp->ngalaxies; ++k) {
Galaxy *gtk = &gp->galaxies[k];
double d0 = gtk->pos[0] - gt->pos[0];
double d1 = gtk->pos[1] - gt->pos[1];
double d2 = gtk->pos[2] - gt->pos[2];
d = d0 * d0 + d1 * d1 + d2 * d2;
if (d > EPSILON)
d = 1 / (d * sqrt(d)) * DELTAT * QCONS;
else
d = 1 / (EPSILON * sqrt_EPSILON) * DELTAT * QCONS;
d0 *= d;
d1 *= d;
d2 *= d;
gt->vel[0] += d0 * gtk->mass;
gt->vel[1] += d1 * gtk->mass;
gt->vel[2] += d2 * gtk->mass;
gtk->vel[0] -= d0 * gt->mass;
gtk->vel[1] -= d1 * gt->mass;
gtk->vel[2] -= d2 * gt->mass;
}
gt->pos[0] += gt->vel[0] * DELTAT;
gt->pos[1] += gt->vel[1] * DELTAT;
gt->pos[2] += gt->vel[2] * DELTAT;
#if 1
// hacked and optimized by katahiromz
{
if (dbufp) {
int count = gt->nstars;
const XPoint *pt = gt->oldpoints;
while (count-- > 0) {
SetPixelV(display,
pt->x, pt->y,
0);
++pt;
}
}
XSetForeground(display, gc, MI_PIXEL(mi, gt->galcol));
{
int count = gt->nstars;
const XPoint *pt = gt->newpoints;
const unsigned long rgb = gc->foreground_rgb;
while (count-- > 0) {
SetPixelV(display,
pt->x, pt->y,
rgb);
++pt;
}
}
}
#else
if (dbufp) {
XSetForeground(display, gc, MI_WIN_BLACK_PIXEL(mi));
XDrawPoints(display, window, gc, gt->oldpoints, gt->nstars,
CoordModeOrigin);
}
XSetForeground(display, gc, MI_PIXEL(mi, COLORSTEP * gt->galcol));
XSetForeground(display, gc, MI_PIXEL(mi, gt->galcol));
XDrawPoints(display, window, gc, gt->newpoints, gt->nstars,
CoordModeOrigin);
#endif
dummy = gt->oldpoints;
gt->oldpoints = gt->newpoints;
gt->newpoints = dummy;
}
gp->step++;
if (gp->step > gp->f_hititerations * 4)
startover(mi);
}
static void
startover(ModeInfo * mi)
{
unistruct *gp = &universes[MI_SCREEN(mi)];
int i, j; /* more tmp */
double w1, w2; /* more tmp */
double d, v, w, h; /* yet more tmp */
gp->step = 0;
gp->rot_y = 0;
gp->rot_x = 0;
if (MI_BATCHCOUNT(mi) < -MINGALAXIES)
free_galaxies(gp);
gp->ngalaxies = MI_BATCHCOUNT(mi);
if (gp->ngalaxies < -MINGALAXIES)
gp->ngalaxies = NRAND(-gp->ngalaxies - MINGALAXIES + 1) + MINGALAXIES;
else if (gp->ngalaxies < MINGALAXIES)
gp->ngalaxies = MINGALAXIES;
if (gp->galaxies == NULL)
gp->galaxies = (Galaxy *) calloc(gp->ngalaxies, sizeof (Galaxy));
for (i = 0; i < gp->ngalaxies; ++i) {
Galaxy *gt = &gp->galaxies[i];
double sinw1, sinw2, cosw1, cosw2;
#if 1 // hacked by katahiromz
gt->galcol = NRAND(NCOLORS);
#else
gt->galcol = NRAND(COLORBASE - 2);
if (gt->galcol > 1)
gt->galcol += 2; /* Mult 8; 16..31 no green stars */
/* Galaxies still may have some green stars but are not all green. */
#endif
if (gt->stars != NULL) {
(void) free((void *) gt->stars);
gt->stars = NULL;
}
gt->nstars = (NRAND(MAX_STARS / 2)) + MAX_STARS / 2;
gt->stars = (Star *) malloc(gt->nstars * sizeof (Star));
gt->oldpoints = (XPoint *) malloc(gt->nstars * sizeof (XPoint));
