- Pharo-users - lists.pharo.org

Re: [Pharo-users] Anyone having a Rserve client?

by Thierry Goubier

Hi Phil, I'm interested too. I could commit resources to help if needed. Thierry 2014-11-10 10:28 GMT+01:00 phil(a)highoctane.be <phil(a)highoctane.be>: > I am doing some R work and wanted to integrate with Pharo. > > Is there any support for Rserve around? > > http://www.rforge.net/Rserve/dev.html > > At this point I am doing OProcess style stuff with littler but Rserve > would be cooler. > > There are binding for Ruby and Python. > > e.g. > http://pythonhosted.org//pyRserve/ > https://github.com/ralhei/pyRserve > > Stats are becoming bigger and bigger and the leader of the pack is R. > > DHB is fine and I do use some of it but let's face it, it is nowhere near > the power of R... > > > Phil >

Nov. 10, 2014

Anyone having a Rserve client?

by phil＠highoctane.be

I am doing some R work and wanted to integrate with Pharo. Is there any support for Rserve around? http://www.rforge.net/Rserve/dev.html At this point I am doing OProcess style stuff with littler but Rserve would be cooler. There are binding for Ruby and Python. e.g. http://pythonhosted.org//pyRserve/ https://github.com/ralhei/pyRserve Stats are becoming bigger and bigger and the leader of the pack is R. DHB is fine and I do use some of it but let's face it, it is nowhere near the power of R... Phil

Nov. 10, 2014

Re: [Pharo-users] question on syntax "negate numbers"

by Thierry Goubier

2014-11-10 8:47 GMT+01:00 Henrik Johansen <henrik.s.johansen(a)veloxit.no>: > 3 @ -5 is not a problem, and accepted by both. > 3 @ - <space> 5 is what I object to (and Opal allows) > RBParser allows this one even if old Compiler dissallows it (i.e. in Pharo 2). I haven't tracked if Opal follows the RBParser on that or if this is the reverse (Opal pushed changes on RBParser). I suspect all things RB in Pharo (and Squeak?) are a port from the Dolphin version of RB, which means this is allowed in quite a few other smalltalks (Dolphin?, VW?). I haven't checked if the SmaCC Smalltalk parser accept that. Note: 4 - 5 in RBParser does what you would expect. 4 - - 5 as well. > 3 @-5 and/or 3 @- 5 is (rightly) disallowed by both. > That one is easier and expected. My position would be twofold: - RBParser is, IMHO, a good parser and I would follow its interpretation. That Opal reuses it is a good point for me. - As a programming language designer (and parser implementor), accepting - 5 is user friendly, but a bit too contextual in the lexer to be nice to implement. Thierry > > Cheers, > Henry >

Nov. 10, 2014

Re: [Pharo-users] question on syntax "negate numbers"

by Henrik Johansen

> On 10 Nov 2014, at 8:45 , Thierry Goubier <thierry.goubier(a)gmail.com> wrote: > > > > 2014-11-10 7:59 GMT+01:00 Henrik Johansen <henrik.s.johansen(a)veloxit.no <mailto:henrik.s.johansen@veloxit.no>>: > > IMHO, the old compiler is right, whitespace should not be allowed in literals. > > Whitespace can be \t or \n,\r which makes for strange literals (multilines) such as: > > - > > 5 > > And would create ambiguity in some cases > > is 4 - 5 two literals, or is it two literals separated by the - operator ? > > For instance, 3 @ - 5 reads like gibberish. > > But is 3 @ -5 a problem or not ? Why is the old compiler accepting -3 @ 5, and not 3 @ -5 ? 3 @ -5 is not a problem, and accepted by both. 3 @ - <space> 5 is what I object to (and Opal allows) 3 @-5 and/or 3 @- 5 is (rightly) disallowed by both. Cheers, Henry

Nov. 10, 2014

Re: [Pharo-users] question on syntax "negate numbers"

by Thierry Goubier

2014-11-10 7:59 GMT+01:00 Henrik Johansen <henrik.s.johansen(a)veloxit.no>: > > IMHO, the old compiler is right, whitespace should not be allowed in > literals. > Whitespace can be \t or \n,\r which makes for strange literals (multilines) such as: - 5 And would create ambiguity in some cases is 4 - 5 two literals, or is it two literals separated by the - operator ? For instance, 3 @ - 5 reads like gibberish. > But is 3 @ -5 a problem or not ? Why is the old compiler accepting -3 @ 5, and not 3 @ -5 ? Thierry > > Cheers, > Henry >

