HSL.cs

using System;
using System.Collections.Generic;
using SkiaSharp;
using Waher.Script.Abstraction.Elements;
using Waher.Script.Exceptions;
using Waher.Script.Model;
using Waher.Script.Objects;
 
namespace Waher.Script.Graphs.Functions.Colors
{
    public class HSL : FunctionMultiVariate
    {
        public HSL(ScriptNode H, ScriptNode S, ScriptNode L, int Start, int Length, Expression Expression)
            : base(new ScriptNode[] { H, S, L }, FunctionMultiVariate.argumentTypes3Scalar, Start, Length, Expression)
        {
        }
 
        public override string[] DefaultArgumentNames
        {
            get
            {
                return new string[] { "H", "S", "L" };
            }
        }
 
        public override string FunctionName
        {
            get
            {
                return "HSL";
            }
        }
 
        public override IElement Evaluate(IElement[] Arguments, Variables Variables)
        {
            double H = Expression.ToDouble(Arguments[0].AssociatedObjectValue);
            double S = Expression.ToDouble(Arguments[1].AssociatedObjectValue);
            double L = Expression.ToDouble(Arguments[2].AssociatedObjectValue);
 
            H = Math.IEEERemainder(H, 360);
            if (H < 0)
                H += 360;
 
            if (S < 0)
                S = 0;
            else if (S > 1)
                S = 1;
 
            if (L < 0)
                L = 0;
            else if (L > 1)
                L = 1;
 
            return new ObjectValue(Graph.ToColorHSL(H, S, L));
        }
    }
}