3D
From Esolang
3D is a 3 dimensional esoteric programming language inspired by Befunge. It was created by User:Stop h time on 25 march 2008 and finished 31 march 2008.
Contents |
[edit] Commands
- LEFT, start moving to the left
- RIGHT, start moving to the right
- UP, start moving up
- DOWN, start moving down
- NEXT, start moving forewards through the 3rd dimension
- PREV, start moving backwards through the 3rd dimension
- JUMP, jump over an instruction
- DBLJMP, jump over 2 instructions
- INT, this one has 3 different usages: set integer variable, use integer variable, convert a string to an integer (next command must be an integer, INT, a string or STR, the first two for the first usages, the latter two for the third one)
- STR, 2 different usages: set a string variable, or use a string variable (next command must be an integer or INT to let the interprenter know which string)
- IFEQU, Jump if INT0 != INT1
- STREQU, Jump if STR0 != STR1
- IFLAR, Jump if INT0 <= INT1
- IFRND, jump random (50% chance of JUMP)
- RNDDIR, random direction (including back!)
- END, end program
- SWAP, swap 2 variables (example: SWAP INT 3 4, to swap INT3 and INT4 or: SWAP INT INT 0 1, to swap the integer no INT0 and INT1)
- YNPRMT, prompt Yes/No (label text: STR0) (if user chooses No, JUMP)
- SPRMT, prompt string (label text: STR0, default value/store var: STR1)
- OUTPUT, output variable (example: OUTPUT STR 1 or: OUTPUT INT 1)
- ADD, add something to an int (example: ADD 2 INT 3 would translate as INT2 += INT3, ADD 1 3 would be INT1 += 3). Useful as logical OR.
- SUB, subtract something from the previous defined int, usage similar to ADD. Useful as logical XOR.
- MUL, multiply, see above. Useful as logical AND.
- DIV, integer division, usage: see above.
- NOT, Usage: NOT 3. If INT3 would be 0, it is changed to 1, else it is changed to 0.
- empty: do nothing
- "abc, string constant
- 123, integer constant
[edit] Implementation
User:Stop h time has written an interpreter and two simple editors in Python. (Scripts available for download at http://www.mediafire.com/?sharekey=27b11e61e345fad17069484bded33bcd20cda4445bd3f7cf)
[edit] Turing-complete
The author believes 3D is Turing-complete, but isn't quite sure. He thinks the following program may prove it:
RIGHT ADD 0 1 INT DOWN UP 16 0 INT LEFT
It's an infinite loop, every time adding 1 to INT0, and setting INT(INT0) to 16. So this would set INT1 to 16, INT2 to 16, INT3 to 16, until infinity.
[edit] Examples
The following examples are all valid 3D programs (laid out on 2 dimensions, due to technical limitations):
OUTPUT "Hello world END prints "Hello World" on screen
DOWN The program used by the author for testing his interprenter. INT It writes the numbers 1-10 on screen and exits. 0 (Note the suspended addition) 10 RIGHT ADD 1 IFLAR DOWN END UP 1 INT OUTPUT 1 LEFT
3D is especially fit for creating 'marble-machines':
OUTPUT IFRND DOWN DOWN DOWN LEFT IFRND IFRND RIGHT IFRND DOWN DOWN RIGHT DOWN 0 1 2 4 5 6 7 END END END END END END END
