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lca32.c
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1987-10-28
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/* (3,2) linear cellular automaton */
/* */
/* Reference: */
/* */
/* Kenneth E. Perry */
/* Abstract Mathematical Art */
/* BYTE */
/* December, 1986 */
/* pages 181-192 */
/* Copyright (C) 1987 */
/* Harold V. McIntosh */
/* Gerardo Cisneros S. */
/* G. Cisneros, 4.3.87 */
/* 10 April 1987 - Adapted for second neighbors [HVM] */
/* 25 April 1987 - Collection of sample rules [HVM] */
/* 26 April 1987 - Multiple menus [HVM] */
/* 28 April 1987 - version for XVI Feria de Puebla [HVM] */
/* 16 May 1987 - adapted for (3,2) [HVM] */
# include <bdos.h>
# define COLGRAF 4 /* graph resolution */
# define T80X25 3 /* text resolution */
# define WHCYMAG 1 /* color quad for normal screen */
# define AL 320 /* array length (screen width) */
# define DS 11 /* number of distinct sums */
# define DT 12 /* DS + 1 */
# define NX 20 /* number of sample rules */
char xrule[] =
"00012012000"
"00021021000"
"00100221120"
"00100222120"
"00102110120"
"01002110110"
"01002122012"
"01010122220"
"01022100222"
"02001101100"
"02010202120"
"02011120110"
"02121112202"
"10022201212"
"11021000021"
"20010020211"
"20101102010"
"20200011222"
"20210120222"
"21000221212"
;
char xx[4], rule[DT];
int arule[DS], arr1[AL], arr2[AL];
main()
{
int c, i, jj, n;
int more = 'r';
videopalette(WHCYMAG); /* white/cyan/magenta */
tuto();
while (!kbdst()) jj=rand(); /* wait for keypress */
c=kbdin(); /* ignore it */
jj=rand()%NX;
for (i=0; i<DS; i++) rule[i] = xrule[DS*jj+i]; /* random sample rule */
rule[DS]=0;
for (i=0; i<AL; i++) { /* random initial array */
if (i%4 == 0) c=rand();
arr1[i]=c%3; c/=3;};
videomode(T80X25);
videoscroll(3,0,4,71,0,3); /* menu on blue background */
videoscroll(16,0,21,71,0,3);
xmenu(jj+1); /* show initial rule */
while (more!='n') { /* execute multiple runs */
rmenu();
lmenu();
while (0<1) { /* set up one run */
c=kbdin();
if (c=='g') break; /* go draw graph */
if (c=='q') more='n'; /* quit for good */
if (more=='n') break;
switch (c) {
case 'r': /* edit rule */
xblnk();
edrule();
videocursor(0,3,0);
rmenu();
break;
case 'l': /* edit cell string */
xblnk();
edline();
videocursor(0,3,0);
lmenu();
break;
case '#': /* read stored rule */
xmenu(NX);
n=DS*((i=lim(1,numin(0),NX))-1);
xmenu(i);
for (i=0; i<DS; i++) rule[i] = xrule[n+i];
rmenu();
break;
case 'u':
xblnk();
for (i=0; i<AL; i++) arr1[i]=0;
arr1[AL/4]=1;
arr1[AL/2]=2;
arr1[(3*AL)/4]=1;
lmenu();
break;
case 'x': /* random rule */
xblnk();
for (i=0; i<DS; i++) {
if (i%4 == 0) c = rand();
rule[i] = '0'+(c%3);
c/=3;
};
rmenu();
break;
case 'y': /* random line */
xblnk();
for (i=0; i<AL; i++) {
if (i%4 == 0) c = rand();
arr1[i]=c%3;
c/=3;
};
lmenu();
break;
default: break;
};
};
if (more=='n') break;
do {
evolve(rule);
videocursor(0,0,0);
scrstr("More?");
videocursor(0,0,30);
scrstr("y/n/cr");
more=kbdin();
} while (more=='\015');
videomode(T80X25); /* reset the screen */
if (more=='n') break;
};
}
edrule() /* edit the rule */
{
char c;
int i;
videocursor(0,1,6); /* get the rule */
i=0;
while (i<DS) {
videoputc(rule[i],2);
videoputc('\010',1);
c = kbdin();
if (c == '\015') break;
switch (c) {
case '0': case '1': case '2': /* state */
rule[i++] = c;
videoputc(c,1);
break;
