jcckit.transformation
Class CartesianTransformation

java.lang.Object
  jcckit.transformation.CartesianTransformation

All Implemented Interfaces:

Transformation

public class CartesianTransformation

extends java.lang.Object

implements Transformation

Two-dimensional Cartesian transformation. The two independent transformations for the x-axis and the y-axis can be logarithmic from data coordinates to device-independent coordinates in order to realize diagrams with logarithmic scales.

Author:

Franz-Josef Elmer

Constructor Summary

CartesianTransformation(boolean xLogScale, boolean yLogScale, DataPoint dataPoint1, GraphPoint graphPoint1, DataPoint dataPoint2, GraphPoint graphPoint2)
Creates an instance from the specified reference points.

Method Summary

DataPoint	transformToData(GraphPoint point) Transforms a GraphPoint into a DataPoint.
GraphPoint	transformToGraph(DataPoint point) Transforms a DataPoint into a GraphPoint.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CartesianTransformation

public CartesianTransformation(boolean xLogScale,
                               boolean yLogScale,
                               DataPoint dataPoint1,
                               GraphPoint graphPoint1,
                               DataPoint dataPoint2,
                               GraphPoint graphPoint2)

Creates an instance from the specified reference points. Note, that the reference points must differ in x and y coordinates otherwise a transformation would not be possible.

Parameters:

xLogScale - true if logarithmic x axis.

yLogScale - true if logarithmic y axis.

dataPoint1 - First reference point in data coordinates.

graphPoint1 - First reference point in device-independent coordinates.

dataPoint2 - Second reference point in data coordinates.

graphPoint2 - Second reference point in device-independent coordinates.

Throws:

java.lang.IllegalArgumentException - if transformation in at least one of both directions is not possible.

Method Detail

transformToGraph

public GraphPoint transformToGraph(DataPoint point)

Description copied from interface: Transformation

Transforms a DataPoint into a GraphPoint.

Specified by:

transformToGraph in interface Transformation

Parameters:

point - A point in data coordinates.

Returns:

point tranformed into device-independent coordinates..

transformToData

public DataPoint transformToData(GraphPoint point)

Description copied from interface: Transformation

Transforms a GraphPoint into a DataPoint.

Specified by:

transformToData in interface Transformation

Parameters:

point - A point in device-independent coordinates..

Returns:

point tranformed into data coordinates.