April 2016 - Pharo-users - lists.pharo.org

Re: [Pharo-users] New project: AR.Drone communication API in Pharo

by Stephan Eggermont

On 09-04-16 15:24, Carolina HernÃ¡ndez wrote: > I couldn't find any direct way to use a joystick in Pharo, if someone knows > about one, I'd like to integrate it to my code. https://github.com/Geal/Squeak-VM/tree/master/platforms/Mac%20OS/plugins/Jo… Refers to a joystick plugin for squeak. I don't know if that is in the current distribution (it doesn't seem to be), so you might ask on the vm-dev list about it. I haven't looked at it, so it could be for a RS-232 based joystick instead of something more useful with a modern pc. Can't SDL2 be used with a joystick? Stephan

April 9, 2016

Re: [Pharo-users] How to determine if a file is hidden

by Robert J Rothwell

Thanks Damien, I'm sorry...yes visibility is exactly what I meant, and on a Mac as well. You are right that some invisible things start with a period (on a Mac as well, so that's easy), and others have the invisibility flag set. Should I be able to use OSWindows to use getfileinfo from within pharo? I haven't been able to figure it out yet, and am kind of "starting from scratch" with Pharo (again) because I haven't tried it out for a long time (for various reasons). However, I have recently been inspired by how I have to work with Windows at work (I use Parallels). I decided to look at Pharo with fresh eyes as just another OS that could do different things in the same way that I do some things only in Windows (my company provides a Windows-based object database platform for data quality written in VisualWorks). This paradigm shift has suddenly freed me from "I want to write Cocoa apps in Pharo" mode. I manage all my projects in a simple file-based manner so I can easily switch back and forth (between Mac and Windows) as needed, and take advantage of the Parallels features to "Open in Windows," or "Open on Mac," as well as Desktop sharing. I thought it would be an interesting exercise to try to create a way to work with files and folders in a similar fashion in Pharo (shared desktop, better file browsing, etc...), and my first sticking point was "what if I don't want to see all these [invisible] files." I'm hoping I might be able to learn Spec that way, as well as communicating with the image to provide a similar "Open in Pharo" service (for pharo application files I might invent), and of course I need to know how to interact with the Mac OS as well, so this seemed like a nice, small place to start. Thanks again for your help, Rob > On Apr 9, 2016, at 4:51 PM, Damien Pollet <damien.pollet+pharo(a)gmail.com> wrote: > > Hidden in what sense? > > On Linux, files whose name start with a period are "hidden" (by convention, many commands ignore them) > > On OS X, files and directories that are hidden to the Finder have a special attribute in the file system. I don't think there's an accessor for that in Pharo yet, but as a workaround you can use the system command GetFileInfo to check the state of the invisibility flag (v): > > GetFileInfo -a v /Applications > # should echo 0 (invisibility flag not set) > > GetFileInfo -a v /bin > # should echo 1 > > > On 9 April 2016 at 21:12, Robert J Rothwell <r.j.rothwell(a)gmail.com <mailto:r.j.rothwell@gmail.com>> wrote: > Hello, > > Is there a way to determine if a file is hidden? I couldn't find that in "Deep into Pharo". > > For example, I can get my desktop files with: > > desktopFiles := FileLocator desktop children. > > And now I would like to filter that collection to the non-hiddent files with something like: > > desktopFiles select: [:each | each isHidden not ] > > But there doesn't seem to be anything like "isHidden" for a FileLocator object. > > Thank you, > > Rob Rothwell > >

