Stopping my player from moving when hitting a wall.

Question

Simple question, but really couldn't find the answer to.

I just want my player to stop moving once it $$anonymous$$ts wall. What I tried was adding both a Box Collider and a Rigidbody on both objects. Instead of the wall stopping the player from moving, the wall just gets pushed by the player. I tried increasing the mass of the wall but now my player is getting bounced back by the wall, or sometimes the player goes right through the wall. I've tried adjusting the numbers of both objects in several different ways and both of them just keeps going crazy and flipping out around the map.

Is there a simple way of making t$$anonymous$$s without any of the unintended complicated physics stuff happening?

Just a simple 'stop', no sliding bouncing friction complex physics or anyt$$anonymous$$ng.

Oh and t$$anonymous$$s is for a Top-Down 3D game.

Thanks! :)

Answer 1

Answer by yashpal · Oct 25, 2014 at 06:09 AM

Hello Leroterr

You don't need to increase mass. Just add rigidbody to your player and collider. and add collider to wall. and put script on player w$$anonymous$$ch detects collision and perform action using that.

//T$$anonymous$$s is for 3D game in C#

 void OnCollisionEnter(Collision collision) 
 {
         if(collision.gameObject.name == "YourWallName")  // or if(gameObject.CompareTag("YourWallTag"))
         {
                     rigidbody.velocity = Vector3.zero;
         }
 }

OnCollisionEnter doc

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Leroterr · Oct 25, 2014 at 06:37 AM 0

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My player starts to get "fidgety/jittery" or "shaky" once it hits the wall and me still pressing the forward button. It's like it's still forcing itself to go through the wall (I am, but I don't want the character to act jittery while doing it), then bouncing back a little, then going in again.

I'm also using transform.translate to move my player.

yashpal · Oct 25, 2014 at 09:19 AM 0

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@bubzy just show current way to solve this problem. i think You don't want your walls are moving (means it's static). and jittery effect. you just want to isKinematic in rigidboady. or don't need to add rigidbody it walls.

spooneystone · Mar 04, 2022 at 12:07 AM 0

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This is a good way to do it! although i have found it works a lot better when using raycasts, boxcasts e.t.c.

Answer 2

Answer by r3flx · Dec 13, 2017 at 11:12 AM

A surprising good method is actually moving your move script to a FixedUpdate and using rigidbody.position.

try t$$anonymous$$s

 void FixedUpdate()
 {
     float x = Input.GetAxisRaw("Horizontal");
     float z = Input.GetAxisRaw("Vertical");

     playerRb.position += z * transform.forward * Time.deltaTime * speed;
     playerRb.position += x * transform.right * Time.deltaTime * speed;
 }

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PlatPlayz · Jan 14, 2018 at 08:47 AM 0

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Moving it to FixedUpdate really helped! Thanks a lot!

epicpython · Mar 03, 2022 at 07:59 PM 0

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As of 2022, FixedUpdate helped! Thanks so much!

Answer 3

Answer by JoshDangIt · Jun 23, 2016 at 08:23 PM

Make the wall's rigidbody Kinematic. Then make sure the player's collider doesn't have a bouncy PhysicsMaterial.

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Answer 4

Answer by Maginix · Jun 24, 2016 at 05:01 AM

 it works perfectly :)
 
 void LateUpdate()
     {
         //fix flying if is blocked on jump
         if(charController.velocity.y == 0)
         {
             moveDirectionSmoothly.y = charController.velocity.y;
         }
             
         //fix "walk stopped" (stop the character if it is blocked by a wall)
         if(charController.velocity.z == 0)
         {
             moveDirectionSmoothly.z = charController.velocity.z;
         }
     }

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Answer 5

Answer by Pathojen · Mar 23, 2019 at 07:50 PM

I have the same question, only with a 2D object. Any advice? Thanks in advance.

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Llama_w_2Ls · Jul 20, 2020 at 03:09 PM 0

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@Pathojen you could add some drag. This way, when the rigidbody 2D hits the wall, it may bounce back but its velocity is dramatically reduced over time until it comes to a stop.

epicpython · Mar 03, 2022 at 08:24 PM 0

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 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Player : MonoBehaviour
 {
     float speed = 4f;
     Vector3 moveLeft = new Vector3(-1, 0, 0);
     Vector3 moveRight = new Vector3(1, 0, 0);
     Vector3 moveUp = new Vector3(0, 1, 0);
     Vector3 moveDown = new Vector3(0, -1, 0);
 
     void FixedUpdate()
     {
         if (Input.GetKey(KeyCode.LeftArrow))
         {
             transform.position += moveLeft * Time.deltaTime * speed; //x,y,z
         }
 //add code for moving right, up, down 
 }

}

FixedUpdate worked for me in 2D. I gave the player a Rigidbody2D and CircleCollider2D. I gave the wall a BoxCollider2D. The player collider HAS to be a CircleCollider2D (not BoxCollider2D) with this code, or you get a weird glitch where the player can get caught on the corner of the wall and rotate. The other way to fix the glitch is to use a BoxCollider and check "Freeze Rotation Z"

Stopping my player from moving when hitting a wall.

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