372 lines
10 KiB
C#
372 lines
10 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine;
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using Random = UnityEngine.Random;
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[RequireComponent(typeof(Rigidbody2D))]
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[RequireComponent(typeof(Collider2D))]
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public class TrickController : MonoBehaviour
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{
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private static readonly List<TrickController> ActiveTricks = new List<TrickController>();
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private static PlayerPlatformerController[] cachedPlayers = Array.Empty<PlayerPlatformerController>();
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private static float nextPlayerCacheTime;
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[SerializeField] private string treatTag = "Interactable";
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[SerializeField] private float moveSpeed = 3.5f;
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[SerializeField] private float targetRefreshInterval = 0.4f;
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[SerializeField] private float consumeDistance = 0.35f;
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[SerializeField] private float wanderInterval = 1.2f;
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[SerializeField] private float consumeCooldown = 1.5f;
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[SerializeField] private TrickController trickPrefab;
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[SerializeField] private float avoidPlayerRadius = 1.2f;
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[SerializeField] private float treatSeekWeight = 1f;
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[SerializeField] private float avoidPlayerWeight = 0.25f;
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[SerializeField] private float avoidTrickWeight = 0.2f;
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[SerializeField] private float wanderWeight = 0.4f;
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[SerializeField] private int maxTricks = 50;
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[SerializeField] private float jumpImpulse = 6f;
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[SerializeField] private float jumpCooldown = 1f;
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[SerializeField] private float jumpChancePerSecond = 0.5f;
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[SerializeField] private LayerMask groundMask = ~0;
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[SerializeField] private float groundCheckDistance = 0.05f;
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private Rigidbody2D body;
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private Transform target;
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private float nextTargetTime;
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private Vector2 wanderDirection;
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private float nextWanderTime;
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private bool isCarried;
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private float nextConsumeTime;
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private float desiredXVelocity;
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private float nextJumpTime;
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private void Awake()
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{
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body = GetComponent<Rigidbody2D>();
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body.bodyType = RigidbodyType2D.Dynamic;
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body.gravityScale = 1f;
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body.freezeRotation = true;
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body.collisionDetectionMode = CollisionDetectionMode2D.Continuous;
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body.interpolation = RigidbodyInterpolation2D.Interpolate;
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}
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private void OnEnable()
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{
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if (!ActiveTricks.Contains(this))
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{
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ActiveTricks.Add(this);
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}
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nextConsumeTime = Time.time + consumeCooldown;
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}
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private void OnDisable()
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{
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ActiveTricks.Remove(this);
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}
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private void Update()
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{
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if (isCarried)
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{
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return;
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}
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if (Time.time >= nextTargetTime)
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{
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target = FindNearestTreat();
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if (target == null)
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{
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// If we can't find treats while we're tagged Interactable, keep moving.
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wanderDirection = Random.insideUnitCircle.normalized;
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if (wanderDirection.sqrMagnitude < 0.01f)
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{
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wanderDirection = Vector2.right;
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}
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nextWanderTime = Time.time + wanderInterval;
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}
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nextTargetTime = Time.time + targetRefreshInterval;
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}
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if (Time.time >= nextWanderTime)
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{
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wanderDirection = Random.insideUnitCircle.normalized;
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if (wanderDirection.sqrMagnitude < 0.01f)
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{
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wanderDirection = Vector2.right;
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}
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nextWanderTime = Time.time + wanderInterval;
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}
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TryConsumeTreat();
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}
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private void FixedUpdate()
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{
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if (isCarried)
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{
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return;
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}
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if (!IsGrounded())
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{
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var airborne = body.linearVelocity;
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airborne.x = 0f;
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body.linearVelocity = airborne;
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return;
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}
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Vector2 desiredVelocity;
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var hasTarget = target != null;
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var canConsume = Time.time >= nextConsumeTime;
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var desiredX = 0f;
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if (hasTarget && canConsume)
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{
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var direction = ((Vector2)target.position - (Vector2)transform.position).normalized;
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desiredX += direction.x * treatSeekWeight;
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}
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else
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{
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desiredX += wanderDirection.x * wanderWeight;
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}
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// No trick-avoidance bias.
