A Python library implementing 3D graphics in a way that can be used within Grasshopper.
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.
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.
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()
I've also written a full tutorial for this library.
This library is released under the terms of the Anti-Capitalist Software License v1.4.