Health Regen Stop After Damage

Questions & Answers
1

I’m working on a health regen system for a game and I’m running into some issues. Seems no one else has tried this as far as I can tell so I HAVE Googled it already.

Anyway I want the system to act like this:
When damage is received, wait x seconds and and then start the regen process. If damage is received WHILE regening, stop the regen process and start over.

I can’t quite figure out how exactly to do this. Here is my code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class HealthScript : MonoBehaviour {

	int maxHealth = 100; //Player's Max health
	public float currentHealth; //Player's Current health
	public float regenSpeed; //Regen speed (wait time)
	public float regenWaitTime; //Time before regen starts
	bool isRegen = false; //If regening
	bool canRegen = true; //If can regen

	void Start(){
		currentHealth = maxHealth; //Sets player health
	}
	
	void Update () {
		if(currentHealth>maxHealth){
			currentHealth = maxHealth;
		}else if(currentHealth!=maxHealth && !isRegen){ //If they have health less than max
			StartCoroutine(Regen()); //Start regen
		}
	}

	//Function for health regen
	IEnumerator Regen(){
		isRegen = true; //Set regenning to true
		yield return new WaitForSeconds(regenWaitTime); //Wait for delay

		while(currentHealth<maxHealth){ //Start the regen cycle
				currentHealth += 1; //Increase health by 1
				yield return new WaitForSeconds(regenSpeed); //Wait for regen speed
		}
		isRegen = false; //Set regenning to false
	}

	//Function for dying
	void Die(){
		Debug.Log(this.name+" died."); //This is where death cycle will go
		canRegen = false;
	}

	//Function for taking damage
	public void TakeDamage(float damage){
		if(currentHealth<=0){
			Die();
		}else{
			currentHealth -= damage; //Remove health
		}
	}
}
2

You can use StopCoroutine for this,
However you will have to store the coroutine in order to stop it,
because calling Regen will always return a new IEnumerator.
So it isn’t the same when u do StopCoroutine(Regen()); and it won’t work.
You will have to save and use it like so:

IEnumerator couroutine = Regen();
StopCoroutine(couroutine);

// Actual code:

    private Coroutine coroutine;
    void Update()
    {
        if (currentHealth > maxHealth)
        {
            currentHealth = maxHealth;
        }
        else if (currentHealth != maxHealth && !isRegen)
        { //If they have health less than max
            coroutine = Regen();
            StartCoroutine(coroutine); //Start regen
        }
    }
    //Function for taking damage
    public void TakeDamage(float damage)
    {
        if (isRegen)
        {
            StopCoroutine(couroutine);
            isRegen = !isRegen;
        }
        if (currentHealth <= 0)
        {
            Die();
        }
        else
        {
            currentHealth -= damage; //Remove health
        }
    }