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using System;
using System.Collections.Generic;
using System.Linq;
namespace grapher.Models.Calculations
{
public class AccelChartData
{
#region Constructors
public AccelChartData()
{
AccelPoints = new SortedDictionary<double, double>();
VelocityPoints = new SortedDictionary<double, double>();
GainPoints = new SortedDictionary<double, double>();
OutVelocityToPoints = new Dictionary<double, (double, double, double)>();
LogToIndex = new int[701];
}
#endregion Constructors
#region Properties
public SortedDictionary<double, double> AccelPoints { get; }
public double MaxAccel { get; set; }
public double MinAccel { get; set; }
public double MaxGain { get; set; }
public double MinGain { get; set; }
public SortedDictionary<double, double> VelocityPoints { get; }
public SortedDictionary<double, double> GainPoints { get; }
public int[] LogToIndex { get; }
public Dictionary<double, (double, double, double)> OutVelocityToPoints { get; }
#endregion Properties
#region Methods
public void Clear()
{
AccelPoints.Clear();
VelocityPoints.Clear();
GainPoints.Clear();
OutVelocityToPoints.Clear();
Array.Clear(LogToIndex, 0, LogToIndex.Length);
}
public (double, double, double) FindPointValuesFromOut(double outVelocityValue)
{
if (OutVelocityToPoints.TryGetValue(outVelocityValue, out var values))
{
return values;
}
else
{
var velIdx = GetVelocityIndex(outVelocityValue);
values = (VelocityPoints.ElementAt(velIdx).Key, AccelPoints.ElementAt(velIdx).Value, GainPoints.ElementAt(velIdx).Value);
OutVelocityToPoints.Add(outVelocityValue, values);
return values;
}
}
public (double, double, double) ValuesAtIndex(int index)
{
return (AccelPoints.ElementAt(index).Value, VelocityPoints.ElementAt(index).Value, GainPoints.ElementAt(index).Value);
}
public (double, double, double) ValuesAtInVelocity(double inVelocity)
{
return (AccelPoints[inVelocity], VelocityPoints[inVelocity], GainPoints[inVelocity]);
}
public int GetVelocityIndex(double outVelocityValue)
{
if (outVelocityValue < 0)
{
throw new ArgumentException($"invalid velocity: {outVelocityValue}");
}
var log = Math.Log10(outVelocityValue);
if (log < -2)
{
log = -2;
}
else if (log > 5)
{
log = 5;
}
log = log * 100 + 200;
var velIdx = LogToIndex[(int)log];
return velIdx;
}
#endregion Methods
}
}
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