64 lines
2.2 KiB
C#
64 lines
2.2 KiB
C#
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using UnityEngine;
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine.UI;
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namespace MoreMountains.Tools
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{
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/// <summary>
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/// Game object extensions
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/// </summary>
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public static class GameObjectExtensions
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{
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static List<Component> m_ComponentCache = new List<Component>();
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/// <summary>
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/// Grabs a component without allocating memory uselessly
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/// </summary>
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/// <param name="this"></param>
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/// <param name="componentType"></param>
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/// <returns></returns>
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public static Component MMGetComponentNoAlloc(this GameObject @this, System.Type componentType)
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{
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@this.GetComponents(componentType, m_ComponentCache);
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Component component = m_ComponentCache.Count > 0 ? m_ComponentCache[0] : null;
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m_ComponentCache.Clear();
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return component;
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}
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/// <summary>
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/// Grabs a component without allocating memory uselessly
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="this"></param>
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/// <returns></returns>
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public static T MMGetComponentNoAlloc<T>(this GameObject @this) where T : Component
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{
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@this.GetComponents(typeof(T), m_ComponentCache);
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Component component = m_ComponentCache.Count > 0 ? m_ComponentCache[0] : null;
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m_ComponentCache.Clear();
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return component as T;
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}
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/// <summary>
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/// Grabs a component on the object, or on its children objects, or on a parent, or adds it to the object if none were found
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/// </summary>
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/// <param name="this"></param>
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/// <typeparam name="T"></typeparam>
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/// <returns></returns>
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public static T MMGetComponentAround<T>(this GameObject @this) where T : Component
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{
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T component = @this.GetComponentInChildren<T>(true);
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if (component == null)
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{
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component = @this.GetComponentInParent<T>();
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}
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if (component == null)
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{
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component = @this.AddComponent<T>();
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}
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return component;
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}
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}
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}
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