Individual skill
unity-physics
Set up 3D physics in Unity 6.3 LTS: Rigidbody movement and forces, colliders, triggers vs collisions, layer-based collision, raycasts, and joints. Use when adding a Rigidbody, handling OnCollisionEnter/OnTriggerEnter, tuning collision layers, casting rays, or when the user mentions Unity physics, AddForce, isKinematic, or linearVelocity.
skills/unity/unity-physics/SKILL.md
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# Unity Physics (Rigidbody / PhysX)
Make objects move, collide, and detect each other with Unity 6.3 LTS's built-in 3D physics
(PhysX). Get the `FixedUpdate` discipline, trigger-vs-collision rules, and collision layers
right. Targets **Unity 6.3 LTS (6000.3)**.
> **Unity 6 renames:** `Rigidbody.velocity` → **`linearVelocity`**, `drag` → **`linearDamping`**,
> `angularDrag` → **`angularDamping`**. The old names still compile in 6.3 LTS but are obsolete
> (warnings; the API Updater offers the rename), so write the new names. `PhysicMaterial` →
> **`PhysicsMaterial`** is a hard compile error in old code.
## When to use
- Use when giving an object physical motion (forces, velocity, gravity), responding to