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Question by Der_Kevin · Oct 11, 2016 at 01:55 PM · rigidbodyrigidbody physics

Align Rigidbody on Rail?

hello! i just wanted to create a small carrera rc tack car kinda game. but i stuck at the part where the car should drive in a curve. the code looks simple as this:

 using UnityEngine;
 using System.Collections;
 
 public class Carrera : MonoBehaviour {
 
     public float accerleration;
 
     void Update () {
 
         if (Input.GetKeyUp(KeyCode.DownArrow)) {
             this.gameObject.GetComponent<Rigidbody>().AddForce(this.gameObject.transform.forward * accerleration, ForceMode.Acceleration);
 
     
         }
 
         if (Input.GetKey(KeyCode.DownArrow)) {
             this.gameObject.GetComponent<Rigidbody>().AddForce(this.gameObject.transform.forward * -accerleration, ForceMode.Acceleration);
 
         }
     
     }
 }
 

but the problem with this is that: https://gfycat.com/PlayfulThoughtfulBluejay

i somehow have to tell the rigidbody that he should rotate to the left in the curve or something like that. but how?

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avatar image doublemax · Oct 11, 2016 at 02:11 PM 0
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Try experimenting with the friction values for the wall material, so that the character can slide along.

https://docs.unity3d.com/$$anonymous$$anual/class-Physic$$anonymous$$aterial.html

avatar image Der_Kevin doublemax · Oct 11, 2016 at 02:50 PM 0
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thanks. that helps already a bit. put still the capsule wont rotate along the track https://gfycat.com/HonoredPoorInsect

avatar image conman79 · Oct 11, 2016 at 03:03 PM 0
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One way of doing this would be to cast a ray out sideways from your "rc car" and rotate it according to the surface normal of the wall.

avatar image Der_Kevin conman79 · Oct 11, 2016 at 03:11 PM 0
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hey, sounds like a good aproach. i know how to raycast stuff but not entirely sure how to check and rotate the car

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