Squeak-dev August 2010

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[OT] Points of View - a tribute to Alan Kay, second printing available
by Ian Piumarta 04 Aug '10

04 Aug '10

Folks, Some of you missed the first printing of our book "Points of View -- a tribute to Alan Kay", supplies of which were depleted less than six hours after the announcement. We have made a second printing of the book that is now available (in return for a donation of $55 to Viewpoints Research which will help us to recover the costs of production and shipping). Please visit: http://vpri.org/pov for details, if you are interested. (A copy of the entire book in PDF is available for download, for free, from the same page.) Cheers, Ian Viewpoints Research is a 501(c)(3) nonprofit organization dedicated to improving "powerful ideas education" for the world's children and to advancing the state of systems research and personal computing. Visit us online at: http://www.vpri.org

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The Inbox: Sbe-apb.1.mcz
by commits＠source.squeak.org 04 Aug '10

04 Aug '10

A new version of Sbe was added to project The Inbox: http://source.squeak.org/inbox/Sbe-apb.1.mcz ==================== Summary ==================== Name: Sbe-apb.1 Author: eqw Time: 4 August 2010, 7:36:58.369 am UUID: f01bfd3c-b4b9-8c42-8ef4-11387a7afced Ancestors: A dummy package for the Squeak By Example book ==================== Snapshot ==================== SystemOrganization addCategory: #'SBE-Quinto'! SystemOrganization addCategory: #'SBE-Monticello'! ----- Method: Object>>exampleMethod (in category '*sbe-monticello') ----- exampleMethod ^4! Object subclass: #SBEBetterClass instanceVariableNames: '' classVariableNames: '' poolDictionaries: '' category: 'SBE-Monticello'! Object subclass: #SBEGoodClass instanceVariableNames: '' classVariableNames: '' poolDictionaries: '' category: 'SBE-Monticello'! ----- Method: SBEGoodClass>>trialMethod (in category 'as yet unclassified') ----- trialMethod !

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Daily Commit Log
by commits＠source.squeak.org 04 Aug '10

04 Aug '10

Changes to Trunk (http://source.squeak.org/trunk.html) in the last 24 hours: http://lists.squeakfoundation.org/pipermail/packages/2010-August/003581.html Name: Network-ar.77 Ancestors: Network-ar.76 Rewrite SocketStream>>upTo: and #upToAll: to fix a VBB (Very Bad Bug) which would cause it to go into an infinite loop if the remote closed the connection before the entity was found and also make the limit argument explicit since it can often be used more effectively (i.e., a 100k limit for reading an HTTP header is probably unnecessary). ============================================= http://lists.squeakfoundation.org/pipermail/packages/2010-August/003582.html Name: Network-ar.77 Ancestors: Network-ar.76 Rewrite SocketStream>>upTo: and #upToAll: to fix a VBB (Very Bad Bug) which would cause it to go into an infinite loop if the remote closed the connection before the entity was found and also make the limit argument explicit since it can often be used more effectively (i.e., a 100k limit for reading an HTTP header is probably unnecessary). ============================================= http://lists.squeakfoundation.org/pipermail/packages/2010-August/003583.html Name: NetworkTests-ar.16 Ancestors: NetworkTests-topa.15 Add tests for SocketStream #upTo: and #upToAll:. ============================================= http://lists.squeakfoundation.org/pipermail/packages/2010-August/003584.html Name: Morphic-ar.458 Ancestors: Morphic-cmm.457 Replace the (non-functioning) printWorldOnFile menu item with a (working) 'make screenshot' variant that makes a screenshot and saves it under SqueakScreen.X.png. ============================================= http://lists.squeakfoundation.org/pipermail/packages/2010-August/003585.html Name: Sound-ul.20 Ancestors: Sound-ar.19 - FFT >> #transformForward: now uses FFTPlugin - use #transformForward: instead of #pluginTransformData: =============================================

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TaalPulse
by Bert Freudenberg 03 Aug '10

