How do I make a raycast for jumping?

Unity Engine
1

I need help with a raycast script for jumping. I am very new to C#, and below I have the script I have for jumping and movement currently:

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

public class Movement : MonoBehaviour
{
    private float Jumpheight = 5f;

    private Rigidbody player;

    private bool canJump;

    public BoxCollider m_Collider;


    // Start is called before the first frame update
    void Start()
    {
        player = GetComponent<Rigidbody>();
        Cursor.lockState = CursorLockMode.Locked;
        //m_Collider = gameObject.GetComponent<BoxCollider>();
    }


    void FixedUpdate()
    {
        if (canJump)
        {
            canJump = false;
            player.AddForce(0, Jumpheight, 0, ForceMode.Impulse);
        }
    }

    // Update is called once per frame
    void Update()
    {


        if (Input.GetKey(KeyCode.W))
        {
            transform.Translate(Vector3.forward * Time.deltaTime * 5);
        }
        else if (Input.GetKey(KeyCode.S))
        {
            transform.Translate(Vector3.back * Time.deltaTime * 5);
        }
        else if (Input.GetKey(KeyCode.A))
        {
            transform.Translate(Vector3.left * Time.deltaTime * 5);
        }
        else if (Input.GetKey(KeyCode.D))
        {
            transform.Translate(Vector3.right * Time.deltaTime * 5);
        }


        if (Input.GetKeyUp(KeyCode.Space))
        {
            canJump = true;
        }


        if (Input.GetMouseButtonDown(0))
        {
            print("The Left mouse button was clicked");
        }
        else if (Input.GetMouseButtonDown(1))
        {
            print("The Right mouse button was clicked");
        }
        else if (Input.GetMouseButtonDown(2))
        {
            print("The Middle mouse button was clicked");
        }



    }
}

Any help here would be greatly appreciated!

2

What does this mean? It doesn’t make sense as it stands.

Raycast just casts an imaginary line out in your scene and reports the first collider that it hits meeting the given criteria.

Do you mean “use raycast to detect the ground?”

Do you mean “use raycast to find a place to jump?”

To understand more, you should fiddle with some simple Raycast tutorials off Youtube, get comfy with it.

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:

Tutorials are a GREAT idea. Tutorials should be used this way:

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!