gt->newpoints = (XPoint *) malloc(gt->nstars * sizeof (XPoint));
w1 = 2.0 * M_PI * FLOATRAND;
w2 = 2.0 * M_PI * FLOATRAND;
sinw1 = SINF(w1);
sinw2 = SINF(w2);
cosw1 = COSF(w1);
cosw2 = COSF(w2);
gp->mat[0][0] = cosw2;
gp->mat[0][1] = -sinw1 * sinw2;
gp->mat[0][2] = cosw1 * sinw2;
gp->mat[1][0] = 0.0;
gp->mat[1][1] = cosw1;
gp->mat[1][2] = sinw1;
gp->mat[2][0] = -sinw2;
gp->mat[2][1] = -sinw1 * cosw2;
gp->mat[2][2] = cosw1 * cosw2;
gt->vel[0] = FLOATRAND * 2.0 - 1.0;
gt->vel[1] = FLOATRAND * 2.0 - 1.0;
gt->vel[2] = FLOATRAND * 2.0 - 1.0;
gt->pos[0] = -gt->vel[0] * DELTAT * gp->f_hititerations + FLOATRAND -
0.5;
gt->pos[1] = -gt->vel[1] * DELTAT * gp->f_hititerations + FLOATRAND -
0.5;
gt->pos[2] = -gt->vel[2] * DELTAT * gp->f_hititerations + FLOATRAND -
0.5;
gt->mass = (int) (FLOATRAND * 1000.0) + 1;
gp->size = GALAXYRANGESIZE * FLOATRAND + GALAXYMINSIZE;
for (j = 0; j < gt->nstars; ++j) {
Star *st = >->stars[j];
XPoint *oldp = >->oldpoints[j];
XPoint *newp = >->newpoints[j];
double sinw, cosw;
w = 2.0 * M_PI * FLOATRAND;
sinw = SINF(w);
cosw = COSF(w);
d = FLOATRAND * gp->size;
h = FLOATRAND * exp(-2.0 * (d / gp->size)) / 5.0 * gp->size;
if (FLOATRAND < 0.5)
h = -h;
st->pos[0] = gp->mat[0][0] * d * cosw + gp->mat[1][0] * d * sinw +
gp->mat[2][0] * h + gt->pos[0];
st->pos[1] = gp->mat[0][1] * d * cosw + gp->mat[1][1] * d * sinw +
gp->mat[2][1] * h + gt->pos[1];
st->pos[2] = gp->mat[0][2] * d * cosw + gp->mat[1][2] * d * sinw +
gp->mat[2][2] * h + gt->pos[2];
v = sqrt(gt->mass * QCONS / sqrt(d * d + h * h));
st->vel[0] = -gp->mat[0][0] * v * sinw + gp->mat[1][0] * v * cosw +
gt->vel[0];
st->vel[1] = -gp->mat[0][1] * v * sinw + gp->mat[1][1] * v * cosw +
gt->vel[1];
st->vel[2] = -gp->mat[0][2] * v * sinw + gp->mat[1][2] * v * cosw +
gt->vel[2];
st->vel[0] *= DELTAT;
st->vel[1] *= DELTAT;
st->vel[2] *= DELTAT;
oldp->x = 0;
oldp->y = 0;
newp->x = 0;
newp->y = 0;
}
}
XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
#if 0
(void) printf("ngalaxies=%d, f_hititerations=%d\n", gp->ngalaxies,
gp->f_hititerations);
(void) printf("f_deltat=%g\n", DELTAT);
(void) printf("Screen: ");
#endif /*0 */
}
ENTRYPOINT void
init_worm (ModeInfo * mi)
{
wormstruct *wp;
int size = MI_SIZE(mi);
int i, j;
if (worms == NULL) {
if ((worms = (wormstruct *) calloc(MI_NUM_SCREENS(mi),
sizeof (wormstruct))) == NULL)
return;
}
wp = &worms[MI_SCREEN(mi)];
if (MI_NPIXELS(mi) <= 2 || MI_WIN_IS_USE3D(mi))
wp->nc = 2;
else
wp->nc = MI_NPIXELS(mi);
if (wp->nc > NUMCOLORS)
wp->nc = NUMCOLORS;
free_worms(wp);
wp->nw = MI_BATCHCOUNT(mi);
if (wp->nw < -MINWORMS)
wp->nw = NRAND(-wp->nw - MINWORMS + 1) + MINWORMS;
else if (wp->nw < MINWORMS)
wp->nw = MINWORMS;
if (!wp->worm)
