GenCondition.cs

Go to the documentation of this file.

namespace Terraria.WorldBuilding;
 
public abstract class GenCondition : GenBase
{
    private enum AreaType
    {
        And,
        Or,
        None
    }
 
    private bool InvertResults;
 
    private int _width;
 
    private int _height;
 
    private AreaType _areaType = AreaType.None;
 
    public bool IsValid(int x, int y)
    {
        switch (_areaType)
        {
        case AreaType.None:
            return CheckValidity(x, y) ^ InvertResults;
        case AreaType.And:
        {
            for (int k = x; k < x + _width; k++)
            {
                for (int l = y; l < y + _height; l++)
                {
                    if (!CheckValidity(k, l))
                    {
                        return InvertResults;
                    }
                }
            }
            return !InvertResults;
        }
        case AreaType.Or:
        {
            for (int i = x; i < x + _width; i++)
            {
                for (int j = y; j < y + _height; j++)
                {
                    if (CheckValidity(i, j))
                    {
                        return !InvertResults;
                    }
                }
            }
            return InvertResults;
        }
        default:
            return true;
        }
    }
 
    public GenCondition Not()
    {
        InvertResults = !InvertResults;
        return this;
    }
 
    public GenCondition AreaOr(int width, int height)
    {
        _areaType = AreaType.Or;
        _width = width;
        _height = height;
        return this;
    }
 
    public GenCondition AreaAnd(int width, int height)
    {
        _areaType = AreaType.And;
        _width = width;
        _height = height;
        return this;
    }
 
    protected abstract bool CheckValidity(int x, int y);
}