The plain-English version
Determining when shapes touch, overlap, or intersect, often as part of a physics or gameplay system.
Why it matters
It underpins walls, hazards, pickups, and attacks, but the response to a detected contact is a separate rule.
Let’s make it click
A collectible trigger detects overlap with the player, then a game rule awards a coin and removes the pickup.
Vibe Bro’s heads-up
An accurate-looking sprite can still have an incorrect collision shape; fast movement may also need appropriate continuous checks.
The docs behind it
Documentation links checked .
Editorial review · October 28, 2026
Supported: Contact detection is separated correctly from gameplay response; collision shape and fast-motion caveats are supported concepts.