DISCLAIMER: This blog post was written by a human with the help of AI
Introduction
Spirographs are captivating geometric designs created by rolling a circle inside or outside another circle. These mesmerizing patterns have fascinated artists, mathematicians, and enthusiasts alike for centuries. With the power of Python and the spyrograph library, we can create complex spirograph animations that visualize the evolution of these intricate patterns
In this blog post, we will explore the boomerang
effect, a newly introduced feature in the spyrograph
library, which allows us to create mesmerizing animations that play forward and then in reverse. We'll provide examples and explanations on how to harness this feature to create captivating spirograph animations
Table of contents
- Introduction
- The boomerang effect
- Example 1: Basic boomerang animation
- Example 2: Combining boomerang with looping
- Example 3: boomerang effect with custom configurations
chris-greening / spyrograph
Python library for analyzing, exploring, and visualizing epitrochoids and hypotrochoids in just a few lines of code
spyrograph: elegant mathematics and geometries
What is it?
spyrograph is a lightweight Python package that provides an expressive and flexible set of tools for drawing beautiful mathematically driven art. With just a few lines of easy-to-read code you can start analyzing, visualizing, and exploring elegant mathematics
Table of Contents
🔑 Key features
- Expressive and consistent syntax
- Robust underlying mathematics
- Beginner and expert friendly
-
numpy
is the only required third-party installation - Clear visualizations and animations
- Flexible to a wide range of usecases
- Lightweight, just plug and play
💻 Installation
pip
Install the latest stable release from PyPI using
$ pip3 install spyrograph
or clone the development version from GitHub with
$ git clone https://github.com/chris-greening/spyrograph.git
🌱 Quickstart
spyrograph
is designed to be expressive and easy-to-use - simply import spyrograph
and jump right into drawing elegant, complex shapes…
The boomerang effect
The boomerang effect is achieved by playing the animation sequence in reverse after it reaches the end, creating a back-and-forth effect. This feature is particularly useful when you want to visualize the evolution of a spirograph pattern with changing parameters and then observe how it returns to its initial state
To enable the boomerang
effect, we need to set boomerang=True
when calling the animate
method of the spyrograph
library. In the following sections, we will demonstrate how to use this feature with various examples.
Example 1: Basic boomerang animation
In this example, we will create a simple spirograph animation with the boomerang effect. We will use the Hypotrochoid
class from the spyrograph
library to generate our animation
from spyrograph import Hypotrochoid
import numpy as np
# Animate a hypotrochoid by incrementally
# changing the rolling radius r
Hypotrochoid.animate(
R=200,
r=np.arange(113.75, 114.25, .01),
d=133,
thetas=np.arange(0,100, .05),
frame_pause=.01,
boomerang=True,
)
This example generates a Hypotrochoid
animation with varying r
values while keeping R
and d
the same. After reaching the end of the sequence, the animation plays in reverse, creating a boomerang effect.
Example 2: Combining boomerang with looping
The boomerang effect can also be combined with looping, allowing the animation to play continuously. To achieve this, set both the boomerang
and repeat
arguments to True
in the animate
method
from spyrograph import Hypotrochoid
import numpy as np
# Repeating animation of a hypotrochoid by
# incrementally changing the rolling radius r
Hypotrochoid.animate(
R=200,
r=np.arange(113.75, 114.25, .01),
d=133,
thetas=np.arange(0,100, .05),
boomerang=True,
repeat=True
)
With these settings, the animation will loop indefinitely, playing forwards and then in reverse, creating an entrancing visual experience
Example 3: boomerang effect with custom configurations
The boomerang effect can be combined with other custom configurations, such as changing the:
- background color
- line color
- or line width.
In this example, we will create an animation with a black background, a neon green tracing line, and a thicker line width
from spyrograph import Hypotrochoid
import numpy as np
# Neon green hypotrochoid boomerang
# animation on black background
Hypotrochoid.animate(
R=200,
r=np.arange(113.75, 114.25, .01),
d=133,
thetas=np.arange(0,100, .05),
frame_pause=.01,
repeat=True,
boomerang=True,
screen_color="black",
color="#39FF14",
width=3
)
This animation will feature a striking contrast between the neon green spirograph patterns and the black background. The boomerang effect adds another layer of visual interest to this already captivating animation
Conclusion
The boomerang effect is a powerful addition to the spyrograph
library, allowing us to create captivating spirograph animations that play forwards and in reverse. By combining this feature with various parameter configurations and customization options, we can create a wide array of mesmerizing spirograph animations
With a basic understanding of the boomerang effect and the examples provided in this blog post, we are well-equipped to explore the endless possibilities of spirograph animations. Whether you are an artist, mathematician, or a spirograph enthusiast, the boomerang effect is sure to add a unique touch to your spirograph creations
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