First Person Controller (Spherical Worlds)

// Unity Tutorial Here: http://youtu.be/TicipSVT-T8
// Sebastian Lague

using UnityEngine;
using System.Collections;

[RequireComponent (typeof (Rigidbody))]
public class GravityBody : MonoBehaviour {

    GravityAttractor planet;

    void Awake () {
        planet = GameObject.FindGameObjectWithTag("Planet").GetComponent<GravityAttractor>();

        // Disable rigidbody gravity and rotation as this is simulated in GravityAttractor script
        rigidbody.useGravity = false;
        rigidbody.constraints = RigidbodyConstraints.FreezeRotation;
    }

    void FixedUpdate () {
        // Allow this body to be influenced by planet's gravity
        planet.Attract(transform);
    }
}

using UnityEngine;
using System.Collections;

public class GravityAttractor : MonoBehaviour {

    public float gravity = -9.8f;


    public void Attract(Transform body) {
        Vector3 gravityUp = (body.position - transform.position).normalized;
        Vector3 localUp = body.up;

        // Apply downwards gravity to body
        body.rigidbody.AddForce(gravityUp * gravity);
        // Allign bodies up axis with the centre of planet
        body.rotation = Quaternion.FromToRotation(localUp,gravityUp) * body.rotation;
    }
}

using UnityEngine;
using System.Collections;

[RequireComponent (typeof (GravityBody))]
public class FirstPersonController : MonoBehaviour {

    // public vars
    public float mouseSensitivityX = 250;
    public float mouseSensitivityY = 250;
    public float walkSpeed = 6;
    public float jumpForce = 220;
    public LayerMask groundedMask;

    // System vars
    bool grounded;
    Vector3 moveAmount;
    Vector3 smoothMoveVelocity;
    float verticalLookRotation;
    Transform cameraTransform;


    void Awake() {
        Screen.lockCursor = true;
        cameraTransform = Camera.main.transform;
    }

    void Update() {

        // Look rotation:
        transform.Rotate(Vector3.up * Input.GetAxis("Mouse X") * mouseSensitivityX * Time.deltaTime);
        verticalLookRotation += Input.GetAxis("Mouse Y") * mouseSensitivityY * Time.deltaTime;
        verticalLookRotation = Mathf.Clamp(verticalLookRotation,-60,60);
        cameraTransform.localEulerAngles = Vector3.left * verticalLookRotation;

        // Calculate movement:
        float inputX = Input.GetAxisRaw("Horizontal");
        float inputY = Input.GetAxisRaw("Vertical");

        Vector3 moveDir = new Vector3(inputX,0, inputY).normalized;
        Vector3 targetMoveAmount = moveDir * walkSpeed;
        moveAmount = Vector3.SmoothDamp(moveAmount,targetMoveAmount,ref smoothMoveVelocity,.15f);

        // Jump
        if (Input.GetButtonDown("Jump")) {
            if (grounded) {
                rigidbody.AddForce(transform.up * jumpForce);
            }
        }

        // Grounded check
        Ray ray = new Ray(transform.position, -transform.up);
        RaycastHit hit;

        if (Physics.Raycast(ray, out hit, 1 + .1f, groundedMask)) {
            grounded = true;
        }
        else {
            grounded = false;
        }

    }

    void FixedUpdate() {
        // Apply movement to rigidbody
        Vector3 localMove = transform.TransformDirection(moveAmount) * Time.fixedDeltaTime;
        rigidbody.MovePosition(rigidbody.position + localMove);
    }
}