wp->worm = (wormstuff *) malloc(wp->nw * sizeof (wormstuff));
if (!wp->size)
wp->size = (int *) malloc(NUMCOLORS * sizeof (int));
wp->maxsize = (REDRAWSTEP + 1) * wp->nw; /* / wp->nc + 1; */
if (!wp->rects)
wp->rects =
(XRectangle *) malloc(wp->maxsize * NUMCOLORS * sizeof (XRectangle));
if (!init_table) {
init_table = 1;
for (i = 0; i < SEGMENTS; i++) {
sintab[i] = SINF(i * 2.0 * M_PI / SEGMENTS);
costab[i] = COSF(i * 2.0 * M_PI / SEGMENTS);
}
}
wp->xsize = MI_WIN_WIDTH(mi);
wp->ysize = MI_WIN_HEIGHT(mi);
wp->zsize = MAXZ - MINZ + 1;
if (MI_NPIXELS(mi) > 2)
wp->chromo = NRAND(MI_NPIXELS(mi));
if (size < -MINSIZE)
wp->circsize = NRAND(-size - MINSIZE + 1) + MINSIZE;
else if (size < MINSIZE)
wp->circsize = MINSIZE;
else
wp->circsize = size;
for (i = 0; i < wp->nc; i++) {
for (j = 0; j < wp->maxsize; j++) {
wp->rects[i * wp->maxsize + j].width = wp->circsize;
wp->rects[i * wp->maxsize + j].height = wp->circsize;
}
}
(void) memset((char *) wp->size, 0, wp->nc * sizeof (int));
wp->wormlength = (int) sqrt(wp->xsize + wp->ysize) *
MI_CYCLES(mi) / 8; /* Fudge this to something reasonable */
for (i = 0; i < wp->nw; i++) {
wp->worm[i].circ = (XPoint *) malloc(wp->wormlength * sizeof (XPoint));
wp->worm[i].diffcirc = (int *) malloc(wp->wormlength * sizeof (int));
for (j = 0; j < wp->wormlength; j++) {
wp->worm[i].circ[j].x = wp->xsize / 2;
wp->worm[i].circ[j].y = wp->ysize / 2;
if (MI_WIN_IS_USE3D(mi))
wp->worm[i].diffcirc[j] = 0;
}
wp->worm[i].dir = NRAND(SEGMENTS);
wp->worm[i].dir2 = NRAND(SEGMENTS);
wp->worm[i].tail = 0;
wp->worm[i].x = wp->xsize / 2;
wp->worm[i].y = wp->ysize / 2;
wp->worm[i].z = SCREENZ - MINZ;
wp->worm[i].redrawing = 0;
}
if (MI_WIN_IS_INSTALL(mi) && MI_WIN_IS_USE3D(mi)) {
XSetForeground(MI_DISPLAY(mi), MI_GC(mi), MI_NONE_COLOR(mi));
XFillRectangle(MI_DISPLAY(mi), MI_WINDOW(mi), MI_GC(mi),
0, 0, wp->xsize, wp->ysize);
} else
XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
}
static Bool
startover(ModeInfo * mi)
{
unistruct *gp = &universes[MI_SCREEN(mi)];
int size = (int) MI_SIZE(mi);
int i, j; /* more tmp */
double w1, w2; /* more tmp */
double d, v, w, h; /* yet more tmp */
gp->step = 0;
if (MI_COUNT(mi) < -MINGALAXIES)
free_galaxies(gp);
gp->ngalaxies = MI_COUNT(mi);
if (gp->ngalaxies < -MINGALAXIES)
gp->ngalaxies = NRAND(-gp->ngalaxies - MINGALAXIES + 1) + MINGALAXIES;
else if (gp->ngalaxies < MINGALAXIES)
gp->ngalaxies = MINGALAXIES;
if (gp->galaxies == NULL)
if ((gp->galaxies = (Galaxy *) calloc(gp->ngalaxies,
sizeof (Galaxy))) == NULL) {
free_galaxy(MI_DISPLAY(mi), gp);
return False;
}
for (i = 0; i < gp->ngalaxies; ++i) {
Galaxy *gt = &gp->galaxies[i];
double sinw1, sinw2, cosw1, cosw2;
if (MI_NPIXELS(mi) >= COLORS)
do {
gt->galcol = NRAND(COLORBASE) * COLORS;
