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  • OPN Specialized Webcasts - Everything You Need to Know - April 2010

    - by Claudia Costa
    Oracle presents a new series of webcasts hosted by renowned experts that will help you make the most of the exciting New OPN Specialized program. The webcasts will provide you with everything you need to know about "What is the OPN Specialized program?" and "How to become Specialized in the Technology and Application Products", plus there will be a live Question and Answer session. Attend the webcasts and discover how to differentiate your business from the competition with the OPN Specialized Program. Please select the topic and date of your interest and obtain the conference details: ·         What is the OPN Specialized program? March 16th and April 6th 2010: Click here for call details. ·         How to become Specialized in the Technology products portfolio?March 23rd and April 13thClick here for call details. ·         How to become Specialized in the Applications products portfolio? March 30th and April 20thClick here for call details. PARTICIPATE, and take advantage of the special promotional pricing available for a limited time only.  -------------------------------------------------------   Para mais informações por favor contacte: Melissa Lopes 214235194

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  • what does AngleVectors method in quake 3 source code does

    - by kypronite
    I just downloaded quake 3 for learning purposes. I know some of some linear algebra(basic vector math ie: dot,cross product). However I can't decipher what below method does, I know what is yaw,pitch and roll. But I can't connect these with vector. Worse, I'm not sure this fall under what math 'category', so I don't really know how to google. Hence the question here. Anyone? void AngleVectors( const vec3_t angles, vec3_t forward, vec3_t right, vec3_t up) { float angle; static float sr, sp, sy, cr, cp, cy; // static to help MS compiler fp bugs angle = angles[YAW] * (M_PI*2 / 360); sy = sin(angle); cy = cos(angle); angle = angles[PITCH] * (M_PI*2 / 360); sp = sin(angle); cp = cos(angle); angle = angles[ROLL] * (M_PI*2 / 360); sr = sin(angle); cr = cos(angle); if (forward) { forward[0] = cp*cy; forward[1] = cp*sy; forward[2] = -sp; } if (right) { right[0] = (-1*sr*sp*cy+-1*cr*-sy); right[1] = (-1*sr*sp*sy+-1*cr*cy); right[2] = -1*sr*cp; } if (up) { up[0] = (cr*sp*cy+-sr*-sy); up[1] = (cr*sp*sy+-sr*cy); up[2] = cr*cp; } } ddddd

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  • Promoting Organizational Visibility for SOA and SOA Governance Initiatives – Part I by Manuel Rosa and André Sampaio

    - by JuergenKress
    The costs of technology assets can become significant and the need to centralize, monitor and control the contribution of each technology asset becomes a paramount responsibility for many organizations. Through the implementation of various mechanisms, it is possible to obtain a holistic vision and develop synergies between different assets, empowering their re-utilization and analyzing the impact on the organization caused by IT changes. When the SOA domain is considered, the issue of governance should therefore always come into play. Although SOA governance is mandatory to achieve any measure of SOA success, its value still passes incognito in most organizations, mostly due to the lack of visibility and the detached view of the SOA initiatives. There are a number of problems that jeopardize the visibility of these initiatives: Understanding and measuring the value of SOA governance and its contribution – SOA governance tools are too technical and isolated from other systems. They are inadequate for anyone outside of the domain (Business Analyst, Project Managers, or even some Enterprise Architects), and are especially harsh at the CxO level. Lack of information exchange with the business, other operational areas and project management – It is not only a matter of lack of dialog but also the question of using a common vocabulary (textual or graphic) that is adequate for all the stakeholders. We need to generate information that can be useful for a wider scope of stakeholders like Business and enterprise architectures. In this article we describe how an organization can leverage from the existing best practices, and with the help of adequate exploration and communication tools, achieve and maintain the level of quality and visibility that is required for SOA and SOA governance initiatives. Introduction Understanding and implementing effective SOA governance has become a corporate imperative in order to ensure coherence and the attainment of the basic objectives of SOA initiatives: develop the correct services control costs and risks bound to the development process reduce time-to-market Read the full article here. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Facebook Wiki Mix Forum Technorati Tags: SOA Governance,Link Consulting,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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  • Why do things change between using a LiveCD/LiveUSB and installing Ubuntu?

