Welcome to the home page of Isard.

Last update: sep 25, 2002

Cette page existe aussi en Français ! (parfois obsolète...)

What is Isard ?

Isard is an interactive geometry software written in Smalltalk by Jean-Sébastien Roy during the years 1996-1997, now being released (and sometimes updated).

Isard enable to create and interactively manipulate many kinds of geometric figures.

You can download it here: Isard-1.9.zip. This version only works under VisualWorks 7 (which is quite buggy on my Mac as of september 24, 2002. EPS export may not work on a Mac).
The previous version (Isard-1.8.zip) works under VisualWorks 3.0 NC and VisualWorks 5i and should work under VisualWorks 2.5 too.

To get VisualWorks NonCommercial for free, see the Cincom's VisualWorks downloads page.
Available on: Linux (X86), Digital Unix (Alpha), IBM AIX, HP-UX, SGI IRIX, Sun Solaris (SPARC), Windows 95/NT (X86) and MacOS (PowerPC)) !
If you want to see how VisualWorks looks like, have a look at this screenshot (1280x960).

To export figures as GIF files, VisualWave is needed (included in the download above). Do not hesitate to write me if you encounter any problem.
The previous versions are still available.

Version history:

1.9 (sep 24, 2002): VisualWorks 7 compatibility.
1.8 (mar 6, 2000): Saving as EPS is improved. Miscelanous improvements.
1.7 (feb 28, 2000): Automatically updated commentary. Some bugs corrected.
1.6 (feb 26, 2000): A few fixes. Automatically generated and editable commentaries.
1.5 (jan 5, 2000): Corrected a bug in the main menu. The main menu is improved. Added two examples.
1.4 (dec 27, 1999): Loading the parcel (without loading VisualWave first) resulted in an error. It's fixed now.
1.3 (dec 26, 1999): Miscellaneous PostScript rendering bugs fixed.
1.2 (dec 23, 1999): Saves as color EPS files (instead of grayscale), Double buffering is optional, prerequisites reduced
1.1 (dec 20, 1999): GIF Export.
1.0 (nov 6, 1999): First version widely available.

To do:

- HTML export - PDF export - add new examples
- comment examples

Note:

There is a little bug on PC that prevents GIF export (at least on the PC I tried it on). The bug does not show up if the display is in 24bits. You should try various display settings.

Acknowledgments:

Thierry Fuhs, who taught me Smalltalk.
Travis Griggs: optional double buffering, ENVY version, french to english translation of Isard classes.

Isard Manual

You can read the online manual.

A few examples:

Isard can save figures as either encapsulated PostScript files or uncompressed GIF files.
These are low resolution images. Below each image are links to high resolution images and encapsulated PostScript files.
High resolution images are EPS files rendered using MacGhostScript or MacGhostView, then scaled down and saved to PNG by GraphicConverter.
(If you do not see the images, your browser do not support the PNG format, which now replace the compressed GIF format, which is not free anymore !)

Bissectrices:

Bissectrices
[ Hi-Res | EPS ]

Centre du cercle de Taylor:

Centre du cercle de Taylor
[ Hi-Res | EPS ]

Orthocentre:

Orthocentre
[ Hi-Res | EPS ]

Cercle d'Euler:

Cercle d'Euler
[ Hi-Res | EPS ]

Limaçon de Pascal:

Limaçon de Pascal
[ Hi-Res | EPS ]

Droite de Newton / Théorème de Mélénaüs:

Droite de Newton / Théorème de Mélénaüs
[ Hi-Res | EPS ]

Parabole:

Parabole
[ Hi-Res | EPS ]