/// <summary>
/// Slope of the curve in local coordinates about the local origin that corresponds to the parametric coordinate given.
/// </summary>
/// <param name="relativePosition">The relative position, s. Relative position must be between 0 and 1.</param>
/// <returns>System.Double.</returns>
public virtual double SlopeByPosition(double relativePosition)
{
double xPrime = xPrimeByParameter(relativePosition);
double yPrime = yPrimeByParameter(relativePosition);
return(GeometryLibrary.SlopeParametric(xPrime, yPrime));
}
/// <summary>
/// Slope of the curve in local coordinates about the local origin that corresponds to the parametric coordinate given.
/// </summary>
/// <param name="angleRadians">Parametric coordinate in radians.</param>
/// <returns>System.Double.</returns>
public virtual double SlopeByAngle(double angleRadians)
{
double xPrime = xPrimeByParameter(angleRadians);
double yPrime = yPrimeByParameter(angleRadians);
return(GeometryLibrary.SlopeParametric(xPrime, yPrime));
}
public static void SlopeParametric_Throws_DivideByZeroException(double xPrime, double yPrime)
{
Assert.Throws <DivideByZeroException>(() => GeometryLibrary.SlopeParametric(xPrime, yPrime));
}
public static void SlopeParametric(double xPrime, double yPrime, double expected)
{
double result = GeometryLibrary.SlopeParametric(xPrime, yPrime);
Assert.AreEqual(expected, result, Tolerance);
}
