在三维空间的圆环上均匀布点

        /// <summary>
        /// 在三维空间的圆环上均匀布点
        /// </summary>
        /// <param name="posArray">最终计算出的点位置</param>
        /// <param name="centerPos">中心点</param>
        /// <param name="count">分布的点数量</param>
        /// <param name="radius">半径</param>
        void InitPosFromCircularRing(out Vector3[] posArray, Vector3 centerPos, int count, float radius)
        {
            posArray = new Vector3[count];
            float copies = (360.0f / count) * Mathf.Deg2Rad;
            for (int i = 0, j = count; i < j; ++i)
            {
                float x = radius * Mathf.Cos(copies * i);
                //float y = centerPos.y;
                float z = radius * Mathf.Sin(copies * i);
                Vector3 vec3 = new Vector3(x, 0, z) + centerPos;
                posArray[i] = vec3;
            }
        }