Unity 2d在左右运行时口吃

Question

我正在努力搞乱一分钱像素演示。

见到这里： https://www.youtube.com/watch?v=tDX2ChhntD8

可在此处下载： https://oc.unity3d.com/index.php/s/nS02rplRWJN1d6C

当我左右长距离跑步时，似乎经常口吃。这是一个视频： https://youtu.be/GFtjfI1cje8

相机的代码在这里：

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

public class CameraFollow : MonoBehaviour {
    public GameObject player;
    public Camera main_camera;

    void Update()
    {
        if (player != null)
        {
            float player_x = player.transform.position.x;
            float player_y = player.transform.position.y;

            float rounded_x = RoundToNearestPixel(player_x);
            float rounded_y = RoundToNearestPixel(player_y);

            Vector3 new_pos = new Vector3(rounded_x, rounded_y, -10.0f); // this is 2d, so my camera is that far from the screen.
            main_camera.transform.position = new_pos;
        }
    }
    public float pixelToUnits = 40f;

    public float RoundToNearestPixel(float unityUnits)
    {
        float valueInPixels = unityUnits * pixelToUnits;
        valueInPixels = Mathf.Round(valueInPixels);
        float roundedUnityUnits = valueInPixels * (1 / pixelToUnits);
        return roundedUnityUnits;
    }
}