    - by ahow628
    Here have been a couple of weird experiences I've had with a Ubuntu LiveCD or LiveUSB: 1) I had one of the original Chromebooks (CR-48). I ended up wiping ChromeOS and installing only Ubuntu 12.04.0 just after it came out. It worked like a charm. About a year later, I broke something and reinstalled Ubuntu using 12.04.3 on a LiveUSB. The LiveUSB worked perfectly - screen resolution, wifi, trackpad all worked fine. I installed it (once installing updates, once stock from the USB drive) and both times screen resolution, wifi, and trackpad all broke. I ended up downloading 12.04.0 and installing it then upgrading to 12.04.3 after the fact and everything worked perfectly once again. 2) I purchased a Toshiba Portege z935 and the LiveUSB worked perfectly, namely the wifi. After install, wifi was extremely slow and basically couldn't load any pages. The answer was that Bluetooth conflicted somehow with wifi and Bluetooth had to be disabled to get wifi to work. Yet both could be enabled in the LiveUSB version, no problem. So my question is, why does this happen? Why does everything work perfectly from the LiveUSB version but then get broken when installed on the system? Is there a different way to install Ubuntu that would allow things to be installed over exactly as they were on the LiveUSB version (drivers, settings, etc)? Are there assumptions that the install makes that I could override somehow?

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  • Should MVVM ViewModel inject an HTML template for default view?

    - by explunit
    I'm working on web application design that includes Knockout.js and have an overall MVVM question: Does it make sense for the ViewModel to automatically inject a default HTML template (pulled from separate file)? More detail: suppose I have a site like this... header... widget 1 widget 2 widget 3 footer ...and widgets 1/2/3 are going to be Knockout.js ViewModels determined at runtime from an overall list of available widgets, each with associated HTML template file. I understand that in MVVM you want the view (HTML template in this case) to be separate from the ViewModel (Javascript file in this case) so that people can edit it separately and possibly provide multiple templates for different "skins". However, it seems like it would also make sense for the ViewModel to point to a default html template that gets automatically used unless the controlling code provides a different one. Am I looking at this correctly? As an example, see this answer on StackOverflow where he recommends injecting the HTML and then the ViewModel. Seems like a one-liner would make more sense in that case, with the possibility of overriding a default template value.

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  • Learning advanced java skills

    - by moe
    I've been programming in java for a while and I really like the language, I've mostly just done game programming, but I want to get a feel for some of the more commonly used api's and frameworks and just get a generally more well-rounded grasp of the language and the common libraries in the current job market. From what I found things like spring, hibernate, and GWT are pretty in demand right now. I looked at some tutorials online and they weren't hard to follow but I really felt like I had no context for what I was learning - I had no idea how any of it would be use in a real work environment. I know nothing can rival the benefit I'd get from actual work experience but that's not an option for me right now, I need another way to learn these technologies in a way where I'll at least feel comfortable working with them and know what I'm doing beyond just understanding what code does what. I checked out a few books but they were all really old(like pre-2006, am I right to assume those books would be kind of out of date today?) or required experience with libraries that I didn't have and can't get. I hate getting stuck looking for the best resource to learn something instead of spending my time actually learning. All I really want is someone to point me to a resource(website or ebook) that is aimed at already experienced java developers and will not only teach me some interesting useful java technology(anything that is useful, I dont know much outside of graphics libraries and game related things so I was thinking some database or web programming api's) but also give me a good perspective of it and leave me feeling confident that I could actually use what I learned on a practical application. If my post makes you think I'm not yet experienced to be learning these things, which I doubted earlier today but am now starting to question, then what do you think is the next step for me? I just want to get better at java. Thanks everyone

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  • Loading Obj Files in Soya3d engine

