如何在全局范围内设置球体的半径？

using UnityEngine;

public class SphereController : MonoBehaviour
{
    public float radius = 1.0f; // 设置球体的初始半径

    void Start()
    {
        // 获取球体的Mesh组件
        MeshFilter meshFilter = GetComponent<MeshFilter>();
        if (meshFilter != null)
        {
            // 获取球体的Mesh对象
            Mesh mesh = meshFilter.mesh;
            // 缩放球体的顶点坐标，实现半径的调整
            Vector3[] vertices = mesh.vertices;
            for (int i = 0; i < vertices.Length; i++)
            {
                vertices[i] *= radius;
            }
            // 更新球体的Mesh对象
            mesh.vertices = vertices;
            mesh.RecalculateBounds();
        }
    }
}