Make object fall with constant speed!

Question

Hi is there a way to make a rigidbody that has gravity to fall with a constant speed? Preferably i want to increase or decrease the speed of falling.Thanks!

Answer 1

Best Answer

Answer by ByteSheep · May 14, 2013 at 09:38 PM

Well you could either avoid using the physics engine and instead set the transform directly, or you could perhaps set the rigidbodies velocity every frame.

Moving object position using transform:

 function Update() {
 
    transform.position -= transform.up * Time.deltaTime * 5;
 }

Moving object by directly influencing the rigidbodys' velocity every frame:

 function Update() {
 
    rigidbody.velocity = Vector3(0, -5, 0);
 }

rigidbody.velocity

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Answer 2

Answer by TheDarkVoid · May 14, 2013 at 10:33 PM

You can set the rigidbody to Kinematic and use the transform to move the rigidbody around.

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Answer 3

Wiki

Answer by create3dgames · May 14, 2013 at 09:52 PM

You could use a transform.position.y and subtract from it every frame.

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gharbill · May 14, 2013 at 10:24 PM 0

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then it would not be constant as it would depend on Time.deltaTime which changes every frame

Answer 4

For all of you looking for a way, check the code below

 using UnityEngine;

 public class Glider : MonoBehaviour
 {
     /// <summary>
     /// The speed when falling
     /// </summary>
     [SerializeField]
     private float m_FallSpeed = 0f;
 
     /// <summary>
     /// 
     /// </summary>
     private Rigidbody2D m_Rigidbody2D = null;
 
     // Awake is called before Start function
     void Awake()
     {
         m_Rigidbody2D = GetComponent<Rigidbody2D>();
     }
 
     // Update is called once per frame
     void Update()
     {
         if (IsGliding && m_Rigidbody2D.velocity.y < 0f && Mathf.Abs(m_Rigidbody2D.velocity.y) > m_FallSpeed)
             m_Rigidbody2D.velocity = new Vector2(m_Rigidbody2D.velocity.x, Mathf.Sign(m_Rigidbody2D.velocity.y) * m_FallSpeed);
     }
 
     public void StartGliding()
     {
         IsGliding = true;
     }
 
     public void StopGliding()
     {
         IsGliding = false;
     }
 
     /// <summary>
     /// Flag to check if gliding
     /// </summary>
     public bool IsGliding { get; set; } = false;
 }

Then trigger the StartGliding method when you hold the jump button or whatever

Make object fall with constant speed!

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