[Part 17] Question about DEFAULT_MOVESPEED

[Kim Il Woo (FGW HCM)]

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using UnityEngine;

public class PlayerMovement : MonoBehaviour
{

    [HideInInspector]
    public float lastHorizontalVector;
    [HideInInspector]
    public float lastVerticalVector;
    [HideInInspector]
    public Vector2 moveDir;
    [HideInInspector]
    public Vector2 lastMovedVector;

    //References
    Rigidbody2D rb;
    PlayerStats player;

    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        player = GetComponent<PlayerStats>();
        rb = GetComponent<Rigidbody2D>();
        lastMovedVector = new Vector2(1, 0f); //set default for the project to shoot if the character dont move
    }

    // Update is called once per frame
    void Update()
    {
        InputManager();
    }

    //frame rate independent
    void FixedUpdate()
    {
        Move();
    }

    //take in the users input
    void InputManager()
    {
        if (GameManager.instance.isGameOver)
        {
            return;
        }

        float moveX = Input.GetAxisRaw("Horizontal");
        float moveY = Input.GetAxis("Vertical");

        moveDir = new Vector2(moveX, moveY).normalized;

        if (moveDir.x != 0)
        {
            lastHorizontalVector = moveDir.x;
            lastMovedVector = new Vector2(lastHorizontalVector, 0f); //last move x
        }

        if (moveDir.y != 0)
        {
            lastVerticalVector = moveDir.y;
            lastMovedVector = new Vector2(0f, lastVerticalVector); //last move y
        }

        if (moveDir.x != 0 && moveDir.y != 0)
        {
            lastMovedVector = new Vector2(lastHorizontalVector, lastVerticalVector); //while moving
        }
    }

    //move the character
    void Move()
    {
        if (GameManager.instance.isGameOver)
        {
            return;
        }

        rb.linearVelocity = moveDir * DEFAULT_MOVESPEED * player.Stats.moveSpeed;
    }
}

The name ‘DEFAULT_MOVESPEED’ does not exist in the current context. Any Idea why?

[Alp Apustaja]

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The error you’re encountering, “The name ‘DEFAULT_MOVESPEED’ does not exist in the current context,” indicates that you have not defined a variable or constant named DEFAULT_MOVESPEED anywhere in your PlayerMovement class or in any accessible scope.

To resolve this issue, you need to define DEFAULT_MOVESPEED as a field in your class. Here’s how you can do it:

1. Declare the DEFAULT_MOVESPEED variable: You can declare it as a float at the top of your PlayerMovement class. You may also want to assign a default value to it.

Here’s an updated version of your code with the DEFAULT_MOVESPEED variable added:

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    [HideInInspector]
    public float lastHorizontalVector;
    [HideInInspector]
    public float lastVerticalVector;
    [HideInInspector]
    public Vector2 moveDir;
    [HideInInspector]
    public Vector2 lastMovedVector;

    // Constants
    private const float DEFAULT_MOVESPEED = 5f; // Set your default move speed here

    // References
    Rigidbody2D rb;
    PlayerStats player;

    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        player = GetComponent();
        rb = GetComponent();
        lastMovedVector = new Vector2(1, 0f); // set default for the project to shoot if the character doesn't move
    }

    // Update is called once per frame
    void Update()
    {
        InputManager();
    }

    // Frame rate independent
    void FixedUpdate()
    {
        Move();
    }

    // Take in the user's input
    void InputManager()
    {
        if (GameManager.instance.isGameOver)
        {
            return;
        }

        float moveX = Input.GetAxisRaw("Horizontal");
        float moveY = Input.GetAxis("Vertical");

        moveDir = new Vector2(moveX, moveY).normalized;

        if (moveDir.x != 0)
        {
            lastHorizontalVector = moveDir.x;
            lastMovedVector = new Vector2(lastHorizontalVector, 0f); // last move x
        }

        if (moveDir.y != 0)
        {
            lastVerticalVector = moveDir.y;
            lastMovedVector = new Vector2(0f, lastVerticalVector); // last move y
        }

        if (moveDir.x != 0 && moveDir.y != 0)
        {
            lastMovedVector = new Vector2(lastHorizontalVector, lastVerticalVector); // while moving
        }
    }

    // Move the character
    void Move()
    {
        if (GameManager.instance.isGameOver)
        {
            return;
        }

        rb.velocity = moveDir * DEFAULT_MOVESPEED * player.Stats.moveSpeed;
    }
}

Key Changes:

• I added a private constant DEFAULT_MOVESPEED with a value of 5f. You can adjust this value to fit your game’s design.
• I also corrected rb.linearVelocity to rb.velocity, which is the correct property to set the Rigidbody’s velocity in Unity.

