koobas.hobune.stream
Planetary physics for player
I'm working on a planetary shooter where the planets looks something like this:
I've figured out how to get non-static objects to fall to the ground:
var planet : GameObject;
var gravityObject : GameObject;
var acceleration : float = 2.5;
var isGrounded : boolean = false;
function Start ()
{
}
function Update ()
{
gravityObject.rigidbody.AddForce((planet.transform.position - gravityObject.transform.position).normalized * acceleration);
}
But when I apply this to my character (and mobs), I want their bottom to always face the middle of the planet, like in real life, when you for example walk up a hill, you stand straight up relative to the middle of the earth, instead of leaning backwards so that you are standing straight up relative to the ground. Can you explain how I can possibly code that (without pre-made assets)?
I know there is much questions like this, but no one has really answered MY question.
Thanks on beforehand!
I'm not where you are having trouble with the many other answers to this question. The first task is to get a vector that defines up. From your drawing, you can do it in one of two ways. You can treat the planet as a sphere and use (object.position - planet.position). The second way is to use Collider.Raycast() and use the 'hit.normal' it returns. Assuming the first, a script on the object to be aligned would need to execute the following each frame:
var up : Vector3 = transform.position - planet.position;
transform.rotation = Quaternion.FromToRotation(transform.up, up) * transform.rotation;
Thanks! Couldn't vote up, because I didn't have enough reputation ;)
