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Learn to Draw in LindenMASM!

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Table of Contents

1. Introduction
   
2. Syntax
   
3. Commands
   
4. Examples
   

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Chapter 1: Introduction

LindenMASM is an esoteric programming language I designed for the purposes of drawing Lindenmayer systems. It uses an Assembly-like syntax, hence the name LindenMASM. The original reason I made the language was for a code-golf challenge, which was to create a LindenMASM interpreter in the fewest bytes possible. Since this was too similar to a challenge that had already been made, I scrapped the idea, but held on to the interpreter.

The interpreter was written in Python 3.4, and does all of the drawing using a Turtle object. You can download the interpreter here.

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Chapter 2: Syntax

There are only a few functional keywords in LindenMASM, 8 to be exact.

• STT - Begins every LindenMASM file.
  
• AXI $ - Sets the axiom (initial state) of the system.
  • $ is a series of commands/variables/constants, ranging from the built-ins plus any user-defined functions.
    
• DEG $ - Sets the degree of which all turns will follow, default is 90.
  
• MOV $ - Sets the move distance of which all position adjustments will follow, default is 10.
  
• INC $ - Sets the number of iterations the generation should go through, default is 0.
  
• SET $ # - Sets a constant $ to a specified command #.
  • $ should be a character that is not one of []+-.
    
  • # will either be a 0 or a 1, where a 0 corresponds to the constant being one that draws forward, and a 1 corresponds to the constant being one that moves fowards.
    
• RPL $ # - On every iteration, variable/constant $ will be replaced with the command/variable/constant string #.
  • $ should be a character that is not one of []+-. It does not need to be SET to be replaced.
    
  • # is a string of commands/variables/constants that $ should be replaced with.
    
• END - Ends every LindenMASM file.
  

Each keyword should be placed on a new line. Every file should start with STT and end with END.

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Chapter 3: Commands

There are only four built-in commands, however with these you can do a bunch of stuff!

• + - Rotates the pointer to the right DEG degrees.
  
• - - Rotates the pointer to the left DEG degrees.
  
• [ - Saves the pointer's coordinates and heading to a list.
  
• ] - Pops the last value of a list and sets the pointer's coordinates and heading to that.
  

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Chapter 4: Examples

Dragon Curve, n = 12

Code:

STT INC 12 AXI FX SET F 0 RPL X X+YF+ RPL Y -FX-Y END

This will draw something like this:



Fractal Tree, n = 6

Code:

STT AXI X DEG 25 MOV 2 INC 6 SET F 0 RPL X F-[[X]+X]+F[+FX]-X RPL F FF END

This will draw something like this:

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Thanks for reading! The language isn't expansive or anything, but it's fun to play around with!