using UnityEngine; using Random = UnityEngine.Random; using Unity.MLAgents; using UnityEngine.Events; namespace Unity.MLAgentsExamples { /// /// Utility class to allow target placement and collision detection with an agent /// Add this script to the target you want the agent to touch. /// Callbacks will be triggered any time the target is touched with a collider tagged as 'tagToDetect' /// public class CollisionCallbacks : MonoBehaviour { [Header("Collider Tag To Detect")] public string tagToDetect = "agent"; //collider tag to detect [Header("Target Placement")] public float spawnRadius; //The radius in which a target can be randomly spawned. public bool respawnIfTouched; //Should the target respawn to a different position when touched [Header("Target Fell Protection")] public bool respawnIfFallsOffPlatform = true; //If the target falls off the platform, reset the position. public float fallDistance = 5; //distance below the starting height that will trigger a respawn private Vector3 m_startingPos; //the starting position of the target private Agent m_agentTouching; //the agent currently touching the target [System.Serializable] public class TriggerEvent : UnityEvent { } [Header("Trigger Callbacks")] public TriggerEvent onTriggerEnterEvent = new TriggerEvent(); public TriggerEvent onTriggerStayEvent = new TriggerEvent(); public TriggerEvent onTriggerExitEvent = new TriggerEvent(); [System.Serializable] public class CollisionEvent : UnityEvent { } [Header("Collision Callbacks")] public CollisionEvent onCollisionEnterEvent = new CollisionEvent(); public CollisionEvent onCollisionStayEvent = new CollisionEvent(); public CollisionEvent onCollisionExitEvent = new CollisionEvent(); // Start is called before the first frame update void OnEnable() { m_startingPos = transform.position; if (respawnIfTouched) { MoveTargetToRandomPosition(); } } void Update() { if (respawnIfFallsOffPlatform) { if (transform.position.y < m_startingPos.y - fallDistance) { Debug.Log($"{transform.name} Fell Off Platform"); MoveTargetToRandomPosition(); } } } /// /// Moves target to a random position within specified radius. /// public void MoveTargetToRandomPosition() { var newTargetPos = m_startingPos + (Random.insideUnitSphere * spawnRadius); newTargetPos.y = m_startingPos.y; transform.position = newTargetPos; } private void OnCollisionEnter(Collision col) { if (col.transform.CompareTag(tagToDetect)) { onCollisionEnterEvent.Invoke(col); if (respawnIfTouched) { MoveTargetToRandomPosition(); } } } private void OnCollisionStay(Collision col) { if (col.transform.CompareTag(tagToDetect)) { onCollisionStayEvent.Invoke(col); } } private void OnCollisionExit(Collision col) { if (col.transform.CompareTag(tagToDetect)) { onCollisionExitEvent.Invoke(col); } } private void OnTriggerEnter(Collider col) { if (col.CompareTag(tagToDetect)) { onTriggerEnterEvent.Invoke(col); } } private void OnTriggerStay(Collider col) { if (col.CompareTag(tagToDetect)) { onTriggerStayEvent.Invoke(col); } } private void OnTriggerExit(Collider col) { if (col.CompareTag(tagToDetect)) { onTriggerExitEvent.Invoke(col); } } } }