Failed to create agent because it is not close enough to the NavMesh

主要原因是：两个相同对象navmesh点太近造成。

解决方案：通过NavMesh.SamplePosition 获得可以行走点

for(int i = ;i<;i++)

        {

            float fRadius = Random.Range(, mRadius);

            float fAngle = Random.Range(, 3.14f);

            Vector3 v3 = mStartPos;

            v3.x += Mathf.Sin(fAngle) * fRadius;

            v3.z += Mathf.Cos(fAngle) * fRadius;

            NavMeshHit hit;

            if(NavMesh.SamplePosition(v3, out hit, mRadius, ))

            {

                GameObject p = Instantiate<GameObject>(mCat, hit.position, Quaternion.identity, transform);

                if (p != null)

                {

                    NavMeshAgent agent = p.AddComponent<NavMeshAgent>();

                    if(agent!=null)

                    {

                        agent.speed = 5.0f;

                    }

                    mCatList.Add(p);

                }

            }

        }