Add a Denominator to anchors (Default to 1)

[fcolecumberri]

Describe the project you are working on

This applies to any GUI implementation.

Describe the problem or limitation you are having in your project

Trying to make an object be in the correct pixel position.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

The idea is fairly simple, let's say you want to have a node starting at 1/3 from it's parent. for this you may use an anchor and put it to 0.333. however, the problem here is that 1/3 != 0.333 so depending on the situation, stuff might get a pixel off (it could be 2 pixels in 4k resolution: 3840*0.333 = 1278 != 3840/3 = 1280). You could add more 3333 but at some point, not adding 3s becomes an easy mistake to make.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

The idea I propose is to make anchors fractions having 2 values, a numerator and denominator and calculate the position as (space*numerator)/denominator so in cases were space and denominator share common factors those will naturally cancel out getting the closest value.

Both values could still be float so if someone wants to make a weird value, that would be available.

Is there a reason why this should be core and not an add-on in the asset library?

Because it's a modification of how the core works.

[Calinou]

You can write 1.0/3 in the inspector and it'll automatically write 0.333... with the highest number of decimals allowed by the property (according to its range hint).

[fcolecumberri]

You can write 1.0/3 in the inspector and it'll automatically write 0.333... with the highest number of decimals allowed by the property (according to its range hint).

I swear I truly didn't know that the highest number of decimals allowed is 3.
Now I know adding 3s is not even a posible solution.

[theraot]

Given that there are 16K displays... What about a couple more decimal places? I'm not against exploring other ways to handle this, but adding a couple decimal places is a very small change which could be done right away.

[Calinou]

See also #3524.