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using System.Diagnostics;
namespace LibNoise.Operator
{
/// <summary>
/// Provides a noise module that uses three source modules to displace each
/// coordinate of the input value before returning the output value from
/// a source module. [OPERATOR]
/// </summary>
public class Displace : ModuleBase
{
#region Constructors
/// <summary>
/// Initializes a new instance of Displace.
/// </summary>
public Displace()
: base(4)
{
}
/// <summary>
/// Initializes a new instance of Displace.
/// </summary>
/// <param name="input">The input module.</param>
/// <param name="x">The displacement module of the x-axis.</param>
/// <param name="y">The displacement module of the y-axis.</param>
/// <param name="z">The displacement module of the z-axis.</param>
public Displace(ModuleBase input, ModuleBase x, ModuleBase y, ModuleBase z)
: base(4)
{
Modules[0] = input;
Modules[1] = x;
Modules[2] = y;
Modules[3] = z;
}
#endregion
#region Properties
/// <summary>
/// Gets or sets the controlling module on the x-axis.
/// </summary>
public ModuleBase X
{
get { return Modules[1]; }
set
{
Debug.Assert(value != null);
Modules[1] = value;
}
}
/// <summary>
/// Gets or sets the controlling module on the z-axis.
/// </summary>
public ModuleBase Y
{
get { return Modules[2]; }
set
{
Debug.Assert(value != null);
Modules[2] = value;
}
}
/// <summary>
/// Gets or sets the controlling module on the z-axis.
/// </summary>
public ModuleBase Z
{
get { return Modules[3]; }
set
{
Debug.Assert(value != null);
Modules[3] = value;
}
}
#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);
Debug.Assert(Modules[1] != null);
Debug.Assert(Modules[2] != null);
Debug.Assert(Modules[3] != null);
var dx = x + Modules[1].GetValue(x, y, z);
var dy = y + Modules[2].GetValue(x, y, z);
var dz = z + Modules[3].GetValue(x, y, z);
return Modules[0].GetValue(dx, dy, dz);
}
#endregion
}
}
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