public static Variable Minus(Variable v1, Variable v2)
{
Variable newV2;
if (v2.IsComplexDimension)
{
newV2 = new Variable(v2.Value * (-1), CloneDimension.Clone(v2.ComplexDimension));
}
else
{
newV2 = new Variable(v2.Value * (-1), v2.Dimension);
}
return(ReturnVariable(v1, newV2));
}
public static Variable Multiplication(Variable v1, Variable v2)
{
var newV1 = toSiConvertor.Convert(v1);
var newV2 = toSiConvertor.Convert(v2);
var siDimensionV1 = Expan(newV1);
var siDimensionV2 = Expan(newV2);
var compositeDimension = CloneDimension.Clone(siDimensionV1);
foreach (var item in siDimensionV2)
{
if (compositeDimension.ContainsKey(item.Key))
{
if (compositeDimension[item.Key] + item.Value != 0)
{
compositeDimension[item.Key] += item.Value;
}
else
{
compositeDimension.Remove(item.Key);
}
}
else
{
compositeDimension.Add(item.Key, item.Value);
}
}
double newValue = newV1.Value * newV2.Value;
if (compositeDimension.Count != 0)
{
return(new Variable(newValue, DimensionConvertor.Narrow(compositeDimension)));
}
else
{
return(new Variable(newValue, Si.ND));
}
}
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 Variable Convert(Variable v)
{
if (!v.IsComplexDimension && !v.Dimension.IsSi)
{
return(convertors[v.Dimension](v));
}
else if (v.IsComplexDimension)
{
var newV = new Variable
(v.Value,
CloneDimension.Clone(v.ComplexDimension));
foreach (var item in v.ComplexDimension)
{
if (!item.Key.IsSi)
{
newV = convertors[item.Key](newV);
}
}
return(newV);
}
return(v);
}
