/// <summary>
/// Returns the output value from the noise module given the
/// (latitude, longitude) coordinates of the specified input value
/// located on the surface of the sphere.
/// </summary>
/// <param name="lat">The latitude of the input value, in degrees.</param>
/// <param name="lon">The longitude of the input value, in degrees.</param>
/// <returns>The output value from the noise module.</returns>
/// <remarks>
/// Use a negative latitude if the input value is located on the
/// southern hemisphere.
///
/// Use a negative longitude if the input value is located on the
/// western hemisphere.
/// </remarks>
public double GetValue(double lat, double lon)
{
double x, y, z;
NoiseMath.LatLonToXYZ(lat, lon, out x, out y, out z);
return(Source.GetValue(x, y, z));
}
public void LatLonTest(double lat, double lon, double expX, double expY, double expZ)
{
NoiseMath.LatLonToXYZ(lat, lon, out double x, out double y, out double z);
Assert.Equal(expX, x, 6);
Assert.Equal(expY, y, 6);
Assert.Equal(expZ, z, 6);
}
public void Math_LatLonToXYZ_Test_2()
{
double x, y, z;
NoiseMath.LatLonToXYZ(-51, 63, out x, out y, out z);
double expectedX = 0.285705,
expectedY = -0.777146,
expectedZ = 0.560729;
Assert.AreEqual(expectedX, Math.Round(x, 6));
Assert.AreEqual(expectedY, Math.Round(y, 6));
Assert.AreEqual(expectedZ, Math.Round(z, 6));
}
public void Math_LatLonToXYZ_Test_1()
{
double x, y, z;
NoiseMath.LatLonToXYZ(0, 0, out x, out y, out z);
double expectedX = 1,
expectedY = 0,
expectedZ = 0;
Assert.AreEqual(expectedX, x);
Assert.AreEqual(expectedY, y);
Assert.AreEqual(expectedZ, z);
}
public void Math_LatLonToXYZ_Test_4()
{
double x, y, z;
NoiseMath.LatLonToXYZ(45, 45, out x, out y, out z);
double expectedX = 0.5,
expectedY = 0.707107,
expectedZ = 0.5;
Assert.AreEqual(expectedX, Math.Round(x, 6));
Assert.AreEqual(expectedY, Math.Round(y, 6));
Assert.AreEqual(expectedZ, Math.Round(z, 6));
}
/// <summary>
/// Returns the output value from the noise module given the
/// (latitude, longitude) coordinates of the specified input value
/// located on the surface of the sphere.
/// </summary>
/// <param name="lat">The latitude of the input value, in degrees.</param>
/// <param name="lon">The longitude of the input value, in degrees.</param>
/// <returns>The output value from the noise module.</returns>
/// <remarks>
/// Use a negative latitude if the input value is located on the
/// southern hemisphere.
///
/// Use a negative longitude if the input value is located on the
/// western hemisphere.
/// </remarks>
public double GetValue(double lat, double lon)
{
NoiseMath.LatLonToXYZ(lat, lon, out double x, out double y, out double z);
return(this.Source.GetValue(x, y, z));
}
