Untiy3d controls scene screenshots through external JSON files

{
"SceneName":"PrintScreen",
"Position":{"x":0,"y":10,"z":20},
"Rotation":{"x":0,"y":0,"z":0},
"ScreenWidth":1024,
"ScreenHeight":768,
"ImageName":"Test01.png",
"OutPath":"C://OutPath"
}

It's on it Json File data , Through the data above , Let's control the capture of a partial picture of a scene , The above parameters are ：

SceneName： Scene name

Position： Camera position

Rotation ： The camera faces

ScreenWidth： Picture width

ScreenHight： Picture height

ImageName： The name of the picture

OutPath： Where the picture is saved

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.SceneManagement;

[Serializable]
public class ListRot
{
    public float x;
    public float y;
    public float z;
}

public class JsonManage
{
    public string SceneName;
    public ListRot Position;
    public ListRot Rotation;
    public int ScreenWidth;
    public int ScreenHeight;
    public string ImageName;
    public string OutPath;

}

public class PrintScreen : MonoBehaviour
{
    private Camera camera;
    private Rect rect;
    JsonManage jm;

    AsyncOperation async;
    int num ;

    void Start()
    {
        num = 0;

        camera = Camera.main;
        // Read json Information 
        jm = JsonUtility.FromJson<JsonManage>(File.ReadAllText("C:\\PrintScreen.json"));

        // parameter assignment 
        camera.transform.position = new Vector3(jm.Position.x, jm.Position.y, jm.Position.z);
        camera.transform.eulerAngles = new Vector3(jm.Rotation.x, jm.Rotation.y, jm.Rotation.z);
        rect.width = jm.ScreenWidth;
        rect.height = jm.ScreenHeight;
        

        // Jump to the scene and keep Camera object 
        DontDestroyOnLoad(this);
        async = SceneManager.LoadSceneAsync(jm.SceneName);
        
    }
    private void Update()
    {
       // Judge whether the scene jump is successful , Screenshot once 
        if (async.isDone && num == 0)
        {
            num++;
            Capture3();
        }
    }

    //private void OnGUI()
    //{
    //    if(GUI.Button(new Rect(10, 10, 100, 50), " Screenshot "))
    //    {
    //        print(" Start screenshot ");
    //        Capture3();
    //    }
    //}

    public Texture2D Capture3()
    {
        //  Create a RenderTexture object     
        RenderTexture rt = new RenderTexture((int)rect.width, (int)rect.height, 0);
        //  Temporarily set the of the relevant camera targetTexture by rt,  And manually render the relevant camera     
        camera.targetTexture = rt;
        camera.Render();
        //ps: ---  If you add a second camera , You can only take a screenshot of the image seen by several specified Cameras .    
        //ps: camera2.targetTexture = rt;    
        //ps: camera2.Render();    
        //ps: -------------------------------------------------------------------    

        //  Activate this rt,  And read pixels from it .    
        RenderTexture.active = rt;
        Texture2D screenShot = new Texture2D((int)rect.width, (int)rect.height, TextureFormat.RGB24, false);
        screenShot.ReadPixels(rect, 0, 0);//  notes ： This is the time , It's from RenderTexture.active Read the picture in the middle school     
        screenShot.Apply();

        //  Reset relevant parameters , To use the camera Continue to display... On the screen     
        camera.targetTexture = null;
        //ps: camera2.targetTexture = null;    
        RenderTexture.active = null; // JC: added to avoid errors    
        GameObject.Destroy(rt);

        //  Finally, these texture data , Become a png Picture file     
        byte[] bytes = screenShot.EncodeToPNG();

        // Automatically create a folder when it does not exist 
        if (!Directory.Exists(jm.OutPath))
        {
            Directory.CreateDirectory(jm.OutPath);
        }
        //string filename = Application.dataPath + "/Screenshot3.png";

        string filename = jm.OutPath + @"/" + jm.ImageName +".png";
        System.IO.File.WriteAllBytes(filename, bytes);
        //AssetDatabase.Refresh();
        Debug.Log(string.Format(" Screenshot of a picture : {0}", filename));

        return screenShot;
    }
}  

Operation method ：

1、 Write well Json Files in C Under the plate （ In this case Json The document is placed in "C:\\PrintScreen.json"）

2、 Create an empty scene and hang this script on MainCamera On

3、 Create another scene that needs a screenshot , The scene name needs to be followed by Json The first parameter of the file is consistent （ When running, it is necessary to ensure that all scenarios are added BuildSettings in ）

4、 Run to get a screenshot , Save in the specified location （ The screenshot of this case is saved in C:\OutPath）

This case can control the screenshot of any scene , Just need to be outside Json Just modify it in the file ,capture3() The screenshot code comes from the network , Thank you for your sharing .