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using System.Diagnostics;
namespace LibNoise.Operator
{
/// <summary>
/// Provides a noise module that applies a scaling factor and a bias to the output
/// value from a source module. [OPERATOR]
/// </summary>
public class ScaleBias : ModuleBase
{
#region Constructors
/// <summary>
/// Initializes a new instance of ScaleBias.
/// </summary>
public ScaleBias()
: base(1)
{
Scale = 1;
}
/// <summary>
/// Initializes a new instance of ScaleBias.
/// </summary>
/// <param name="input">The input module.</param>
public ScaleBias(ModuleBase input)
: base(1)
{
Modules[0] = input;
Scale = 1;
}
/// <summary>
/// Initializes a new instance of ScaleBias.
/// </summary>
/// <param name="scale">The scaling factor to apply to the output value from the source module.</param>
/// <param name="bias">The bias to apply to the scaled output value from the source module.</param>
/// <param name="input">The input module.</param>
public ScaleBias(double scale, double bias, ModuleBase input)
: base(1)
{
Modules[0] = input;
Bias = bias;
Scale = scale;
}
#endregion
#region Properties
/// <summary>
/// Gets or sets the bias to apply to the scaled output value from the source module.
/// </summary>
public double Bias { get; set; }
/// <summary>
/// Gets or sets the scaling factor to apply to the output value from the source module.
/// </summary>
public double Scale { get; set; }
#endregion
#region ModuleBase Members
/// <summary>
/// Returns the output value for the given input coordinates.
/// </summary>
/// <param name="x">The input coordinate on the x-axis.</param>
/// <param name="y">The input coordinate on the y-axis.</param>
/// <param name="z">The input coordinate on the z-axis.</param>
/// <returns>The resulting output value.</returns>
public override double GetValue(double x, double y, double z)
{
Debug.Assert(Modules[0] != null);
return Modules[0].GetValue(x, y, z) * Scale + Bias;
}
#endregion
}
}
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