How to change the position for gravity?

Question

I am creating a 3D game where the player can push a button, and "position" of gravity will be shifted. To make it any clearer, if I press T in the game, all objects and including the character will move upwards because gravity has been re-positioned so that the ceiling is now the new floor or the level. Same thing with the walls. This is what I have been using so far but it isn't workng:

 private void Start()
 {
       ...
      Physics.gravity = new Vector3(0, -1.0f, 0);
 }
 
 private void InputManager()
 {
      if (Input.GetKeyDown("T"))
      {
            Physics.gravity = new Vector3(0, 1.0f, 0);
      }
 }

Is there another function I should be using or is the solution more complicated than this? The camera isn't an issue by the way.

Answer 1

Best Answer

Answer by Nikunj-Kareliya · Sep 16, 2015 at 07:48 PM

Try this sample code :

 using UnityEngine;
 using System.Collections;
 
 public class ChangeGravity : MonoBehaviour {
 
     // Use this for initialization
     void Start () {
         Physics.gravity = new Vector3(0, -1, 0);
         GetComponent<Rigidbody> ().drag = .5f;
     }
     
     // Update is called once per frame
     void Update () {
     
         if(Input.GetKeyUp(KeyCode.UpArrow)) {
             Physics.gravity = Vector3.up * 5;
         }
         else if(Input.GetKeyUp(KeyCode.DownArrow)) {
             Physics.gravity = Vector3.down * 5;
         }
 
 
     }
 }

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SirWaffleGamin · Sep 18, 2015 at 06:02 PM 0

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But then how would I apply this to a specific object? Is it the same as linking the object in the editor to the specific code, or do I have to link this script to the script of my character?

Nikunj-Kareliya SirWaffleGamin · Sep 19, 2015 at 05:26 AM 0

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It's sample code for your requirement. $$anonymous$$ake a new scene, create any 3d object, add Rigidbody then drag this script on that object. $$anonymous$$ake sure, you changed default gravity to (0, 0, 0) in Projects Settings > Physics.

This is just for a test. $$anonymous$$odify it as per your need.

SirWaffleGamin Nikunj-Kareliya · Sep 21, 2015 at 06:05 PM 0

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Thank you very much!

DiegoSLTS · Sep 18, 2015 at 06:26 PM 0

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@SirWaffleGa$$anonymous$$ Unity's physics engine applies the gravity force to every rigidbody that uses gravity (the checkbox in the rigidbody inspector). You can't make different objects to have a different gravity force unless you do all the physics by yourself.

SirWaffleGamin DiegoSLTS · Sep 21, 2015 at 06:06 PM 0

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Understood. Thanks!

How to change the position for gravity?

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