April 9, 2016

Re: [Pharo-users] How to determine if a file is hidden

by Damien Pollet

Hidden in what sense? On Linux, files whose name start with a period are "hidden" (by convention, many commands ignore them) On OS X, files and directories that are hidden to the Finder have a special attribute in the file system. I don't think there's an accessor for that in Pharo yet, but as a workaround you can use the system command GetFileInfo to check the state of the invisibility flag (v): GetFileInfo -a v /Applications # should echo 0 (invisibility flag not set) GetFileInfo -a v /bin # should echo 1 On 9 April 2016 at 21:12, Robert J Rothwell <r.j.rothwell(a)gmail.com> wrote: > Hello, > > Is there a way to determine if a file is hidden? I couldn't find that in > "Deep into Pharo". > > For example, I can get my desktop files with: > > desktopFiles := FileLocator desktop children. > > And now I would like to filter that collection to the non-hiddent files > with something like: > > desktopFiles select: [:each | each isHidden not ] > > But there doesn't seem to be anything like "isHidden" for a FileLocator > object. > > Thank you, > > Rob Rothwell > >

April 9, 2016

How to determine if a file is hidden

by Robert J Rothwell

Hello, Is there a way to determine if a file is hidden? I couldn't find that in "Deep into Pharo". For example, I can get my desktop files with: desktopFiles := FileLocator desktop children. And now I would like to filter that collection to the non-hiddent files with something like: desktopFiles select: [:each | each isHidden not ] But there doesn't seem to be anything like "isHidden" for a FileLocator object. Thank you, Rob Rothwell

April 9, 2016

Re: [Pharo-users] New project: AR.Drone communication API in Pharo

by stepharo

Hi Good work. Can you tell us more what is the principle to communicate with the Parrot. Stef Le 9/4/16 15:24, Carolina HernÃ¡ndez a Ã©crit : > Hi, my name is Carolina Hernandez and I'm a Computer Engineering > student at the University of Chile. > As part of my final degree project, I'm creating a communication API > for controlling the Parrot AR.Drone 2.0 from Pharo. I've just released > an early version. The code is hosted in Smalltalkhub: > http://smalltalkhub.com/#!/~CaroHernandez/ArDronePharo > <http://smalltalkhub.com/#%21/%7ECaroHernandez/ArDronePharo> > > I also made a video of a test flight, where the AR.Drone is controlled > using the API and keyboard: > https://www.youtube.com/watch?v=d8rERiBoD0o > > I couldn't find any direct way to use a joystick in Pharo, if someone > knows about one, I'd like to integrate it to my code. > > Development and tests have been done in Pharo 4.0 and ubuntu 12.04 > Comments are welcome! > > Caro

April 9, 2016

Re: [Pharo-users] New project: AR.Drone communication API in Pharo

by S Krish

Very interesting and well done. *Observations: from a 15 min review. beyond the basics .. which really is well done. Hope I can play with it sometime when I get time.. * Love the commandQueue and UDP handling and this block: senderProcess := [[ | nextCommand | "dequeue the next command, enumerate it and send it" nextCommand := commandsQueue next . arDrone commandAdapter send: nextCommand ] repeat ] fork. I like the comments in #*sendMoveCommandLeftRightTilt*: lrTilt *frontBackTilt*: fbTilt *verticalSpeed*: verticalSpeed *angularSpeed*: angularSpeed But the #initialize method is doing too much in one long method.. check other methods too.. *Comments: * takeOff "Every 1 second sends the take off command to the drone, until it's state goes from Landed to Flying (ARDState flyMask from 0 to 1)" Either the naming can be keepFlying .. not sure if I want to takeOff every second. Advice avoiding overrides on Integer and Float given its not really needed and you can do that in your own class in the package. viz: #*from32BitArrayWithOnesAt*: On Sat, Apr 9, 2016 at 8:24 AM, Carolina HernÃ¡ndez <carola.hp(a)gmail.com> wrote: > Hi, my name is Carolina Hernandez and I'm a Computer Engineering student > at the University of Chile. > As part of my final degree project, I'm creating a communication API for > controlling the Parrot AR.Drone 2.0 from Pharo. I've just released an early > version. The code is hosted in Smalltalkhub: > http://smalltalkhub.com/#!/~CaroHernandez/ArDronePharo > > I also made a video of a test flight, where the AR.Drone is controlled > using the API and keyboard: > https://www.youtube.com/watch?v=d8rERiBoD0o > > I couldn't find any direct way to use a joystick in Pharo, if someone > knows about one, I'd like to integrate it to my code. > > Development and tests have been done in Pharo 4.0 and ubuntu 12.04 > Comments are welcome! > > Caro >

