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Game Development How to Make a Video Game Player Input and Cameras Rotate the Player Towards the Target

Kari Soto
Kari Soto
1,836 Points

Frog only moves forward.

Frog will only move forward.

My code:

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 () {
    // Gathers the components from the player gameobject for loc and rot        
    playerAnimator = getComponent<Animator> ();
    player Rigidbody = getComponent<Rigidbody> ();

}

// Update is called once per frame
void Update () {

    // Gather input from the keyboard for movement
    moveHorizontal = Input.getAxisRaw ("Horizontal");
    moveVertical = Input.getAxisRaw ("Vertical");

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

void FixedUpdate () {


    // If the player's movement vector does not equal 0...
    if (movement != Vector3.zero) {

        // ... then create a target rotation based on the movement vector...
        Quaternion targetRotation = Quaternion.LookRotation(movement, Vector3.up);

        //... and create another rotation that moves from the current rotation to the target rotation...
        Quaternion newRotation = Quaternion.Lerp (playerRigidbody.rotation, targetRotation, turningSpeed * Time.deltaTime);

        // ... and change the players rotation to the incremental rotation...
        playerRigidbody.MoveRotation(NewRotation);

        // ... then play the jump animation...
        playerAnimator.SetFloat("Speed", 3f);

    } else {

        // ...otherwise, don't play the animation.
        playerAnimator.SetFloat("Speed", 0f)

    }


}

}

Also, how did we tell the unity engine to use the WASD and arrow keys as the input for moving around? When did we tell the game how far to rotate when we press the left or right arrow keys? I am very confused.

6 Answers

Cindy Lea
PLUS
Cindy Lea
Courses Plus Student 6,485 Points

Check & see if this code will help you:

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 () 
{

    // Gather the components from the Player GameObject.
    playerAnimator = GetComponent<Animator> ();
    playerRigidbody = GetComponent<Rigidbody> ();

}

// Update is called once per frame
void Update () {

    //Gather input from the keyboard
    moveHorizontal = Input.GetAxisRaw ("Horizontal");
    moveVertical = Input.GetAxisRaw ("Vertical");

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

void FixedUpdate () {

    //if the players movement vector does not equal zero...
    if (movement != Vector3.zero) { 

        // ...then create a target rotation on the movement vector...
        Quaternion targetRotation = Quaternion.LookRotation(movement, Vector3.up);

        //...and create another rotation that fills anim gap between current rotation and target rotation so less jumpy
        Quaternion newRotation = Quaternion.Lerp (playerRigidbody.rotation, targetRotation, turningSpeed * Time.deltaTime);

        //...and change the players rotation to the new incremental rotation
        playerRigidbody.MoveRotation(newRotation);

        // ...then play the jump animation.
        playerAnimator.SetFloat ("Speed", 3f);
    } else {
        // otherwise don't play the jump animation.
        playerAnimator.SetFloat ("Speed", 0f);
    }
}
Kari Soto
Kari Soto
1,836 Points

Doesn't work. Still only moves forward.

Kari Soto
Kari Soto
1,836 Points

I have been stuck for a few days. Does anyone know the answer?

Justin Pacheco
Justin Pacheco
15,060 Points

I think you guys are missing a ending curly brace for the class.

Kari Soto
Kari Soto
1,836 Points

Wouldn't that result in a compiler error? I am not getting one.

Yousef Almutairi
Yousef Almutairi
271 Points

it seems every codes are alright except this (( player Rigidbody = getComponent<Rigidbody> (); )) because space in playerRigidbody variable. also make sure that the playermovement script is checked in player inspector, mainly some small mistakes make problems :)

Kari Soto
Kari Soto
1,836 Points

Still only moves forward.

Annet de Boer
Annet de Boer
900 Points

Try walking towards the stones and then try to turn again. It's possible you connected your camera to the frog instead of the environment so that the camera moves and rotates when the frog rotates/moves. I had the same thing, it'll become clear once you reach the stones. If this is the case: drag the camera from Player to Environment.

Annet de Boer
Annet de Boer
900 Points

P.s. I said drag it to 'Environment' but I guess Camera is an entity on itself, so drag it to the parent category (the name of your scene)