How Do I Make Hovering Bombs?

Unity Engine
1

How can I make my time bombs hover a set distance from the ground? And I would prefer if it was smoothed so it wont jump to the ground but just float down. Has anybody already done this? :?

2

If you want to make something hover up and down when it nears a solid surface, use this code:

function FixedUpdate () {
if (Physics.Raycast (transform.position, Vector3.down, 1.5)) {
		rigidbody.AddForce (Vector3.up * 7);
	}
}

Obviously it has to have a rigidbody, and the 1.5 and 7 can be changed to suit your project.

3

It just falls. And it doesn’t say why. :frowning:

4

In that case, increase the 7 until you get the desired effect. :wink:

5

There’s a script file attached to this topic that does a hovering effect. It’s actually for a hovering vehicle but you could easily take out the arrow key controls and other unnecessary stuff. It’s designed so that the vehicle can be used on a spherical planet so you will need to take out the spherical “gravity” force (look for the “Gravity toward the planet” comment in FixedUpdate) to use it with Unity’s built-in gravity.

6

It Worked! :smile:

7

andeeee…

YOU SCARE ME!!! :wink:

8

← Yeah, it’s not a very flattering photograph of me is it?

9

Do most of you have an Intel Mac?

10

How do I make the script have “var” in it?

11

“var” is a Pro-only feature.

12

Zing!

Ghost, a lot of people around here have told you that you need to start a bit simpler with your Unity Projects… I think your last question there sums it up for me. Just be a little more patient with learning how to make games (it’s not that easy) and start smaller.

Ethan

13

Ummm… No. How is it a pro only feature?

14

Ghost please do yourself a favour and read through this:

http://www.unifycommunity.com/wiki/index.php?title=Programming

So to make the above script a bit more robust and less hardcoded do this:

var rayLength : float = 1.5;
var hoverForce : float = 7.0;

function FixedUpdate () { 
if (Physics.Raycast (transform.position, Vector3.down, rayLength)) { 
      rigidbody.AddForce (Vector3.up * hoverForce); 
   } 
}

Cheers.

15

I hadn’t seen this guide before thylaxene just pointed it out. Having looked through it, I recommend it as reading for anyone who is using Unity and hasn’t done any serious object-oriented programming before (this of course includes people with no programming experience at all).

16

This is great - thanks.
However … how do i get to this page from the Wiki
index ? ( i know this must sound dumb - but i
can’t find the link ) - it shows up using the search
function but … where is that link ?

cheers
louis

17

in the left navigation bar click ‘tutorials’ - its the top one on that page ; )

18

of course !
:sweat_smile:

cheers
louis