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What happens when two circles collide in a p5.js canvas? In this video, I examine the math and implement idealized elastic collisions in a JavaScript physics simulation. This video supplements the Nature of Code book series in Chapter 6 which uses 3rd party physics libraries to handle collisions rather than a direct implementation. Code:
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p5.js Web Editor Sketches:
🕹️ Elastic Collisions:
🕹️ Elastic Collisions - Quadtree:
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📕 The Nature of Code:
🛒 Pre-order The Nature of Code:
🔗 Elastic Collision:
📃 2-Dimensional Elastic Collisions without Trigonometry:
📃 Elastic Collisions Formula Derivation:
Related Coding Challenges:
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Timestamps:
0:00 Introduction
0:20 The Nature of Code book
1:22 Review background material
4:15 Collision Resolution
5:42 Start Coding
8:48 Add collide() function
10:17 Momentum and kinetic energy
14:15 Line of impact
16:44 Add the formulas
21:25 Simplify the code
22:57 Check for overlap
24:31 Check the particle's kinetic enery
25:48 Fix error
27:30 Add more particles
30:11 Optimizations
30:50 Outro
Editing by Mathieu Blanchette
Animations by Jason Heglund
Music from Epidemic Sound
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2024/07/13
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