Unityscript object rotating while jumping

Unity Engine
1

Hey guys,

I’ve recently come back to Unity and have been playing with the tools a little bit. Today, I created a new project and put in the following:

  1. A new cube (represents the player / jumping and falling object)
  2. A new cube which I flattened (represents the floor)

The two cubes have the default box colliders without the trigger checked.
The first cube (the player) has a rigidbody that does use gravity.

Right now everything works fine, my camera follows my cube, and I can move my cube with my arrow keys.
Additionally my cube does not fall through the floor :slight_smile:

However, I wanted to introduce a jumping component to my cube.
When I did this, the object was rotating in the air and after some debugging I realized that this is because the force from the translation is still being applied. To try and fix this, I added a “canMove” boolean so that the object wouldn’t move (rotate) in the air - but now the object moves on the first jump and then stops moving completely. (Probably because I have never set canMove back to true).

Anyways, here is my code:

/
* move.js */

var moveSpeed : float = 5.0;

var jumpAmount : float = 200.0; 

var jumpTIme = 1.0;
var nextJump = 0.0;

var canMove : boolean = true;

function Update( ) {

   if (Input.GetAxis ("Jump")) {
      if (Time.time > nextJump) {
         rigidbody.AddForce(0, jumpAmount, 0);
         nextJump = Time.time + jumpTime;
         canMove = false;
      }
   }

    if(canMove) {
    	var z =  moveSpeed * Input.GetAxis("Vertical") * Time.deltaTime; 
    	transform.Translate(0, 0, z);
    }

}

function OnTriggerEnter(otherObject : Collider) {
	canMove = true;
}

What is a better way to doing this? I think I read somewhere that transform.Translate should not be used with rigidbodies or something (I forget).

Thanks for all your help,
Bucco

2

You need to think about your input types
for moving, you would use Input.GetAxis, because moving is something that happens constantly (you move forward as long as you hold it)
for jumping, you only want the jump to happen once when the user presses the jump button
Read and re-read the docs