97 lines
3.2 KiB
C#
97 lines
3.2 KiB
C#
using UnityEngine;
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namespace BaseGames.Enemies
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{
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/// <summary>
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/// 敌人移动组件（架构 07_EnemyModule §3）。
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/// 实现：水平移动、面向目标、击退。
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/// ⚠️ 使用 Rigidbody2D.velocity（Unity 2022 LTS）。
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/// </summary>
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[RequireComponent(typeof(Rigidbody2D))]
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public class EnemyMovement : MonoBehaviour
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{
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[SerializeField] private EnemyStatsSO _config;
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[SerializeField] private SpriteRenderer _spriteRenderer;
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private Rigidbody2D _rb;
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private int _facingDir = 1;
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public bool IsGrounded { get; private set; }
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private void Awake()
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{
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Debug.Assert(_config != null, "[EnemyMovement] _config 未赋值，请在 Prefab Inspector 中指定 EnemyStatsSO。", this);
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_rb = GetComponent<Rigidbody2D>();
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}
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/// <summary>按 SO 配置速度水平移动。dir: +1 右 / -1 左 / 0 停止。</summary>
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public void MoveHorizontal(float dir)
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{
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float speed = _config.WalkSpeed;
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_rb.velocity = new Vector2(dir * speed, _rb.velocity.y);
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UpdateFacing(dir);
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}
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/// <summary>显式指定速度（BD 追击任务调用）。</summary>
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public void MoveWithSpeed(float dir, float speed)
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{
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_rb.velocity = new Vector2(dir * speed, _rb.velocity.y);
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UpdateFacing(dir);
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}
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public void FaceTarget(Vector2 targetPos)
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{
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float dir = targetPos.x < transform.position.x ? -1f : 1f;
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UpdateFacing(dir);
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}
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public void ApplyKnockback(Vector2 dir, float force)
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{
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_rb.velocity = dir.normalized * force;
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}
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public void StopHorizontal()
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{
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_rb.velocity = new Vector2(0f, _rb.velocity.y);
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}
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/// <summary>
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/// 向目标位置抖跃（抛物线累加填充）。
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/// 计算初速使尔子到达目标，用 Impulse 施加力。
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/// </summary>
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public void JumpToTarget(Vector2 target)
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{
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if (_rb == null) return;
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Vector2 delta = target - (Vector2)transform.position;
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float gravMag = Mathf.Abs(Physics2D.gravity.y * _rb.gravityScale);
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float timeAloft = Mathf.Max(0.1f, delta.x != 0f
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? Mathf.Abs(delta.x) / _config.RunSpeed
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: 0.5f);
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float vy = (delta.y - 0.5f * (-gravMag) * timeAloft * timeAloft) / timeAloft;
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float vx = delta.x / timeAloft;
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_rb.velocity = new Vector2(vx, vy);
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UpdateFacing(vx);
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}
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private void UpdateFacing(float dir)
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{
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if (Mathf.Approximately(dir, 0f)) return;
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int newDir = dir > 0f ? 1 : -1;
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if (newDir == _facingDir) return;
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_facingDir = newDir;
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if (_spriteRenderer != null)
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{
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_spriteRenderer.flipX = newDir < 0;
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}
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else
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{
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// SpriteRenderer 未绑定时通过 localScale 翻转朝向
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Vector3 s = transform.localScale;
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transform.localScale = new Vector3(Mathf.Abs(s.x) * newDir, s.y, s.z);
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}
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}
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}
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}
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