Interactive Geometry

SPICY is the successor of this interactive geometry software.

This site will no longer be supported - please go to the new site!

This old site is still online, because it provides many interesting interactive examples, like the one on Poncelet's theorem!

This is the 5^th pre-version of the 'interactive plane geometry applet'. Now you can use the graphical interface to make your constructions. I've added lots of other features as well, like macros and undo/redo.
But there are still some features that are only available by using the 'context' menu: just click the right mouse button or the left mouse button together with the 'Control' key to get this menu!

Poncelet's theorem is an excellent example for the use of this tool. In some weeks, we will provide a simple way to use our tool in your internet publications, just like we've done it for Poncelet's theorem.

More interesting capabilities of the tool are used to construct

• a cissoid
• a conchoid
• the limacon of Pascal,
• the lissajous figures,
• the a circle rolling on another one,
• three bar linkages,
• interesting mechanisms,
• the cake problem.

And the best is: the tool is free, you can use it right now, in the internet (and - in some weeks - in your internet publications) without paying anything. Have a lot of fun!

If you've got any suggestions or comments, please contact us.

It is now possible to use the interactive geometry tool within a scalable window. I, personally, prefer the scalable version, because you can then use the whole screen for your constructions.

In the next version, there will be features like

• additional scripting (and load/save) capabilities (e.g. more parameters)
• additional objects like
  - conics through 5 points
  - cubics through 9 points
  - ...
  

© Oliver Labs, Algebraic Geometry Group, University of Mainz, Germany

Interactive Geometry Project, impressum