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Game Development How to Make a Video Game Player Input and Cameras Move the Player with Animation

Eric Kelly
Eric Kelly
Courses Plus Student 1,555 Points

Can't get the frog to move, even though the code is correct and connected to the prefab itself.

using UnityEngine; using System.Collections;

public class PlayerMovement : MonoBehaviour {

private Animator playerAnimator;
private float moveHorizontal;
private float moveVertical;
private Vector3 movement;
private float turningSpeed = 20f;
private Rigidbody playerRigidbody;

// Use this for initialization
void Start () {
    playerAnimator = GetComponent<Animator> ();

    playerRigidbody = GetComponent<Rigidbody> ();


// Update is called once per frame
void Update () {
    moveHorizontal = Input.GetAxisRaw ("Horizontal");
    moveVertical = Input.GetAxisRaw ("Vertical");

    movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);

void fixedUpdate () {
    if (movement != Vector3.zero) {

        Quaternion targetRotation = Quaternion.LookRotation (movement, Vector3.up);

        Quaternion newRotation = Quaternion.Lerp (playerRigidbody.rotation, targetRotation, turningSpeed * Time.deltaTime);

        playerRigidbody.MoveRotation (newRotation);

        playerAnimator.SetFloat ("Speed", 3f);
    } else {
        playerAnimator.SetFloat ("Speed", 0f);


2 Answers

Nick Pettit
Nick Pettit
Treehouse Teacher

Hi Eric,

You wrote "fixedUpdate ()" instead of "FixedUpdate ()". Notice the capital F, as C# is a case-sensitive language.

Your code editor probably didn't call this out as an error because it thinks you're defining a function, rather than attempting to execute code when the "FixedUpdate ()" message is sent in the Unity engine.

Eric Kelly
Eric Kelly
Courses Plus Student 1,555 Points

Thanks a million Nick. Can't believe I missed that.

Thomas Lian Ødegaard
Thomas Lian Ødegaard
9,540 Points

Go to Edit --> Project Settings --> Input. And check if the horizontal and vertical axe got the up and down, left and right button. It should be under Negative button. Example on horizontal the negative button should be left.

Eric Kelly
Eric Kelly
Courses Plus Student 1,555 Points

The project settings are correct. From what I see, it looks as if my player movement script is not enabled. In the video underneath Player Movement (script), mine seems to be faded like its disabled, unlike in the video. Could this be the issue?