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Assets/Obvious/Soap/Examples/Content/Scripts/Health.cs

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+using JetBrains.Annotations;
+using UnityEngine;
+
+namespace Obvious.Soap.Example
+{
+    [HelpURL("https://obvious-game.gitbook.io/soap/scene-documentation/1_scriptablevariables")]
+    public class Health : MonoBehaviour
+    {
+        [SerializeField] private FloatVariable _currentHealth = null;
+        [SerializeField] private FloatReference _maxHealth = null;
+
+        [Header("Scriptable Events")] [SerializeField] private ScriptableEventInt _onPlayerDamaged = null;
+        [SerializeField] private ScriptableEventInt _onPlayerHealed = null;
+        [SerializeField] private ScriptableEventNoParam _onPlayerDeath = null;
+
+        private bool _isDead = false;
+
+        private void Start()
+        {
+            _currentHealth.Value = _maxHealth.Value;
+            _currentHealth.OnValueChanged += OnHealthChanged;
+        }
+
+        private void OnDestroy()
+        {
+            _currentHealth.OnValueChanged -= OnHealthChanged;
+        }
+
+        private void OnHealthChanged(float newValue)
+        {
+            var diff = newValue - _currentHealth.PreviousValue;
+            if (diff < 0)
+            {
+                OnDamaged(Mathf.Abs(diff));
+            }
+            else
+            {
+                OnHealed(diff);
+            }
+        }
+
+        private void OnDamaged(float value)
+        {
+            if (_currentHealth <= 0f && !_isDead)
+                OnDeath();
+            else
+                _onPlayerDamaged.Raise(Mathf.RoundToInt(value));
+        }
+
+        private void OnHealed(float value)
+        {
+            _onPlayerHealed.Raise(Mathf.RoundToInt(value));
+        }
+
+        private void OnDeath()
+        {
+            _onPlayerDeath.Raise();
+            _isDead = true;
+        }
+
+        //if you don't want to modify directly the health, you can also do it like this
+        //Used in the Event example.
+        [UsedImplicitly]
+        public void TakeDamage(int amount)
+        {
+            _currentHealth.Add(-amount);
+        }
+    }
+}