57 lines
1.5 KiB
C#
57 lines
1.5 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using System.Text;
|
|
using System.Windows;
|
|
|
|
namespace Microsoft.Research.DynamicDataDisplay
|
|
{
|
|
/// <summary>
|
|
/// Represents a logarithmic transform of both x- and y-values.
|
|
/// </summary>
|
|
public sealed class Log10Transform : DataTransform
|
|
{
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="Log10Transform"/> class.
|
|
/// </summary>
|
|
public Log10Transform() { }
|
|
|
|
/// <summary>
|
|
/// Transforms the point in data coordinates to viewport coordinates.
|
|
/// </summary>
|
|
/// <param name="pt">The point in data coordinates.</param>
|
|
/// <returns>
|
|
/// Transformed point in viewport coordinates.
|
|
/// </returns>
|
|
public override Point DataToViewport(Point pt)
|
|
{
|
|
double x = pt.X;
|
|
double y = pt.Y;
|
|
|
|
x = x < 0 ? Double.MinValue : Math.Log10(x);
|
|
y = y < 0 ? Double.MinValue : Math.Log10(y);
|
|
|
|
return new Point(x, y);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Transforms the point in viewport coordinates to data coordinates.
|
|
/// </summary>
|
|
/// <param name="pt">The point in viewport coordinates.</param>
|
|
/// <returns>Transformed point in data coordinates.</returns>
|
|
public override Point ViewportToData(Point pt)
|
|
{
|
|
return new Point(Math.Pow(10, pt.X), Math.Pow(10, pt.Y));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the data domain of this dataTransform.
|
|
/// </summary>
|
|
/// <value>The data domain of this dataTransform.</value>
|
|
public override DataRect DataDomain
|
|
{
|
|
get { return DataDomains.XYPositive; }
|
|
}
|
|
}
|
|
}
|