/// <summary>
/// Generates an output value given the coordinates of the specified input value.
/// </summary>
/// <exception cref="NullReferenceException">Thrown if NoiseModule1 or NoiseModule2 are null.</exception>
/// <param name="x">The x coordinate of the input value.</param>
/// <param name="y">The y coordinate of the input value.</param>
/// <param name="z">The z coordinate of the input value.</param>
/// <returns>The output value.</returns>
public override double GetValue(double x, double y, double z)
{
if (NoiseModule1 == null || NoiseModule2 == null)
{
throw new NullReferenceException("NoiseModule1 or NoiseModule2 are null.");
}
return(NoiseModule1.GetValue(x, y, z) + NoiseModule2.GetValue(x, y, z));
}
/// <summary>
/// Generates an output value given the coordinates of the specified input value.
/// </summary>
/// <param name="x">The x coordinate of the input value.</param>
/// <param name="y">The y coordinate of the input value.</param>
/// <param name="z">The z coordinate of the input value.</param>
/// <returns>The output value.</returns>
public override double GetValue(double x, double y, double z)
{
double v0 = NoiseModule1.GetValue(x, y, z);
double v1 = NoiseModule2.GetValue(x, y, z);
double alpha = (ControlModule.GetValue(x, y, z) + 1.0) / 2.0;
return(Interp.LinearInterp(v0, v1, alpha));
}