Nov. 10, 2014

Re: [Pharo-users] question on syntax "negate numbers"

by Henrik Johansen

> On 08 Nov 2014, at 5:55 , Werner Kassens <wkassens(a)libello.com> wrote: > > but if you omit the space between - and 3 the old compiler understands it too, hence its just a convenience thing that cant lead to misunderstandings, or? > btw opal also understands this: > - 3@2. --> (-3@2) > i mean, its obvious nevertheless that "-" is not a method like negated, but part of a number and opal is just a bit more flexible with number formatting. > werner > > On 11/08/2014 04:40 PM, Nicolai Hess wrote: >> Old compiler refuses to accept this code: >> >> - 4 @ -5 >> ^-- nothing more expected >> >> Opal compiler does just fine: >> >> - 4 @ -5 -> (-4@ -5) >> >> who is right? > IMHO, the old compiler is right, whitespace should not be allowed in literals. For instance, 3 @ - 5 reads like gibberish. Cheers, Henry

Nov. 10, 2014

[Survey] Reasoning about objects

by Andrei Chis

Hi all, In order to improve object inspectors we are doing a survey. We want to know whether several features are important to you or not when trying to understand objects. This is a very short survey and should't take you more than 10 minutes to complete. Please take this time to participate. Here is the link to the survey: http://goo.gl/forms/xKPxqLxJJv Cheers, Andrei

Nov. 10, 2014

Re: [Pharo-users] Polygons in woden

by Ronie Salgado

Hi Nicola, Sorry for not answering before. I have to improve my mail filters. As for the shadows, currently only the spotlights can cast shadows. I have yet to implement shadow mapping for directional lights. As for point light, I won't be implementing them in the near future, because they are very expensive. Currently you can simulate a point light casting shadows by using 6 spotlights with different orientations but in the same point. Also, you have to use deferred shading if you need shadows (WDFPSSimpleExample8 >> #initializeSceneRenderer) As for the polygons, Woden cannot render arbitrary polygons. Only points, lines, triangles and quads because that is what the graphics cards support. For an arbitrary polygon, you have to perform some kind of triangulation. If the polygon is convex, this is trivial, but if the polygon is concave this is hard (the algorithm missing is a Restricted Delaunay Triangulation). For drawing a convex polygon, you have to do something like this: positions := "Some Collection" .. builder newTrianglesScope. "Add the positions". positions do: [:i | builder addP: .... ]. "Add the indices" 3 to: positions size do: [:i | builder addI1: 1 i2: i - 1 i3: i ]. What this code does is to generate a triangle fan ( http://en.wikipedia.org/wiki/Triangle_fan ) which is a simple way to triangulate a convex polygon. I think that I should add a method to the geometry builder. Greetings, Ronie 2014-10-28 11:33 GMT-03:00 Nicolas Lusa <nicolas.lusa(a)usi.ch>: > Hi everyone, > > I am working on some 3d representation and I am trying to draw 3D polygons > with woden. I actually manage to make "the walls" but I still have to > implement top and bottom parts which are not so simple since the shape can > be really different from case to case. > How I am actually doing it is with: WDGeometryBuilder adding vertices with > addP: N: C: TC: messages and with addQuadI1: i2: i3: i4: > Furthermore I have some issues with the shadows which actually don't > appear. > > You can see a current polygon created with the code that I made in the > attached image. (also notice the shadows are missing as well as the bottom > and top part of the polygon). > [cid:E6905B6F-F5CA-447D-A42D-BA1604AC7F5A@mobile.usilu.net] > Now my question is: is there already something that makes those polygons > or does anyone have any hint on how to make the top part with woden? > > Thannks in advance. > > Cheers, > Nicolas >

Nov. 9, 2014

Re: [Pharo-users] question on syntax "negate numbers"

by Werner Kassens

but if you omit the space between - and 3 the old compiler understands it too, hence its just a convenience thing that cant lead to misunderstandings, or? btw opal also understands this: - 3@2. --> (-3@2) i mean, its obvious nevertheless that "-" is not a method like negated, but part of a number and opal is just a bit more flexible with number formatting. werner On 11/08/2014 04:40 PM, Nicolai Hess wrote: > Old compiler refuses to accept this code: > > - 4 @ -5 > ^-- nothing more expected > > Opal compiler does just fine: > > - 4 @ -5 -> (-4@ -5) > > who is right?

Nov. 8, 2014

Re: [Pharo-users] [ANN]: NewExternalWebBrowser

by Sean P. DeNigris

jannik laval wrote > It seems that there is no NBUnixShell. > I have implemented the necessary for Ubuntu, in Phratch. > > Would you like I push it ? Absolutely! Is there a command or library that can open a URL that works on all GNU+Linux flavors (bonus if it's pre-loaded)? When I looked into this the first time, I remember there was xdg-open, gnome-open, etc, etc... ----- Cheers, Sean -- View this message in context: http://forum.world.st/ANN-NewExternalWebBrowser-tp4788403p4789174.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Nov. 8, 2014