Curly Logo now works in Opera, and in particular on the Nintendo Wii Internet Channel (which is Opera). A couple of minor things don't work quite right yet: the arrow used to show what an expression evaluates to renders as a box on my Mac; settbg doesn't work pending a portable implementation of atob (Opera doesn't have atob). Exposes some rendering bugs in Opera.

Dr Adam Chalcraft contributes his Kite and Dart tiling example to the Curly Logo gallery.

Double precision (64-bit IEEE) arithmetic is now used to compute the motion of the turtle. Previously SVG routines were used for this and they were discovered to use single precision (32-bit) which was inadequate for some applications. Meh. The code (in source and delivered) is now smaller.

Curly Logo now executes some long-running drawing code much much faster. Specifically, codes that draw shapes with many connected lines run much faster. Technically this is achieved by only using the SVG DOM once per path rather than once per line segment. The Dragon from the gallery is a good example of the sort of program that is improved; this figure has more than 8000 lines in one connected path. On my Safari running time improves from about 25 seconds to about 5 seconds; on my Firefox the new running time is about 25 seconds (versus about 3 minutes with the old code?).

Curly Logo now loads onto the browser faster. It's hard for me to say by how much, because all the tools I could use to measure it are rubbish. I can definitely notice it. Implemented by packing all the various assets (JavaScript files mostly) into one big file.

Curly Logo now implements history for the command line. Previous commands can be recalled with the up and down arrow keys, just like you would expect. Jesse Ruderman's JavaScript Shell was very useful inspiration for implementing this.

The implementation of the BEEP command has been changed so that it now uses MIDI. This saves about 1KB of space in the implementation and means that it works on Firefox. Sort of. See my notes on the original implementation of this feature.

Curly Logo now has a news feed. Subscribe to the feed, in atom format, at http://www.amberfrog.com/logo/news/atom/.

random N evaluates to a random whole number from 0 up to, but not including, N. (random P Q) evaluates to a random whole number from P to Q inclusive (just like UCB Logo). random list, like random [tan navy], will evaluate to a randomly selected member of the list. Like pick from LCSI Logo.

Experimental (and only works in Firefox). save [foo] saves the previously defined procedure named foo (in a cookie); load [foo] loads it back again.

The input box on Curly Logo now accepts multiple lines, which is very handy when pasting code in.

Curly Logo now works on Safari (available for OS X and Windows). Safari version 3 that is (which is standard on OS X 10.4.11 but not earlier). No SVG on the iPhone so I assume it doesn't work.