忽略模型本身之间的碰撞

using UnityEngine;
using System.Collections;
/// <summary>
/// 忽略模型本身之间的碰撞
/// </summary>
public class IgnoreInternalCollisions : MonoBehaviour {
    void Start () {
    Collider[] colliders = gameObject.GetComponentsInChildren<Collider>();
    for (int i = 0; i < colliders.Length; ++i)
      for (int j = i + 1; j < colliders.Length; ++j)
        Physics.IgnoreCollision(colliders[i], colliders[j]);
    }
}