Tetrahedron

Tetrahedron, with hexagony as its inspiration, is a fungeoid created by user:cleverxia that operates on a finite tetrahedron.

Program flow

first, the program is loaded into "program tetrahedron" from top to bottom, up to down, left to write, truncated so that there aren't any all-null layers. for example,

123456789abcdefghijklmnopq

will result in this tetrahedron ($'s are nulls):

    1

   2 3
    4

  5 6 7
   8 9
    a

 b c d e
  f g h
   i j
    k

l m n o p
 q $ $ $
  $ $ $
   $ $
    $

IP starts at the top corner, heading down-west (DW).

 UN
UW UE

 NW NE
W IP  E
 SW SE

DW DE
 DS

when the IP/DP overflows at the DW direction it wraps to the top keeping the same direction. same for DE,DS,UN,UW,UE. when IP overflows at the E direction, it "warps and reflects to the other side" like this:

   $             Z
  3 6           9 5
 0 X 2         $ $ 6
$ 8 5 $       0 1 2 Y

where numbers represent the time that the IP comes there, X contains 1/4/7, Y contains 3/7, Z contains 4/8. essentially the same for W/NW/NE/SW/SE.

The data pointer starts at the top, heading down-west (again).

Before the program starts, all commands in the tetrahedron is changed into the corresponding opcode in numbers with null ($)=0. (Otherwise there are no way for you to manage the data) DP's value is the opcode of the cell pointed by the data pointer

Commands

division/modulo by zero results in 0

Caption text

command	opcode	meaning
	-1	APLWSI interpreter
0~9	0~9	also APLWSI interpreters, useful for initializing data
△▽○◇□☆▲▼●◆■★	-2~-13	go in the specified direction opcode direction -2 UN -3 UW -4 UE -5 NW -6 NE -7 W -8 E -9 SW -10 SE -11 DS -12 DW -13 DE
▷◁♤♡♢♧▶◀♠♥♦♣	-14~-25	set data pointer direction in the direction specified by the table above and opcode (x+12)
Δ	-26	set the IP's delta to the DP's value
δ	-27	set DP's delta to DP's value
@	10	halt
"	11	move the DP in its direction by delta
#	12	skip next instruction
$	13	swap current DP's value with register. (register starts at 0)
+-*/%∧∨⊕⊙	14~18 , 28~31	DP's value [command]= register (integer division, rounds towards zero)
>	19	right shift current cell by 1 bit
o	20	output DP value as ASCII
n	22	output DP value as number
i	21	input ASCII to DP value
j	23	input number to DP value
_	24	reflect
¤	25	load a schematic with ID equal to DP value
ʃ♭♯♮А-Яа-я❶❷❸❹❺❻❼❽❾❿º¹²³½¼¾⅓⅔₁₂₃∞†‡	32~126	schematic command, undefined commands interpret APLWSI (also can be used as initializers)
α β γ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ τ υ φ χ ψ ω Γ Θ Λ Ξ Π Σ Υ Φ Ψ Ω Þ Š Œ ¶ ™ ® © ¤ ʌ Ð Ç Æ	127 128 150 200 250 300 400 500 600 700 800 900 1000 1024 512 256 243 729 2187 6561 2048 4096 8192 16384 32768 65536 625 3125 15625 4294967296 264 123456789 1234567890 81985529216486900 3141592653589793 1000000000000000 2718281828459045 1414213562373095 1732050807568877 2236067977499789 1618033988749895 144 441 114514 1919810	moar initializers
!	26	logical not DP's value
b	27	branch: if DP's value is <=0, then turn left 60 degrees, otherwise turn right 60 degrees

Examples

Truth machine (hopefully)

00??0?????0?????????▲j0▼?●☆b?n◇▼□n@

? can be replaced with anything