In this video, I go over the basics of collision detection, going over the differences between both broad vs narrow phase and AABB vs SAT. This video is actually a remake of a video I made back in March, which is now unlisted, but still available to watch if you want to.

Original video:    • Collision Detection  

I'm still working on the interactive demo on my website, but I figured I'd rather just release the video before it's finished rather than delaying it further. I'll try to finish it soon!


TABLE OF CONTENTS:
• (0:00) Intro
• (0:43) Broad vs Narrow Phase
• (1:31) AABB Collision Detection
• (3:35) SAT Collision Detection
• (5:45) Solid Objects


CORRECTIONS:
• (1:23) Correction: AABB is usually classified as a broad phase method, and is often used in conjunction with SAT. (Thanks to ‪@landru27‬ for pointing this out!)
• (1:43 and 3:39) Clarification: This doesn't mean AABB can't be used on objects that aren't nonrotated rectangles; it's relatively easy to wrap any object in an axisaligned bounding box for the purposes of AABB. The tradeoff of doing this is that the results of the test won't be completely accurate (since the bounding box will contain some amount of empty space), which is why it may be desirable to use SAT or another method after using AABB to narrow it down. (Thanks again to ‪@landru27‬)


SOURCES:
• (1) SAT StackExchange post cited in video
https://gamedev.stackexchange.com/que...
• (2) Continuation of the post cited above
https://gamedev.stackexchange.com/que...
• (3) AABB explanation by Mozilla
https://developer.mozilla.org/enUS/d...
• (4) Explanation of SAT & the math behind it
https://www.sevenson.com.au/actionscr...
• (5) Further explanation of both methods
https://studiofreya.com/3dmathandp...
• (6) Broad phase methods & explanations
https://research.ncl.ac.uk/game/maste...
• (7) More about the broad phase
https://developer.nvidia.com/gpugems/...


MUSIC:
• (0:00 3:33) Dustforce OST Baryogenesis
• (3:35 6:45) Dustforce OST Cider Time
• (Outro) DM Dokuro raincloud’s slumber


SOFTWARE:
• Audio Recording: Audacity
https://www.audacityteam.org/
• Screen Recording: OBS
https://obsproject.com/
• Image Editing: GIMP
https://www.gimp.org/
• Video Editing: HitFilm Express
https://fxhome.com/express