Questions tagged [visibility-determination]

Visibility Determination is the process of deciding whether there is a clear & unimpeded line of sight from one game entity or point in space to another.

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In UE4's Blueprints, how do I activate something when the player looks at it?

I want to make an object that activates when the player presses a button, then looks at it. How can I do this using Blueprints Visual Scripting?
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Is there a more useful “inverse” alternative to portal rendering than antiportal rendering?

I'm in the process of sketching out the design of a 3D rendering engine as I'm learning my way around the subject. (Preemptively: yes, I have my reasons for rolling one from scratch, not least the ...
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Tiles on sphere - check visibility

I have a sphere with tiles. I need to heck if tile is visible or not. See the image. Tiles are red squares, "screen" is represented by yellow quad. Currently, I calculate coordinates of tile in ...