Restraining movement to camera bounds

Questions & Answers
1

I’m working at a horizontal 2d star shooter,and i need a way to make the player dont leave the camera(orthographic) bounds,in my game the camera moves automatic,with a scrolling background and some triggers parented,the enemy remain static in the scene and when the trigger touch then,they start doing what their supposed,but everything is a mess,i need a cleaner solution,like one big trigger that active everything it touch and destroy when the object leave it bounds and a way to make the player dont leave the current camera bounds

2

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

public class PlayerMovement : MonoBehaviour {
    
    float playerRadiusBox = 0.5f;

	// Use this for initialization
	void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {

        // Restrict to cam boundry
        Vector3 pos = transform.position;

        if (pos.y + playerRadiusBox > Camera.main.orthographicSize) {
            pos.y = Camera.main.orthographicSize - playerRadiusBox ;
        }
        if (pos.y - playerRadiusBox < -Camera.main.orthographicSize) {
            pos.y = -Camera.main.orthographicSize + playerRadiusBox ;
        }

        float screenRatio = (float)Screen.width / (float)Screen.height;
        float widthOrtho = Camera.main.orthographicSize * screenRatio;

        if (pos.x + playerRadiusBox > widthOrtho) {
            pos.x = widthOrtho - playerRadiusBox ;
        }
        if (pos.x - playerRadiusBox < -widthOrtho) {
            pos.x = -widthOrtho + playerRadiusBox ;
        }

        transform.position = pos;
	}
}

Add in your movement code to this script attach to player, it will keep the player in the camera bounds.