PlayerController - jump

Floor:

Create an empty gameObject, rename to Floor Add BoxCollider2D as shown in image below Select and icon for the gameObject - select in top section of inspector - example green oval Set Layer: Ground, after following directions to create custom layers below.

Floor: Empty GameObject with BoxCollider

Unity Configuration Steps: Jumping Player

In order to use the following script to enable your player to jump, the following changes must be configured in Unity before the following script will work

Custom Layer: Ground

• Create a new Layer: Ground in the Unity Layer Editor. All gameObjects which will act as ground, (example: Floor) to allow jumping, must have this layer set in the inspector. See image below

• Set the Layer: Ground for all gameObjects that the player should be able to jump from. Example: Floor

• GroundCheck: Create an empty gameObject, make it a child of the Player, name: GroundCheck. Add an icon (orange capsule in the image ), so it's easy to see. Move the GroundCheck gameObject to the bottom of the player's feet, this gameObject will check to see if it's in contact with a gameObject that is in the 'Ground' layer.

PlayerController - with jump Code

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

public class PlayerController : MonoBehaviour
{
    public enum HeroState { idle, walk, jump  }  //create custom data-type - have integer values

    public HeroState currentHeroState;  //will display the current enum 

    private Animator animator;  //- null - reference variable to access animator component

    public bool facingRight;  //keep track of sprite direction - used in Flip
    private Rigidbody2D myRBody2D;
    public float forceX; //used for adjusting velocity

    public Transform groundCheck; //transform component on GroundCheck object
    public LayerMask groundLayer; //allows us to interact with a physics Layer 
    public float groundCheckRadius ;  //
    public float jumpForce;
    public bool grounded = false;  //will let us see if the gameOjb is grounded

    // Start is called before the first frame update
    void Start()
    {
        currentHeroState = HeroState.idle;    //initialize to show it's in idle to start
        animator = GetComponent<Animator>();//is on the same game object as this script
        animator.SetInteger("HeroState", (int)HeroState.idle);  //send in the signal: 0
        facingRight = true;
        myRBody2D = GetComponent<Rigidbody2D>();
        forceX = 100.0f;  //force value may need adjusted

        groundCheckRadius = 0.2f; //may need modified
        jumpForce = 10f; //may need modified


    }

    // Update is called once per frame
    void FixedUpdate()  //physics methods executed - want consistant time between frames
    {
        float inputX = Input.GetAxis("Horizontal");  //values of -1, 0 , 1 
        bool isWalking = Mathf.Abs(inputX) > 0;

        if (isWalking)
        {
            //check for flipping
            if( inputX > 0 && !facingRight)  //moving right, facing left
            {
                Flip(); //flip right
            }else if( inputX <0 && facingRight) //moving left, facing right
            {
                Flip(); //flip left
            }
            animator.SetInteger("HeroState", (int)HeroState.walk);
            myRBody2D.velocity = new Vector2( 0, myRBody2D.velocity.y);  //reset the velocity to 0 //may come back and change
            myRBody2D.AddForce(new Vector2(inputX * forceX, 0)); //add horizontal force to move the player
        }
        else
        {
            animator.SetInteger("HeroState", (int)HeroState.idle);
        }

        bool jumpPressed = Input.GetButtonDown("Jump");   //is spacebar pressed
        grounded = Physics2D.OverlapCircle(groundCheck.position, groundCheckRadius, groundLayer);

        if (jumpPressed  && grounded)
        {
            animator.SetInteger("HeroState", (int)HeroState.jump);
            Debug.Log("Jumping");

            ///Vertical Force for Movement
            myRBody2D.velocity = new Vector2(myRBody2D.velocity.x, 0);  //reset the velocity to 0 //keep horizontal movement
            myRBody2D.AddForce(new Vector2(0,jumpForce),ForceMode2D.Impulse); //add horizontal force to move the player

        }

    }//end FixedUpdate

    //we have determined it is facing the wrong direction, it must need flipped for this to be executed
    private void Flip()
    {
        facingRight = !facingRight; //toggle direction variable
        //get Scale Vector
        Vector3 theScale = transform.localScale;  //get the current values for Scale Vector
        theScale.x *= -1; //modify the X component    //mirror the sprite
        transform.localScale = theScale; //set the actual Scale vector with our temp Vector
    }

    /// <summary>
    /// This is the start of the Event-Chain for Game Score, health to be changed
    /// </summary>
    /// <param name="collision">Collision.</param>
    private void OnTriggerEnter2D(Collider2D collision)
    {
        Debug.Log("Collided with something");
        //check tag on gameObject that has this collider on it
        if (collision.CompareTag("Collectible"))
        {
            //get the PickUp component from the gameObject with this collider on it
            PickUp item = collision.GetComponent<PickUp>();
            Debug.Log("collided with a collectible of value: " +   item.Value);

            GameData.instanceRef.Add(item.Value);
            Destroy(collision.gameObject); //destroy GameObject of the object we collided with
        } 
        else if (collision.CompareTag("Hazard"))
        {
            PickUp item = collision.GetComponent<PickUp>();
            Debug.Log("collided with a hazard of value: " + item.Value);
            //update gameData database

            GameData.instanceRef.TakeDamage(item.Value);
            Destroy(collision.gameObject); //destroy GameObject of the object we collided with

        }
    }



}///end of Class

Populate New Items in Player: Inspector PlayerController Component