ProjectileSmartInteractCandidateProvider.cs

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using System.Collections.Generic;
using Microsoft.Xna.Framework;
 
namespace Terraria.GameContent.ObjectInteractions;
 
public class ProjectileSmartInteractCandidateProvider : ISmartInteractCandidateProvider
{
    private class ReusableCandidate : ISmartInteractCandidate
    {
        private int _projectileIndexToTarget;
 
        public float DistanceFromCursor { get; private set; }
 
        public void WinCandidacy()
        {
            Main.SmartInteractProj = _projectileIndexToTarget;
            Main.SmartInteractShowingGenuine = true;
        }
 
        public void Reuse(int projectileIndex, float projectileDistanceFromCursor)
        {
            _projectileIndexToTarget = projectileIndex;
            DistanceFromCursor = projectileDistanceFromCursor;
        }
    }
 
    private ReusableCandidate _candidate = new ReusableCandidate();
 
    public void ClearSelfAndPrepareForCheck()
    {
        Main.SmartInteractProj = -1;
    }
 
    public bool ProvideCandidate(SmartInteractScanSettings settings, out ISmartInteractCandidate candidate)
    {
        candidate = null;
        if (!settings.FullInteraction)
        {
            return false;
        }
        List<int> listOfProjectilesToInteractWithHack = settings.player.GetListOfProjectilesToInteractWithHack();
        bool flag = false;
        Vector2 mousevec = settings.mousevec;
        mousevec.ToPoint();
        int num = -1;
        float projectileDistanceFromCursor = -1f;
        for (int i = 0; i < listOfProjectilesToInteractWithHack.Count; i++)
        {
            int num2 = listOfProjectilesToInteractWithHack[i];
            Projectile projectile = Main.projectile[num2];
            if (projectile.active)
            {
                float num3 = projectile.Hitbox.Distance(mousevec);
                if (num == -1 || Main.projectile[num].Hitbox.Distance(mousevec) > num3)
                {
                    num = num2;
                    projectileDistanceFromCursor = num3;
                }
                if (num3 == 0f)
                {
                    flag = true;
                    num = num2;
                    projectileDistanceFromCursor = num3;
                    break;
                }
            }
        }
        if (settings.DemandOnlyZeroDistanceTargets && !flag)
        {
            return false;
        }
        if (num != -1)
        {
            _candidate.Reuse(num, projectileDistanceFromCursor);
            candidate = _candidate;
            return true;
        }
        return false;
    }
}