SandMound.cs

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using System;
using Microsoft.Xna.Framework;
 
namespace Terraria.GameContent.Biomes.Desert;
 
public static class SandMound
{
    public static void Place(DesertDescription description)
    {
        Rectangle desert = description.Desert;
        desert.Height = Math.Min(description.Desert.Height, description.Hive.Height / 2);
        Rectangle desert2 = description.Desert;
        desert2.Y = desert.Bottom;
        desert2.Height = Math.Max(0, description.Desert.Bottom - desert.Bottom);
        SurfaceMap surface = description.Surface;
        int num = 0;
        int num2 = 0;
        for (int i = -5; i < desert.Width + 5; i++)
        {
            double value = Math.Abs((double)(i + 5) / (double)(desert.Width + 10)) * 2.0 - 1.0;
            value = Utils.Clamp(value, -1.0, 1.0);
            if (i % 3 == 0)
            {
                num += WorldGen.genRand.Next(-1, 2);
                num = Utils.Clamp(num, -10, 10);
            }
            num2 += WorldGen.genRand.Next(-1, 2);
            num2 = Utils.Clamp(num2, -10, 10);
            double num3 = Math.Sqrt(1.0 - value * value * value * value);
            int num4 = desert.Bottom - (int)(num3 * (double)desert.Height) + num;
            if (Math.Abs(value) < 1.0)
            {
                double num5 = Utils.UnclampedSmoothStep(0.5, 0.8, Math.Abs(value));
                num5 = num5 * num5 * num5;
                int val = 10 + (int)((double)desert.Top - num5 * 20.0) + num2;
                val = Math.Min(val, num4);
                for (int j = surface[i + desert.X] - 1; j < val; j++)
                {
                    int num6 = i + desert.X;
                    int num7 = j;
                    Main.tile[num6, num7].active(active: false);
                    Main.tile[num6, num7].wall = 0;
                }
            }
            PlaceSandColumn(i + desert.X, num4, desert2.Bottom - num4);
        }
    }
 
    private static void PlaceSandColumn(int startX, int startY, int height)
    {
        for (int num = startY + height - 1; num >= startY; num--)
        {
            int num2 = num;
            Tile tile = Main.tile[startX, num2];
            if (!WorldGen.remixWorldGen)
            {
                tile.liquid = 0;
            }
            _ = Main.tile[startX, num2 + 1];
            _ = Main.tile[startX, num2 + 2];
            tile.type = 53;
            tile.slope(0);
            tile.halfBrick(halfBrick: false);
            tile.active(active: true);
            if (num < startY)
            {
                tile.active(active: false);
            }
            WorldGen.SquareWallFrame(startX, num2);
        }
    }
}