Init

Assets/ThirdParty/DestroyIt/Scripts/Runtime/Behaviors/ChipAwayDebris.cs

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+using UnityEngine;
+// ReSharper disable CommentTypo
+// ReSharper disable IdentifierTypo
+
+namespace DestroyIt
+{
+    /// <summary>
+    /// This script is attached to a debris piece at runtime. Your projectiles should check for collisions with 
+    /// ChipAwayDebris and fire the BreakOff() method when impact occurs.
+    /// </summary>
+    public class ChipAwayDebris : MonoBehaviour
+    {
+        public float debrisMass = 1f;
+        public float debrisDrag = 0f;
+        public float debrisAngularDrag = 0.05f;
+        private Renderer _rend;
+
+        public void BreakOff(Vector3 force, Vector3 point)
+        {
+            if (!CheckCanBreakOff()) return;
+
+            // Check whether a rigidbody already exists
+            Rigidbody existingRBody = _rend.gameObject.GetComponent<Rigidbody>();
+            Rigidbody rbody;
+
+            // Make the debris fall away by attaching a rigidbody to it.
+            rbody = existingRBody == null ? _rend.gameObject.AddComponent<Rigidbody>() : existingRBody;
+            rbody.mass = debrisMass;
+            rbody.drag = debrisDrag;
+            rbody.angularDrag = debrisAngularDrag;
+            rbody.AddForceAtPosition(force, point, ForceMode.Impulse);
+            rbody.gameObject.transform.SetParent(null);
+
+            Destroy(this);
+        }
+
+        public void BreakOff(float blastForce, float explosionRadius, float upwardsModifier)
+        {
+            if (!CheckCanBreakOff()) return;
+
+            //Debug.Log("Breaking off");
+            // Make the debris fall away by attaching a rigidbody to it.
+            Rigidbody rbody = _rend.gameObject.AddComponent<Rigidbody>();
+            rbody.mass = debrisMass;
+            rbody.drag = debrisDrag;
+            rbody.angularDrag = debrisAngularDrag;
+            rbody.AddExplosionForce(blastForce, transform.position, explosionRadius, upwardsModifier);
+
+            Destroy(this);
+        }
+
+        private bool CheckCanBreakOff()
+        {
+            // If no collider is on this object, then something weird happened. Exit and destroy self.
+            if (GetComponent<Collider>() == null)
+            {
+                Destroy(this);
+                return false;
+            }
+
+            _rend = gameObject.GetComponentInParent<Renderer>();
+            if (_rend == null)
+            {
+                Destroy(this);
+                return false;
+            }
+
+            // If a rigidbody already exists on this debris piece, remove this script and exit.
+            if (GetComponent<Collider>().attachedRigidbody != null)
+            {
+                Destroy(this);
+                return false;
+            }
+            return true;
+        }
+    }
+}