DrGeo

Dr. Geo II DrGeo received an award and the INDIRE quality label [1] GNU licensed under LGPL-3.0 MCZ sources in squeaksource DrGeoII.pot | es | fr  Hilaire Fernandes, et al. and José Rodríguez see more templates or propose new

Dr. Geo II running inside of EToys on the XO

A little gallery of examples, it looks confusing, right? Geometric canvases are overlapped transparently.

And yes, various media can be mixed... Canvas in book, and images in canvas, etc.

Dr. Geo II is a complete rewrite of Dr. Geo 1.1 GTK for the Squeak/Smalltalk environment As now, loading Dr. Geo II is slow because it is shipped in source code form and compiled at load time by the OLPC Squeak/Smalltalk. In future pre-compiled version will be provided for faster load time

(From the Dr. Geo 1.1 website) Dr. Geo 1.1 is a GTK interactive geometry software. It allows one to create geometric figure plus the interactive manipulation of such figure in respect with their geometric constraints. It is usable in teaching situation with students from primary or secondary level.

Dr. Geo integrates advanced features as an integrated Scheme programming language to define scripts within a figure. The language is also used to define functionally interactive figure.

Dr. Geo is a software part of the GNU project. This means it is a free software (as free speech) and you have access to the source code under the GPL license. You can modify and distribute it as long as the same distribution license (GPL) is used. To learn more about this license and the Free Software Foundation, visit the GNU project web site or read the file COPYING in the distribution.

At the Dr. Geo gallery you will find several examples with Dr. Geo. Do not hesitate to reference your examples there.

How to install DrGeoII

To install DrGeoII, you just need to install from Browse the XO file from [2]. The bundle comes with a few examples ready to load (one-click-load)

DrGeoII is an interactive geometry framework, Morphic-based and Smalltalk programmed, which can be embedded and mixed with any existing Morph user interface element of the Squeak OLPC environment.

As the confusion between interactive geometry and vector drawing is very common, Hilaire has produced a few video recording exposing the installation and the use of the framework. Moreover the videos show how the Morph UI gives freedom to mix in a constructive manner various unrelated Morph components (user interface construction, user interface scripting between different unrelated components).

Let's revitalize the Squeak/Smalltalk/Morph jewels for the development of educative application... -- Hilaire Fernandes

How to install if it fails from Browse?

In the transition to the latest XO software release, some people have had trouble downloading and installing the Dr. Geo II bundle. If installation through Browse activity fails, try the following steps:

From the Terminal activity, remove any previous Dr. Geo II bundle:

rm -rf /home/olpc/Activities/DrGeoII.activity

Restart Sugar by pressing simultaneously Ctrl+Alt+Erase so Sugar takes notice of the removal. Then from the terminal activity do:

wget http://squeak.ofset.org/drgeo/DrGeoII.xo
sugar-install-bundle DrGeoII.xo

If /home/olpc/Activities does not exist, you can create it first:

mkdir /home/olpc/Activities

Localisation

DrGeoII is internationalised (it requires joyride>=1620 for localisation to work). To provide more translation, download the DrGeoII.pot file at the DrGeoII forge, copy it as xx.po (with xx your locale), translate and send it to hilaire [AT] ofset.org.

How to use DrGeoII in Etoys

Here are videos showing how to use DrGeoII.

See also

• Sugar Etoys