yichael_smartbow/Assets/BowArrow/Scripts/Game/Billboard.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;

public class Billboard : MonoBehaviour
{
    public TextMeshProUGUI speedText;
    
    static Billboard ins;

    void Awake() {
        ins = this;   
    }
    
    /**speed m/s */
    public static void ShowSpeed(float speed) {
        //转km/h
        speed = speed * 3600f / 1000f;
        speed = (float)System.Math.Round((double)speed, 1);
        if (ins && ins.speedText) {
            ins.speedText.text = speed.ToString();
        }
    }
}