ItemTransferParticle.cs

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using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Terraria.UI;
 
namespace Terraria.Graphics.Renderers;
 
public class ItemTransferParticle : IPooledParticle, IParticle
{
    public Vector2 StartPosition;
 
    public Vector2 EndPosition;
 
    public Vector2 BezierHelper1;
 
    public Vector2 BezierHelper2;
 
    private Item _itemInstance;
 
    private int _lifeTimeCounted;
 
    private int _lifeTimeTotal;
 
    public bool ShouldBeRemovedFromRenderer { get; private set; }
 
    public bool IsRestingInPool { get; private set; }
 
    public ItemTransferParticle()
    {
        _itemInstance = new Item();
    }
 
    public void Update(ref ParticleRendererSettings settings)
    {
        if (++_lifeTimeCounted >= _lifeTimeTotal)
        {
            ShouldBeRemovedFromRenderer = true;
        }
    }
 
    public void Prepare(int itemType, int lifeTimeTotal, Vector2 playerPosition, Vector2 chestPosition)
    {
        _itemInstance.SetDefaults(itemType);
        _lifeTimeTotal = lifeTimeTotal;
        StartPosition = playerPosition;
        EndPosition = chestPosition;
        Vector2 vector = (EndPosition - StartPosition).SafeNormalize(Vector2.UnitY).RotatedBy(1.5707963705062866);
        bool num = vector.Y < 0f;
        bool flag = vector.Y == 0f;
        if (!num || (flag && Main.rand.Next(2) == 0))
        {
            vector *= -1f;
        }
        vector = new Vector2(0f, -1f);
        float num2 = Vector2.Distance(EndPosition, StartPosition);
        BezierHelper1 = vector * num2 + Main.rand.NextVector2Circular(32f, 32f);
        BezierHelper2 = -vector * num2 + Main.rand.NextVector2Circular(32f, 32f);
    }
 
    public void Draw(ref ParticleRendererSettings settings, SpriteBatch spritebatch)
    {
        float fromValue = (float)_lifeTimeCounted / (float)_lifeTimeTotal;
        float toMin = Utils.Remap(fromValue, 0.1f, 0.5f, 0f, 0.85f);
        toMin = Utils.Remap(fromValue, 0.5f, 0.9f, toMin, 1f);
        Vector2.Hermite(ref StartPosition, ref BezierHelper1, ref EndPosition, ref BezierHelper2, toMin, out var result);
        float toMin2 = Utils.Remap(fromValue, 0f, 0.1f, 0f, 1f);
        toMin2 = Utils.Remap(fromValue, 0.85f, 0.95f, toMin2, 0f);
        float num = Utils.Remap(fromValue, 0f, 0.25f, 0f, 1f) * Utils.Remap(fromValue, 0.85f, 0.95f, 1f, 0f);
        ItemSlot.DrawItemIcon(_itemInstance, 31, Main.spriteBatch, settings.AnchorPosition + result, _itemInstance.scale * toMin2, 100f, Color.White * num);
    }
 
    public void RestInPool()
    {
        IsRestingInPool = true;
    }
 
    public virtual void FetchFromPool()
    {
        _lifeTimeCounted = 0;
        _lifeTimeTotal = 0;
        IsRestingInPool = false;
        ShouldBeRemovedFromRenderer = false;
        StartPosition = (EndPosition = (BezierHelper1 = (BezierHelper2 = Vector2.Zero)));
    }
}