46 lines
1.2 KiB
C#
46 lines
1.2 KiB
C#
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using System;
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using UnityEngine;
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namespace LiveOpsExamples
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{
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/// <summary>
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/// A collectible snack. Bobs gently (sine, 0.08 world units amplitude, 650 ms
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/// half-period — mirrors the Phaser yoyo tween) and raises <see cref="Collected"/>
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/// when the player overlaps its trigger, then destroys itself.
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/// </summary>
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[RequireComponent(typeof(SpriteRenderer))]
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public class Snack : MonoBehaviour
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{
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private const float BobAmplitude = 0.08f;
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private const float BobHalfPeriodSeconds = 0.65f;
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public SpriteRenderer Player { get; set; }
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public event Action<Snack> Collected;
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private Vector3 _basePosition;
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private float _elapsed;
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private void Start()
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{
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_basePosition = transform.position;
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}
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private void Update()
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{
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_elapsed += Time.deltaTime;
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var offset = Mathf.Sin(_elapsed * Mathf.PI / BobHalfPeriodSeconds) * BobAmplitude;
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transform.position = _basePosition + new Vector3(0f, offset, 0f);
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}
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private void OnTriggerEnter2D(Collider2D other)
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{
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if (Player == null || other.gameObject != Player.gameObject)
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return;
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Collected?.Invoke(this);
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Destroy(gameObject);
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}
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}
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}
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