turtle3D for Grasshopper

A Python library implementing 3D graphics in a way that can be used within Grasshopper.

Installing

Download the turtle3D.py script and place it somewhere on your computer, in a folder by itself. Then open Rhino, go to Tools > PythonScript > Edit..., go to Tools > Options, and in the Files tab, under Module Search Paths, click the "Add to search path" button, and then find the folder you put turtle3D.py in.

Using

Add the following script to a Grasshopper Python node:

from turtle3D import *

home()
pendown()
forward(10)
right(45)
forward(12)
right(90 + 45)
tiltdown(30)
forward(20)
a = lines()

This will create a turtle automatically, provide it the given instructions, and output the lines it has drawn to the a output of the Python node.

Important: If you omit the call to home() at the start of the code, you will get a NullReferenceException when the Python node runs for a second time. I do not know why this happens, but I believe it has something to do with the fact that the implicitly-created turtle is persisted between runs of the Python node.

Multiple Turtles

If you wish to create turtles explicitly, or you wish to keep imported names to a minimum to avoid name collisions, this code will have the same effect as the above code:

from turtle3D import Turtle

turtle = Turtle()
turtle.pendown()
turtle.forward(10)
turtle.right(45)
turtle.forward(12)
turtle.right(90 + 45)
turtle.tiltdown(30)
turtle.forward(20)
a = turtle.lines()

Full Tutorial

I've also written a full tutorial for this library.

License

This library is released under the terms of the Anti-Capitalist Software License v1.4.