Need to control a 2D character to jump only once

[Megazero]

I’m pretty new to Unity so I want to ask something. I try to use the javascript to allow the character to jump only once, here’s my code

private var CheckOnGround:boolean = false;


function Update () 
{
	if (Input.GetKeyDown("space") && CheckOnGround == true)
	{
		Jump();
		CheckOnGround = false;
	}

}

public var JumpSpeed:float = 100.0f;

function Jump()
{
	CheckOnGround = false;
    rigidbody2D.AddForce(Vector2.up *JumpSpeed);
}

function OnCollisionEnter2D(coll: Collision2D) {
	if(coll.gameObject.tag == "Ground")
	{
		CheckOnGround = true;
	}
	
	
}

So it should have turn the value of CheckOnGround to false whenever the character is in the air, but for some reason when I test it the character are able to double jump instead, only after the 2nd jump that it cant jump anymore. Any help on this?

[SunriseKingdom]

Hi, Maybe this code will help you.

var jump : boolean = true; //true = Player can Jump, false = Player can't Jump
var jumpspeed : int = 8; //This is how high you can jump


function Update () {

if (Input.GetKey (KeyCode.UpArrow))  
{
if (jump == true) 
{
rigidbody2D.velocity.y = jumpspeed;
jump = false;
}

}

}


function OnCollisionEnter2D(other : Collision2D)
{

if(other.gameObject.tag == "Ground") 
{
jump = true;
}

}

Give your land a tag name Ground

Hope this help.

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[7bajwa]

its working fine but i have to press the key two times to jump after landing.

void Update () {
	if (Input.GetKeyDown (KeyCode.A)) {
		if (jump == true) {
			rigid.AddForce (new Vector2 (0, power));
			jump = false;
		} else {
			jump = true;
		}
	}
}
void OnCollisionEnter2d(Collision2D other){
	if (other.gameObject.tag == "Finish") {
		jump = false;
	}
}

[MagoPunk]

Hi,

My first time here. Let’s see how it goes

My character jumps once controlling if he’s touching “ground”. It works from the floor.

I have more platforms above and they are also “ground” because I want to jump from them as well.

BUT when I jump from the floor bellow and touch the platforms above with the character’s head, he can jump again even if he’s still not touching the floor.

Any advice?

Thanks!