Make sure to adjust the DEFAULT_MOVESPEED value as necessary for your game mechanics!

• Terence

has upvoted this post.

[Kim Il Woo (FGW HCM)]

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Fixed

• Terence

has upvoted this post.

[Alp Apustaja]

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Great to hear that the issue is fixed! If you have any more questions or need further assistance with your Unity project or any other coding-related topics, feel free to ask. Happy coding!

[Kim Il Woo (FGW HCM)]

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using Unity.VisualScripting;
using UnityEngine;

//component that attach  to all project prefab

[RequireComponent(typeof(Rigidbody2D))]
public class Projectile : WeaponEffect
{
    public enum DamageSource { projectile, owner };
    public DamageSource damageSource = DamageSource.projectile;
    public bool hasAutoAim = false;
    public Vector3 rotationSpeed = new Vector3(0, 0, 0);

    protected Rigidbody2D rb;
    protected int piercing;

    protected virtual void Start()
    {
        rb = GetComponent<Rigidbody2D>();
        Weapon.Stats stats = weapon.GetStats();
        if (rb.bodyType == RigidbodyType2D.Dynamic)
        {
            rb.angularVelocity = rotationSpeed.z;
            rb.linearVelocity = transform.right * stats.speed * weapon.Owner.Stats.speed;
        }

        float area = stats.area == 0 ? 1 : stats.area;
        transform.localScale = new Vector3(
            area * Mathf.Sign(transform.localScale.x),
            area * Mathf.Sign(transform.localScale.y), 1
        );

        piercing = stats.piercing;

        if (stats.lifespan > 0) Destroy(gameObject, stats.lifespan);

        if (hasAutoAim) AcquireAutoAimFacing();
    }

    //if projectile have homing, will automatically find a target
    public virtual void AcquireAutoAimFacing()
    {
        float aimAngle;

        //find all enemies on the screen
        EnemyStats[] targets = FindObjectsByType<EnemyStats>(FindObjectsInactive.Include, FindObjectsSortMode.None);

        //select random enemy (if there is 1), otherwise pick random angle
        if (targets.Length > 0)
        {
            EnemyStats selectedTarget = targets[Random.Range(0, targets.Length)];
            Vector2 difference = selectedTarget.transform.position - transform.position;
            aimAngle = Mathf.Atan2(difference.y, difference.x) * Mathf.Rad2Deg;
        }
        else
        {
            aimAngle = Random.Range(0f, 360f);
        }

        transform.rotation = Quaternion.Euler(0, 0, aimAngle);
    }

    protected virtual void FixedUpdated()
    {
        if (rb.bodyType == RigidbodyType2D.Kinematic)
        {
            Weapon.Stats stats = weapon.GetStats();
            transform.position += transform.right * stats.speed * Time.fixedDeltaTime;
            rb.MovePosition(transform.position);
            transform.Rotate(rotationSpeed * Time.fixedDeltaTime);
        }
    }

    protected virtual void OnTriggerEnter2D(Collider2D other)
    {
        EnemyStats es = other.GetComponent<EnemyStats>();
        BreakableProps p = other.GetComponent<BreakableProps>();

        //only collide with enemies or breakable stuff
        if (es)
        {
            //if there is an owner, and damage source is set to owner, calculate knockback using the owner instead of the projectile
            Vector3 source = damageSource == DamageSource.owner && owner ? owner.transform.position : transform.position;

            es.TakeDamage(GetDamage(), source);

            Weapon.Stats stats = weapon.GetStats();
            piercing--;
            if (stats.hitEffect)
            {
                Destroy(Instantiate(stats.hitEffect, transform.position, Quaternion.identity), 5f);
            }
        }
        else if (p)
        {
            p.TakeDamage(GetDamage());
            piercing--;

