November 2014 - Pharo-users

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

question on syntax "negate numbers"

by Nicolai Hess

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] next sttep after the example tutorial

by Johan Fabry

Roelof, I just want to say that I highly recommend that you read Kilonâs PBE chapters in the link that he includes in his mail. It will help you to get the basic knowledge that you need to be able to improve your Pharo knowledge. From your mails it seems to me that you still need to work on that, to get the fundamentals right (sorry if I am mistaken in that, Iâm only human). On Nov 8, 2014, at 9:06 AM, kilon alios <kilon.alios(a)gmail.com> wrote: > ok that top tool up there is finder , if you open it the first option for searching will be "selectors" , selectors are methods, if you did not know this I advise to read PBE since you need to have this basic understanding to use Pharo. > > I have also began to port PBE to Pharo 3 because existing PBE is still for Pharo 1.4 , you can read it here --> http://kilon.gitbooks.io/pbe/ > > On Sat, Nov 8, 2014 at 9:38 AM, Roelof Wobben <r.wobben(a)home.nl> wrote: > Hello, > > Sorry I mean a method. > > Pharo version : 3.0 > OS : Windows 7 Home > Image release : 30860 > > screenshot : http://snag.gy/ISMs7.jpg > > Roelof ---> Save our in-boxes! http://emailcharter.org <--- Johan Fabry - http://pleiad.cl/~jfabry PLEIAD lab - Computer Science Department (DCC) - University of Chile

Nov. 8, 2014

Re: [Pharo-users] About PBE status was Re: How not to serve an AngularJs application from Pharo

by kilon alios

yeah i have left some things behind like linking through chapters some meta-tags to figures , small info here and there to speed up my documentation effort. I felt that it was better to focus on the content itself and porting as many chapters as possible than the technical details with the assumption that people eventually would come in to fill my gaps. Personally I felt at some point that it would be better if PBE was inside Pharo , it would make it much easier for example instead of displaying images to have a link that would open the pharo tool and see directly the tool itself instead of a screenshot. Also examples could open in workspace so the user could directly play on them. Still searching a way to do this :) On Sat, Nov 8, 2014 at 10:09 AM, stepharo <stepharo(a)free.fr> wrote: > Hi kilon > > Thanks for continuing to push it. I really want to see PharoByExample in > Pharo30/40. > I will read and compare with the orginal the UpdatePharoByExample and do a > pass on the chapters you did. > I saw that some references are not found. I will have a look. I should > change the latex template to print in a better way >> > because right now this is a bit ugly but a detail. We should probably use > the latest version of pillar. I will check if damien > can help us on this one. > > Stef > > > >

Nov. 8, 2014

Re: [Pharo-users] next sttep after the example tutorial

by stepharo

On 7/11/14 18:12, Peter UhnÃ¡k wrote: > Well for start there is this http://pharo.org/documentation (books > Pharo By Example + Deep into Pharo + Pharo for the Enterprise) and > this http://pharo.gemtalksystems.com/ > > As far as expertise goes you can probably become an expert by writing > a book about Pharo. :) :) This is so true. When you force yourselves to be sure that other people can understand something you have to deeply understand it. stef

Nov. 8, 2014

Re: [Pharo-users] About PBE status was Re: How not to serve an AngularJs application from Pharo

by stepharo

Hi kilon Thanks for continuing to push it. I really want to see PharoByExample in Pharo30/40. I will read and compare with the orginal the UpdatePharoByExample and do a pass on the chapters you did. I saw that some references are not found. I will have a look. I should change the latex template to print in a better way >> because right now this is a bit ugly but a detail. We should probably use the latest version of pillar. I will check if damien can help us on this one. Stef

Nov. 8, 2014

Re: [Pharo-users] next sttep after the example tutorial

by kilon alios

ok that top tool up there is finder , if you open it the first option for searching will be "selectors" , selectors are methods, if you did not know this I advise to read PBE since you need to have this basic understanding to use Pharo. I have also began to port PBE to Pharo 3 because existing PBE is still for Pharo 1.4 , you can read it here --> http://kilon.gitbooks.io/pbe/ On Sat, Nov 8, 2014 at 9:38 AM, Roelof Wobben <r.wobben(a)home.nl> wrote: > Hello, > > Sorry I mean a method. > > Pharo version : 3.0 > OS : Windows 7 Home > Image release : 30860 > > screenshot : http://snag.gy/ISMs7.jpg > > Roelof > > kilon alios schreef op 7-11-2014 22:08: > > also whats a module ? > > On Fri, Nov 7, 2014 at 10:45 PM, Roelof Wobben <r.wobben(a)home.nl> wrote: > >> Thanks, >> >> I can see a choice finder but as far as I can see I cannot use it for >> modules. >> >> Roelof >> >> >> >> >> kilon alios schreef op 7-11-2014 21:21: >> >> start here >> >> http://pharo.org/documentation >> >> here a video tutorial series i created >> >> https://www.youtube.com/playlist?list=PLqbtQ7OkSta0ULYAd7Qdxof851ybh-_m_ >> >> you can skip first video "Why Pharo" the rest is practical tutorials. >> >> if you got Pharo 3 or 4 , finder should be in the tools section of >> world menu. >> >> On Fri, Nov 7, 2014 at 8:13 PM, Roelof Wobben <r.wobben(a)home.nl> wrote: >> >>> oke, are there books / tutorials I can do so I can understand better >>> how smalltalk works. >>> >>> I was thinking of making a calculator as my first project. >>> >>> Roelof >>> >>> >>> >>> kilon alios schreef op 7-11-2014 18:34: >>> >>> yes, read all the pharo documentation, read the entire pharo code, >>> understand the entire pharo code, make a few hundrend pharo application and >>> boom your are an expert :) >>> >>> Seriously though, do whatever is interesting to you and ask questions >>> here and in stackoverflow. You dont need to be expert , just someone that >>> finds pharo enjoyable and useful. >>> >>> On Fri, Nov 7, 2014 at 7:17 PM, Roelof Wobben <r.wobben(a)home.nl> wrote: >>> >>>> Thanks. >>>> >>>> By expert I mean I can write and test most of the programms and know >>>> very well how pharo works. >>>> >>>> Roelof >>>> >>>> >>>> Peter UhnÃ¡k schreef op 7-11-2014 18:12: >>>> >>>> Well for start there is this http://pharo.org/documentation (books >>>> Pharo By Example + Deep into Pharo + Pharo for the Enterprise) and this >>>> http://pharo.gemtalksystems.com/ >>>> >>>> As far as expertise goes you can probably become an expert by writing >>>> a book about Pharo. :) >>>> >>>> Peter >>>> >>>> >>>> On Fri, Nov 7, 2014 at 6:01 PM, Roelof Wobben <r.wobben(a)home.nl> wrote: >>>> >>>>> Hello, >>>>> >>>>> Is there a book / tutorial/ challenges that I can use to become a >>>>> expert in Pharo ? >>>>> >>>>> Roelof >>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >

Nov. 8, 2014

Re: [Pharo-users] next sttep after the example tutorial

by Roelof Wobben

Nov. 8, 2014