Progress bar (i.e. Health, Mana, etc...) filling up gradually...

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This question isn't a duplicate; my method is different to any I've found online thus far, so I've decided to ask my own question. My values are all integers, no floats are involved apart from the value to be drawn on the bars, which is just for appearance. What I want to do is have it smoothly change from one value to the next if adding or subtracting. Here is my code related to the bars filling:

     private void HandleBar() {
         healthBar.fillAmount = Map(CurHealth, 0, MaxHealth, 0, 1);
         manaBar.fillAmount = Map(CurMana, 0, MaxMana, 0, 1);
         xpBar.fillAmount = Map(CurrentXP, 0, MaximumXP, 0, 1);
 
         EnemyHealthBarFill.fillAmount = Map(PlayerMovement.EnemyCurHealth, 0, PlayerMovement.EnemyMaxHealth, 0, 1);
     }
 
     private float Map(float value, float inMin, float inMax, float outMin, float outMax) {
         return(value - inMin) * (outMax - outMin) / (inMax - inMin) + outMin;
     }

I then run HandleBar() in Update() so it constantly keeps track of the bars and their progress. I've been playing around with it for quite a while trying to see how I could achieve this but to no avail... Thanks in advance ^__^

Answer 1

Answer by etaxi341 · Aug 30, 2016 at 02:45 PM

Well you could just Lerp between the values. So if the Value used to be 1 and is now 2 you can make this:

 speed = 10f //Defines how fast it switches between the 2 values
 
 progressbarvalue = Mathf.Lerp(progressbarvalue, newValue, Time.deltaTime * speed);

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DubstepDragon · Aug 30, 2016 at 07:14 PM 0

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I haven't really touched Lerping at all, would it be okay if you edited my code above to include that? That way it'll help me understand and make it easier for me to get it going... thanks :)

Owen-Reynolds DubstepDragon · Aug 30, 2016 at 08:08 PM 0

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The equation above is the semi-standard "fast then slow" trick. It won't solve any of your math problems. It's just a common Unity way to make a number track a target value over several frames. Several frames is the key thing.

Is that what you wanted? If you smash an enemy's health to 50% in one hit, do you want the health bar to drift down over a second or two? If so, do you want it to be smooth, or fast at first then slower as it gets close (which is what that formula does)?

DubstepDragon Owen-Reynolds · Aug 31, 2016 at 04:09 PM 0

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I want it to deplete/increase at the same rate; i.e. a fixed speed, but having it appear to transition smoothly between one value and the other at a steady rate, at the same constant speed; taking 5 damage should deplete twice as fast as taking 10 damage, in other words it is not based on the amount missing. I just want it to move smoothly between the values instead of directly setting the length of the GUI slider to reflect the amount of HP remaining.

Hope that makes sense ^__^

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Stealthygolem · Nov 06, 2017 at 04:55 PM 0

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Using this code granted me success in creating a gradual bar. Now I have a static health bar, and a smooth red health bar to indicate the chunk of damage that was just lost. Using this smoothing worked like a charm!

Progress bar (i.e. Health, Mana, etc...) filling up gradually...

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