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Question by oguztecimer · Sep 21, 2017 at 06:39 PM · shadermeshshaders

How to use mesh data in shader

Hello,

I've been working on a 2d light-shadow system. My plan was to;

  1. Create a mesh of lit spaces inside the screen.

  2. Use that mesh as a guide to create shadows and light with custom shaders.

The first part was not that hard;

Link to gif

I've created the mesh, but i have almost 0 experience in writing shaders. I've been editing already written shaders and i thought it would be easy to do this but after two days of researching / studying shaders, i still don't even know if I can use the mesh data as an input in my shader. I don't know which kind of shader i should use.

I would appreciate if someone tells me if mesh data can or cannot be used as input of a shader, and how to do it if it can be done.

Thank you

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avatar image hexagonius · Sep 22, 2017 at 09:19 AM 0
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This link might help to get you further towards what you want. I think the additionalVertexStreams could be a solution, but it's not documented how a shader accesses them...

https://forum.unity.com/threads/pass-additional-vertex-data-to-the-vertex-shader-without-modifying-mesh-asset.349453/

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