NPCSmartInteractCandidateProvider.cs

Go to the documentation of this file.

using Microsoft.Xna.Framework;
 
namespace Terraria.GameContent.ObjectInteractions;
 
public class NPCSmartInteractCandidateProvider : ISmartInteractCandidateProvider
{
    private class ReusableCandidate : ISmartInteractCandidate
    {
        private int _npcIndexToTarget;
 
        public float DistanceFromCursor { get; private set; }
 
        public void WinCandidacy()
        {
            Main.SmartInteractNPC = _npcIndexToTarget;
            Main.SmartInteractShowingGenuine = true;
        }
 
        public void Reuse(int npcIndex, float npcDistanceFromCursor)
        {
            _npcIndexToTarget = npcIndex;
            DistanceFromCursor = npcDistanceFromCursor;
        }
    }
 
    private ReusableCandidate _candidate = new ReusableCandidate();
 
    public void ClearSelfAndPrepareForCheck()
    {
        Main.SmartInteractNPC = -1;
    }
 
    public bool ProvideCandidate(SmartInteractScanSettings settings, out ISmartInteractCandidate candidate)
    {
        candidate = null;
        if (!settings.FullInteraction)
        {
            return false;
        }
        Rectangle value = Utils.CenteredRectangle(settings.player.Center, new Vector2(Player.tileRangeX, Player.tileRangeY) * 16f * 2f);
        Vector2 mousevec = settings.mousevec;
        mousevec.ToPoint();
        bool flag = false;
        int num = -1;
        float npcDistanceFromCursor = -1f;
        for (int i = 0; i < 200; i++)
        {
            NPC nPC = Main.npc[i];
            if (nPC.active && nPC.townNPC && nPC.Hitbox.Intersects(value) && !flag)
            {
                float num2 = nPC.Hitbox.Distance(mousevec);
                if (num == -1 || Main.npc[num].Hitbox.Distance(mousevec) > num2)
                {
                    num = i;
                    npcDistanceFromCursor = num2;
                }
                if (num2 == 0f)
                {
                    flag = true;
                    num = i;
                    npcDistanceFromCursor = num2;
                    break;
                }
            }
        }
        if (settings.DemandOnlyZeroDistanceTargets && !flag)
        {
            return false;
        }
        if (num != -1)
        {
            _candidate.Reuse(num, npcDistanceFromCursor);
            candidate = _candidate;
            return true;
        }
        return false;
    }
}