printing a set amount of decimal places

hammy_

the only calculations i need to do is just adding a number each frame, though wouldn't that be impossible if it's a string? In that case i'd need to convert it back so the entire thing works as intended. It's not a massive issue, just a qualty of life thing, i'll just put a box in front of the unwanted digits considering i'm not doing anything with the background

Hitomi

I made a function like this

//returns string with floating portion rounded to dec number of digits
function float2str(arg, dec)
  dec = pow(10, dec)
  result = str(int(arg)) + "." + int(round(fract(arg) * dec))
return result

MikeDX

@Hitomi said in printing a set amount of decimal places:

I made a function like this

Yours is nicer. I'm deleting mine haha

Nisse5

@Hitomi Yep, that's how I do it as well. The only difference is that I start number-starting strings with ""+int(i) rather than str(int(i)), but that's just cosmetics.

hammy_

damn, all of this is going straight over my head, even understanding a few of the terms used doesn't help at all, never realised something so seemingly simple could end up so complicated

MikeDX

@hammy_ it's easier than it looks.

You want two pieces of information. The whole number a decimal place and finally the 2dp of your float

to get the 2dp, you can do this

// n = 1.988383
w = trunc(n) // 1
f = fract( n )  // 0.988383
_2dp = trunc(n*100)  // 98 
string = str(int(w)) + "." + str(int(_2dp)) // 1 + . + 98  = "1.98"

Hitomi

I put in round also, without that it can sometimes be too low. 99.6 prints out as 99.59998 so to avoid it printing as 99.59 I have it round after I multiplied it by 100

hammy_

@MikeDX why use int() in str(int(w)) and str(int(_2dp))? is that just to make sure there's no decimals after calculations?

MikeDX

@hammy_ said in printing a set amount of decimal places:

why use int() in str(int(w)) and str(int(_2dp))? is that just to make sure there's no decimals after calculations?

That's right. as trunc and fract both return floats.

hammy_

after some mistakes on my part due to mixing languages, i managed to get it sorted, thanks a bunch!