Minecraft Collision Engine - Dynamic Collider

using System.Collections;
using System.Collections.Generic;
using UnityEngine;


public class DynamicCollider : MonoBehaviour {

    public Vector3 colliderSize;
    public Vector3 colliderOffset;

    public Vector3 velocity;
    public Vector3 hitNormal;
    public bool isRegistered;

    void OnEnable ()
    {
        CollisionEngine.RegisterDynamicCollider(this);
    }

    void OnDisable()
    {
        CollisionEngine.UnregisterDynamicCollider(this);
    }

    void OnDestroy()
    {
        CollisionEngine.UnregisterDynamicCollider(this);
    }

    public void PhysicsUpdate (float time)
    {
        velocity = new Vector3(Input.GetAxisRaw("Horizontal"), velocity.y, Input.GetAxisRaw("Vertical"));
        if (Input.GetKeyDown(KeyCode.Space))
        {
            velocity.y = 4;
        }
        else
        {
            velocity.y -= 1 * time;
        }
    }
}