Programmer Humor

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Aaargh....my eyes......my eyes...... (lemmy.world)

submitted 8 months ago by devilish666 to c/[email protected]

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[–] [email protected] 155 points 8 months ago (18 children)

public class GameManager : MonoBehaviour
{
    public bool EnableHighContrast;
    public bool PlayerWon;
    public float PlayerUnitsMoved;
    public int PlayerDeathCount;
    public float PlayerHealth;

    public void PlayerTakeDamage(float damage)
    {
        PlayerHealth -= damage;
        if (PlayerHealth < 0)
        {
            PlayerDieAndRespawn();
        }
    }

    public void PlayerDieAndRespawn()
    {
        return;
    }
}

I couldn't contain myself.

[–] [email protected] 55 points 8 months ago (10 children)

Should it be

PlayerHealth <= 0

Otherwise the player could have 0 health and not die? I’m sleep deprived so forgive me if I’m wrong

[–] joshfaulkner 5 points 8 months ago* (last edited 8 months ago) (3 children)

I know this is /c/Progammerhumor, but I wanted to pull on this thread a little bit for my own edification. I'm a Python guy and have been a while, but I've dabbled in other languages. The screenshot says "MonoBehaviour" which makes me assume this is mono or a .Net-like language (you know what happens when you assume).

If your player health is a float, would mono or .Net have an issue comparing the float with integer zero "0"? I mean, it seems like floating point precision may make it impossible for it to ever "equal" integer zero, but it also seems like the code isn't accounting for that precision error.

Am I overthinking this?

[–] herrvogel 7 points 8 months ago (1 children)

Floating point errors are a product of how floating points work as a mathematical concept. So they're independent of the programming language and can happen everywhere.

In this case though, I doubt it's a critical issue. So the player "died" when they actually had 0.000000000027 hp left or whatever. Who cares? Do you need to be that precise?