Boids in Unity: Flocking, Swarming, and Crowds
git-amend
Aug 2, 2026 13:00
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Learn how to build Craig Reynolds' classic Boids algorithm from scratch in Unity. In this tutorial, we'll implement separation, alignment, cohesion, obstacle avoidance, and boundary steering while breaking down every line of code along the way. Whether you're creating flocks of birds, schools of fish, or swarms of AI agents, you'll come away understanding not just how the algorithm works, but why a handful of simple local rules can produce such convincing emergent behavior. This is also a great starting point for experimenting with DOTS, Burst, and other optimizations for simulating thousands of agents.
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▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
Code https://gist.github.com/adammyhre/73082cf86dba7d136d9ee4d72009472b
More Useful Code:
https://github.com/adammyhre?tab=repositories
Unity Utility Library: https://github.com/adammyhre/Unity-Utils
Lock Inspector Hotkey: https://gist.github.com/adammyhre/4754f731a93bf1cab0d1385ccfa23642
*Other Recommended Tools* _(Affiliate Links)_
Ultimate Preview - https://assetstore.unity.com/packages/tools/utilities/ultimate-preview-bundle-340976?aid=1101lw3sv
Mouse Shortcuts - https://assetstore.unity.com/packages/tools/utilities/mouse-button-shortcuts-and-selection-history-228013?aid=1101lw3sv
Init(args) - https://assetstore.unity.com/packages/tools/utilities/init-args-200530?aid=1101lw3sv
Wingman - https://assetstore.unity.com/packages/tools/utilities/wingman-your-inspector-s-best-friend-303181?aid=1101lw3sv
Favorites Window - https://assetstore.unity.com/packages/tools/utilities/favorites-window-123487?aid=1101lw3sv
Scene Notes - https://assetstore.unity.com/publishers/87819?aid=1101lw3sv
Beautify - https://assetstore.unity.com/packages/vfx/shaders/fullscreen-camera-effects/beautify-3-advanced-post-processing-233073?aid=1101lw3sv
Odin - https://assetstore.unity.com/packages/tools/utilities/odin-inspector-and-serializer-89041?aid=1101lw3sv?aid=1101lw3sv
Odin Validator - https://assetstore.unity.com/packages/tools/utilities/odin-validator-227861?aid=1101lw3sv
Hot Reload: https://assetstore.unity.com/packages/tools/utilities/hot-reload-edit-code-without-compiling-254358?aid=1101lw3sv
Better Hierarchy: https://assetstore.unity.com/packages/tools/utilities/better-hierarchy-272963?aid=1101lw3sv
Better Transform: https://assetstore.unity.com/packages/tools/utilities/better-transform-size-notes-global-local-workspace-parent-child--321300?aid=1101lw3sv
Better Mesh Filter: https://assetstore.unity.com/packages/tools/utilities/better-mesh-mesh-preview-full-insight-at-a-glance-321364?aid=1101lw3sv
Editor Console Pro: https://assetstore.unity.com/packages/tools/utilities/editor-console-pro-11889?aid=1101lw3sv
Any Object Finder: https://assetstore.unity.com/packages/tools/utilities/any-object-finder-286455?aid=1101lw3sv
Kybernetic Tools: https://assetstore.unity.com/publishers/16747?aid=1101lw3sv
Sisus Tools: https://assetstore.unity.com/publishers/41398?aid=1101lw3sv
Prime Tween - https://assetstore.unity.com/packages/tools/animation/primetween-high-performance-animations-and-sequences-252960?aid=1101lw3s
Rabbit Logger - https://assetstore.unity.com/packages/tools/utilities/rabbit-logger-305396?aid=1101lw3s
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