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-
- /* (3,3) 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] */
- /* 23 May 1987 - adapted for (3,3) [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 15 /* number of distinct sums */
- # define NX 10 /* number of sample rules */
-
- char xrule[] =
-
- "000011201210000" /* holdover */
- "000101220120021" /* class iv */
- "010000212211100" /* blue dots */
- "010020002111002" /* two worlds */
- "020000212211100" /* red dots */
-
- "020101220001001" /* class iv-ish */
- "102111211202020" /* reds on blue */
- "110120002222112" /* strange blotches */
- "210201000201020" /* dots on bars */
- "211220020020222" /* two bgnds */
-
- ;
-
- char xx[4], rule[DS+1];
- 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;
-
- 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 */
- arr2[0]=arule[arr1[AL-3]+arr1[AL-2]+arr1[AL-1]+arr1[0]+arr1[1]+arr1[2]+arr1[3]];
- arr2[1]=arule[arr1[AL-2]+arr1[AL-1]+arr1[0]+arr1[1]+arr1[2]+arr1[3]+arr1[4]];
- arr2[2]=arule[arr1[AL-1]+arr1[0]+arr1[1]+arr1[2]+arr1[3]+arr1[4]+arr1[5]];
- for (i=3; i<AL-3; i++) arr2[i]=arule[arr1[i-3]+arr1[i-2]+arr1[i-1]+arr1[i]+arr1[i+1]+arr1[i+2]+arr1[i+3]];
- arr2[AL-3]=arule[arr1[AL-6]+arr1[AL-5]+arr1[AL-4]+arr1[AL-3]+arr1[AL-2]+arr1[AL-1]+arr1[0]];
- arr2[AL-2]=arule[arr1[AL-5]+arr1[AL-4]+arr1[AL-3]+arr1[AL-2]+arr1[AL-1]+arr1[0]+arr1[1]];
- arr2[AL-1]=arule[arr1[AL-4]+arr1[AL-3]+arr1[AL-2]+arr1[AL-1]+arr1[0]+arr1[1]+arr1[2]];
- 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("Three States - Black(0), Cyan(1), Magenta(2).");
- videocursor(0,8,0);
- scrstr("Third neighbors - three on each side, seven 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");
- videocursor(0,15,0);
- scrstr("manifesting an interesting evolutionary pattern.");
- videocursor(0,17,0);
- scrstr("Use any key to terminate a display in progress.");
- videocursor(0,21,0);
- scrstr("now, press any key to continue ...");
- }
-
- rmenu() { /* rule menu */
- videocursor(0,0,0);
- scrstr(" 0......1......2");
- videocursor(0,1,0);
- scrstr("Rule: "); scrstr(rule);
- videocursor(0,3,0);
- scrstr(" r(rule), l(line), #nn(stored rule), g(graph), q(quit)");
- videocursor(0,4,0);
- scrstr(" x(random rule), y(random line), u(unit line).");
- videocursor(0,3,0);
- }
-
- lmenu() { /* line menu */
- int i, j;
- for (j=0; 40*j<AL; j++) {
- videocursor(0,6+j,0);
- for (i=0; i<40; i++) videoputc('0'+arr1[40*j+i],1);
- }
- videocursor(0,3,0);
- }
-
- xmenu(n) int n; /* display rule number */
- {int i, nn;
- nn=sprintf(xx,"%3d",n);
- videocursor(0,1,30);
- for (i=0; i<nn; i++) videoputc(xx[i],1);
- videocursor(0,1,30);
- }
-
- xblnk() { /* clear rule number */
- videocursor(0,1,30);
- scrstr(" ");
- videocursor(0,3,0);
- }
-
- int lim(i,j,k)
- int i, j, k; /* limit j to interval (i,k) */
- {if (i>=j) return i; if (k<=j) return k; return j;}
-
- scrstr(s) /* write a string in graphics mode */
- char *s;
- { for (; *s != '\0'; s++) videoputc(*s,1); }
-
- int kbdst() /* keyboard status */
- {return(bdos(11) & 0xFF);}
-
- kbdin() { /* direct keyboard input, no echo */
- int c;
- if ((c = bdos(7) & 0xFF) == '\0') c = (bdos(7) & 0xFF) | 0x80;
- return(c);
- }
-
- int numin(n) /* read number from keyboard */
- int n; {char c;
- c=kbdin();
- if (c>='0'&&c<='9') return(numin(10*n+(c-'0'))); else return(n);
- }
-
- /* end */