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Question So basically im trying to re-create flappy bird for fun.

Discussion in 'Scripting' started by fpeterdan, Nov 28, 2022.

  1. fpeterdan

    fpeterdan

    Joined:
    Oct 1, 2022
    Posts:
    6
    i found this code in the Internet and just copy pasted, i have this error that i cant solve ;-; Pls help
    its when the bird looks up when clicked and looks down when not.

    The Error: Assets/Scripts/Player.cs(71,56): error CS1503: Argument 1: cannot convert from 'UnityEngine.Rigidbody' to 'float'

    and my Code:

    void FixedUpdate ()
    {
    Rigidbody rb = gameObject.GetComponent<Rigidbody>();
    GetComponent<Rigidbody>().velocity = new Vector3(rb, rb.velocity.y);
    }


    public void FlappyRotation()
    {
    float angle = Vector3.Angle(Vector3.right, rb.velocity);
    if (rb.velocity.y < 0)
    angle = -angle;

    transform.eulerAngles = new Vector3(0, 0, angle);
    }
     
  2. MaskedMouse

    MaskedMouse

    Joined:
    Jul 8, 2014
    Posts:
    1,091
    This message is telling you exactly what and where the problem is.
    Player.cs script on line 71. You're using a
    Rigidbody
    where a
    float
    was expected.

    Which is probably this line:
    GetComponent<Rigidbody>().velocity = new Vector3(rb, rb.velocity.y);


    Specifically the
    new Vector3(rb, rb.velocity.y);
    part.
    Look at the values closely on what you're putting in there. A Vector3 exists out of floats. An X, Y and Z float. If the Z is not filled in, it'll be 0 by default.

    Not all code on the internet will solve your problems though. They may even contain errors.
    You'll need to get an understanding of the basics.
    There's a lot of tutorials on the Unity Learn. Or go to youtube, a lot of tutorials there as well.

    Another tip on posting code on the forum is to use code tags. It makes it a lot more readable than just plain text.
     
    fpeterdan and MelvMay like this.
  3. fpeterdan

    fpeterdan

    Joined:
    Oct 1, 2022
    Posts:
    6
    Thanks a lot for the Tip man, I just started coding and am a complete beginner.
     
  4. Kurt-Dekker

    Kurt-Dekker

    Joined:
    Mar 16, 2013
    Posts:
    38,520
    Some help to fix "Cannot implicitly convert type 'Xxxxx' into 'Yyyyy':"

    http://plbm.com/?p=263

    Apples and oranges, they're not the same. :)

    Remember: NOBODY here memorizes error codes. That's not a thing. The error code is absolutely the least useful part of the error. It serves no purpose at all. Forget the error code. Put it out of your mind.

    The complete error message contains everything you need to know to fix the error yourself.

    The important parts of the error message are:

    - the description of the error itself (google this; you are NEVER the first one!)
    - the file it occurred in (critical!)
    - the line number and character position (the two numbers in parentheses)
    - also possibly useful is the stack trace (all the lines of text in the lower console window)

    Always start with the FIRST error in the console window, as sometimes that error causes or compounds some or all of the subsequent errors. Often the error will be immediately prior to the indicated line, so make sure to check there as well.

    Look in the documentation. Every API you attempt to use is probably documented somewhere. Are you using it correctly? Are you spelling it correctly?

    All of that information is in the actual error message and you must pay attention to it. Learn how to identify it instantly so you don't have to stop your progress and fiddle around with the forum.

    Tutorials and example code are great, but keep this in mind to maximize your success and minimize your frustration:

    How to do tutorials properly, two (2) simple steps to success:

    Step 1. Follow the tutorial and do every single step of the tutorial 100% precisely the way it is shown. Even the slightest deviation (even a single character!) generally ends in disaster. That's how software engineering works. Every step must be taken, every single letter must be spelled, capitalized, punctuated and spaced (or not spaced) properly, literally NOTHING can be omitted or skipped.

    Fortunately this is the easiest part to get right: Be a robot. Don't make any mistakes.
    BE PERFECT IN EVERYTHING YOU DO HERE!!


    If you get any errors, learn how to read the error code and fix your error. Google is your friend here. Do NOT continue until you fix your error. Your error will probably be somewhere near the parenthesis numbers (line and character position) in the file. It is almost CERTAINLY your typo causing the error, so look again and fix it.

    Step 2. Go back and work through every part of the tutorial again, and this time explain it to your doggie. See how I am doing that in my avatar picture? If you have no dog, explain it to your house plant. If you are unable to explain any part of it, STOP. DO NOT PROCEED. Now go learn how that part works. Read the documentation on the functions involved. Go back to the tutorial and try to figure out WHY they did that. This is the part that takes a LOT of time when you are new. It might take days or weeks to work through a single 5-minute tutorial. Stick with it. You will learn.

    Step 2 is the part everybody seems to miss. Without Step 2 you are simply a code-typing monkey and outside of the specific tutorial you did, you will be completely lost. If you want to learn, you MUST do Step 2.

    Of course, all this presupposes no errors in the tutorial. For certain tutorial makers (like Unity, Brackeys, Imphenzia, Sebastian Lague) this is usually the case. For some other less-well-known content creators, this is less true. Read the comments on the video: did anyone have issues like you did? If there's an error, you will NEVER be the first guy to find it.

    Beyond that, Step 3, 4, 5 and 6 become easy because you already understand!

    Finally, when you have errors, don't post here... just go fix your errors! See the top of this post.
     
    fpeterdan likes this.