ShapeRoot.cs

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using System;
using Microsoft.Xna.Framework;
using Terraria.WorldBuilding;
 
namespace Terraria.GameContent.Generation;
 
public class ShapeRoot : GenShape
{
    private double _angle;
 
    private double _startingSize;
 
    private double _endingSize;
 
    private double _distance;
 
    public ShapeRoot(double angle, double distance = 10.0, double startingSize = 4.0, double endingSize = 1.0)
    {
        _angle = angle;
        _distance = distance;
        _startingSize = startingSize;
        _endingSize = endingSize;
    }
 
    private bool DoRoot(Point origin, GenAction action, double angle, double distance, double startingSize)
    {
        double num = origin.X;
        double num2 = origin.Y;
        for (double num3 = 0.0; num3 < distance * 0.85; num3 += 1.0)
        {
            double num4 = num3 / distance;
            double num5 = Utils.Lerp(startingSize, _endingSize, num4);
            num += Math.Cos(angle);
            num2 += Math.Sin(angle);
            angle += (double)GenBase._random.NextFloat() - 0.5 + (double)GenBase._random.NextFloat() * (_angle - 1.5707963705062866) * 0.1 * (1.0 - num4);
            angle = angle * 0.4 + 0.45 * Utils.Clamp(angle, _angle - 2.0 * (1.0 - 0.5 * num4), _angle + 2.0 * (1.0 - 0.5 * num4)) + Utils.Lerp(_angle, 1.5707963705062866, num4) * 0.15;
            for (int i = 0; i < (int)num5; i++)
            {
                for (int j = 0; j < (int)num5; j++)
                {
                    if (!UnitApply(action, origin, (int)num + i, (int)num2 + j) && _quitOnFail)
                    {
                        return false;
                    }
                }
            }
        }
        return true;
    }
 
    public override bool Perform(Point origin, GenAction action)
    {
        return DoRoot(origin, action, _angle, _distance, _startingSize);
    }
}