131 lines
4.1 KiB
C#
131 lines
4.1 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.UI;
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using RPGCreationKit;
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namespace RPGCreationKit
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{
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/// <summary>
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/// Manages the whole logic behind the Compass
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/// </summary>
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public class Compass : MonoBehaviour
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{
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#region Singleton
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public static Compass instance;
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private void Awake()
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{
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if (instance == null)
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instance = this;
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else
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{
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Debug.LogError("Anomaly detected with the Singleton Pattern of 'Compass', are you using multple Compass?");
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Destroy(this);
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}
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}
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#endregion
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// Transform of the camera
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[SerializeField] private Transform cameraT;
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// References to the compass UI
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[SerializeField] private RectTransform northPointer;
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[SerializeField] private RectTransform curObjPointer;
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// The current objective to point
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private Transform currentObjective;
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private Vector3 lastKnownPos;
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// The north direction
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private Vector3 northDir;
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// currentObjective
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private Vector3 objDir;
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private float angle;
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private void Start()
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{
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// At the start we look if the compass pointer (red one) should be active or not
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CheckActiveObjectives();
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}
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// Update is called once per frame
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private void Update()
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{
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// In each frame we calcualte and update the North and the Direction of the CurrentObjective
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CalculateNorth();
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if (currentObjective != null)
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CalculateObjDir();
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else
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CalculateObjDirLastPos();
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}
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/// <summary>
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/// Calculate and rotate the Compass to north
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/// </summary>
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private void CalculateNorth()
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{
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northDir.z = cameraT.eulerAngles.y;
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transform.localEulerAngles = northDir;
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northPointer.eulerAngles = northDir;
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}
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/// <summary>
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/// Calculate the direction of the object (from the UI pointer to the world) and rotate the pointer toward it
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/// </summary>
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private void CalculateObjDir()
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{
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// Calculate the direction
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objDir = cameraT.InverseTransformDirection(currentObjective.position - cameraT.position);
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// Calculate the angle
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angle = Mathf.Atan2(-objDir.x, objDir.z) * Mathf.Rad2Deg;
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// Rotate the pointer
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curObjPointer.eulerAngles = new Vector3(0, 0, angle);
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lastKnownPos = currentObjective.position;
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}
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/// <summary>
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/// Calculate the direction of the object (from the UI pointer to the world) and rotate the pointer toward it
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/// </summary>
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private void CalculateObjDirLastPos()
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{
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// Calculate the direction
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objDir = cameraT.InverseTransformDirection(lastKnownPos - cameraT.position);
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// Calculate the angle
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angle = Mathf.Atan2(-objDir.x, objDir.z) * Mathf.Rad2Deg;
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// Rotate the pointer
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curObjPointer.eulerAngles = new Vector3(0, 0, angle);
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}
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/// <summary>
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/// Called when a Quest or a QuestObjective updates.
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/// </summary>
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public void OnQuestUpdate()
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{
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currentObjective = null;
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CheckActiveObjectives();
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}
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/// <summary>
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/// Called when a new Quest Objective is active
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/// </summary>
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/// <param name="t">The transform to point to</param>
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public void ChangeQuestObjective(Transform t)
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{
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currentObjective = t;
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CheckActiveObjectives();
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}
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/// <summary>
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/// Enable/Disable the Red Pointer when it is the case.
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/// </summary>
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public void CheckActiveObjectives()
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{
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// Disable the Red Pointer if no marked quest objective is active
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curObjPointer.gameObject.SetActive(currentObjective != null ? true : false);
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}
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}
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} |