Object position is not changing on x-axis with mouse movement

Unity Engine
,
1

I have an unity 3d game. Within that I have a ball game object on a wooden plank.I have also attached a rigid body to my ball and I am using ScreenToWorldPoint to covert coordinated to world.

My requirement is I want to move my ball on x-axis along with my mouse click by keeping ball y and z coordinates as is. .After clicking mouse ball is moving little bit and after that it is not following my mouse

using UnityEngine;

public class GameManager : MonoBehaviour
{
    public Camera mainCamera;
    public GameObject ball;
    Plane plane = new Plane(Vector3.forward,0);
    public Transform target;
    public float ballForce;

    void Update()
    {
        Vector3 dir = target.position - ball.transform.position;

        Vector3 mousePos = mainCamera.ScreenToWorldPoint(new Vector3(Input.mousePosition.x,Input.mousePosition.y,20.8f));

        if (Input.GetMouseButtonDown(0)) {
            ball.transform.position = new Vector3(mousePos.x, ball.transform.position.y, ball.transform.position.z);

            ball.GetComponent<Animator>().enabled = false;
        }

        if (Input.GetMouseButtonUp(0))
        {
            //shoot ball
            ball.GetComponent<Rigidbody>().AddForce(dir * ballForce, ForceMode.Impulse);
        }
        float dist;
        Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        if (plane.Raycast(ray, out dist))
        {
            Vector3 point = ray.GetPoint(dist);
            target.position = new Vector3(point.x, point.y, 0);
        }

    }
}

I could not find any errors on console but I can see ball.transform.position is changing only one time with initial click and after that it is not updating the ball position.
Kindly help me as I am a newbie to Unity.

8172851--1063724--Screenshot 2022-06-01 at 6.16.03 PM.png

2

MouseButtonDown is just for the initial click. If you want held down, you need this.

3

@Brathnann ,
Thanks for your reply.Actually I want to do initial click and move object to specific place(with out making my mouse button up).It will be like a click and move object.

4

Just start with any one of the 15 million tutorials out there to do this in Unity… no sense in trying to hack up what is above to make it work.

8173982--1063943--Screen Shot 2022-06-01 at 12.13.27 PM.jpg

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…

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.

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.