Unity4.3のRigidBody2DでKinematicがONだと、トリガー系に反応しなくなるバグ回避用

NonKinematic2D.cs

using UnityEngine;
using System.Collections;

/// <summary>
/// Unity4.3のRigidBody2DでKinematicがONだと、トリガー系に反応しなくなるバグ回避用
/// このスクリプトが有効な間、KinematicがOFFでも強制的に物理移動しなくする
/// </summary>
[RequireComponent (typeof(Rigidbody2D))]
public class NonKinematic2D : MonoBehaviour
{
    Transform myTransform;
    Rigidbody2D myRigidBody2D;
    Vector3 fixedPosition;
    float orgGravityScale;

    void Awake ()
    {
        #if !UNITY_4_3
        // 4.3以降は直っているので使わない
        rigidbody2D.isKinematic = true;
        enabled = false;
        return;
        #endif
        
        myRigidBody2D = rigidbody2D;
        myRigidBody2D.isKinematic = false;
        myTransform = transform;
        fixedPosition = myTransform.localPosition;
    }

    void Update ()
    {
        myRigidBody2D.velocity = Vector3.zero;
        myRigidBody2D.angularVelocity = 0;
        myTransform.localPosition = fixedPosition;
    }

    void OnEnable ()
    {
        orgGravityScale = myRigidBody2D.gravityScale;
        myRigidBody2D.gravityScale = 0f;
    }

    void OnDisable ()
    {
        myRigidBody2D.gravityScale = orgGravityScale;
    }
}