Tiling display three different parts: the toolbox, the working zone and the result zone.



Using tools one create and modify strings into the fundemental zone (of the chosen wallpaper group) displayed into the working zone, result knot is diusplayed in real time.

Choose a wallpaper group :

In the menu "File – New…" choose the group (yes, I have implemented only 7 out of the 17 possible group)

Add a string :

There is three kind of string (second line of the toolbox) their availibility depend on the choosen wallpaper group.)

• Loop into the fundemental zone,
• String starting and ending on a miror-like border,
• String starting on an identified border and ending on the same point on the other identified border.

Modify a string :

• The arrow tool allows you to select a dot, move it or select a string.
• Add a dot to an existing string
• Add a dot to an exisitng string on an identified border of the fundemental zone (this is not possible on all wallpaper group)

Additional tools when an object is selected :

• On can delet a selected dot or string,
• On can change the width, the color and the gap size where a string stop before an intersection, when a string is selected.

Options :

"Option" menu allows you to

• Keep the last tool selected once used (by default the arrow is automatically re-selected)
• choos the zoom level of the result zone.

SAve, print :

"File" menu allows you to

• save the current project into a .till file (pseudo xml).
• Open a project out of a .till file
• Generate PostScript file (high resolution version of the knot).
• Print the knot (This action requieres a PostScript printer)

Advices:
This version do not prevent collision beween dots, if 2 dots are too close (with respect to the string width) this may lead to misbehavior into the plot.

PostScript image are way much detailled than the drawing into the result zone.