unityzgy/Assets/ThirdPackages/VRPackage/VRTK/Examples/ExampleResources/Scripts/Archery/ArrowSpawner.cs

namespace VRTK.Examples.Archery
{
    using UnityEngine;

    public class ArrowSpawner : MonoBehaviour
    {
        public GameObject arrowPrefab;
        public float spawnDelay = 1f;

        private float spawnDelayTimer = 0f;
        private BowAim bow;

        private void Start()
        {
            spawnDelayTimer = 0f;
        }

        private void OnTriggerStay(Collider collider)
        {
            VRTK_InteractGrab grabbingController = (collider.gameObject.GetComponent<VRTK_InteractGrab>() ? collider.gameObject.GetComponent<VRTK_InteractGrab>() : collider.gameObject.GetComponentInParent<VRTK_InteractGrab>());
            if (CanGrab(grabbingController) && NoArrowNotched(grabbingController.gameObject) && Time.time >= spawnDelayTimer)
            {
                GameObject newArrow = Instantiate(arrowPrefab);
                newArrow.name = "ArrowClone";
                grabbingController.GetComponent<VRTK_InteractTouch>().ForceTouch(newArrow);
                grabbingController.AttemptGrab();
                spawnDelayTimer = Time.time + spawnDelay;
            }
        }

        private bool CanGrab(VRTK_InteractGrab grabbingController)
        {
            return (grabbingController && grabbingController.GetGrabbedObject() == null && grabbingController.IsGrabButtonPressed());
        }

        private bool NoArrowNotched(GameObject controller)
        {
            if (VRTK_DeviceFinder.IsControllerLeftHand(controller))
            {
                GameObject controllerRightHand = VRTK_DeviceFinder.GetControllerRightHand(true);
                bow = controllerRightHand.GetComponentInChildren<BowAim>();
                if (bow == null)
                {
                    bow = VRTK_DeviceFinder.GetModelAliasController(controllerRightHand).GetComponentInChildren<BowAim>();
                }
            }
            else if (VRTK_DeviceFinder.IsControllerRightHand(controller))
            {
                GameObject controllerLeftHand = VRTK_DeviceFinder.GetControllerLeftHand(true);
                bow = controllerLeftHand.GetComponentInChildren<BowAim>();
                if (bow == null)
                {
                    bow = VRTK_DeviceFinder.GetModelAliasController(controllerLeftHand).GetComponentInChildren<BowAim>();
                }
            }

            return (bow == null || !bow.HasArrow());
        }
    }
}