help with on off toggle. (c#)

Question

I have it where a light turns on and off using getkeydown and two diffrent keys but I need it to do that with only one key and I know you need to use bool to do it but I'm not sure how to use bool, I've looked around and still can't figure it out. So if anyone can help that would be awesome.

Answer 1

Best Answer

Answer by Skierz · Sep 27, 2014 at 12:23 AM

If your still struggling this code should work:

  if (Input.GetKeyDown(KeyCode.E)){
             //toggle the light
             GetComponent <Light> ().enabled = ! GetComponent <Light> ().enabled;
 }

This works because you are setting GetComponent ().enabled to the opposite of what it currently is. A bool (short for Boolean) is a true or false variable. And GetComponent ().enabled is a Boolean so when called it will return it's current state. The '!' Operator just means not, so if the light was enable you are calling set the light to not true.

Sorry it's a bit wordy and the code might not be formatted well but I'm on my phone

Edit: oh and now thinking about it this probably isn't a good way of going about it as it will toggle straight back if the key is held down for more than one update so an event driven method would be better (but I'm new to unity so I'm not sure how it would be implemented)

Add comment · Show 1 · Share

krisfire · Sep 27, 2014 at 12:59 AM 0

Share

Thanks dude you just fixed the entire problem. and no it doesnt toggle back it only changes when the key is pressed. thanks again!

Answer 2

Answer by 767_2 · Sep 26, 2014 at 11:04 AM

 private bool lightBool=true;
 
  if (Input.GetKeyDown("space")){
                 if(lightBool)
                  {
                   //turn off the light
                   lighBool=!lightBool;
                   }
                else
                 {
                   //turn on the light
                   lighBool=!lightBool;
                  
                  }
                       
           }

Add comment · Show 3 · Share

DeveshPandey · Sep 26, 2014 at 11:31 AM 0

Share

No need of if else in this condition.

private bool lightBool=true;

  if (Input.GetKeyDown("space")){
      lighBool=!lightBool;
 }

767_2 · Sep 26, 2014 at 11:44 AM 0

Share

the if and else is for him to adds his light turning script that i commented and he will fill them later

krisfire · Sep 26, 2014 at 11:07 PM 0

Share

thanks for the answers but Im still not sure on how to use bool or the context its used in. if it helps heres the script I have now. // Update is called once per frame void Update () { if (Input.GetKeyDown(KeyCode.E)) //turn off the light GetComponent <Light> ().enabled = true; if (Input.GetKeyDown(KeyCode.Q)) //turn on the light GetComponent <Light> ().enabled = false; } } and probably should have said this in the original post Im still a noob at c#.

help with on off toggle. (c#)

2 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions