Changes from Version 2.3

• Fixed bug in Markers.AddMarkers method
• Fixed stupid bug with the rotate text ImageFilter found in the RTextLine class. Only byte color models would rotate text.
• Added "stride" variable in DataSet Class. This specifies the stride of the data.
• Added a VectorSet class an extension of the DataSet class that allows the plotting of vector fields.

Changes from Version 2.2

• Added the RTextLine class that allows for text rotation in multiples
• of 90 degrees.
• The axis class now has rotated titles on vertical axis.
• Fixed minor bugs in the html code pointing to source
• Added the double buffering example, example2a
• Added the RTextLine example, example4a

Changes from Version 2.1

• The graph class library is now compiled as a package called "graph"
• Some method names have changed to be consistent across all classes.
• The markers methods have been moved into the Marker class
• It is now possible for markers to be defined within java programs
• The BuildGraph class recognises most additions to the graph package.
• The BuildGraph class now correctly plots more than one dataset.
• Numerous error corrections. But the main bug fixed is the display problem on Windows. The package should work fine on Windows, Macs, Suns, Dec Alphas and Sgis. All the machines I have managed to test the package on.
• The rubber-band drag box now works correctly in class G2Dint. The colors are XORed correctly.
• All the documentation is produced by javadoc

Additions:

• All the classes have new methods and variables to control behaviour.
  • The graph backgound color can be defined
  • The data window background color can be defined
  • Plots can force an aspect ratio of 1. This means circles will appear as circles not ellipses.
  • Textline class has a parseDouble() method to allow the formating doubles when converted to strings.
• A SpecialFunction class as an extension to the java.lang.Math class. Though all functions are defined in the Java language.
• The SpecialFunction class contains the definition of Physical constants. Such as Boltzman constant, Speed of Light, Gravitational Constant, Gas Constant etc. This is incomplete and reflects more my own interests.
• The SpecialFunction class defines the following functions log10(), sinh(), cosh(), tanh(), asinh(), acosh(), atanh(), j0(), j1(), jn(), y0(), y1(), and yn().
• The ParseFunction class. This class will parse a function definition containing at most 3 independent variables. The getResult methods will return the function value.

Changes from Version 2.0

The G2Dint class has a new popup window that allows the user to modify the plot range manually. All popup windows can be closed by hitting the 'h' key in the window. The getClosestPoint method now works correctly.

The event interface has been changed to use the predefined Component event methods. This makes it easy for child classes to catch events without having to redefine the entire event handler.

The LoadData class has had a number of methods renamed though functionality remains the same.

The BuildGraph class does not have the ability to call the Contour class.

Changes from Version 1.0

I apologize to everyone who has sent me mail that I have failed to answer. As I have limited access to computer resources I have found I have had to maximise my time - answering questions/complaints has low priority at the moment. Sorry, though don't get me wrong I like to hear from people. So please send mail if you have found the class library usefull (just don't expect a quick response).

All classes and examples have been tested using Netscape 2.0b6 on an SGI. How they will perform on other machines I do not know.

Bug Fixes

Additions

• A new class LoadData. This class loads data from a file, but does it from a seperate thread. This means that the applet will not freeze while data is being loaded. The class will also force the plot to refreshed as data is loaded.
• Additions to the G2Dint class are-
  • a popup frame that displays the cursor position in plot coordinates.
  • a popup frame that displays the data point closest to the cursor.
• A new class TextLine. This class will draw a line of text at a given pixel position. It combines some of the methods of Font and FontMetrics. The Font and color for the line of text can be specified. The text is parsed so that subscripting and superscripting commands are recognised.
• A new class ScanWord. This is an extension of the StreamTokenizer class but allows Keywords to be defined and recognised in the input stream.
• A new class BuildGraph an extension of the ScanWord class. This class reads a plot description file and can build the plot and load the data. This means without learning Java programming general plots can be incorporated into a web page simply. Example 5 is an example of using the BuildGraph class.

Leigh Brookshaw