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"Geometry" node for pixel height and width of a Texture 2D? How about a RectTransform component height and width?

crustforever 9 aastat tagasi • uuendaja Freya Holmér (Developer) 9 aastat tagasi • 1

Hi. I am just getting started w/ Shader Forge.


Is it possible for Shader Forge to grab the pixel dimensions of a Texture 2D (or the unit dimensions of the UI RectTransform component) and populate a property for me?


I know I can pass them in manually as properties but it's a bit of a maintenance issue to script them in everywhere.


For example, I have a shader that scrolls UVs in the U direction and I want to define the scroll speed as pixels per second (since we're talking about a flat 2D image here). To do that I need to pass in the pixel width of the texture as a property to fill in the formula: pixelspersecond * timedelta / pixelwidth. (pixels per unit would also need to be factored in if it's not 1:1)


Support for grabbing UI RectTransform component info would also be cool, but that would be a much more specific node... (and I don't know if shaderforge is capable of knowing what kind of component it's shading)


Thanks

Vasta

Vasta
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Freya Holmér (Developer) 9 aastat tagasi

I usually only expose those things that Unity provide natively in their shader code, and I believe this isn't one of them. You might be able to do this on the C# end, passing in offsets in the TilingOffset parameter of the texture properties, or by mapping it in world space or object space, rather than UV space.

Vasta
Tagasi lükatud
Freya Holmér (Developer) 9 aastat tagasi

I usually only expose those things that Unity provide natively in their shader code, and I believe this isn't one of them. You might be able to do this on the C# end, passing in offsets in the TilingOffset parameter of the texture properties, or by mapping it in world space or object space, rather than UV space.

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