squeakland January 2004

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23 participants
33 discussions

[Q]Some questions about scripting an eToy player
by Darius Clarke 16 Jan '04

16 Jan '04

Dear Squeakland team, I've developed a couple questions recenty: - Which Morphs/eToy players have extra scripts attached to them? Here is such an example, the Text morph whose menu is attached here to this message. - Where is this documented so I can find out such things for myself? _______ - How can I change the #rotationCenter in an eToy player's script? - The the #rotationCenter in relation too what point in the player? _______ - Does the Croquet mailing list still work? http://mail.opencroquet.org/pipermail/croquet-user/ _______ - Where do I send my "SqueakDebug-3251534861.log" files? _______ Thank you for your hard work. Cheers, Darius

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RE: [Squeakland] Re: [Q]Some questions about scripting an eToy player
by Scott Wallace 15 Jan '04

15 Jan '04

Hi, Darius, I don't have the perfect answer to your query (perhaps Andreas will) but here are some observations that may be useful: (1) An easy way to achieve the effect you want, I think, would be to capture your gradient-graced sphere as a SketchMorph. The reason is that there is a special feature available only to SketchMorphs that allows you to specify that their appearance not change as they rotate. To do this: * First create your object as an EllipseMorph with gradient fill, as before. * Then obtain a SketchMorph from it using one of the new morph... grab... commands from the desktop menu. * Remove the transparent pixels surrounding the resulting SketchMorph by using painting... erase pixels of color.. from its halo menu. * The result is a SketchMorph of exactly the same size and shape and appearance as your original. * Go to the SketchMorph's halo menu, choose painting... set rotation style... don't rotate. Now you have a ball whose appearance will not change as you change its heading from a Viewer or from running code. (2) The intent of the rotation code is to take the *complete* appearance of the object when facing in its "forward direction" and to rotate it rigidly by the required number of degrees. That "complete" appearance includes drop-shadow, gradient direction, etc. What you are asking for is directly at odds with that. If you don't want to use the SketchMorph trick outlined above, then the best alternative I can think of is for you to give the object a ticking textual script that serves to counteract the effect of the rotation on the gradient direction. Though I couldn't immediately and without careful thought write down a script that accomplished this, obviously it must be possible, though perhaps strenuous. The script would presumably have code of the form "Sphere costume fillStyle direction: foo" or something similar. (3) A further thought is: if you want the appearance to be unchanged, perhaps you shouldn't be changing the heading in the first place. An alternative is to forego the built-in heading-changing feature such as "turn-by" and to do all your motion-related computations more directly instead. Though this obviously has its price, and the resulting scripts might be too obscure. Hope these observations help, or at least don't hurt ;-) Cheers, -- Scott At 4:13 PM -0800 1/14/04, Darius Clarke wrote: > >Rotating a eclipse 180¡ also rotates the gradient fill 180¡ as show >in these clips. > > > > >I'd like to keep the color side up and the shaded side down while >rotating with a script. > >Perhaps saying this another way: Can I adjust the gradient angle >with a eToy script? > >Thanks for your help. > > >Cheers, >Darius > > >-----Original Message----- > > >Also: > > - How can I keep the gradient oriented the same direction, even > >when the player is rotoated?

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Re: [Q]Some questions about scripting an eToy player
by Darius Clarke 14 Jan '04

14 Jan '04

Dear Squeakland team, > > - How can I change the #rotationCenter in an eToy player's script? > - The the #rotationCenter in relation too what point in the player? Also: - How can I keep the gradient oriented the same direction, even when the player is rotoated? Thank you for your hard work. Cheers, Darius

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A question about fractions and large integers in Etoys
by Ken Kahn 14 Jan '04

14 Jan '04

I understand that Squeak supports very large integers and exact fractions (as opposed to approximate floating point numbers). What I don't know is if and how this functionality is presented in Etoys. For example what happens when you divide 1 by 3? How is the repeated decimal expansion displayed? Or is it displayed as 1/3? Or if a child computes the factorial of 10000 how are the over 35,000 digits displayed? Thanks in advance, -ken kahn P.S. I'm writing a paper on how these issues are dealt with in ToonTalk and am writing the "related work" section.

