private Variable(double value,
Dictionary<Dimension, int> compositeDimension,
Dimension dimension,
bool isCompositeDimension)
{
this.value = value;
this.complexDimension = compositeDimension;
this.dimension = dimension;
this.isComplexDimension = isCompositeDimension;
}
internal KnownUnit(IUnitSystem system, double factor, Dimension dimension, string symbol, string name,
bool inherentPrefix)
: base(system, factor, dimension)
{
Check.Argument(symbol, nameof(symbol)).IsNotNull();
Check.Argument(name, nameof(name)).IsNotNull();
this.Symbol = symbol;
this.Name = name;
if (inherentPrefix)
{
this.DeriveInherentFactorAndBaseSymbol(symbol);
}
else
{
this.InherentFactor = 1;
this.BaseSymbol = symbol;
}
}
private static Variable Convert(Variable v, double coefficient, Dimension si, Dimension notSi)
{
if (!v.IsComplexDimension)
{
return new Variable(v.Value * coefficient, si);
}
else
{
var dimension = CloneDimension.Clone(v.ComplexDimension);
var power = dimension[notSi];
dimension.Remove(notSi);
dimension.Add(si, power);
if (power > 0)
{
return new Variable(v.Value * Math.Pow(coefficient, power), dimension);
}
else
{
return new Variable(v.Value / Math.Pow(coefficient, power * (-1)) , dimension);
}
}
}
public Unit CreateUnit(double factor, Dimension dimension)
{
// Prefer returning a known unit
KnownUnit known;
if (this.units.TryGetValue(Tuple.Create(factor, dimension), out known))
{
return known;
}
return this.unitFactory.CreateUnit(this, factor, dimension);
}
public Variable(double value, Dimension dimension)
{
this.value = value;
this.dimension = dimension;
}
internal KnownUnit(IUnitSystem system, double factor, Dimension dimension, string symbol, string name)
: this(system, factor, dimension, symbol, name, false)
{
this.Symbol = symbol;
}
public Unit CreateUnit(double factor, Dimension dimension)
{
// Prefer returning a known or coherent unit
KnownUnit known;
Unit coherent;
if (this.units.TryGetValue(Tuple.Create(factor, dimension), out known))
{
return known;
}
else if(factor.Equals(1) && this.coherentUnits.TryGetValue(dimension, out coherent))
{
return coherent;
}
return this.unitFactory.CreateUnit(this, factor, dimension);
}