Thanks for the reply.

I wasn't trying to answer Paul's question. It just brought to mind something I have been thinking about off and on for a while: could we use Turtle Art as a stepping stone into Etoys in a manner similar to what I did with Berkeley Logo. Leverlig the s-expression interface sounds like the easiest path. Another route would be to just re-implement Turtle Art in Etoys itself.

I'm on somewhat of a mission right now to see what roads to more complete programming environments I can open with Turtle Art.

-walter

On Mon, Feb 9, 2009 at 6:15 AM, Bert Freudenberg bert@freudenbergs.de wrote:

On 08.02.2009, at 20:22, Walter Bender wrote:

...

So if I wanted to export a Turtle Art project to Etoys... how would you suggest I get started?

-walter

I don't think that's what Paul wanted, but an interesting question nonetheless ...

Well, I'd start by making an Etoys project that is equivalent to a TA project. The Turtle would be an Etoys sketch, box1 and box2 would be variables of that sketch, stack1 and stack2 separate scripts. The world should be set to origin-at-center. Most TA blocks have a 1-to-1 mapping to Etoys tiles, some non-straightforward ones are arc, set shade, print, wait, forever, repeat, stop. In particular the control structures require some thought, "forever" maps naturally to a ticking Etoys script, but the execution semantics in Etoys are somewhat different so making wait and stop work correctly is not trivial. Once you have that you could switch the tile script to textual mode and try to export from Turtle Art that textual representation. To get the exported text into Etoys I'd suggest copy-and-paste first.

To later actually export an Etoys project the only viable way would be Yoshiki's s-expression project format, which is a high-level textual description of a project, rather than the default binary object dump. IIRC we disabled the textual s-expression loader however, to avoid parsing overhead it expects a binary s-expression representation. Yoshiki knows the details.

Anyway, you should post to the etoys list, someone might have much better ideas than me.

• Bert -

...

On Sun, Feb 8, 2009 at 10:56 AM, Bert Freudenberg bert@freudenbergs.de wrote:

...

On 07.02.2009, at 14:13, Paul Schulz wrote:

...

• Is there another application I could use?

Did you try Etoys? It's the "shooting star" icon.

• Bert -

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