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Question by ComradeVanti · Jul 28, 2017 at 09:09 AM · shaderrenderingmeshesoverlappolygon

Only render mesh over other mesh

Heyho there friends.

So heres my situation.

Im making a 2D games, which out of various reasons uses 2D meshes instead of sprites. I use them to make polygons.

Now lets say I have these 2 polygons:

alt text

Basically what I want to achieve is that only the the part of the red pentagon that is OVER the yellow rectangle gets rendered. So like this:

alt text

Until now I did this by calculating the union of both meshes and then changing them accordingly. But this is not only prone to errors but also sometimes performance heavy.

There must be a more elegant way. You know of any? I assume there is a shader or something that will do this with ease, right?

Thanks in advance guys. :D

1.png (1.6 kB)
2.png (1.1 kB)
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Answer by ComradeVanti · Sep 05, 2017 at 03:23 PM

Found it myself. The solution is called "Stencil Buffers". If you have the same problem, do some research on them and you will have a working shader in no time :)

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