Init

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

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+using UnityEngine;
+
+namespace DestroyIt
+{
+    /// <summary>
+    /// This script manages a single support point (a Trigger Collider) on an object. 
+    /// On startup, if the support point is connected to another rigidbody, it will create a custom joint connecting the two.
+    /// </summary>
+    public class SupportPoint : MonoBehaviour
+    {
+        public int breakForce = 750;
+        public int breakTorque = 750;
+
+        private bool _canSupport = true;
+
+        void Start()
+        {
+            if (transform.parent == null)
+            {
+                Debug.Log("[" + name + "] has no parent. Support points are designed to be children of objects that have attached colliders.");
+                _canSupport = false;
+            }
+            else if (transform.parent.GetComponent<Collider>() == null || !transform.parent.GetComponent<Collider>().enabled)
+            {
+                Debug.Log("[" + transform.parent.name + "] has a support point but no enabled collider. Support points only work on objects with colliders.");
+                _canSupport = false;
+            }
+            else if (transform.parent.GetComponent<Collider>().attachedRigidbody == null)
+            {
+                Debug.Log("[" + transform.parent.name + "] has a support point but no attached rigidbody. Support points only work on objects with rigidbodies.");
+                _canSupport = false;
+            }
+
+            if (_canSupport)
+            {
+                Ray ray = new Ray(transform.position - (transform.forward * 0.025f), transform.forward); // need to start the ray behind the transform a little
+                //Debug.DrawRay(this.transform.position, this.transform.forward * .15f, Color.red, 10f);
+                RaycastHit[] hitInfo = Physics.RaycastAll(ray, 0.075f);
+                
+                for(int i=0; i<hitInfo.Length; i++)
+                {
+                    // ignore colliders without rigidbodies to attach a joint to.
+                    if (hitInfo[i].collider.attachedRigidbody == null) continue;
+
+                    // ignore other trigger colliders - we only want to attach to the parent object.
+                    if (hitInfo[i].collider.isTrigger) continue;
+
+                    // Get the forward angle, as it relates to the parent
+                    Vector3 angleAxis = transform.parent.transform.InverseTransformDirection(transform.TransformDirection(Vector3.forward));
+
+                    // Add a stiff joint for support.
+                    transform.parent.GetComponent<Collider>().attachedRigidbody.gameObject.AddStiffJoint(hitInfo[i].collider.attachedRigidbody,
+                        transform.localPosition, angleAxis, breakForce, breakTorque);
+                    break;
+                }
+            }
+
+            Destroy(gameObject);
+        }
+
+        private void OnDrawGizmos()
+        {
+            Gizmos.color = Color.yellow;
+            Gizmos.DrawWireSphere(transform.position - (transform.forward * 0.025f), .01f);
+            Gizmos.DrawRay(transform.position - (transform.forward * 0.025f), transform.forward * 0.075f);
+        }
+    }
+}