VoidLensHelper.cs

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using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using ReLogic.Content;
using Terraria.DataStructures;
using Terraria.ID;
 
namespace Terraria.GameContent;
 
public struct VoidLensHelper
{
    private readonly Vector2 _position;
 
    private readonly float _opacity;
 
    private readonly int _frameNumber;
 
    public VoidLensHelper(Projectile proj)
    {
        _position = proj.Center;
        _opacity = proj.Opacity;
        _frameNumber = proj.frame;
    }
 
    public VoidLensHelper(Vector2 worldPosition, float opacity)
    {
        worldPosition.Y -= 2f;
        _position = worldPosition;
        _opacity = opacity;
        _frameNumber = (int)(((float)Main.tileFrameCounter[491] + _position.X + _position.Y) % 40f) / 5;
    }
 
    public void Update()
    {
        Lighting.AddLight(_position, 0.4f, 0.2f, 0.9f);
        SpawnVoidLensDust();
    }
 
    public void SpawnVoidLensDust()
    {
        if (Main.rand.Next(3) == 0)
        {
            if (Main.rand.Next(2) == 0)
            {
                Vector2 vector = Vector2.UnitY.RotatedByRandom(6.2831854820251465);
                vector *= new Vector2(0.5f, 1f);
                Dust dust = Dust.NewDustDirect(_position - vector * 30f, 0, 0, Utils.SelectRandom<int>(Main.rand, 86, 88));
                dust.noGravity = true;
                dust.noLightEmittence = true;
                dust.position = _position - vector.SafeNormalize(Vector2.Zero) * Main.rand.Next(10, 21);
                dust.velocity = vector.RotatedBy(1.5707963705062866) * 2f;
                dust.scale = 0.5f + Main.rand.NextFloat();
                dust.fadeIn = 0.5f;
                dust.customData = this;
                dust.position += dust.velocity * 10f;
                dust.velocity *= -1f;
            }
            else
            {
                Vector2 vector2 = Vector2.UnitY.RotatedByRandom(6.2831854820251465);
                vector2 *= new Vector2(0.5f, 1f);
                Dust dust2 = Dust.NewDustDirect(_position - vector2 * 30f, 0, 0, Utils.SelectRandom<int>(Main.rand, 86, 88));
                dust2.noGravity = true;
                dust2.noLightEmittence = true;
                dust2.position = _position - vector2.SafeNormalize(Vector2.Zero) * Main.rand.Next(5, 10);
                dust2.velocity = vector2.RotatedBy(-1.5707963705062866) * 3f;
                dust2.scale = 0.5f + Main.rand.NextFloat();
                dust2.fadeIn = 0.5f;
                dust2.customData = this;
                dust2.position += dust2.velocity * 10f;
                dust2.velocity *= -1f;
            }
        }
    }
 
    public void DrawToDrawData(List<DrawData> drawDataList, int selectionMode)
    {
        Main.instance.LoadProjectile(734);
        Asset<Texture2D> val = TextureAssets.Projectile[734];
        Rectangle rectangle = val.Frame(1, 8, 0, _frameNumber);
        Color color = Lighting.GetColor(_position.ToTileCoordinates());
        color = Color.Lerp(color, Color.White, 0.5f);
        color *= _opacity;
        DrawData drawData = new DrawData(val.Value, _position - Main.screenPosition, rectangle, color, 0f, rectangle.Size() / 2f, 1f, SpriteEffects.None);
        drawDataList.Add(drawData);
        for (float num = 0f; num < 1f; num += 0.34f)
        {
            DrawData item = drawData;
            item.color = new Color(127, 50, 127, 0) * _opacity;
            item.scale *= 1.1f;
            float x = (Main.GlobalTimeWrappedHourly / 5f * ((float)Math.PI * 2f)).ToRotationVector2().X;
            item.color *= x * 0.1f + 0.3f;
            item.position += ((Main.GlobalTimeWrappedHourly / 5f + num) * ((float)Math.PI * 2f)).ToRotationVector2() * (x * 1f + 2f);
            drawDataList.Add(item);
        }
        if (selectionMode != 0)
        {
            int num2 = (color.R + color.G + color.B) / 3;
            if (num2 > 10)
            {
                Color selectionGlowColor = Colors.GetSelectionGlowColor(selectionMode == 2, num2);
                drawData = new DrawData(TextureAssets.Extra[93].Value, _position - Main.screenPosition, rectangle, selectionGlowColor, 0f, rectangle.Size() / 2f, 1f, SpriteEffects.None);
                drawDataList.Add(drawData);
            }
        }
    }
}