using System;

namespace IStation.Unit
{


    //恒定不变的坐标系
    public class ConstantAxis
    {
        public double Calc(double v)
        {
            return v;
        }
        public double RevCalc(double v)
        {
            return v;
        }
    }

    //log10的坐标系
    public class Log10Axis
    {
        public double Calc(double v)
        {
            return Math.Log10(v);
        }
        public double RevCalc(double v)
        {
            return Math.Pow(10, v);
        }
    }

    //乘以系数的坐标系
    public class CoefficientAxis
    {
        private double _coeff = 1;
        public CoefficientAxis(double coeff)
        {
            if (coeff == 0)
                return;
            this._coeff = coeff;
        }
        public double GetCoeff()
        {
            return this._coeff;
        }
        public double Calc(double v)
        {
            if (_coeff == 1)
                return v;
            var trn_v = v * _coeff;
            if (trn_v > 8)
            {
                var int_trn_v = Math.Round(trn_v, 0);
                if (Math.Abs(int_trn_v - trn_v) < 0.02)
                    trn_v = int_trn_v;
            }

            return trn_v;
        }
        public double RevCalc(double v)
        {
            if (_coeff == 1)
                return v;

            var trn_v = v / _coeff;

            if (trn_v > 8)
            {
                var int_trn_v = Math.Round(trn_v, 0);
                if (Math.Abs(int_trn_v - trn_v) < 0.02)
                    trn_v = int_trn_v;
            }

            return trn_v;
        }
    }
}