case ' ': /* space = advance */
videoputc(rule[i++],1);
break;
case '\010': /* backspace */
if (i==0) break;
videoputc(rule[i--],1);
videoputc(c,1);
videoputc(c,1);
break;
default: break;
};
};
}
edline() { /* edit the line */
char c;
int i, j, k, ii, jj;
videocursor(0,16,0);
scrstr("insert states using 0, 1, 2");
videocursor(0,17,0);
scrstr("move cursor with n(north), s(south), e(east), w(west), or");
videocursor(0,18,0);
scrstr("with keyboard arrows. Space, backspace move right and left.");
videocursor(0,19,0);
scrstr("( seeks left margin, < absolutely, { up one line, [ down one line");
videocursor(0,20,0);
scrstr(") seeks right margin, > absolutely, } up one line, ] down one line");
videocursor(0,21,0);
scrstr("carriage return exits");
jj=4;
ii=1;
while (0<1) {
ii=lim(1,ii,40);
jj=lim(1,jj,8);
j=jj-1;
i=ii-1;
videocursor(0,j+6,i);
c=kbdin();
if (c == '\015') {videoscroll(16,0,21,70,0,3); break;};
switch (c) {
case '0': case '1': case '2': /* enter state */
arr1[40*j+i] = c-'0';
ii++;
break;
case 's': case '\012': case '\320': jj++; break; /* down - next line */
case 'n': case '\013': case '\310': jj--; break; /* up - last line */
case 'e': case '\014': case '\315': case ' ': ii++; break; /* space = advance */
case 'w': case '\010': case '\313': ii--; break; /* backspace */
case '<': ii=1; jj=1; break; /* absolute left */
case '{': ii=1; jj--; break; /* left one row up */
case '(': ii=1; break; /* left this row */
case '[': ii=1; jj++; break; /* left next row */
case '>': ii=40; jj=40; break; /* absolute right */
case '}': ii=40; jj--; break; /* right one row up */
case ')': ii=40; break; /* right this row */
case ']': ii=40; jj++; break; /* right next row */
default: break;
};
videocursor(0,j+6,0);
for (k=0; k<40; k++) videoputc('0'+arr1[40*j+k],1);
};
}
evolve(rule) /* display a screen of evolution */
char *rule;
{
int i, j, sum, sum0, sum1, sum2, sum3;
videomode(COLGRAF); /* erase the screen */
videocursor(0,0,0); /* top text line */
scrstr("Rule: ");
scrstr(rule);
for (i=0; i<DS; i++) {arule[i] = rule[i]-'0';}
for (j=8; j<200; j++) videodot(j,AL-1,2);
for (j=8; j<200; j++) { /* evolve for 192 generations */
sum0 = arr1[AL-2] + arr1[AL-1] + arr1[0] + arr1[1] + arr1[2];
sum1 = arr1[AL-1] + arr1[0] + arr1[1] + arr1[2] + arr1[3];
arr2[0] = arule[sum0];
arr2[1] = arule[sum1];
for (i=2; i<AL-2; i++) {
sum = arr1[i-2] + arr1[i-1] + arr1[i] + arr1[i+1] + arr1[i+2];
arr2[i] = arule[sum];
};
sum2 = arr1[AL-3] + arr1[AL-2] + arr1[AL-1] + arr1[0] + arr1[1];
sum3 = arr1[AL-4] + arr1[AL-3] + arr1[AL-2] + arr1[AL-1] + arr1[0];
arr2[AL-1] = arule[sum2];
arr2[AL-2] = arule[sum3];
for (i=0; i<AL; i++) {videodot(j,i,arr1[i]); arr1[i] = arr2[i];};
if (kbdst()) {kbdin(); break;};
}
}
tuto() /* tutorial and Help screen */
{
videomode(T80X25);
videocursor(0,2,0);
scrstr("<Copyright (C) 1987 - H.V. McIntosh, G. Cisneros S.>");
videocursor(0,4,0);
scrstr(" ***** LIFE in One Dimension *****");
videocursor(0,6,0);
scrstr("hree States - Black(0), Cyan(1), Magenta(2).");
videocursor(0,8,0);
scrstr("Second neighbors - two on each side, five altogether.");
videocursor(0,10,0);
scrstr("Totalistic transition rule - random, edited, or stored.");
videocursor(0,12,0);
scrstr("Initial Cellular Array - random, edited, or patterned.");
videocursor(0,14,0);
scrstr("Some rules are fragile and require several tries before");
vide