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if (Mathf.Abs(desiredX) < 0.01f)
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{
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desiredX = wanderDirection.x * 0.2f;
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}
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desiredVelocity = new Vector2(Mathf.Clamp(desiredX, -1f, 1f) * moveSpeed, 0f);
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var velocity = body.linearVelocity;
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desiredXVelocity = desiredVelocity.x;
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velocity.x = Mathf.Lerp(velocity.x, desiredXVelocity, 0.25f);
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body.linearVelocity = velocity;
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var isMoving = Mathf.Abs(desiredXVelocity) > 0.1f;
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TryJump(isMoving, desiredXVelocity);
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}
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private Transform FindNearestTreat()
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{
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var treats = GameObject.FindGameObjectsWithTag(treatTag);
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if (treats == null || treats.Length == 0)
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{
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return null;
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}
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Transform best = null;
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var bestDistance = float.MaxValue;
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var origin = transform.position;
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for (var i = 0; i < treats.Length; i++)
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{
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var candidate = treats[i];
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if (candidate == gameObject)
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{
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continue;
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}
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if (!candidate.activeInHierarchy)
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{
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continue;
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}
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if (!candidate.TryGetComponent<Collider2D>(out var collider) || !collider.enabled)
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{
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continue;
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}
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var distance = Vector2.Distance(origin, candidate.transform.position);
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if (distance < bestDistance)
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{
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bestDistance = distance;
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best = candidate.transform;
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}
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}
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return best;
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}
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private void TryConsumeTreat()
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{
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if (isCarried)
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{
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return;
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}
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if (Time.time < nextConsumeTime)
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{
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return;
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}
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var hits = Physics2D.OverlapCircleAll(transform.position, consumeDistance);
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for (var i = 0; i < hits.Length; i++)
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{
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var hit = hits[i];
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if (hit == null || hit.gameObject == gameObject || !hit.CompareTag(treatTag))
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{
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continue;
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}
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var spawnPosition = hit.transform.position;
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hit.enabled = false;
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hit.gameObject.tag = "Untagged";
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Destroy(hit.gameObject);
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if (target == hit.transform)
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{
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target = null;
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}
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SpawnTrick(spawnPosition);
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nextConsumeTime = Time.time + consumeCooldown;
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break;
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}
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}
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private void SpawnTrick(Vector3 position)
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{
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if (maxTricks > 0 && ActiveTricks.Count >= maxTricks)
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{
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return;
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}
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if (trickPrefab != null)
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{
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Instantiate(trickPrefab, position, Quaternion.identity);
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return;
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}
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Instantiate(gameObject, position, Quaternion.identity);
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}
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private float GetAvoidPlayerDirection()
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{
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if (Time.time >= nextPlayerCacheTime)
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{
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cachedPlayers = FindObjectsByType<PlayerPlatformerController>(FindObjectsSortMode.None);
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nextPlayerCacheTime = Time.time + 0.5f;
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}
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var players = cachedPlayers;
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if (players == null || players.Length == 0)
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{
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return 0f;
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}
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Transform closest = null;
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var closestDist = float.MaxValue;
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var origin = transform.position;
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for (var i = 0; i < players.Length; i++)
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{
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var candidate = players[i];
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if (candidate == null || !candidate.gameObject.activeInHierarchy)
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{
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continue;
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}
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var dist = Vector2.Distance(origin, candidate.transform.position);
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if (dist < closestDist)
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{
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closestDist = dist;
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closest = candidate.transform;
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}
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}
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if (closest == null || closestDist > avoidPlayerRadius)
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{
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return 0f;
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}
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return Mathf.Sign(origin.x - closest.position.x);
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}
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private void TryJump(bool isMoving, float jumpDirection)
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{
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if (!isMoving || Time.time < nextJumpTime)
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{
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return;
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}
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if (!IsGrounded())
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{
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return;
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}
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var chance = jumpChancePerSecond * Time.fixedDeltaTime;
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if (Random.value > chance)
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{
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return;
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}
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var velocity = body.linearVelocity;
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velocity.y = 0f;
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var jumpDir = Mathf.Sign(jumpDirection);
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if (jumpDir == 0f)
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{
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jumpDir = Random.value < 0.5f ? -1f : 1f;
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}
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velocity.x = jumpDir * moveSpeed;
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body.linearVelocity = velocity;
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body.AddForce(Vector2.up * jumpImpulse, ForceMode2D.Impulse);
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nextJumpTime = Time.time + jumpCooldown;
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}
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private bool IsGrounded()
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{
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var collider = GetComponent<Collider2D>();
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if (collider == null)
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{
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return false;
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}
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var bounds = collider.bounds;
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var checkSize = new Vector2(bounds.size.x * 0.9f, groundCheckDistance * 2f);
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var checkCenter = new Vector2(bounds.center.x, bounds.min.y - groundCheckDistance);
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var hits = Physics2D.OverlapBoxAll(checkCenter, checkSize, 0f, groundMask);
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for (var i = 0; i < hits.Length; i++)
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{
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var hit = hits[i];
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if (hit != null && hit != collider)
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{
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return true;
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}
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}
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return false;
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}
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public void SetCarried(bool carried)
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{
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isCarried = carried;
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if (carried)
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{
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target = null;
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desiredXVelocity = 0f;
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var velocity = body.linearVelocity;
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velocity.x = 0f;
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velocity.y = 0f;
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body.linearVelocity = velocity;
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nextJumpTime = Time.time + 0.1f;
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if (TryGetComponent<Collider2D>(out var collider))
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{
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collider.enabled = false;
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}
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}
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else
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{
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var velocity = body.linearVelocity;
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velocity.x = 0f;
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velocity.y = 0f;
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body.linearVelocity = velocity;
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if (TryGetComponent<Collider2D>(out var collider))
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{
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collider.enabled = true;
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}
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}
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}
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}
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