litigiosus

Simple grid-map system for building paths

1 2 3 5 7 11

13 17 19 23 29 31 37 41 47

141 cross

┣   ┳   ┻   ┫   ┛   ┏  ┗  ┓  ╋
118 124 100 110 69 101 77 93 141
alternitively:
TRB 1,5,7
RBL 3,5,7
LTR 1,3,5
BLT 1,3,7
TB  1,7
LR  3,5
LT  1,3
RB  5,7
TR  1,5
BL  3,7
TRBL  1,3,5,7
L     3
B     7
R     5
T     1

[1,5,7],[3,5,7],[1,3,5],[1,3,7], [1,3],[1,5],[3,7],[5,7], [1,7],[3,5], [1,3,5,7]

How to generate a random path?

Each random path (RP) has a center. There are 2*2*2*2 options for a RP where each side is either one of {T,L,R,B} or {E}.

Cntr= [0,0,0,0,1,0,0,0,0] //C 4

Top = [0,1,0,0,0,0,0,0,0] //T 1 Left =[0,0,0,1,0,0,0,0,0] //L 3 Right=[0,0,0,0,0,1,0,0,0] //R 5 Bot = [0,0,0,0,0,0,0,1,0] //B 7 Empty=[0,0,0,0,0,0,0,0,0] //E

function nextRandomValue() {
  return (new Date().getTime() % 10000) / 10000;
}

Pre-create the "demo copies" of the possible paths. Then, make hard copies.