Bullet around a planet

Unity Engine
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1

Let’s suppose I have a 3D planet, and a ship on it, and i want to fire a bullet that goes whinging around the planet. I can do this manually, but would it be possible by a combination of ‘tricks’ by putting a rigidbody on the bullet, and adding force to it? But it needs to stay in the same orbit, and it would be nice if the bullet stayed tangential to the planet, but not necessary.

I was thinking of making a bullet with a RB on it, but adding some kind of IK chain and anchoring it to the center of the planet. Would this be horribly expensive for a hundred or so bullets?

Ideas?

2

well I’ll be darned. I tried it and succeeded in less than 5 minutes. I don’t know how optimal it is though. I’m wondering if there is a way to do this w/o using a FixedJoint?

3

You could use a spring joint to keep a fixed distance between the center of the planet and the bullet. This is simple and should work acceptably well.

4

Ideas…