void
spacewarp(int w)
{
struct point p;
int j;
const char *str;
snrand(&you);
p.col = COLS / 2 - 8;
p.line = LINES / 2 - 1;
if (p.col < 0)
p.col = 0;
if (p.line < 0)
p.line = 0;
if (w) {
str = "BONUS!!!";
loot = loot - penalty;
penalty = 0;
} else {
str = "SPACE WARP!!!";
penalty += loot / PENALTY;
}
for (j = 0; j < 3; j++) {
erase();
refresh();
delay(5);
mvaddstr(p.line + 1, p.col + 1, str);
refresh();
delay(10);
}
setup();
winnings(cashvalue);
}
double testdeviation(int seed, double sd) {
int i;
double A, Q, rn;
double calcsd, deviation;
A = 0;
Q = 0;
snrand(seed);
for (i = 0; i < N; ++i) {
rn = nrandsd(sd);
if (i) {
Q = Q + (i * sqr(rn - A)) / (i+1);
A = A + (rn - A)/(i+1);
} else {
A = rn;
Q = 0;
}
}
calcsd = sqrt(Q / N);
deviation = fabs(1 - (calcsd / sd));
printf("[%s] - Calculated deviation %f is %2.2f%% from given deviation %f.\n", (deviation < MAXDEV)?" OK ":"FAIL", calcsd, deviation*100, sd);
return rn;
}
/* Main command loop */
void
mainloop(void)
{
int k;
int c, lastc = 0;
int repeat = 1;
for (;;) {
if (wantstop) {
endwin();
length(moves);
exit(0);
}
/* Highlight you, not left & above */
move(you.line + 1, you.col + 1);
refresh();
if (((c = getch()) <= '9') && (c >= '0')) {
repeat = c - '0';
while (((c = getch()) <= '9') && (c >= '0'))
repeat = 10 * repeat + (c - '0');
} else {
if (c != '.')
repeat = 1;
}
if (c == '.')
c = lastc;
if (!fast)
flushinp();
lastc = c;
switch (c) {
case CTRL('z'):
suspend();
continue;
case '\044':
case 'x':
case 0177: /* del or end of file */
case ERR:
endwin();
length(moves);
#ifdef LOGGING
logit("quit");
#endif
exit(0);
case CTRL('l'):
setup();
winnings(cashvalue);
continue;
case 'p':
case 'd':
snap();
continue;
case 'w':
spacewarp(0);
continue;
case 'A':
repeat = you.col;
c = 'h';
break;
case 'H':
case 'S':
repeat = you.col - money.col;
c = 'h';
break;
case 'T':
repeat = you.line;
c = 'k';
break;
case 'K':
case 'E':
repeat = you.line - money.line;
c = 'k';
break;
case 'P':
repeat = ccnt - 1 - you.col;
c = 'l';
break;
case 'L':
case 'F':
repeat = money.col - you.col;
c = 'l';
break;
case 'B':
repeat = lcnt - 1 - you.line;
c = 'j';
break;
case 'J':
case 'C':
repeat = money.line - you.line;
c = 'j';
break;
}
for (k = 1; k <= repeat; k++) {
moves++;
switch (c) {
case 's':
case 'h':
#ifdef KEY_LEFT
case KEY_LEFT:
#endif
case '\b':
if (you.col > 0) {
if ((fast) || (k == 1))
pchar(&you, ' ');
you.col--;
if ((fast) || (k == repeat) ||
(you.col == 0))
pchar(&you, ME);
}
break;
case 'f':
case 'l':
#ifdef KEY_RIGHT
case KEY_RIGHT:
#endif
case ' ':
if (you.col < ccnt - 1) {
if ((fast) || (k == 1))
pchar(&you, ' ');
you.col++;
if ((fast) || (k == repeat) ||
(you.col == ccnt - 1))
pchar(&you, ME);
}
break;
case CTRL('p'):
case 'e':
case 'k':
#ifdef KEY_UP
case KEY_UP:
#endif
case 'i':
if (you.line > 0) {
if ((fast) || (k == 1))
pchar(&you, ' ');
you.line--;
if ((fast) || (k == repeat) ||
(you.line == 0))
pchar(&you, ME);
}
break;
case CTRL('n'):
case 'c':
case 'j':
#ifdef KEY_DOWN
case KEY_DOWN:
#endif
case '\n':
case '\r':
case 'm':
if (you.line + 1 < lcnt) {
