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Question by Monagui · Nov 11, 2015 at 01:20 AM · unity 5playerfpsunity 2dgravity

How do you change gravity with a press of a button? Unity 2D

I want my player to be able to change gravity when I press the space bar... kinda like in this game http://www.worigame.com/gravity-shift-puzzle-game.html

Is there any code I can use.... and any other tips so that my game can be as similar as that one.

Sorry it the question is kind of confusing, english is not my first language

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Answer by Eno-Khaon · Nov 11, 2015 at 02:31 AM

For this, Physics2D.gravity is your friend.

To give an example of a simple implementation to start from, you could try something like this:

 // C#
 
 void Update()
 {
     if(Input.GetKeyDown(KeyCode.Space))
     {
         Physics2D.gravity *= -1;
     }
 }

With this bit implemented into a script, gravity will reverse by pressing spacebar (by multiplying by -1).

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avatar image GiyomuGames · Nov 11, 2015 at 02:42 AM 0
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And if you want to change the gravity on your character only you can change it on its rigidbody component by code.

 void Update()
  {
      if(Input.Get$$anonymous$$eyDown($$anonymous$$eyCode.Space))
      {
          GetComponent<RigidBody2D>().gravityScale *= -1;
      }
  }
avatar image ijidau GiyomuGames · Nov 11, 2015 at 02:45 AM 0
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I think this should be gravityScale not gravity.

avatar image GiyomuGames ijidau · Nov 11, 2015 at 05:00 AM 0
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Ah yes correct! I forgot to double check on the documentation. I have edited my message accordingly.

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Answer by Monagui · Nov 11, 2015 at 01:23 PM

Thanks! I ended up doing using this code in case anyone needs it, thanks again :D

 using UnityEngine;
 using System.Collections;
 
 public class NewBehaviourScript : MonoBehaviour {
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update()
     {
         if(Input.GetKeyDown(KeyCode.Space))
         {
             Physics2D.gravity *= -1;
         }
     }
 }

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