Uploaded February 2021 | Updated September 2026, 1 week ago

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What is a sine wave? In this video, I demonstrate how to use the sin() function in p5.js to simulate simple harmonic motion. Code: thecodingtrain.com/tracks/the-nature-of-code-2/noc/3-angles/5-harmonic-motion

p5.js Web Editor Sketches:
🕹️ Basic: editor.p5js.org/codingtrain/sketches/Fn1feR81W
🕹️ Approximate Time: editor.p5js.org/codingtrain/sketches/uGCYH4-PN
🕹️ Exact Time Exercise: editor.p5js.org/codingtrain/sketches/jp2B-0Wkg
🕹️ Main: editor.p5js.org/codingtrain/sketches/MfvyVULHT
🕹️ Yoyo: editor.p5js.org/codingtrain/sketches/qBhVjZ0pn
🕹️ 2-Axes Exercise: editor.p5js.org/codingtrain/sketches/_ir7-suNG

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Videos:
🎥 The map() function - p5.js Tutorial: youtu.be/nicMAoW6u1g
🎥 Lissajous Curve Table: youtu.be/--6eyLO78CY

Timestamps:
0:00 Back again!
0:21 Why does a graph of sine look like a wave?
2:14 Let's make a breathing circle
4:24 Amplitude and period
7:12 Can we make the period about one second?
8:13 So what's frequency?
8:51 Let's play with increment
10:00 Map sin to y position
10:53 What will you create?

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

🚂 Website: thecodingtrain.com
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🎥 Coding Challenges: youtube.com/playlist?list=PLRqwX-V7Uu6ZiZxtDDRCi6uhfTH4FilpH
🎥 Intro to Programming: youtube.com/playlist?list=PLRqwX-V7Uu6Zy51Q-x9tMWIv9cueOFTFA

🔗 p5.js: p5js.org
🔗 p5.js Web Editor: editor.p5js.org
🔗 Processing: processing.org

📄 Code of Conduct: github.com/CodingTrain/Code-of-Conduct

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#forbeginners #javascript #p5js