Zooming In/Out on a Texture Using Nodes

General Discussion
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#1

Hey guys!

I have a quick question. I have a texture that I want to be able to scale up and down, however when I adjust the UV’s it scales up and down using the bottom-left corner. (0,0 UV, which makes sense) I was wondering if there is a simple technique for doing the same thing, except with using the middle (.5, .5) as the origin instead.

I’m currently using Amplify Shader editor, and looking for a solution that I’m sure is easier then I’m making it, but figured I would ask in case there is a quick answer that would be worth if for me to learn!

Thanks for the help guys!

#2

Invert your X,Y tiling value (1-x) multiply by 0.5 to get half, add that value back into to your original tiling value. That should keep it centered regardless of what your tiling on x and y are

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#3

I’ve tried to create this, but it doesn’t seem to be working. Perhaps I’m misreading something?

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#4

Ah, use a One Minus node instead of multiplying by -1

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#5

Ok, that got it close! It does seem to scale from the “center” of the texture now, but its still using 0,0 as the origin for the scale.

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This is the motion I am trying to create, using the green as the center point, rather then the red.
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#6

Try

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image1561×478 77.1 KB

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#7

And this is Travis’ method.
Try making the scale parameter more friendly here as it’s inverted (0.5 is twice as big, 2 is half as big)

image
image1684×476 65.1 KB

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#8

Awesome! That one worked for me! Thank, both of you guys for the help!

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