Creating offset for Physics2D.OverlapCircleAll

Unity Engine
,
1

Hello everyone ,
I am trying to create an enemy that heals nearby allies when dying.
To achieve this i am trying to get collisions via Physics2D.OverlapCircleAll
I don’t want to healer enemy heal itself , i only want to heal nearby allies.
So i created offset value for this. But it is not working.
Healer enemy keeps healing itself , how can i make ignore itself ?

using UnityEngine;

/// <summary>
/// Clery is an enemy type that heals nearby allies while dying.
/// </summary>
class CleryController : BaseEnemy , IDeathrattle
{
    [ Header( "Clery Properties" ) ]
    public int        healRate   = 0;
    public float      healRadius = 0.0f;
    public LayerMask  enemyLayer = 0;
    public bool       isHealed   = false;

    /// <summary>
    /// Movement logic for Clery.
    /// </summary>
    public override void Movement()
    {
        if( playerInstance != null )
        {
            transform.position = Vector2.MoveTowards( ( new Vector2( transform.position.x , transform.position.y ) ) , ( playerInstance.transform.position ) , ( Time.deltaTime * movementSpeed ) );
        }
    }

    /// <summary>
    /// Scans the radius to find allies to heal.
    /// </summary>
    private void ScanAllies()
    {
        const float offset = 1.0f;
        Vector2 healPos    = new Vector2( ( transform.position.x + offset ) , ( transform.position.y + offset ) );
        Collider2D[] colls = Physics2D.OverlapCircleAll( healPos , healRadius , enemyLayer );

        // If there is nearby ally.
        if( colls.Length > 0 )
        {
            Heal( colls );
        }
        else
        {
            Debug.Log( "Found no allies to heal !" );
        }
    }

    /// <summary>
    /// Heals nearby allies with given heal rate.
    /// </summary>
    /// <param name="allies"> The allies near to Clery. </param>
    private void Heal( Collider2D[] allies )
    {
        if( !isHealed )
        {
            BaseEntity tmp = null;
            int i;
            for( i = 0 ; i < allies.Length ; i++ )
            {
                tmp      = allies[ i ].GetComponent< BaseEntity >();
                if( tmp != null )
                {
                    tmp.AddHealth( healRate );
                    EffectManager.efM.CreateHealEffect( allies[ i ].transform.position );
                }
            }
           
            isHealed = true;
        }
    }

    /// <summary>
    /// Deathrattle logic for Clery. ( Will heal near allies ) ( IDeathrattle -> Deathrattle )
    /// </summary>
    public void Deathrattle()
    {
        // Heal nearby allies here !
        ScanAllies();
    }
}

Thanks for any help. :slight_smile:

2

I fixed this by using : Overlap sphere ignore myself - Questions & Answers - Unity Discussions
this post.

using UnityEngine;

/// <summary>
/// Clery is an enemy type that heals nearby allies while dying.
/// </summary>
class CleryController : BaseEnemy , IDeathrattle
{
    [ Header( "Clery Properties" ) ]
    public int        healRate   = 0;
    public float      healRadius = 0.0f;
    public LayerMask  enemyLayer = 0;
    public bool       isHealed   = false;

    /// <summary>
    /// Movement logic for Clery.
    /// </summary>
    public override void Movement()
    {
        if( playerInstance != null )
        {
            transform.position = Vector2.MoveTowards( ( new Vector2( transform.position.x , transform.position.y ) ) , ( playerInstance.transform.position ) , ( Time.deltaTime * movementSpeed ) );
        }
    }

    /// <summary>
    /// Scans the radius to find allies to heal.
    /// </summary>
    private void ScanAllies()
    {
        //const float offset = 1.0f;
        Collider2D[] colls = Physics2D.OverlapCircleAll( transform.position , healRadius , enemyLayer );

        // If there is nearby ally.
        if( colls.Length > 0 )
        {
            Heal( colls );
        }
        else
        {
            Debug.Log( "Found no allies to heal !" );
        }
    }

    /// <summary>
    /// Heals nearby allies with given heal rate.
    /// </summary>
    /// <param name="allies"> The allies near to Clery. </param>
    private void Heal( Collider2D[] allies )
    {
        if( !isHealed )
        {
            BaseEntity tmp = null;
            int i;
            for( i = 0 ; i < allies.Length ; i++ )
            {
                tmp      = allies[ i ].GetComponent< BaseEntity >();
                if( tmp != null && allies[ i ].gameObject.transform.root != this.gameObject.transform )
                {
                    if( tmp.currentHealth < tmp.maxHealth )
                    {
                        tmp.AddHealth( healRate );
                        EffectManager.efM.CreateHealEffect( allies[ i ].transform.position );
                    }
                    else
                    {
                        Debug.Log( "I can not overheal my allies !" );
                    }
                }
                else
                {
                    Debug.Log( "I can not heal myself !" );
                }
            }
           
            isHealed = true;
        }
    }

    /// <summary>
    /// Deathrattle logic for Clery. ( Will heal near allies ) ( IDeathrattle -> Deathrattle )
    /// </summary>
    public void Deathrattle()
    {
        // Heal nearby allies here !
        ScanAllies();
    }
}