How would a developer typically implement a trigger collider in Unity?

A trigger collider in Unity is typically implemented on a GameObject that is part of a physics interaction system. For a trigger collider to function properly, it is common to attach the trigger component to a GameObject without requiring that the GameObject itself has a Rigidbody component, especially if this GameObject is meant solely to detect overlaps and interactions with other colliders rather than actively participate in physics simulations.

When an object has a collider set as a trigger, it enables overlap detection without applying physical forces or being influenced by gravity. The GameObject can still be used to respond to events when it overlaps with other colliders, such as causing an action when players enter a specific area or triggering animations based on the presence of another object.

While using a Rigidbody component can be beneficial for certain types of physics interactions, it is not a strict requirement for trigger colliders, especially when the intention is to simply detect overlaps without simulating full physics dynamics. Therefore, applying a trigger collider to an object without a Rigidbody can be the preferred approach in many scenarios where detecting entry, exit, or presence in defined areas is the primary goal.

Thus, the typical method of implementing a trigger collider focuses on the ability to detect interactions over physical simulation, which is effectively achieved without