Outline shader - [Game Maker Studio 2 | Epic]

This epic video tutorial shows you how to make an outline on a given sprite with a shader in GameMaker Studio.

Idea behind the whole procedure is quite simply. Take the area of the sprite which is transparent. There we have 4 checks. Each check checks if there is one unit (one texel) to the left/right/bottom/up from the current position an texel that isn't transparent. If that is the case draw on this empty space a colored pixel.

Outline shader "original" code: by GameMaker Casts https://www.youtube.com/watch?v=3CjdkRid5dA

Free outline (from this video) shader code found here: https://www.patreon.com/posts/outline-shader-42396444

Shader basics: www.youtube.com/watch?v=tKnO2kMWUOY

Texture page: www.youtube.com/watch?v=DBrGo0YFla0

▶ Gamemaker Studio: https://www.yoyogames.com/get

▶ Trial limitations: https://help.yoyogames.com/hc/en-us/articles/230407528-GameMaker-Studio-2-Trial-Limitations

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