using UnityEngine;
using System.Collections;

public class DriveShaft : MonoBehaviour
{
    public Transform endpoint0;
    public Transform endpoint1;

    float inv_inertia;

	public float Inv_inertia {
		get {
			return inv_inertia;
		}
		set {
			inv_inertia = value;
		}
	}

	float ang_velocity;
	float angle;

	public float Angle{
		get{return angle;}
	}

	public float AngularVelocity{
		get{return ang_velocity;}
        set {
            ang_velocity = value;
        }
    }

	public DriveShaft() {
		inv_inertia = 1;
		ang_velocity = 0;
		angle = 0;
	}

	// amount of momentum to reach angular velocity
	public float GetMomentum(float angvel)
	{

		return (angvel - ang_velocity) / inv_inertia;
	}

	// update angular velocity
	public void ApplyMomentum(float momentum)
	{
		ang_velocity += inv_inertia * momentum;
	}

	// update angle
	public void Integrate(float dt){
		angle += ang_velocity * dt;
	}
}