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Question by Bartha · Feb 10, 2019 at 01:01 PM · lighting2d spritesmesh manipulationline of sight

Dynamic spritemask from worldpoints?

My first question ever on any forum, I know it's a bit too dense, but I tried to make it readable.

The questions:

  1. Is there a simple way, to mask a sprite with a mesh (has no depth, just width and height)?

  2. Could i create something else from this data, that can be used as a mask?


Why I ask them:

I wrote a script based on a blogpost (https://ncase.me/sight-and-light/) that creates a mesh, showing what you can see from the player's standpoint, basically it looks like you are a light source.

This is how it looks (apart from the text ofc): This is how it looks (apart from the text ofc)

And a picture with gizmos, blue lines are raycast, and the boxes are raycast hits, incresing in size in sorted order (and changing color from magenta to yellow), sorted by the angular distance from the player. alt text


I am mostly happy with the results, but i wanted to use the created mesh as a mask, so you can only see what is inside it, and the rest of the would remain black, hiding the enemies. (something like this, talking about the blue circle: https://youtu.be/nFR23oru3_U?t=17)

Right now am creating the yellow area, so it kind of would be a solution if created the black area instead, but it would be better if I could use the yellow area to mask enemies.

testmap-2.png (23.6 kB)
testmap.png (8.4 kB)
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