So, this is something I’ve run into several times… I’m trying to create a simple ‘zoom’ effect within a dynamic material and want to be able to scale a texture’s UV’s while it maintains its position, centered in the material (as opposed to locking to the top left corner and wrapping or tiling).
Does anyone know a way to do this?
Hi SVR33 -
We have a Material Function in the Engine called ScaleUVsbyCenter which you can search for in the Material Editor.
Thank You
Eric Ketchum
Holy smokes… I even looked in there for something named exactly like that! Not sure how I missed it. Thank you so much, Eric!
would be interesting to know the math involved in that, I need it for something else.
How would you scale UVs from a given position? As for example (0.7 , 0)?
Take a look at the function Eric mentioned. I’m not at my computer at the moment, but I’m fairly certain it takes a vector 2 “position” input (which is 0.5, 0.5 by default)
Got back to my computer to realize that wasn’t right… try “ScaleUVsAroundPoint” function instead.
If your center = [0.5;0.5], then
((UV-[0.5;0.5])*Scale)+[0.5;0.5]
Another words, you just move Center Point to [0;0], scale it and return it to its initial position.