video of the script can be found here: https://youtu.be/u-3WI5WzO7U

League of Legends Healthbar-System

using UnityEngine;

public class HealthBarRenderer : MonoBehaviour {
    /// <summary>
    /// This attributes should be read from a unit's Health-Component
    /// </summary>
    [Header("Health Attributes")]
    public int Health;
    public int PhysicalShield;
    public int MagicalShield;
    public int MaxHealth;

    [Header("Canvas Elements")]
    public RectTransform[] Bars;
    public RectTransform[] Amounts;


    void Update() {
        // this validation should be a unit's health-component
        Health = Mathf.Clamp(Health, 0, MaxHealth);
        PhysicalShield = Mathf.Max(PhysicalShield, 0);
        MagicalShield = Mathf.Max(MagicalShield, 0);

        // relevant part beginning here:

        var max = Mathf.Max(MaxHealth, Health + PhysicalShield + MagicalShield);

        float HealthPercent = (float)Health/max;
        float PhysPercent = (float)PhysicalShield/max;
        float MagPercent = (float)MagicalShield/max;

        Bars[0].anchorMax = new Vector2(HealthPercent, 1);

        Bars[1].anchorMin = new Vector2(HealthPercent, 0);
        Bars[1].anchorMax = new Vector2(HealthPercent + PhysPercent, 1);

        Bars[2].anchorMin = new Vector2(HealthPercent + PhysPercent, 0);
        Bars[2].anchorMax = new Vector2(HealthPercent + PhysPercent + MagPercent, 1);

        
    }

}