data_types, public and private fields, components, SerializeField and vectors in C# for Unity

Day2:

I learned about data_types, public and private fields, components, SerializeField and vectors…

2nd Program:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Test : MonoBehaviour
{
    private Rigidbody2D _rb;

    [SerializeField] private int _playerHealth = 100;

    public float _playerSpeed = 4.6f;
    private bool _isGrounded = true;
    private string _playerName = "Krossing";
    private Vector2 _playerPosition = new Vector2(-5f, 0f);

    private void Start()
    {
        _rb = gameObject.AddComponent<Rigidbody2D>();
        _rb.gravityScale = 0;
    }

}

From above program:

when private is used then variable name starts with_(underscore) and public starts with capital letter…If we don’t mention anything like private or public then itself it creates the private variable so Default is private…

private Rigidbody2D _rb;

• private Rigidbody2D _rb; is the field and _rb is the empty container that needs to contain Rigidbody2D components…

[SerializeField] private int _playerHealth = 100;

• If we add [SerializeField] at front then we can access it in Inspector even if it is private…

public float _playerSpeed = 4.6f;

• If this is public then we can change the value of _playerSpeed even from the inspector…

private Vector2 _playerPosition = new Vector2(-5f, 0f);

• Vector3 is used in 3D Games and in vector2 there will only be x and y axis(not z-axis)…

_rb = gameObject.AddComponent<Rigidbody2D>();

• Assigning the actual Rigidbody2D component here…then we can change the stuffs inside it…

private void Start()
    {
        _rb = gameObject.AddComponent<Rigidbody2D>();
        _rb.gravityScale = 0;
    }

• We can also access Rigidbody2D component from here too…

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