} while (gt->galcol + COLORBASE / 2 < GREEN + NOTGREEN &&
gt->galcol + COLORBASE / 2 > GREEN - NOTGREEN);
else
gt->galcol = 0;
/* Galaxies still may have some green stars but are not all green. */
if (gt->stars != NULL) {
free(gt->stars);
gt->stars = (Star *) NULL;
}
gt->nstars = (NRAND(MAX_STARS / 2)) + MAX_STARS / 2;
if ((gt->stars = (Star *) malloc(gt->nstars *
sizeof (Star))) == NULL) {
free_galaxy(MI_DISPLAY(mi), gp);
return False;
}
w1 = 2.0 * M_PI * FLOATRAND;
w2 = 2.0 * M_PI * FLOATRAND;
sinw1 = SINF(w1);
sinw2 = SINF(w2);
cosw1 = COSF(w1);
cosw2 = COSF(w2);
gp->mat[0][0] = cosw2;
gp->mat[0][1] = -sinw1 * sinw2;
gp->mat[0][2] = cosw1 * sinw2;
gp->mat[1][0] = 0.0;
gp->mat[1][1] = cosw1;
gp->mat[1][2] = sinw1;
gp->mat[2][0] = -sinw2;
gp->mat[2][1] = -sinw1 * cosw2;
gp->mat[2][2] = cosw1 * cosw2;
gt->vel[0] = FLOATRAND * 2.0 - 1.0;
gt->vel[1] = FLOATRAND * 2.0 - 1.0;
gt->vel[2] = FLOATRAND * 2.0 - 1.0;
gt->pos[0] = -gt->vel[0] * DELTAT *
gp->f_hititerations + FLOATRAND - 0.5;
gt->pos[1] = -gt->vel[1] * DELTAT *
gp->f_hititerations + FLOATRAND - 0.5;
gt->pos[2] = (-gt->vel[2] * DELTAT *
gp->f_hititerations + FLOATRAND - 0.5) + Z_OFFSET;
gt->mass = (int) (FLOATRAND * 1000.0) + 1;
gp->size = GALAXYRANGESIZE * FLOATRAND + GALAXYMINSIZE;
for (j = 0; j < gt->nstars; ++j) {
Star *st = >->stars[j];
double sinw, cosw;
w = 2.0 * M_PI * FLOATRAND;
sinw = SINF(w);
cosw = COSF(w);
d = FLOATRAND * gp->size;
h = FLOATRAND * exp(-2.0 * (d / gp->size)) / 5.0 * gp->size;
if (FLOATRAND < 0.5)
h = -h;
st->pos[0] = gp->mat[0][0] * d * cosw + gp->mat[1][0] * d * sinw +
gp->mat[2][0] * h + gt->pos[0];
st->pos[1] = gp->mat[0][1] * d * cosw + gp->mat[1][1] * d * sinw +
gp->mat[2][1] * h + gt->pos[1];
st->pos[2] = gp->mat[0][2] * d * cosw + gp->mat[1][2] * d * sinw +
gp->mat[2][2] * h + gt->pos[2];
v = sqrt(gt->mass * QCONS / sqrt(d * d + h * h));
st->vel[0] = -gp->mat[0][0] * v * sinw + gp->mat[1][0] * v * cosw +
gt->vel[0];
st->vel[1] = -gp->mat[0][1] * v * sinw + gp->mat[1][1] * v * cosw +
gt->vel[1];
st->vel[2] = -gp->mat[0][2] * v * sinw + gp->mat[1][2] * v * cosw +
gt->vel[2];
st->vel[0] *= DELTAT;
st->vel[1] *= DELTAT;
st->vel[2] *= DELTAT;
st->px = 0;
st->py = 0;
if (size < -MINSIZE)
st->size = NRAND(-size - MINSIZE + 1) + MINSIZE;
else if (size < MINSIZE)
st->size = MINSIZE;
else
st->size = size;
st->Z_size = st->size;
}
}
MI_CLEARWINDOW(mi);
#if 0
(void) printf("ngalaxies=%d, f_hititerations=%d\n",
gp->ngalaxies, gp->f_hititerations);
(void) printf("f_deltat=%g\n", DELTAT);
(void) printf("Screen: ");
(void) printf("%dx%d pixel (%d-%d, %d-%d)\n",
(gp->clip.right - gp->clip.left), (gp->clip.bottom - gp->clip.top),
gp->clip.left, gp->clip.right, gp->clip.top, gp->clip.bottom);
#endif
return True;
}