Cannot figure out sizeof()

Unity Engine
1

Hello. I am relatively new to coding, and am trying to make an object (a card) snap to a grid in the x-coordinate. I cannot figure out what it wants me to put in the parenthesis outside of sizeof, and was unable to find any information online

Here is the code

objCard.transform.position = new vector3(Mathf.round(objCard.x/sizeof(objCard.x))*sizeof(objCard.x) , objCard.y, objCard.z);
2

where did you got this code? is a tutorial?

3

No. It is not a tutorial

4

so what are you trying to do? I don’t understand why you are using the sizeof function

5

I am trying to make the card snap to a grid. The logic below is what does that
(Mathf.round(objCard.x/sizeof(objCard.x))*sizeof(objCard.x)

It is taking the x-position of the card, dividing it by the length of the card, rounding the answer, and multiplying it by the card width. If the x-position is 33, and card is 10 long, it would be
round(33/10)*10 = 30

6

Size of is its size in memory and is nothing whatsoever to do with its position on screen. You can quickly find this with a search though: sizeof operator - determine the storage needs for a type - C# reference | Microsoft Learn

7

I know that sizeof doesn’t deal with the position on the screen. I need to reference the height/width of the card

8

No, this is not what this expression does. What you have written is taking the x-position of the card, dividing it by the amount of bytes the x variable of the objCard needs to be represented in memory and after rounding it is multiplying it by the amount of memory the x variable needs.

There is nothing in the sizeof method that has to do anything with the length/width of the card, unless you have overwritten the method and have implemented you own sizeof(), which is a bad practice as it will confuse everyone reading it.

9

Why then did you title your post as “cannot figure out sizeof()” if you know what it does? If you’re not clear then you won’t get a clear answer.

The community won’t know how to get the width/height because you don’t state what the card actually is. There isn’t a “card” type in Unity so it could be anything. Again, you need to provide more information if you want a useful answer.