April 9, 2016

Re: [Pharo-users] New project: AR.Drone communication API in Pharo

by Ben Coman

On Sat, Apr 9, 2016 at 9:24 PM, Carolina HernÃ¡ndez <carola.hp(a)gmail.com> wrote: > Hi, my name is Carolina Hernandez and I'm a Computer Engineering student at > the University of Chile. > As part of my final degree project, I'm creating a communication API for > controlling the Parrot AR.Drone 2.0 from Pharo. I've just released an early > version. The code is hosted in Smalltalkhub: > http://smalltalkhub.com/#!/~CaroHernandez/ArDronePharo > > I also made a video of a test flight, where the AR.Drone is controlled using > the API and keyboard: > https://www.youtube.com/watch?v=d8rERiBoD0o > > I couldn't find any direct way to use a joystick in Pharo, if someone knows > about one, I'd like to integrate it to my code. > > Development and tests have been done in Pharo 4.0 and ubuntu 12.04 > Comments are welcome! > > Caro Very cool. Wish I had a Parrot to try it on. cheers -ben

April 9, 2016

Re: [Pharo-users] New project: AR.Drone communication API in Pharo

by Tudor Girba

Beautiful work! Doru > On Apr 9, 2016, at 6:24 AM, Carolina HernÃ¡ndez <carola.hp(a)gmail.com> wrote: > > Hi, my name is Carolina Hernandez and I'm a Computer Engineering student at the University of Chile. > As part of my final degree project, I'm creating a communication API for controlling the Parrot AR.Drone 2.0 from Pharo. I've just released an early version. The code is hosted in Smalltalkhub: > http://smalltalkhub.com/#!/~CaroHernandez/ArDronePharo > > I also made a video of a test flight, where the AR.Drone is controlled using the API and keyboard: > https://www.youtube.com/watch?v=d8rERiBoD0o > > I couldn't find any direct way to use a joystick in Pharo, if someone knows about one, I'd like to integrate it to my code. > > Development and tests have been done in Pharo 4.0 and ubuntu 12.04 > Comments are welcome! > > Caro -- www.tudorgirba.com www.feenk.com "Every successful trip needs a suitable vehicle."

April 9, 2016

Re: [Pharo-users] New project: AR.Drone communication API in Pharo

by HernÃ¡n Morales Durand

Hi Carolina, Thank you for sharing. Do you plan to support gazebo or tum_simulator in your API? HernÃ¡n http://gazebosim.org/ http://wiki.ros.org/tum_simulator 2016-04-09 10:24 GMT-03:00 Carolina HernÃ¡ndez <carola.hp(a)gmail.com>: > Hi, my name is Carolina Hernandez and I'm a Computer Engineering student > at the University of Chile. > As part of my final degree project, I'm creating a communication API for > controlling the Parrot AR.Drone 2.0 from Pharo. I've just released an early > version. The code is hosted in Smalltalkhub: > http://smalltalkhub.com/#!/~CaroHernandez/ArDronePharo > > I also made a video of a test flight, where the AR.Drone is controlled > using the API and keyboard: > https://www.youtube.com/watch?v=d8rERiBoD0o > > I couldn't find any direct way to use a joystick in Pharo, if someone > knows about one, I'd like to integrate it to my code. > > Development and tests have been done in Pharo 4.0 and ubuntu 12.04 > Comments are welcome! > > Caro >

April 9, 2016

Re: [Pharo-users] New project: AR.Drone communication API in Pharo

by Stephan Eggermont

On 09-04-16 15:24, Carolina HernÃ¡ndez wrote: > I also made a video of a test flight, where the AR.Drone is controlled > using the API and keyboard: > https://www.youtube.com/watch?v=d8rERiBoD0o Nice! Well done. Stephan

April 9, 2016