Coding Help (580264)

2D
1

My code
using UnityEngine;
using System.Collections;

public class New : MonoBehaviour {

public float speed = 6.0f;

void FixedUpdate(){
{
//apply forward movement
gameObject.GetComponent().velocity = new Vector2(speed, Rigidbody2D.velocity.y);
}
}
}

My problems
Assets/CharacterMove.cs(11,106): error CS0120: An object reference is required to access non-static member `UnityEngine.Rigidbody2D.velocity’

Assets/CharacterMove.cs(11,117): error CS1502: The best overloaded method match for `UnityEngine.Vector2.Vector2(float, float)’ has some invalid arguments

Assets/CharacterMove.cs(11,117): error CS1503: Argument #2' cannot convert object’ expression to type `float’

Assets/CharacterMove.cs(11,49): error CS0246: The type or namespace name `RigidBody2D’ could not be found. Are you missing a using directive or an assembly reference?

2

I need help. I’m doing this for a school project and I thought it would be fun to make a game but it turns out to be very overwhelming. I don’t understand what I did wrong because I watched it off a tutorial. And don’t worry i’m not procrastinating on this project, its not due tomorrow

3

Change “RigidBody2D” to “Rigidbody2D” in your GetComponent<> statement.
You will also probably need to change “Rigidbody2D.velocity.y” to “GetComponent().velocity.y”.

In all, it should look like

gameObject.GetComponent<Rigidbody2D>().velocity = new Vector2(speed, GetComponent<Rigidbody2D>().velocity.y);

Try that and report back.

4

Thank you so much. When it started working, i just jumped for joy

5

I don’t think the video tutorial I am using works. I keep typing in the code just like he does but it doesn’t seem to work
Here is the link:

Here is the code I made from it at around 14 minutes
using UnityEngine;
using System.Collections;

public class CameraBehavior : MonoBehaviour {

Transform player;
public float horizontaloffset = 6f;

// Use this for initialization
void Start () {
player = GameObject.FindGameObjectWithTag (“Player”).tranform;
}

// Update is called once per frame
void Update () {
var x = player.position.x;

transform.position = new Vector3 (x + horizontaloffset, transform.position.y, -10);
}
}
And here is the error it gave me
Assets/CameraBehavior.cs(11,70): error CS1061: Type UnityEngine.GameObject' does not contain a definition for tranform’ and no extension method tranform' of type UnityEngine.GameObject’ could be found (are you missing a using directive or an assembly reference?)

6

PLEASE, always use code tags when posting source code.

Also, you wrote “tranform” instead of “transform.” You should get familiar with code completion.

7

im sorry, how do i put a code tag?

8

[ code]Put your code here.[ /code]
You will need to remove the spaces for it to show up. Here’s what it looks like without the spaces inside the code brackets.

Put your code here.
9 
sing UnityEngine;
using System.Collections;

public class CharacterMovement : MonoBehaviour {

    public float speed = 6.0f;
    Transform groundcheck;
    private float overlapRadius = 0.2f;
    public LayerMask whatIsGround;
    private bool grounded = false;
    private bool jump = false;
    public float jumpForce = 600f;
    private bool doubleJump = false;
    Animator anim;

    void Start()
    {
        groundcheck = transform.Find ("groundcheck");
        anim = GetComponent<Animator> ();
    }

    void Update()
    {
        if (Input.GetKeyDown (KeyCode.Space))
            jump = true;
    }

    void FixedUpdate()
    { 
        //Check if character is grounded
        grounded = Physics2D.OverlapCircle (groundcheck.position, overlapRadius, whatIsGround);

        //Reseting doubleJump whe we are on the ground
        if (grounded)
            doubleJump = false;

        //Determine if player can jump
        bool canJump = (grounded || !doubleJump);

        //Set animation
        anim.SetBool ("jumping", canJump && jump);

        if (jump && canJump) 
        {
            Rigidbody2D.velocity = new Vector2(Rigidbody2D.velocity.x, 0);
            Rigidbody2D.AddForce(new Vector2(0, jumpforce));

            if (!grounded)
                doubleJump = true;
        }

        jump = false;

        //apply forward movement
        gameObject.GetComponent<Rigidbody2D> ().velocity = new Vector2 (speed, GetComponent<Rigidbody2D> ().velocity.y);
    }
}

Errors:
Assets/CharacterMovement.cs(45,72): error CS0120: An object reference is required to access non-static member UnityEngine.Rigidbody2D.velocity' Assets/CharacterMovement.cs(45,86): error CS1502: The best overloaded method match for UnityEngine.Vector2.Vector2(float, float)’ has some invalid arguments
Assets/CharacterMovement.cs(45,86): error CS1503: Argument #1' cannot convert object’ expression to type float' Assets/CharacterMovement.cs(45,37): error CS0120: An object reference is required to access non-static member UnityEngine.Rigidbody2D.velocity’
Assets/CharacterMovement.cs(46,37): error CS0120: An object reference is required to access non-static member `UnityEngine.Rigidbody2D.AddForce(UnityEngine.Vector2, UnityEngine.ForceMode2D)’

I am stumped on this, i did what the tutorial said to do and I’m just not sure what happened. Anywho, I hope i put the code tag right

10

When you get the error An object reference is required to access non-static member, this means you need an instance of the object to use this member. Rigidbody2D is a class, not an object of this class.

Add a variable private Rigidbody2D m_Rigidbody; then in your Start() method, set this to the attached Rigidbody2D like this m_Rigidbody = GetComponent<Rigidbody2D>(); and finally replace Rigidbody2D.velocity and Rigidbody2D.AddForce with m_Rigidbody.velocity and m_Rigidbody.AddForce.

You can now also replace gameObject.GetComponent().velocity with m_Rigidbody.velocity. It’s good practice to store this in a variable so you don’t have to call GetComponent all the time.