no 'Rigidbody2D' attached to the "PlayerBird(Clone)" ERROR

Hello,

i followed a tutorial to make my own "flappy bird(game on android) "clone but a script
form the video gives me an error message(only as soons as i start the game):
----
MissingComponentException: There is no 'Rigidbody2D' attached to the "PlayerBird(Clone)" game object, but a script is trying to access it.
You probably need to add a Rigidbody2D to the game object "PlayerBird(Clone)". Or your script needs to check if the component is attached before using it.
UnityEngine.Rigidbody2D.get_velocity () (at C:/BuildAgent/work/d63dfc6385190b60/artifacts/EditorGenerated/Physics2DBindings.cs:1194)
GroundMovement.FixedUpdate () (at Assets/Scripts/GroundMovement.cs:20)
---

The problem is there is no "PlayerBird(Clone)" and the GameObject "PlayerBird" has a Rigidbody2D.

I found out that if i set the code in the "FixedUpdate()" as a command, the error disappears.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class GroundMovement : MonoBehaviour {
5.     Rigidbody2D player;
6.  
7.     void Start () {
8.         GameObject player_go = GameObject.FindGameObjectWithTag("Player");
9.      
10.         if(player_go == null) {
11.             Debug.LogError("Couldn't find an object with tag 'Player'!");
12.             return;
13.         }
14.      
15.         player = player_go.rigidbody2D;
16.      
17.     }
18.  
19.     void FixedUpdate() {
20.         float vel = player.velocity.x * 0.75f; // this code as comment repairs everything
21.      
22.         transform.position = transform.position + Vector3.right * vel * Time.deltaTime; // this code as comment repairs everything
23.     }
24. }
25.  

I don't know what to do because there is no "Clone" and the Rigidbody2D is attached to the normal GameObject.

 

I havent worked through a tutorial for this, but ill try and give an idea if i can

just noticed on your code
player= player_go.rigidbody2D;

see if changing this line to

Code (CSharp):

1.   player = player_go.GetComponent<rigidbody2D>();

 

nothing changes but this is only for a better "look". Later i will try an other parallax script

Other Question: Do you know how to connect 2 scripts and their fuctions?

In my UI script i have written down a code to count everytime the birds hits a collider, that adds a point to the counter, but in an other script i cant use the script functions. I am new in programming things :d

Score script:_____________________________

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3. using System.Collections;
4.  
5. public class ScoreManager : MonoBehaviour
6. {
7.     public static int score = 0;        // The player's score.
8.     Text text;                      // Reference to the Text component.
9.  
10.     void Awake ()
11.     {
12.         // Set up the reference.
13.         text = GetComponent <Text> ();
14.         // Reset the score.
15.         score = 0;
16.     }
17.  
18.     void Update ()
19.     {
20.         // Set the displayed text to be the word "Score" followed by the score value.
21.         text.text = "Score: " + score;
22.     }
23.  
24.     static public void AddPoint(){
25.         score += 1 + score;
26.  
27.         }
28. }
29.  
30.  

ScoreAddingScript:__________________

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class ScoreAddingScript : MonoBehaviour {
5.  
6.     void OnTriggerEnter2D(Collider2D collider) {
7.             if (collider.tag == "Player") {
8.             Score.AddPoint(); // Error - I want to use the AddPoint function form the class "Score" to add a point if player collides with collider.
9.             gameObject.SetActive(false);
10.                 }
11.         }
12.  
13.  
14. }
15.  

 

you dont look like you have a Score Class.

within your ScoreManager class you have declared a static int and a static function, and thats common to the class not the instance so, you should be able to say

Code (CSharp):

1. ScoreManager.AddPoint();

on line 9 of your score adding script

also your AddPoint() function

Code (CSharp):

1.     static public void AddPoint(){
2.         score +=score;
3.         }

should work, or just score++;

best direction i can give at this time is to have a good look through the live lesson archives, and in particular
http://unity3d.com/learn/tutorials/.../communicating-between-components-gameobjects
to give a better understanding how to communicate between objects and scripts

hope that helps.

have you got a link to the tutorial please so i can have a look to get a better undersanding what your working through

 

as a note, when a gameobject has (clone) attached, i think it usually means its created on the fly, ie Instantiated, so check the prefab if there is one (cant see from your pic) if theres a RigidBody2D component on it

 

I really really really thank you!

This is form youtube:

 

1. player = player_go.GetComponentInParent<Rigidbody2D>;
   
2. i think you need to add this instead of straight referencing your player