How to record moves and then play them frame by frame after a button is clicked?

Question

I'm trying to record the functions that have been called, and play them frame by frame after a button is clicked.

For example, I have four buttons here (the triangles) to control my player's movements.

alt text

 public void MoveRight() {

     float x = playerRb.transform.position.x;
     float y = playerRb.transform.position.y;
     playerRb.transform.position = new Vector3(x + 1, y, playerRb.transform.position.z);
 }

 public void MoveLeft() {

     float x = playerRb.transform.position.x;
     float y = playerRb.transform.position.y;
     playerRb.transform.position = new Vector3(x - 1, y, playerRb.transform.position.z);
 }

 public void MoveUp() {

     float x = playerRb.transform.position.x;
     float y = playerRb.transform.position.y;
     playerRb.transform.position = new Vector3(x, y + 1, playerRb.transform.position.z);
 }

 public void MoveDown() {

     float x = playerRb.transform.position.x;
     float y = playerRb.transform.position.y;
     playerRb.transform.position = new Vector3(x, y - 1, playerRb.transform.position.z);
 }

Is there a way to record the order of buttons that I have clicked, and then call those functions after the confirm button is clicked?

Answer 1

Simple way is probably just to keep a list of all the past moves that gets added to each time the player moves, then read that list out (here I'm using a list of strings, but no reason it couldn't be a number or Enum)

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class MoveScript : MonoBehaviour
 {
     public Rigidbody playerRb;
     
     public List<string> moves = new List<string>(){};
     
     
     public void MoveRight() 
     {
         float x = playerRb.transform.position.x;
         float y = playerRb.transform.position.y;
         playerRb.transform.position = new Vector3(x + 1, y, playerRb.transform.position.z);
         moves.Add("R");
     }
     
     public void MoveLeft() 
     {
         float x = playerRb.transform.position.x;
         float y = playerRb.transform.position.y;
         playerRb.transform.position = new Vector3(x - 1, y, playerRb.transform.position.z);
         moves.Add("L");
     }
     public void MoveUp() 
     {
         float x = playerRb.transform.position.x;
         float y = playerRb.transform.position.y;
         playerRb.transform.position = new Vector3(x, y + 1, playerRb.transform.position.z);
         moves.Add("U");
     }
     
     public void MoveDown() 
     {
         float x = playerRb.transform.position.x;
         float y = playerRb.transform.position.y;
         playerRb.transform.position = new Vector3(x, y - 1, playerRb.transform.position.z);
         moves.Add("D");
     }
 }

⠀

Then once the player hits Play, just go through each item in the list and play it back, probably using a Coroutine so that you can wait between moves. (Here I've also added a boolean that makes sure the moves aren't added in "Playback mode"). In theory you'd just need the button to run "PlayButton" on press, though that will depend on your implementation.

⠀

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class MoveScript : MonoBehaviour
 {
     public Rigidbody playerRb;
     
     public List<string> moves = new List<string>(){};
     public bool playbackMode = false;
     
     
     public void MoveRight() 
     {
         float x = playerRb.transform.position.x;
         float y = playerRb.transform.position.y;
         playerRb.transform.position = new Vector3(x + 1, y, playerRb.transform.position.z);
         if(!playbackMode) moves.Add("R");
     }
     
     public void MoveLeft() 
     {
         float x = playerRb.transform.position.x;
         float y = playerRb.transform.position.y;
         playerRb.transform.position = new Vector3(x - 1, y, playerRb.transform.position.z);
         if(!playbackMode) moves.Add("L");
     }
     public void MoveUp() 
     {
         float x = playerRb.transform.position.x;
         float y = playerRb.transform.position.y;
         playerRb.transform.position = new Vector3(x, y + 1, playerRb.transform.position.z);
         if(!playbackMode) moves.Add("U");
     }
     
     public void MoveDown() 
     {
         float x = playerRb.transform.position.x;
         float y = playerRb.transform.position.y;
         playerRb.transform.position = new Vector3(x, y - 1, playerRb.transform.position.z);
         if(!playbackMode) moves.Add("D");
     }
     
     public void PlayButton()
     {
         StartCoroutine(PlayMoves());
     }
     
     IEnumerator PlayMoves()
     {
         playbackMode = true;
         foreach (string moveItem in moves)
         {
             if(moveItem == "L") MoveLeft();
             else if(moveItem == "R") MoveRight();
             else if(moveItem == "U") MoveUp();
             else if(moveItem == "D") MoveDown();
             
             yield return new WaitForSeconds(0.5f);
         }
         playbackMode = false;
     }
     
 }

How to record moves and then play them frame by frame after a button is clicked?

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