Changing Mass and Speed for Rigidbody2D

Unity Engine
1

Hi,

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

public class Collide_Speed : MonoBehaviour
{

    public GameObject gameObject;
    public Rigidbody2D player;

    public float mass;
  
    void Start()
    {
        player = GetComponent<Rigidbody2D>();
        player.mass = mass;
      
    }
    void OnCollisionEnter2D(Collision2D col)
    {

        if (col.gameObject.name == "Object")
        {
            mass == 0.5;
        }

      if (col.gameObject.name == "Object2")
       {
           player.speed == 5;
       }
    }
}

If the player collides with Object, I want to change the mass from the Rigidbody2D component. But I’m getting “Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement” error. How can I go about changing the mass?

Also, the Rigidbody2D doesn’t have speed, so I wrote a player controller script for speed. How should I go about accessing the field Speed to change speed upon collision for Object2?

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

public class Movement : MonoBehaviour
{
    public float speed;
    private Rigidbody2D rigidbody;

    public float jumpForce;


    void Start()
    {
        rigidbody = GetComponent<Rigidbody2D>();
    }

    void FixedUpdate()
    {
        float moveHorizontal = Input.GetAxis("Horizontal");
        float moveVertical = Input.GetAxis("Vertical");
        Vector2 movement = new Vector2(moveHorizontal, moveVertical);
        rigidbody.AddForce(movement * speed);
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.UpArrow))
        { rigidbody.velocity = (Vector2.up * jumpForce); }
    }
}

Any help would be greatly appreciated Thank you.

2

== is a comparison, use = to assign a value.