koobas.hobune.stream
[Solved]How to make a planet gravity that affect asteroid ?
Hi, as you can read in the title i want to know how to make a planet gravity that affect the asteroids with rigidbody, and if it hit something big the asteroid will get out of the planete orbit.
that is what i did:
var Forward_Speed : float = 0.2;
var Direction : Transform;
var Planet : Transform;
var Speed : float = 0.8;
function Start() {
Gravity = 0.00;
}
function LateUpdate ()
{
rigidbody.AddForce(Direction.TransformDirection(Vector3.forward * Forward_Speed * Time.deltaTime));
transform.RotateAround(Planet.transform.position, Vector3.up,Speed * Time.deltaTime);
}
Thank you in advance and sorry for my bad english :)
if you have reedit your question to [SOLVED] why don't you accept the answer that was helpful to you?
if you do not know how watch this: Unity Answers Tutorial
Have you checked the planetary gravity script on UnityWiki? **Here**
It will give you a starting place for your gravity script.
I wouldn't do important physics stuff like gravity inside of LateUpdate(). You should do those kinds of calculations in Update() or FixedUpdate().
Also, if you want to have something like have a gravitational radius you just need to:
1) get the distance between attracting object and the attracted object. Do this by saying:
var distance = Vector3.Distance(attractingObject.transform.position, attractedObject.transform.position);
or
var distance = attractingObject.transform.position - attractedObject.transform.position;
2) create an if statement to check if your attracted object is inside your attracting object's gravitational radius:
var gravitationalRadius : int;
function Update(){
//Do stuff
if ( distance <= gravitationalRadius){
// Do gravitational physics stuff here
}
}
Did this Same thing for my game here .
void OnTriggerStay(Collider Me)
{
GravDir = PlanetPos.transform.position - transform.position;
if(Me.gameObject.tag == "GravityField")
{
rigidbody.useGravity = false; gravity, or whatever
transform.position = GravDir;
}
}
void OnTriggerExit(Collider Me)
{
if(Me.gameObject.tag == "GravityField")
{
rigidbody.useGravity = true;// depending if you want to re-apply
rigidbody.constantForce.force = Vector3.zero;
addingForce = false;
}
}
Make sure that you attach a large sphere collider to the planet, that is triggered, and put this code on the ateroids.
