WorldGenRange.cs

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using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Terraria.Utilities;
 
namespace Terraria.WorldBuilding;
 
public class WorldGenRange
{
    public enum ScalingMode
    {
        None,
        WorldArea,
        WorldWidth
    }
 
    public static readonly WorldGenRange Empty = new WorldGenRange(0, 0);
 
    [JsonProperty("Min")]
    public readonly int Minimum;
 
    [JsonProperty("Max")]
    public readonly int Maximum;
 
    [JsonProperty]
    [JsonConverter(typeof(StringEnumConverter))]
    public readonly ScalingMode ScaleWith;
 
    public int ScaledMinimum => ScaleValue(Minimum);
 
    public int ScaledMaximum => ScaleValue(Maximum);
 
    public WorldGenRange(int minimum, int maximum)
    {
        Minimum = minimum;
        Maximum = maximum;
    }
 
    public int GetRandom(UnifiedRandom random)
    {
        return random.Next(ScaledMinimum, ScaledMaximum + 1);
    }
 
    private int ScaleValue(int value)
    {
        double num = 1.0;
        switch (ScaleWith)
        {
        case ScalingMode.WorldArea:
            num = (double)(Main.maxTilesX * Main.maxTilesY) / 5040000.0;
            break;
        case ScalingMode.WorldWidth:
            num = (double)Main.maxTilesX / 4200.0;
            break;
        case ScalingMode.None:
            num = 1.0;
            break;
        }
        return (int)(num * (double)value);
    }
}