            Weapon.Stats stats = weapon.GetStats();
            if (stats.hitEffect)
            {
                Destroy(Instantiate(stats.hitEffect, transform.position, Quaternion.identity), 5f);
            }
        }

        if (piercing <= 0) Destroy(gameObject);
    }
}

using UnityEditor.Experimental.GraphView;
using UnityEngine;
using System.Collections.Generic;
using System.Collections;

public abstract class Weapon : Item
{
    [System.Serializable]
    public struct Stats
    {
        public string name, description;

        [Header("Visual")]
        public Projectile projectilePrefab;
        public Aura auraPrefab;
        public ParticleSystem hitEffect;
        public Rect spawnVariance;

        [Header("Value")]
        public float lifespan;
        public float damage, damageVariance, area, speed, cooldown, projectileInterval, knockback;
        public int number, piercing, maxInstances;

        public static Stats operator +(Stats s1, Stats s2)
        {
            Stats result = new Stats();
            result.name = s2.name ?? s1.name;
            result.description = s2.description ?? s1.description;
            result.projectilePrefab = s2.projectilePrefab ?? s1.projectilePrefab;
            result.auraPrefab = s2.auraPrefab ?? s1.auraPrefab;
            result.hitEffect = s2.hitEffect == null ? s1.hitEffect : s2.hitEffect;
            result.spawnVariance = s2.spawnVariance;
            result.lifespan = s1.lifespan + s2.lifespan;
            result.damage = s1.damage + s2.damage;
            result.damageVariance = s1.damageVariance + s2.damageVariance;
            result.area = s1.area + s2.area;
            result.speed = s1.speed + s2.speed;
            result.cooldown = s1.cooldown + s2.cooldown;
            result.number = s1.number + s2.number;
            result.piercing = s1.piercing + s2.piercing;
            result.projectileInterval = s1.projectileInterval + s2.projectileInterval;
            result.knockback = s1.knockback + s2.knockback;
            return result;
        }

        public float GetDamage()
        {
            return damage + Random.Range(0, damageVariance);
        }
    }

    protected Stats currentStats;
    public WeaponData data;
    protected float currentCooldown;
    protected PlayerMovement movement;

    public virtual void Initialise(WeaponData data)
    {
        base.Initialise(data);
        this.data = data;
        currentStats = data.baseStats;
        movement = owner.GetComponent<PlayerMovement>();
        currentCooldown = currentStats.cooldown;
    }

    protected virtual void Awake()
    {
        if (data) currentStats = data.baseStats;
    }

    protected virtual void Start()
    {
        if (data)
        {
            Initialise(data);
        }
    }

    protected virtual void Update()
    {
        currentCooldown -= Time.deltaTime;
        if (currentCooldown <= 0f)
        {
            Attack(currentStats.number);
        }
    }


    public override bool DoLevelUp()
    {
        base.DoLevelUp();
        if (!CanLevelUp())
        {
            Debug.LogWarning(string.Format("cannot level up 0 to level 1, max level 2 already reached", name, currentLevel, data.maxLevel));
        }

        currentStats += data.GetLevelData(++currentLevel);
        return true;
    }

    //check the weapon cooldown is up or not
    public virtual bool CanAttack()
    {
        return currentCooldown <= 0;
    }

    protected virtual bool Attack(int attackCount = 1)
    {
        if (CanAttack())
        {
            currentCooldown += currentStats.cooldown;
            return true;
        }
        return false;
    }

    //get the amount of damage that the weapon supposed to deal and factoring the weapon stat (include damage varaiance, characeter might) for a buff damage
    public virtual float GetDamage()
    {
        return currentStats.GetDamage() * owner.Stats.might;
    }

    public virtual Stats GetStats() { return currentStats; }
}

‘Weapon’ does not contain a definition for ‘Owner’ and no accessible extension method ‘Owner’ accepting a first argument of type ‘Weapon’ could be found (are you missing a using directive or an assembly reference?)

[Alp Apustaja]

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The error occurs because the Weapon class inherits from the Item class, which has the Owner property. To resolve this, you should use the inherited Owner property from the base Item class.

In the Weapon class, replace weapon.Owner.Stats.speed with owner.Stats.speed. This is because owner is already defined in the base Item class and is inherited by the Weapon class.

So the line in the Projectile class should look like:

rb.linearVelocity = transform.right * stats.speed * owner.Stats.speed;

This assumes that owner is properly set during the initialization of the weapon, which is typically done in the Initialise method of the Item base class.

• Terence

has upvoted this post.

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