OnTriggerStay

OnTriggerStay is a function in game development, commonly found in engines like Unity, that is called every frame while a collider is touching another collider. This function is part of a larger system that detects collisions and triggers between game objects. A trigger collider is a collider that does not physically interact with other colliders but instead detects when other colliders enter, stay within, or exit its volume.

The OnTriggerStay function is invoked repeatedly as long as two colliders remain in contact. This makes it useful for scenarios where continuous detection is required. For example, it can be used to apply a constant effect to a player character while they remain within a specific area, such as a poison cloud or an area of influence. It can also be used to check for multiple objects within a proximity.

Unlike OnTriggerEnter, which is called only once when a collider first enters a trigger, or OnTriggerExit, which is called once when a collider leaves a trigger, OnTriggerStay provides ongoing updates. Developers need to be mindful that this function is called every frame, so computationally intensive operations within OnTriggerStay should be optimized to avoid performance issues. The function receives a Collider parameter, representing the other collider that is staying within the trigger.