Release Notes GeoGebra 4.2

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This page gives an overview of the new features in GeoGebra 4.2 since version 4. Please see our fully revised GeoGebra Help document for more detailed descriptions of each new tool and command.

GeoGebra 4.2 is currently in beta test. Details of how to run it are here: http://www.geogebra.org/forum/viewtopic.php?f=22&t=23208

Compatibility with GeoGebra 3.2

Details about compatibility with GeoGebra 3.2 and 4.0 can be found here: http://wiki.geogebra.org/en/Manual:Compatibility

Running on XO OLPC / Sugar

http://wiki.sugarlabs.org/go/Activities/GeoGebra

CAS View

http://wiki.geogebra.org/en/CAS_View

General

  • Algebra View: options to sort by Construction Order & by Layer
  • Settings -> Advanced -> Use Path and Region Parameters: "On" makes Points on objects keep their Path Parameter when the parent object is moved (the behaviour in GeoGebra 4), "Off" makes them stay as close as possible to their old position.
  • Double-click on a View's title bar to maximize it
  • Logical implication operator added (-> or→) eg a = false → true
  • Alt-drag on a parabola to rescale it (keeping the vertex fixed)
  • When dragging a parabola, the vertex now snaps to grid (if appropriate)
  • Buttons can be resized, be made bold & italic or include an image
  • Default polarity for mouse wheel zoom changed
  • Better (localizable) dynamic texts created by the Area / Perimeter Tools (eg Area of c = 3.14)
  • String comparison (eg "AA" < "AB" gives true)
  • Improved axis labeling when grid is showing
  • Ability to lock xAxis:yAxis ratio
  • Set defaults for Inequalities
  • All the FitXXX commands can be used on freehand functions

Improved Tools

You can now just drag a shape to translate it

New Tools

New Functions

  • psi(x)

The Digamma function

  • polygamma(m, x)

The Polygamma function is the (m+1)th derivative of the natural logarithm of the Gamma function, gamma(x) (m=0,1)

  • sinIntegral(x)

The Sine Integral function

  • cosIntegral(x)

The Cosine Integral function

  • expIntegral(x)

The Exponential Integral function

New Commands

New Keyboard & Mouse Shortcuts

  • <Ctrl><Shift>E: Open Object Properties View
  • <Ctrl><Shift>B: Export as GeoGebraWeb to Clipboard
  • In Text Tool, <Alt>Left, <Alt>Right to move in/out of formula boxes, <Alt>Enter, <Alt>Up, <Alt>Down to create a new formula box

Description of all Keyboard Shortcuts

New Applet Parameters

Description of all GeoGebra Applet Parameters

New Command Line Arguments

If you use command line arguments, make sure you allocate enough memory, eg:
java -Xms32m -Xmx512m -jar geogebra.jar --export=bitmap.png --dpi=300 spiral.ggb

--export=<File> Exports the Graphics View to SVG/PNG/PDF/EMF/EPS as determined by the extension
--dpi=<Integer> (only used in conjunction with --export)

Description of all GeoGebra Command Line Arguments

New JavaScript commands

  • registerLoggerListener(functionName), unregisterLoggerListener(functionName) to access Vernier Go!Motion USB Logger
  • registerPenListener(functionName), unregisterPenListener(functionName) to handle pen tool usage
  • drawToImage(label,x[],y[]), clearImage(label) to draw
  • String evalGeoGebraCAS(String casCommand)
  • String evalGeoGebraCAS(String casCommand, boolean printDebugInfo)
  • void setPenColor(int red, int green, int blue); values 0 - 255
  • void setPenSize(int size); sets pen size size in pixels
  • int getPenSize(); return pen size in pixels
  • String getPenColor(); returns pen color as RGB hex string (eg #AB1234)

Description of all GeoGebra JavaScript Methods

GeoGebra's XML File Format

GeoGebra's XML file format is documented at Reference:XML

License

You are free to copy, distribute and transmit GeoGebra for non-commercial purposes. Please see the GeoGebra license for details: http://www.geogebra.org/download/license.txt

es:Notas_Lanzamiento_de_GeoGebra_4.2

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