Percentage in BYOND in Developer Help

ID:155391
 
Jul 17 2011, 10:12 am
Hi,I'm currently trying to make a health bar for my HUD , in an RPG game, unfortunately, I can't go If(hp == 90) icon_state = "90hp" , because at a high level, 90 would be VERY low.
So, does anyone know how to do percentage?
#1 Jul 17 2011, 11:25 am
You wouldn't need to put the ,1 at the end of the round().
Round() defaults to 1. ;)
#2 Jul 17 2011, 11:42 am
so, would I just make icon states called 90 70 and 50 and so on?
#3 Jul 17 2011, 12:21 pm
#4 Jul 17 2011, 12:25 pm
In response to Oasiscircle (#1)
Oasiscircle wrote:
You wouldn't need to put the ,1 at the end of the round().
Round() defaults to 1. ;)

Actually, round(n) is equivalent to a floor() function, whereas round(n,1) will round to the nearest whole number. For simple displays like this, it probably doesn't matter, but it's important to keep in mind when doing heavier calculations.

round(0.7) = 0
round(0.7,1) = 1
#5 Jul 17 2011, 12:31 pm
In response to DarkCampainger (#4)
Oh, thanks for clarifying that!
I never knew that.
#6 Jul 17 2011, 12:35 pm
In response to BeignetLover (#2)
If you wanted the percentage to round to the nearest 10, you'd put round(X, 10) where X is the percentage calculation (current/max * 100).
#7 Jul 17 2011, 11:42 pm
Lige wrote:
BeignetLover wrote:
Hi,I'm currently trying to make a health bar for my HUD , in an RPG game, unfortunately, I can't go If(hp == 90) icon_state = "90hp" , because at a high level, 90 would be VERY low.
So, does anyone know how to do percentage?

> icon_state="[round(health/maxhealth*100,1)]%"
>

It's giving me crap about constant expression, which I don't even know what that is, and it recognizes "HP/maxHP" as a full variable ;( Anyone know why?
#8 Jul 18 2011, 11:22 am
In response to BeignetLover (#7)
It's because you're attempting to set the variable to an expression at compile time. Instead of this:

obj
    health_bar
        icon_state="[round(health/maxhealth*100,1)]%"
        var
            health
            maxhealth

mob
    proc/take_damage(n)
        hp -= n
        health_bar.health -= n


You need this:

obj
    health_bar
        proc/set_health(health,maxhealth)
                    icon_state="[round(health/maxhealth*100,1)]%"

mob
    proc/take_damage(n)
        hp -= n
        health_bar.set_health(hp, max_hp)