    - by John Riselvato
    I recently just found soya3d and from what i have seen through the tutorials i will be able to make exactly what i wanted with python skills. Now i have built this map generator. The only issue is that i can not manage to understand from any documents how to load obj files. At first i figured that i had to convert it to a .data file, but i dont understand how to do this. I just want to load a simple model of a house. I tried using the soya_editor, but i can not figure out at all how to do anything with that. Heres my script so far: import sys, os, os.path, soya, soya.sdlconst width, height = 760, 375 soya.init("Generator 0.1", width, height) soya.path.append(os.path.join(os.path.dirname(sys.argv[0]), "data")) scene = soya.World() model = soya.model.get("house") light = soya.Light(scene) light.set_xyz(0.5, 0.0, 2.0) camera = soya.Camera(scene) camera.z = 2.0 soya.set_root_widget(camera) soya.MainLoop(scene).main_loop() house is in .obj form at folder data/models The error i get is: Traceback (most recent call last): File "introduction.py", line 7, in <module> model = soya.Model.get("house") File "/usr/lib/pymodules/python2.6/soya/__init__.py", line 259, in get return klass._alls.get(filename) or klass._alls.setdefault(filename, klass.load(filename)) File "/usr/lib/pymodules/python2.6/soya/__init__.py", line 268, in load dirname = klass._get_directory_for_loading_and_check_export(filename) File "/usr/lib/pymodules/python2.6/soya/__init__.py", line 194, in _get_directory_for_loading_and_check_export dirname = klass._get_directory_for_loading(filename, ext) File "/usr/lib/pymodules/python2.6/soya/__init__.py", line 171, in _get_directory_for_loading raise ValueError("Cannot find a %s named %s!" % (klass, filename)) ValueError: Cannot find a <class 'soya.Model'> named house! * Soya3D * Quit... So i am figuring that because i dont understand how to turn my files into .data files, i will need to learn that. So my question is, how do i use my own models?

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  • Indian school boy never misses a class for 14 years. Applies for Gunnies Records

    - by Gopinath
    If you ask the question “What is the most fun activity?” to school or college kids, most of the kids would say “bunking classes”. Many of us are grown up bunking classes in the name of stomachache, relatives marriage, high fever, rain or some other reason. Here is a wonder kid who is an exception of regular school kids. Mohammed Omar, a 17 year Indian school boy, never skipped his classes for the past 14 years. His attendance records shows 100% for all the 14 years of school he attended so far and it’s an unbelievable track record. Omar lives in Kanpur, a suburban in Uttar Pradesh with parents and a younger brother. He attended school even when the area where he lives was once flooded, had high temperature. When flooded and motor vehicles were not able to run on the streets he loaned a bicycle from neighbors. When he was on high temperature he just popped a tablet and headed towards the school.  Whatever may be the adverse situation, he just found a way to attend school instead of bunking. He recently applied for Guinness Book of World Records. The determination of the boy is incredible and inspiration to many young. I  wish to see this guy soon flashing on TV Channels with Guinness World Records certificates on his hands. Source: NDTV, creative common image: flickr/seeveeaar

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  • How do I make changes to /proc/acpi/wakeup permanent?

    - by Jolan
    I had a problem with my Ubuntu 12.04 waking up immediately after going into suspend. I solved the problem by changing the settings in /proc/acpi/wakeup, as suggested in this question: How do I prevent immediate wake up from suspend?. After changing the settings, the system goes flawlessly into suspend and stays suspended, but after I wake it back up, the settings in /proc/acpi/wakeup are different from what I set them to. Before going to suspend: cat /proc/acpi/wakeup Device S-state Status Sysfs node SMB0 S4 *disabled pci:0000:00:03.2 PBB0 S4 *disabled pci:0000:00:09.0 HDAC S4 *disabled pci:0000:00:08.0 XVR0 S4 *disabled pci:0000:00:0c.0 XVR1 S4 *disabled P0P5 S4 *disabled P0P6 S4 *disabled pci:0000:00:15.0 GLAN S4 *enabled pci:0000:03:00.0 P0P7 S4 *disabled pci:0000:00:16.0 P0P8 S4 *disabled P0P9 S4 *disabled USB0 S3 *disabled pci:0000:00:04.0 USB2 S3 *disabled pci:0000:00:04.1 US15 S3 *disabled pci:0000:00:06.0 US12 S3 *disabled pci:0000:00:06.1 PWRB S4 *enabled SLPB S4 *enabled I tell the system to suspend, and it works as it should. But later after waking it up, the settings are changed to either: USB0 S3 *disabled pci:0000:00:04.0 USB2 S3 *enabled pci:0000:00:04.1 US15 S3 *disabled pci:0000:00:06.0 US12 S3 *enabled pci:0000:00:06.1 or USB0 S3 *enabled pci:0000:00:04.0 USB2 S3 *enabled pci:0000:00:04.1 US15 S3 *enabled pci:0000:00:06.0 US12 S3 *enabled pci:0000:00:06.1 Any ideas? Thank you for your response. Unfortunately it did not solve my problem. all of /sys/bus/usb/devices/usb1/power/wakeup /sys/bus/usb/devices/usb2/power/wakeup /sys/bus/usb/devices/usb3/power/wakeup /sys/bus/usb/devices/usb4/power/wakeup as well as /sys/bus/usb/devices/3-1/power/wakeup are set to disabled, and the notebook still wakes up by itself right after going to sleep. The only thing it seems to react to are the settings in /proc/acpi/wakeup, which keep changing (resetting) every time i power off/restart my notebook.

