How to Set Max Numbers for a password

Questions & Answers
1

So here is my problem. I have a working GUI Keypad script. When I input the password it opens the doors as it is supposed to. However I have a slight snag. If the player inputs the incorrect password or enters more numbers than the password then it just keeps going infinately. So how do I set it up so that they can enter only a maximum of 4 numbers(Which is the password length) and so that if the number doesn’t match it resets? I pasted my code below so ya’ll can see it.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityStandardAssets.Characters.FirstPerson;

public class KeyPad : MonoBehaviour
{
    public string curPassword = "1512";
    public string input;
    public bool onTrigger;
    public bool doorOpen;
    public bool keypadScreen;
    public Transform player;

    void OnTriggerEnter(Collider other)
    {
        onTrigger = true;
    }

    void OnTriggerExit(Collider other)
    {
        onTrigger = false;
        keypadScreen = false;
        input = "";
    }

    void Update()
    {
        if (input == curPassword)
        {
            stonedoor1.close_1 = false;
            stonedoor2.close_2 = false;
            doorOpen = true;
            Cursor.lockState = CursorLockMode.Locked;
            Cursor.visible = false;
            player.GetComponent<FirstPersonController>().enabled = true;
        }
        
    }

    void OnGUI()
    {
        if (!doorOpen)
        {
            if (onTrigger)
            {
                GUI.Box(new Rect(0, 0, 200, 25), "Press 'E' to open keypad");

                if (Input.GetKeyDown(KeyCode.E))
                {
                    keypadScreen = true;
                    onTrigger = false;
                }
            }
            if (keypadScreen)
            {
                Cursor.lockState = CursorLockMode.None;
                Cursor.visible = true;
                player.GetComponent<FirstPersonController>().enabled = false;
            }


            if (keypadScreen)
            {

                GUI.Box(new Rect(0, 0, 320, 455), "");
                GUI.Box(new Rect(5, 5, 310, 25), input);

                if (GUI.Button(new Rect(5, 35, 100, 100), "1"))
                {
                    input = input + "1";
                }

                if (GUI.Button(new Rect(110, 35, 100, 100), "2"))
                {
                    input = input + "2";
                }

                if (GUI.Button(new Rect(215, 35, 100, 100), "3"))
                {
                    input = input + "3";
                }

                if (GUI.Button(new Rect(5, 140, 100, 100), "4"))
                {
                    input = input + "4";
                }

                if (GUI.Button(new Rect(110, 140, 100, 100), "5"))
                {
                    input = input + "5";
                }

                if (GUI.Button(new Rect(215, 140, 100, 100), "6"))
                {
                    input = input + "6";
                }

                if (GUI.Button(new Rect(5, 245, 100, 100), "7"))
                {
                    input = input + "7";
                }

                if (GUI.Button(new Rect(110, 245, 100, 100), "8"))
                {
                    input = input + "8";
                }

                if (GUI.Button(new Rect(215, 245, 100, 100), "9"))
                {
                    input = input + "9";
                }

                if (GUI.Button(new Rect(110, 350, 100, 100), "0"))
                {
                    input = input + "0";
                }
            }
        }
    }
}
2

Hi @Adoyser

You should be able to place a if statement in Update to check if the string is greater than 4 characters.

if (input == curPassword) {
    // Correct Password has been entered. Proceed
} else if (input.Length >= 3) {
    // Incorrect password has been entered & input length is over 3  characters.
}
3

You’l need to add a counter, which will increment every time a key is pressed. Then check the complete password, when counter == paswordLength. If that evaluates to true, open the door, if to false, reset the counter to 0, and start over.

e.g. (pseudo code)

int passwordLength = 4;
int counter = 0;
bool passwordCorrect;

while(counter <= passwordLength){

if(counter == passwordLength){
    passwordCorrect = CheckPassword();
    if(passwordCorrect){
        OpenDoor();
    }
    else
    {
        counter = 0;
    }
}
else
{
    GetNextKeyInput(int keyNumber) // keyNumber corresponds to the key position, i.e. 1 for first key, 4 for last key
   counter++// this can also be placed wherever it makes the most sense, depending on the rest of your code.
}
}

//This may also return an int rather than void. The int returned could, for example, contain the current total input (1 to 4 numbers), so you can process it as you need. Do it as it makes most sense depending on the rest of your code.
void GetNextKeyInput(int keyNumber){
}