Fixed height jumping? 2D C#

You could simply set the y velocity of your rigidbody to some constant, that would ensure the same height jump. Or set the y component of velocity to 0 and then use AddForce with some constant. If you want to do it mathematically it is a little more complicated but you only have to solve a couple of equations, google 'SUVAT equations'.

Okay, well here is my code, how would i do that would i do that? Sorry for the trouble im a bit of a noob (I just have the grounded part, but im not using it)

using UnityEngine; using System.Collections;

public class Jumping : $$anonymous$$onoBehaviour {

 // Player Jump
 public int jumpHeight;
 public bool isGrounded;

 // Update is called once per frame
 void OnCollisionStay (Collision collisionInfo)
     {
         isGrounded = true;
     }
 
 void OnCollisionExit (Collision collisionInfo)
     {
         isGrounded = false;
     }
 void CheckIfGrounded (){


 }
 void Update () {
     // Left Control
     if (Input.Get$$anonymous$$ey("up")){
         rigidbody.AddForce(new Vector3(0, jumpHeight,0));
     }
 }

}

perhaps the following:

 public int jumpHeight;
 float jumpSpeed;
 Vector3 velocity;
 
 void Start(){
     /*
     s = jumpHeight
     u = u
     v = 0
     a = Physics.gravity.y
     t = ~
     
     Equation without t is:
     
     u^2 = v^2 - 2as
     
     hence as v = 0 (we want speed to be 0 so that its at the 'top' of the jump)
     
     u = sqrt(-2as)
     */
     
     jumpSpeed = $$anonymous$$athf.Sqrt(-2*Physics.gravity.y*jumpHeight) + 0.1f;
 }
 
 void Update(){
     if(Input.Get$$anonymous$$eyDown("up")){
         velocity = rigidbody.velocity;
         velocity.y = jumpSpeed;
         rigidbody.velocity = velocity;
     }
 }

The 0.1 I added in start is just some buffer value as unity physics takes into account a few more things than SUVAT equations do, so its probably not quite right due to drag or similar. Either way it should jump the same height each time, so you can mess around with the values to get the correct 'same' height.

O$$anonymous$$G O$$anonymous$$G O$$anonymous$$G, I literally dont know how to thank you, the code is amazing, thank you soooo much. You literally dont know how happy i am right now, ive been trying to do this for ages. Thank you so much, i will definetely give you credit when i finally release my game. Thank you