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  • Where is the SQL Azure Development Environment

    - by BuckWoody
    Recently I posted an entry explaining that you can develop in Windows Azure without having to connect to the main service on the Internet, using the Software Development Kit (SDK) which installs two emulators - one for compute and the other for storage. That brought up the question of the same kind of thing for SQL Azure. The short answer is that there isn’t one. While we’ll make the development experience for all versions of SQL Server, including SQL Azure more easy to write against, you can simply treat it as another edition of SQL Server. For instance, many of us use the SQL Server Developer Edition - which in versions up to 2008 is actually the Enterprise Edition - to develop our code. We might write that code against all kinds of environments, from SQL Express through Enterprise Edition. We know which features work on a certain edition, what T-SQL it supports and so on, and develop accordingly. We then test on the actual platform to ensure the code runs as expected. You can simply fold SQL Azure into that same development process. When you’re ready to deploy, if you’re using SQL Server Management Studio 2008 R2 or higher, you can script out the database when you’re done as a SQL Azure script (with change notifications where needed) by selecting the right “Engine Type” on the scripting panel: (Thanks to David Robinson for pointing this out and my co-worker Rick Shahid for the screen-shot - saved me firing up a VM this morning!) Will all this change? Will SSMS, “Data Dude” and other tools change to include SQL Azure? Well, I don’t have a specific roadmap for those tools, but we’re making big investments on Windows Azure and SQL Azure, so I can say that as time goes on, it will get easier. For now, make sure you know what features are and are not included in SQL Azure, and what T-SQL is supported. Here are a couple of references to help: General Guidelines and Limitations: http://msdn.microsoft.com/en-us/library/ee336245.aspx Transact-SQL Supported by SQL Azure: http://msdn.microsoft.com/en-us/library/ee336250.aspx SQL Azure Learning Plan: http://blogs.msdn.com/b/buckwoody/archive/2010/12/13/windows-azure-learning-plan-sql-azure.aspx

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  • So&hellip; What is a SharePoint Developer?

