74 lines
2.1 KiB
C#
74 lines
2.1 KiB
C#
using UnityEngine;
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using UnityEngine.UI;
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public class EnemyHealthBar : MonoBehaviour
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{
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[Header("UI設定")]
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[SerializeField] private Slider hpSlider;
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[SerializeField] private EnemyHealth targetEnemyHealth;
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[Header("追従設定")]
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[Tooltip("敵の原点から頭上へどれだけ浮かせるか（メートル）")]
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[SerializeField] private Vector3 offset = new Vector3(0, 2.0f, 0);
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private Transform targetTransform;
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private Transform mainCameraTransform;
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private void Start()
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{
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// ターゲットのEnemyHealthを自動検索
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if (targetEnemyHealth == null)
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{
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targetEnemyHealth = GetComponentInParent<EnemyHealth>();
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}
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if (targetEnemyHealth != null)
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{
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targetTransform = targetEnemyHealth.transform;
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targetEnemyHealth.OnHealthChanged += UpdateHp;
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targetEnemyHealth.OnDeath += HandleDeath;
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UpdateHp(targetEnemyHealth.CurrentHealth, targetEnemyHealth.MaxHealth);
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}
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if (Camera.main != null)
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{
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mainCameraTransform = Camera.main.transform;
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}
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}
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private void OnDestroy()
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{
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if (targetEnemyHealth != null)
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{
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targetEnemyHealth.OnHealthChanged -= UpdateHp;
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targetEnemyHealth.OnDeath -= HandleDeath;
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}
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}
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private void LateUpdate()
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{
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if (targetTransform == null || mainCameraTransform == null) return;
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// 1. 敵の頭上に位置を追従
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transform.position = targetTransform.position + offset;
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// 2. 常にカメラの向きへ正対（ビルボード処理：鏡像反転を防ぐためカメラの向きと平行にする）
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transform.forward = mainCameraTransform.forward;
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}
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private void UpdateHp(float current, float max)
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{
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if (hpSlider != null)
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{
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hpSlider.maxValue = max;
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hpSlider.value = current;
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}
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}
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private void HandleDeath()
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{
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// 敵が死んだらバーを即座に非表示
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gameObject.SetActive(false);
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}
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} |