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Copy pathTriggerCollidersTracker.cs
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55 lines (43 loc) · 1.67 KB
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using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public abstract class TriggerCollidersTracker<T> : MonoBehaviour {
public int objectsInsideCount { get { return this.collidingColliders.Count; } }
protected List<Collider> collidingColliders;
protected virtual void Start() {
this.collidingColliders = new List<Collider>();
}
protected virtual void Update() {
this.collidingColliders.BufferedForEach(c => c == null || !c.enabled || !c.gameObject.activeInHierarchy, this.MarkColliderRemoved);
}
private void OnTriggerEnter(Collider collider) {
if (collider.GetComponent<T>() == null) {
return;
}
if (!this.collidingColliders.Contains(collider)) {
this.collidingColliders.Add(collider);
if (this.collidingColliders.Count == 1) {
this.OnAtLeastOneCollider();
}
}
this.OnColliderEnter(collider);
}
private void OnTriggerExit(Collider collider) {
this.MarkColliderRemoved(collider);
}
private void MarkColliderRemoved(Collider collider) {
if (this.collidingColliders.Contains(collider)) {
this.collidingColliders.Remove(collider);
if (collider != null) {
this.OnColliderExit(collider);
}
if (this.collidingColliders.Count == 0) {
this.OnNoColliders();
}
}
}
protected virtual void OnAtLeastOneCollider() { }
protected virtual void OnNoColliders() { }
protected virtual void OnColliderEnter(Collider collider) { }
protected virtual void OnColliderExit(Collider collider) { }
}