03 Aug '10

Here's a neat music application, build on the MinimalMorphic image: http://sourceforge.net/projects/taalpulse/ - Bert - Begin forwarded message: > From: Sameer Verma <sverma(a)sfsu.edu> > Date: 3. August 2010 19:01:45 MESZ > To: olpc <india(a)lists.laptop.org>, Sugar-dev Devel <sugar-devel(a)lists.sugarlabs.org>, olpc-india(a)googlegroups.com > Subject: [Sugar-devel] TaalPulse > > Found TaalPulse, a squeak-based VM: > > "A three-in-one lehra machine for the student of hindustani (northern > indian) music. Plays lehras (cyclical melody), thekas (rythmic base) > and tampura (drone instrument) all at the same time. Runs on desktop > PCs as well as PDAs. " > > http://sourceforge.net/projects/taalpulse/

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FFT >> #transformForward: doesn't use FFTPlugin
by Levente Uzonyi 03 Aug '10

03 Aug '10

Hi, I just realized that FFT >> #transformForward: doesn't use primitiveFFTTransformData from FFTPlugin. I took an old convolution test and found that it's ~11x faster with the primitive (220ms vs 19ms). Is it intentional that this method doesn't use the primitive? Cheers, Levente

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The Trunk: Sound-ul.20.mcz
by commits＠source.squeak.org 03 Aug '10

03 Aug '10

Levente Uzonyi uploaded a new version of Sound to project The Trunk: http://source.squeak.org/trunk/Sound-ul.20.mcz ==================== Summary ==================== Name: Sound-ul.20 Author: ul Time: 3 August 2010, 4:01:13.3 pm UUID: 24415f7e-d674-f643-a087-a03906092306 Ancestors: Sound-ar.19 - FFT >> #transformForward: now uses FFTPlugin - use #transformForward: instead of #pluginTransformData: =============== Diff against Sound-ar.19 =============== Item was changed: ----- Method: FFT>>transformForward: (in category 'transforming') ----- transformForward: forward | lev lev1 ip theta realU imagU realT imagT i | + <primitive: 'primitiveFFTTransformData' module: 'FFTPlugin'> self permuteData. 1 to: nu do: [:level | lev := 1 bitShift: level. lev1 := lev // 2. 1 to: lev1 do: [:j | theta := j-1 * (n // lev). "pi * (j-1) / lev1 mapped onto 0..n/2" theta < (n//4) "Compute U, the complex multiplier for each level" ifTrue: [realU := sinTable at: sinTable size - theta. imagU := sinTable at: theta + 1] ifFalse: [realU := (sinTable at: theta - (n//4) + 1) negated. imagU := sinTable at: (n//2) - theta + 1]. forward ifFalse: [imagU := imagU negated]. " Here is the inner loop... j to: n by: lev do: [:i | hand-transformed to whileTrue... " i := j. [i <= n] whileTrue: [ip := i + lev1. realT := ((realData at: ip) * realU) - ((imagData at: ip) * imagU). imagT := ((realData at: ip) * imagU) + ((imagData at: ip) * realU). realData at: ip put: (realData at: i) - realT. imagData at: ip put: (imagData at: i) - imagT. realData at: i put: (realData at: i) + realT. imagData at: i put: (imagData at: i) + imagT. i := i + lev]]]. forward ifFalse: [self scaleData] "Reverse transform must scale to be an inverse"! Item was changed: ----- Method: FFT>>transformDataFrom:startingAt: (in category 'bulk processing') ----- transformDataFrom: anIndexableCollection startingAt: index "Forward transform a block of real data taken from from the given indexable collection starting at the given index. Answer a block of values representing the normalized magnitudes of the frequency components." | j real imag out | j := 0. index to: index + n - 1 do: [:i | realData at: (j := j + 1) put: (anIndexableCollection at: i)]. realData *= window. imagData := FloatArray new: n. + self transformForward: true. - self pluginTransformData: true. "compute the magnitudes of the complex results" "note: the results are in bottom half; the upper half is just its mirror image" real := realData copyFrom: 1 to: (n / 2). imag := imagData copyFrom: 1 to: (n / 2). out := (real * real) + (imag * imag). 1 to: out size do: [:i | out at: i put: (out at: i) sqrt]. ^ out !

