Overview

Check, if an entity is visible to the player. By visible, we mean any object that is currently on screen and not obstructed by another object. Z-buffer information is taken into consideration when calculating the visibility of the target. Like all checker blocks, this one will only fire an event when the "check" input is triggered.

Inputs

Check

Will fire an event out of one of the outputs, when triggered.

Outputs

Visible

Will fire an event if the target entity is visible at the moment of the check.

Invisible

Will fire an event if the target entity is not visible at the moment of the check.

Refs

Target

Target entity to check for visibility.

Properties

This block has no special properties.

Usage examples

One potential use for this block is for safely de-spawning NPCs without worrying that they will disappear right in front of the player's eyes. In the example below, we do that by first checking whether the player has departed a restrictor, and then we check whether the target NPC is visible to the player. If the NPC is invisible, we send a signal that will despawn the target NPCs. If the target is visible, we wait one second and then re-check the target NPC's visibility.

See also

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