Up and down movement via Javascript

Question

i'm designing a small game in which i need a puzzle piece to go up and down, but i can't seem to get it to work. here is the code i'm using.

var toplimit : float = 31; var botlimit : float = -31;

var goUp : float = 300;

var goDown : float = -300;

function Update () {

rigidbody.AddForce(Vector3(0,goUp,0));

if (transform.position.y < toplimit) rigidbody.AddForce(Vector3(0,goDown,0));

if (transform.position.y > botlimit) rigidbody.AddForce(Vector3(0,goUp,0)); }

can anyone see an issue? or think of a better way to do it? :)

thanks for any help

Answer 1

Answer by Ejlersen · Jan 03, 2011 at 05:28 PM

Try this:

var toplimit : float = 31; var botlimit : float = -31; var goUp : float = 300; var goDown : float = -300;

function Awake()
{
    rigidbody.AddForce(Vector3(0, goUp, 0));
}

function Update() 
{
    if (transform.position.y > toplimit)
    {
        rigidbody.velocity = Vector3.zero;
        rigidbody.AddForce(Vector3(0, goDown, 0));
    }
    if (transform.position.y < botlimit)
    {
        rigidbody.velocity = Vector3.zero;
        rigidbody.AddForce(Vector3(0, goUp, 0));
    }
}

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Puch · Jan 03, 2011 at 10:19 PM 0

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thanks so much, this worked for me!

Ejlersen · Jan 04, 2011 at 07:10 AM 0

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No problem. Just remember to mark it as answered, such that people know ;-)

Deathsummer · Feb 25, 2015 at 09:00 AM 0

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thanks!!!! worked for me :D

Answer 2

Answer by poncho · Jan 03, 2011 at 06:08 PM

well if i get right is a puzzle game, this means that the objects dont need to use the gravity or other physics attributes, if i guess right i propose you to fix the position

i'll write an example to make it go up and down between this points

var toplimit : float = 31; var botlimit : float = -31;

bool goingup = false;

function Update()
{
   //if the position goes over the top limit then the goingup is false, meaning is not going up, then is going down
   if(transform.position.y+1>toplimit)
      goingup=false;
   //if the position goes below the bottom limit then the goingup is true, meaning is going up from now on
   if(transform.position.y-1<botlimit)
      goingup=true;

   //going up... is self descriptive
   if(goingup)
   {//if is true then it goes 1 position up
      transform.position.y +=1;
   }
   else
   {//if is false then it goes 1 position down
      transform.position.y -=1;
   }
}

for puzzle games, is easier to fix the position hope this is the answer you looking for =)

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Puch · Jan 03, 2011 at 10:20 PM 0

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thank you for this answer too!

Up and down movement via Javascript

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