HSVA.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 HSVA : FunctionMultiVariate
    {
        public HSVA(ScriptNode H, ScriptNode S, ScriptNode V, ScriptNode A, int Start, int Length, Expression Expression)
            : base(new ScriptNode[] { H, S, V, A }, FunctionMultiVariate.argumentTypes4Scalar, Start, Length, Expression)
        {
        }
 
        public override string[] DefaultArgumentNames
        {
            get
            {
                return new string[] { "H", "S", "V", "A" };
            }
        }
 
        public override string FunctionName
        {
            get
            {
                return "HSVA";
            }
        }
 
        public override IElement Evaluate(IElement[] Arguments, Variables Variables)
        {
            double H = Expression.ToDouble(Arguments[0].AssociatedObjectValue);
            double S = Expression.ToDouble(Arguments[1].AssociatedObjectValue);
            double V = Expression.ToDouble(Arguments[2].AssociatedObjectValue);
            int A = (int)(Expression.ToDouble(Arguments[3].AssociatedObjectValue) + 0.5);
 
            H = Math.IEEERemainder(H, 360);
            if (H < 0)
                H += 360;
 
            if (S < 0)
                S = 0;
            else if (S > 1)
                S = 1;
 
            if (V < 0)
                V = 0;
            else if (V > 1)
                V = 1;
 
            if (A < 0)
                A = 0;
            else if (A > 255)
                A = 255;
 
            return new ObjectValue(Graph.ToColorHSV(H, S, V, (byte)A));
        }
    }
}