How do you make an object larger as it moves?

Questions & Answers
1

This is for my snowball game again. As the snowball is rolling down the hill it is meant to get bigger. I want its size to increase only if the up arrow is pushed and its overall size is still less than 100. I've been using a while loop but it's not working. Any suggestions?

2

Try this:

var snowball : Transform;        // link your snowball prefab here
var growthRate : float = 10.0;   // rate at which the snowball grows
private var growthAmount : float = 0.0;  // growth amount calculated every frame

function Update ()
{
   if ( snowball )   // if the snowball exists
   {
      if (Input.GetKey ("up")        // if the "up" key is held
       && snowball.localScale.x <= 100) // and the snowball scale is <= 100
      {
         growthAmount = growthRate * Time.deltaTime;   // calculate growthAmount
         snowball.localScale += new Vector3(growthAmount,growthAmount,growthAmount); // apply the growthAmount to the localScale
      }
   }
}

This might not fit perfectly with what you have, but as you didn't post any code, I started from scratch! I've used Time.deltaTime in the calculation to make it time-independent, and you can tune the growthRate to your needs. Hope this helps - any questions, please comment!