HELP!! Rigid Body Jumping Gravity Issue

Question

Hey guys. I'm new to Unity, and more so with coding. I'm making a 2D game and I'm having a bit of trouble with the jumping mechanics.

Initially I used the character preset asset package to control my character, but there was an annoying pill collider in it which didn't work well with this 2D style platformer. So I researched a little and made a code that allows me to control my character without a character controller, and rather a rigid body.

Here is the code:

 #pragma strict
 
 var speed : int = 5;
 var isgrounded : boolean = true;
 
 function Start () {
 
 }
 
 function Update () {
 
     if(Input.GetAxis("Horizontal")){
         transform.Translate(Vector3(Input.GetAxis("Horizontal") * speed * Time.deltaTime, 0, 0));
     }
     
     if(Input.GetKeyDown("space") && isgrounded == true){
         rigidbody.AddForce(Vector3.up * 500);
     }
 }

Here is a video showing what it does (white background). The blue background is what I WANT the character to jump like. I would go on with using that blue-background-code, but the pill collision on that character controller doesn't work well with what I'm trying to make.

http://www.youtube.com/watch?v=h3L30zcculE&feature=youtu.be

So does anybody know how to tweak the gravity in unity to make the character not only jump up faster, but land fast as well?

I have tried edit > project settings > Input (because there was a gravity option)

I have tried edit > project settings > Physics

The gravity options there don't make the character jump like shown in the blue background example in the youtube video above. So I was wondering if there was a code I could use on a rigid body to modify gravity. Any help would be greatly appreciated.

!!![[[BONUS HELP]]]!!!

As you can see in the video, the character slides around if the jump key ("space") is held down. I don't understand raycasting yet, but I hear that's a way to fix it, to detect that the character has hit the ground. If someone can explain that, or show me a code that works, I'd be very happy.

&

As you can see from the video, if the jump key is continually tapped, the character floats around like kirby, but limitlessly. I would be fine with a double jump, but not an infinite one. How do I limit the amount of times pressing jump takes any effect?

Answer 1

Answer by Crystalline · Oct 25, 2013 at 08:57 AM

Just: If not jumping and not grounded add a negative force. Attach this script to your rigidbody.

 #pragma strict
 var distToGround: float;
 
 function Start () {
      distToGround = collider.bounds.extents.y;
 }
 
 function IsGrounded(): boolean     
 {
   return Physics.Raycast(transform.position, -Vector3.up, distToGround + 0.1);
 }
 
 function FixedUpdate () {
  
 if (IsGrounded())
     {
         // JUMPING 
         if (Input.GetKey(KeyCode.Space))
         {
             transform.rigidbody.AddForce(transform.up* 500);
         }
     
     
 else
         {
             transform.rigidbody.AddForce(transform.up* -500);
         }        
     
     }
 }

Add comment · Show 3 · Share

Tekksin · Oct 25, 2013 at 09:53 AM 0

Share

how is unity supposed to know what grounded is?

At the moment, that script makes my character fly away.. I guess my question should be how do I really tell unity that my character is on the ground so that it knows how to respond to these triggers..

Crystalline · Oct 25, 2013 at 12:01 PM 0

Share

Try that script, attach it to your player rigidbody.

Tekksin · Oct 25, 2013 at 04:47 PM 0

Share

you can't put a script on rigid body, though....the player holds that attribute so the script has to be on the player, right?

alt text

player.png (129.1 kB)

HELP!! Rigid Body Jumping Gravity Issue

1 Reply

Your answer

Follow this Question

Related Questions