if ((fast) || (k == 1))
pchar(&you, ' ');
you.line++;
if ((fast) || (k == repeat) ||
(you.line == lcnt - 1))
pchar(&you, ME);
}
break;
}
if (same(&you, &money)) {
loot += 25;
if (k < repeat)
pchar(&you, ' ');
do {
snrand(&money);
} while ((money.col == finish.col &&
money.line == finish.line) ||
(money.col < 5 && money.line == 0) ||
(money.col == you.col &&
money.line == you.line));
pchar(&money, TREASURE);
winnings(cashvalue);
/* continue; Previously, snake missed a turn! */
}
if (same(&you, &finish)) {
win(&finish);
flushinp();
endwin();
printf("You have won with $%d.\n", cashvalue);
fflush(stdout);
#ifdef LOGGING
logit("won");
#endif
length(moves);
post(cashvalue, 1);
close(rawscores);
exit(0);
}
if (pushsnake())
break;
}
}
}
int
main(int argc, char *argv[])
{
struct sigaction sa;
int ch, i;
if (pledge("stdio rpath wpath cpath tty", NULL) == -1)
err(1, "pledge");
#ifdef LOGGING
const char *home;
home = getenv("HOME");
if (home == NULL || *home == '\0')
err(1, "getenv");
snprintf(logpath, sizeof(logpath), "%s/%s", home, ".snake.log");
logfile = fopen(logpath, "a");
#endif
while ((ch = getopt(argc, argv, "hl:stw:")) != -1)
switch ((char)ch) {
case 'w': /* width */
ccnt = strtonum(optarg, 1, INT_MAX, NULL);
break;
case 'l': /* length */
lcnt = strtonum(optarg, 1, INT_MAX, NULL);
break;
case 's': /* score */
if (readscores(0))
snscore(0);
else
printf("no scores so far\n");
return 0;
break;
case 't': /* slow terminal */
fast = 0;
break;
case 'h':
default:
fprintf(stderr, "usage: %s [-st] [-l length] "
"[-w width]\n", getprogname());
return 1;
}
readscores(1);
penalty = loot = 0;
initscr();
#ifdef KEY_LEFT
keypad(stdscr, TRUE);
#endif
nonl();
cbreak();
noecho();
if (!lcnt || lcnt > LINES - 2)
lcnt = LINES - 2;
if (!ccnt || ccnt > COLS - 3)
ccnt = COLS - 3;
i = lcnt < ccnt ? lcnt : ccnt;
if (i < 4) {
endwin();
errx(1, "screen too small for a fair game.");
}
/*
* chunk is the amount of money the user gets for each $.
* The formula below tries to be fair for various screen sizes.
* We only pay attention to the smaller of the 2 edges, since
* that seems to be the bottleneck.
* This formula is a hyperbola which includes the following points:
* (24, $25) (original scoring algorithm)
* (12, $40) (experimentally derived by the "feel")
* (48, $15) (a guess)
* This will give a 4x4 screen $99/shot. We don't allow anything
* smaller than 4x4 because there is a 3x3 game where you can win
* an infinite amount of money.
*/
if (i < 12)
i = 12; /* otherwise it isn't fair */
/*
* Compensate for border. This really changes the game since
* the screen is two squares smaller but we want the default
* to be $25, and the high scores on small screens were a bit
* much anyway.
*/
i += 2;
chunk = (675.0 / (i + 6)) + 2.5; /* min screen edge */
memset(&sa, 0, sizeof sa);
sigemptyset(&sa.sa_mask);
sa.sa_handler = stop;
sigaction(SIGINT, &sa, NULL);
snrand(&finish);
snrand(&you);
snrand(&money);
snrand(&snake[0]);
for (i = 1; i < 6; i++)
chase(&snake[i], &snake[i - 1]);
setup();
mainloop();
return 0;
}
