72 lines
2.4 KiB
C#
72 lines
2.4 KiB
C#
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using UnityEngine;
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using TMPro;
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using UnityEngine.InputSystem;
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public class InteractionManager : MonoBehaviour
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{
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public float checkRate = 0.05f;
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private float lastCheckTime;
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public float maxCheckDistance;
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public LayerMask layerMask;
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private GameObject curInteractGameObject;
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private IInteractable curInteractable;
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public TextMeshProUGUI promptText;
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private Camera cam;
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void Start()
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{
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cam = Camera.main;
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}
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void Update()
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{
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// true every "checkRate" seconds
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if (Time.time - lastCheckTime > checkRate)
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{
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lastCheckTime = Time.time;
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// create a ray from the center of our screen pointing in the direction we're looking
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Ray ray = cam.ScreenPointToRay(new Vector3(Screen.width / 2, Screen.height / 2, 0));
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RaycastHit hit;
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// did we hit something?
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if (Physics.Raycast(ray, out hit, maxCheckDistance, layerMask))
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{
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// is this not our current interactable?
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// if so, set it as our current interactable
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if (hit.collider.gameObject != curInteractGameObject)
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{
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curInteractGameObject = hit.collider.gameObject;
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curInteractable = hit.collider.GetComponent<IInteractable>();
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SetPromptText();
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}
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else
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{
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curInteractGameObject = null;
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curInteractable = null;
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promptText.gameObject.SetActive(false);
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}
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}
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}
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}
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// called when we hover over a new interactable
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void SetPromptText()
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{
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promptText.gameObject.SetActive(true);
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promptText.text = string.Format("<b>[E]</b> {0}", curInteractable.GetInteractPrompt());
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}
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// called when we press the "E" button - managed by the Input System
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public void OnInteractInput (InputAction.CallbackContext context)
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{
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// did we press down this frame and are we hovering over an interactable?
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if (context.phase == InputActionPhase.Started && curInteractable != null)
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{
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curInteractable.OnInteract();
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curInteractGameObject = null;
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curInteractable = null;
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promptText.gameObject.SetActive(false);
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}
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}
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public interface IInteractable
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{
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string GetInteractPrompt();
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void OnInteract();
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}
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}
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