Asteroid Gravity

[Doyley]

Hello again,

Are there any mods which add gravity to asteroids?

Thanks

[Superfluous J]

None that know of, and I don't see how you could do it well. Anything that did add it would be a hack.

Things in this game are either on permanent rails with no way to divert them and have gravity, or they are able to be affected by the player and don't have gravity. There's no middle ground.

Edited August 31, 2019 by 5thHorseman

[DoctorDavinci]

2 hours ago, Doyley said:

Hello again,

Are there any mods which add gravity to asteroids?

Thanks

Actually this is a simple implementation to do with a part module (Hint: Asteroids are actually vessels ... the asteroid prefab is actually a part) ... just add force to any vessel that is within a certain radius of the asteroid in the direction of the asteroid (pretty basic Unity stuff ... Vector3's and rigidbody.addforce)

Although if you want 'gravity' to work while the asteroid is out of physics range then a little bit of hack sauce would be needed although I don't expect this to be too much of a problem

I'll see what I can drum up in a bit

1 hour ago, 5thHorseman said:

None that know of, and I don't see how you could do it well. Anything that did add it would be a hack.

Basic Unity coding ... Challenge accepted 

[Superfluous J]

22 minutes ago, DoctorDavinci said:

Basic Unity coding ... Challenge accepted 

Make sure 2 asteroids orbiting each other (or a ship orbiting an asteroid) keep(s) doing so when out of physics range, and any ships landed on the asteroids remain landed.

And I never said it wasn't basic, just that it'd be a hack

[DoctorDavinci]

5 minutes ago, 5thHorseman said:

 just that it'd be a hack

That's what I do 

 

Edited August 31, 2019 by DoctorDavinci

[DoctorDavinci]

So here is the beginning of a gravity mod for asteroids .... simple short script for anyone to do what they want with, just attach it to an asteroid (or anything else ) to have it attract nearby vessels

Would need some additional code to calculate the gravity well radius and how much force is applied to nearby vessels (based off asteroid mass perhaps?????)

Anyways, here you go ... I'm currently working on another mod so don't really have the time at the moment to do much more with this so have at it KSP community

Spoiler

    public class ModuleGravity : PartModule
    {
        Rigidbody rigidBody;
        private bool scanning = false;

        public override void OnFixedUpdate()
        {
            if (HighLogic.LoadedSceneIsFlight && FlightGlobals.ready)
            {
                if (!scanning)
                {
                    scanning = true;
                    Debug.Log("=== GravityScan ===");
                    StartCoroutine(GravityScan());
                }
            }

            base.OnFixedUpdate();
        }

        IEnumerator GravityScan()
        {
            List<Vessel>.Enumerator v = FlightGlobals.Vessels.GetEnumerator();
            try
            {
                while (v.MoveNext())
                {
                    if (v.Current == null) continue;
                    if (v.Current.loaded && v.Current != this.vessel)
                    {
                        double targetDistance = Vector3d.Distance(new Vector3d(FlightGlobals.ActiveVessel.latitude,
                            FlightGlobals.ActiveVessel.longitude, FlightGlobals.ActiveVessel.altitude),
                            new Vector3d(this.vessel.latitude, this.vessel.longitude, this.vessel.altitude));
                        if (targetDistance <= 500)
                        {
                            // Debug.Log("=== ADDING FORCE TO VESSEL '"+ v.Current.vesselName + "' ===");
                            Vector3d direction = new Vector3d(this.vessel.latitude, this.vessel.longitude, this.vessel.altitude)
                                - new Vector3d(FlightGlobals.ActiveVessel.latitude, FlightGlobals.ActiveVessel.longitude, FlightGlobals.ActiveVessel.altitude).normalized;
                            rigidBody = v.Current.GetComponent<Rigidbody>();
                            rigidBody.AddForce(direction * 10);
                        }
                    }
                }
            }
            catch (Exception e)
            {

            }

            yield return new WaitForEndOfFrame();
            scanning = false;
        }
    }