Coding Challenge #126: Toothpicks

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Published on December 21, 2018 7:20:20 PM ● Video Link: https://www.youtube.com/watch?v=-OL_sw2MiYw

Duration: 31:13

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In this coding challenge, I implement Omar Pol’s fractal toothpick sequence. Code: https://thecodingtrain.com/challenges/126-toothpicks

🕹️ p5.js Web Editor Sketch: https://editor.p5js.org/codingtrain/sketches/SJMl3u5xN

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References:
🔗 The On-Line Encyclopedia of Integer Sequences: https://oeis.org/A139250
🔗 Explorations Omar Pol’s toothpick sequence: https://oeis.org/A139250/a139250.anim.html

Videos:
🎥 Terrific Toothpick Patterns: https://youtu.be/_UtCli1SgjI
🔴 Coding Train Live 163: https://youtu.be/pKyU92cza0Y?t=6250s

Related Coding Challenges:
🚂 #2 Menger Sponge Fractal: https://youtu.be/LG8ZK-rRkXo
🚂 #14 Recursive Fractal Trees: https://youtu.be/0jjeOYMjmDU
🚂 #123 Chaos Game: https://youtu.be/7gNzMtYo9n4
🚂 #129 Koch Fractal Snowflake: https://youtu.be/X8bXDKqMsXE
🚂 #174 AppleSoft Basic Fractal Tree: https://youtu.be/UNkHditYGls

Timestamps:
0:00 Introducing today's topic
1:00 The On-Line Encyclopedia of Integer Sequences
2:41 Toothpick number sequence
3:36 Start Coding!
4:00 Create a toothpick class
4:38 Each toothpick will have a length, center point, and direction
7:20 Write a show() function
8:11 Create an array list of toothpicks
9:03 Add a toothpick at the center of the canvas
10:50 Create an array list to hold the next generation of toothpicks
14:00 Each toothpick checks whether its end points are free
19:01 Add a new toothpick at a free point
19:55 Use mousePressed() to add toothpicks
21:32 Optimize by only checking the new toothpicks
23:38 Dynamically adjust the scale of the toothpicks
27:39 Adjust strokeWeight as scale changes
29:15 Print the sequence to the console
30:09 Other toothpick variations
30:45 Conclusion and creative possibilities

Editing by Mathieu Blanchette
Animations by Jason Heglund
Music from Epidemic Sound

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#toothpickpattern #fractal #omarpol #processing