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deficiences in projects
by ye juan 13 Jan '04

13 Jan '04

Hi, I have created a project, in which I editted a BookMorph. Now in another project, I want to directly use this BookMorph again. How can I do this? Thanks all in advance! Regards, Lulu __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Multiple projects
by Phil Firsenbaum 13 Jan '04

13 Jan '04

We're planning a little celebration of kids' Squeak work in about a month. I'm thinking about the logistics of this event and seem to remember that multiple projects can be opened and stored within memory so that each can be called up easily and quickly. Don't remember how it's done though. Thanks and Happy New Year to everyone on the list! Phil

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New updates on Squeakland
by Michael Rueger 13 Jan '04

13 Jan '04

Hi Squeaklanders! I just pushed a few more updates to Squeakland. You can load them as always by using the fetch updates link on the home page. Cheers Michael ---------- The fixes: - Eliminated the show-tabs/hide-tabs button from the nav-bar - sound improvements Enhancement: When the user clicks on the name of a sound on either a SoundTile or a SoundReadoutTile, a pop-up of available sounds is now presented, from whence the user can choose one. This can be faster and more direct (and quieter!) than cycling through the available sounds one by one. - Fixed a problem with loading a project containing projects

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image management in Squeak
by ye juan 12 Jan '04

12 Jan '04

Hi, I have a picture named "person.gif" in disk. Now I want to read it into Squeak and save it as an instance object of a class "Photo". Additionally, I add some instance variables to the class, such as "description"( what this picture describes), "date" (when it is loaded in) and etc. How could I do this? Whoever knows this, please write to me as soon as possible. I will show my sincere appreciations to you! Regards, Lulu __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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RE: [Squeakland] New User
by Mitchell, David [CC] 08 Jan '04

08 Jan '04

I heartily recommend Powerful Ideas in the Classroom by BJ Allen-Conn and Kim Rose. It is geared toward middle school, but my two sons (age 5 and 7) and I had fun going through some of the exercises. The book is geared towards instructors. It makes a nice companion to the Squeakers film. Both of these are inexpensive and available at: http://www.squeakland.org/sqmedia/sqmediahome.html I am a general Squeak enthusiast, so I have also read the other English language books on Squeak listed at: http://www.squeakland.org/sqmedia/books/squeakerbooks.html But, these are more for programmers and computer-science people. --David Mitchell -----Original Message----- From: squeakland-bounces(a)squeakland.org on behalf of Demarcopad(a)aol.com Sent: Wed 1/7/2004 12:34 PM To: squeakland(a)squeakland.org Cc: Subject: [Squeakland] New User Hello! I am a computer teacher in a K-8 school in Michigan. I am interested in learning more about how to use Squeak and in developing or acquiring some lesson plans to teach my students about this program. I signed up for this list about a week ago, and so far, I understand 'nothing' that I have read on this list. Do you have any suggestions about how I could learn more about this program, I have been to the web site and read everything there, but am still very unsure. I am willing to purchase a book and or set of lesson plans that might be good. Thanks! Pat DeMarco Holy Family School Grand Blanc, MI _______________________________________________ Squeakland mailing list Squeakland(a)squeakland.org http://squeakland.org/mailman/listinfo/squeakland

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New User
by Demarcopad＠aol.com 08 Jan '04

08 Jan '04

Hello! I am a computer teacher in a K-8 school in Michigan. I am interested in learning more about how to use Squeak and in developing or acquiring some lesson plans to teach my students about this program. I signed up for this list about a week ago, and so far, I understand 'nothing' that I have read on this list. Do you have any suggestions about how I could learn more about this program, I have been to the web site and read everything there, but am still very unsure. I am willing to purchase a book and or set of lesson plans that might be good. Thanks! Pat DeMarco Holy Family School Grand Blanc, MI

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squeakland January 2004