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Colstme in June
by Alexander Lazarević 03 Aug '10

03 Aug '10

Hi! Just a short reminder that the next Cologne Smalltalk Meetup will be happening this Thursday at the usual time and location. For any details have a look at [1] and [2]. Cheers, Alex [1] http://colstme.selfish.org/events/stammtisch03 [2] http://colstme.selfish.org/blog/2010-06-02

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Re: [squeak-dev] The Trunk: Network-ar.77.mcz
by Tobias Pape 03 Aug '10

03 Aug '10

Am 2010-08-03 um 02:03 schrieb commits(a)source.squeak.org: > Andreas Raab uploaded a new version of Network to project The Trunk: > http://source.squeak.org/trunk/Network-ar.77.mcz > > ==================== Summary ==================== > > Name: Network-ar.77 > Author: ar > Time: 2 August 2010, 7:01:43.782 pm > UUID: 188c5481-3b63-9b44-b341-1c4683784f9b > Ancestors: Network-ar.76 > > Rewrite SocketStream>>upTo: and #upToAll: to fix a VBB (Very Bad Bug) which would cause it to go into an infinite loop if the remote closed the connection before the entity was found and also make the limit argument explicit since it can often be used more effectively (i.e., a 100k limit for reading an HTTP header is probably unnecessary). Yay! Finally :) Thank you. So Long, -Tobias

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Problem taking screen shot (Squeak 4.1 Ubuntu 10.04)
by Ralph Boland 03 Aug '10

03 Aug '10

I attempted to take a screen shot of my Squeak 4.1 image (I am running Ubuntu 10.04) using "print PS to file ..." but it crashed with error: shotDSCPostscriptCanvas(Object)>>doesNotUnderstand: #frameAndFillRoundRect:radius:fillStyle:borderWidth:borderColor: in PluggableButtonMorphPlus>>drawOn: where shotDCSPostscriptCanvas is a DSCPostscriptCanvas. Is this a known problem?/ should I generate a bug report? Is there another way to generate a screenshot such as a gif file? Regards, Ralph Boland P.S. I ran into a similar problem with Squeak 10.2.

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The Trunk: Morphic-ar.458.mcz
by commits＠source.squeak.org 03 Aug '10

03 Aug '10

Andreas Raab uploaded a new version of Morphic to project The Trunk: http://source.squeak.org/trunk/Morphic-ar.458.mcz ==================== Summary ==================== Name: Morphic-ar.458 Author: ar Time: 2 August 2010, 8:55:00.693 pm UUID: 2274572c-a237-5d46-ad6b-34bf05403aeb Ancestors: Morphic-cmm.457 Replace the (non-functioning) printWorldOnFile menu item with a (working) 'make screenshot' variant that makes a screenshot and saves it under SqueakScreen.X.png. =============== Diff against Morphic-cmm.457 =============== Item was changed: ----- Method: TheWorldMenu>>addPrintAndDebug: (in category 'construction') ----- addPrintAndDebug: menu Preferences simpleMenus ifFalse: [ self fillIn: menu from: { + { 'make screenshot'. {self. #saveScreenshot}. 'makes a screenshot and saves it to disk'}. + "{ 'print PS to file...'. { self. #printWorldOnFile }. 'write the world into a postscript file' }." - { 'print PS to file...'. { self. #printWorldOnFile }. 'write the world into a postscript file' }. { 'debug...'. { self. #debugDo }. 'a menu of debugging items' } } ]! Item was added: + ----- Method: TheWorldMenu>>saveScreenshot (in category 'action') ----- + saveScreenshot + "Make a screenshot of the world and save it to a file" + + SampledSound playSoundNamed: 'camera'. + PNGReadWriter putForm: myWorld imageForm onFileNamed: + (FileDirectory default nextNameFor: 'SqueakScreen' extension:'png'). + !

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