# Spirograph, genereting curves,how?

raw_ideas.dyn (7.3 KB) Hello Dynos,

I would like to create curves like a “Mauer rose”

Is there anaything like “turtle” in dynamo ? I can`t import any pen.
I ve seen i can use via designScript points, curves and they are driven by math.

In this Code, what have to be adapted to designScript:

import turtle \There is no turtle library, what can use instead?
from math import cos,sin
from time import sleep

window = turtle.Screen() \replaced by backgroundview in Dynamo
window.bgcolor("#FFFFFF")

myPen = turtle.Turtle()
myPen.hideturtle()
myPen.tracer(0)
myPen.speed(0)
myPen.pensize(3)
myPen.color("#AA00AA")

myPen.penup()

A = 100
B = 100
a = 3
b = 4
delta = 3.14/2
t=0

for i in range(0,1000): \that should work also in dynamo

• t+=0.01*
• #Apply Lissajous Parametric Equations*
• x = A * sin(a*t + delta) *
• y = B * sin(bt)
``````**myPen.goto(x,y)**
``````

** myPen.pendown()**
** myPen.getscreen().update()**

sleep(0.5) \there is no sleep in Python - is it like “break”? The for loop should work

Maybe someone has some info about that, I just found a spiral example, but nothing more

KR

Andreas

1 Like

an idea maybe

Zach Kron, post 27

Why stop at only one?

2 Likes

@Draxl_Andreas Created this Hypotrochoid using equations from here Hypotrochoid.dyn (8.7 KB)

``````//Hypotrochoid
R = 5;
r = 3;
d = 5;
a = 0..n..1;
x = (R-r)*Math.Cos(a)+d*Math.Cos(((R-r)/r)*a);
y = (R-r)*Math.Sin(a)-d*Math.Sin(((R-r)/r)*a);
p1 = Point.ByCoordinates(x,y);

//Graphics for animation
p2 = (Point.Origin().Translate(Vector.XAxis(),R-r))
.Rotate(Point.Origin(),Vector.ZAxis(),a);
l1 = Line.ByStartPointEndPoint(p1,p2);