Interact.cs

using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System.Collections.Generic;

public class Interact : MonoBehaviour {
  [Header("Configuration")]
  public string nameOfInteractable = "LUDOTECA";
  public KeyCode keyToInteract = KeyCode.Space;
  public KeyCode keyToExit = KeyCode.Escape;

  [Header("Information")]
  public bool isInteracting;
  public bool isInTrigger = false;
  public Player player;

  [Header("Initialization")]
  public Text interactText;
  public Transform playerSnap;
  public Camera specialCamera;
  public Collider myCollider;

  void Update () {
    if (isInteracting) {
      AllowExitInteraction();
    }

    if (isInTrigger) {
      CheckInteraction();
    }
  }

  void OnTriggerStay (Collider c) {
    Player player = c.GetComponentInParent<Player>();
    if (!player) return;
    this.player = player;

    if (!isInteracting) {
      isInTrigger = true;
      interactText.text = "Presione " + keyToInteract + " para usar la " + nameOfInteractable;
      CheckInteraction();
    } else {
      AllowExitInteraction();
    }
  }

  void OnTriggerExit (Collider c) {
    isInTrigger = false;
    interactText.text = "";
  }

  public void AllowExitInteraction () {
    interactText.text = "Presione " + keyToExit + " para usar la " + nameOfInteractable;
    if (Input.GetKeyDown(keyToExit)) {
      if (myCollider) myCollider.enabled = true;
      isInTrigger = false;
      if (specialCamera) specialCamera.gameObject.SetActive(false);
      interactText.text = "";
      isInteracting = false;
    }
  }

  public void CheckInteraction () {
    if (Input.GetKeyDown(keyToInteract)) {
      if (myCollider) myCollider.enabled = false;
      player.transform.position = playerSnap.position;
      player.transform.rotation = playerSnap.rotation;
      if(specialCamera) specialCamera.gameObject.SetActive(true);
      isInteracting = true;
    }
  }
}