internal bool BelongsToShortestRange(DirectionRange <TAlgebraicNumber> directions)
{
var determinant = directions.Start.Determinant(directions.End);
if (_calculator.IsStrictlyPositive(determinant))
{
return(_calculator.IsStrictlyPositive(directions.Start.Determinant(this)) &&
_calculator.IsStrictlyPositive(Determinant(directions.End)));
}
if (_calculator.IsNegative(determinant))
{
return
(_calculator.IsStrictlyNegative(directions.Start.Determinant(this)) &&
_calculator.IsStrictlyNegative(Determinant(directions.End)));
}
return(false);
}
public static bool IsStrictlyGreaterThan <TAlgebraicNumber>(
this IAlgebraicNumberCalculator <TAlgebraicNumber> calculator,
TAlgebraicNumber number1,
TAlgebraicNumber number2)
{
if (calculator is null)
{
throw new ArgumentNullException(nameof(calculator));
}
return(calculator.IsStrictlyNegative(calculator.Subtract(number2, number1)));
}
public static TAlgebraicNumber Abs <TAlgebraicNumber>(
this IAlgebraicNumberCalculator <TAlgebraicNumber> calculator,
TAlgebraicNumber number)
{
if (calculator is null)
{
throw new ArgumentNullException(nameof(calculator));
}
return(calculator.IsStrictlyNegative(number)
? calculator.Opposite(number)
: number);
}