    - by Mark Rackley
    A few days ago Stacy Draper and I were chatting about what it means to be a SharePoint Developer. That actually turns about to be a conversation with lots of shades of grey. Stacy thought it would make a good blog post… well, I can’t promise this to be a GOOD blog post… So, anyway, I decided to let off a little bomb this morning by posting the following tweet on Twitter: @mrackley: Can someone be considered a SharePoint Developer if all they know how to do is work in SPD? Now, I knew this is a debate that has been going on since the first SharePoint Designer User put SharePoint Developer on their resume. There are probably several blogs out there on the subject, but with the wildfire that is jQuery and a few other new features out there I believe it is an important subject to tackle again. I got a lot of great feedback as well on Twitter. The entire twitter conversation is at the end of this blog posting. Thanks everyone for their opinions. Who cares? Why does it matter? Can’t we all just get along? Yes it matters… everything must be labeled and put in it’s proper place. Pigeon holing is the only way to go!  Just kidding.. I’m not near that anal, but yes! It is important to be able to properly identify the skill set of those people on your team and correctly identify the role you are wanting to hire. Saying you are a “SharePoint Developer” is just too vague and just barely begins to answer the question. Also, knowing who’s on your team and what they can do will ensure you give your clients the best people for the job. A Developer writes code right? So, a Developer uses Visual Studio! Whoa, hold on there Sparky. Even if I concede that to be a developer you have to write code then you still can’t say a SharePoint Developer has to use Visual Studio.  So, you can spell C#, how well can you write XSLT? How’s your jQuery? Sorry bud, that’s code whether you like it or not. There are many ways to write code in SharePoint that have nothing to do with cracking open Visual Studio. So, what are the different ways to develop in SharePoint then? How many different ways can you “develop” in SharePoint?? A lot… Out of the box features In SharePoint you can create a site, create a custom list on that site, do basic calculations in a calculated column, set up alerts, and add all sorts of web parts to a page. Let’s face it.. that IS development! javaScript/jQuery Perhaps you’ve heard by now about this thing called jQuery? It’s all over the place and the answer to a lot of people’s prayers. However be careful, with great power comes great responsibility. Remember, javaScript is executed on the client side and if you abuse it your performance could be affected. Also, Marc Anderson (@sympmarc) wrote a pretty awesome javaScript library called SPServices.  This allows you to access SharePoint’s Web Services using jQuery. How freakin cool is that? With these tools at your disposal the number of things you CAN’T do without Visual Studio grows smaller and smaller. This is definitely development no matter what anyone else says and there is no Visual Studio involved. SharePoint Designer Ahhh.. The cause of and the answer to all of your SharePoint development problems. With SharePoint Designer you can use DataView Web Parts, develop (there’s that word again) your branding, and even connect to external datasources.  There’s a lot you can do in SharePoint Designer. It’s got it’s shortcomings, but it is an invaluable tool in the SharePoint developers toolbox. InfoPath So, can InfoPath development really be considered SharePoint development? I would say yes. You can connect to SharePoint lists, populate fields in a SharePoint list, and even write code in InfoPath. Sounds like SharePoint development to me. Visual Studio – Web Services/WCF So, get this. You can write code for SharePoint and not have a clue what the 12 hive is, what “site actions” means, or know how to do ANYTHING in SharePoint? Poppycock! You say? SharePoint Web Services I say… With SharePoint Web Services you can totally interact with SharePoint without knowing anything about SharePoint. I don’t recommend it of course, but it’s possible. What can you write using SharePoint Web Services? How about a little application called SharePoint Designer? Visual Studio – Object Model And here we are finally:  the SharePoint Object Model.  When you hear “SharePoint Developer” most people think of someone opening Visual Studio and creating a custom web part, workflow, event receiver, etc.. etc.. but I hope that by now I have made the point that this is NOT the only form of SharePoint Development! Again… Who cares? Just crack open Visual Studio for everything! Problem solved! Let’s ponder for a moment, shall we? The business comes to you with a requirement that involves some pretty fancy business calculations, and a complicated view that they do NOT want to look like SharePoint. “No Problem” you proclaim you mighty SharePoint Developer. You go back to your cube, chuckle at the latest Dilbert comic, and crack open Visual Studio. Then you build your custom web part… fight with all the deployment, migration, and UAT that you must go through and proclaim victory two weeks later!!!! Well done my good sir/ma’am! Oh wait… it turns out Sally who is not a “developer” did the exact same thing with a Dataview web part and some jQuery and it’s been in production for two weeks? #CockinessFail I know there are many ASP.NET developers out there that can create a custom control and wrap it to be a SharePoint Web Part.  That does NOT mean they are SharePoint Developers though as far as I’m concerned and I personally would much rather have someone on my team that can manipulate the heck (yes, I said ‘heck’) out of SharePoint using Dataview Web Parts, jQuery, and a roll of duct tape. Just because you know how to write code in Visual Studio does not mean you are a SharePoint Developer. What’s the conclusion here? How do we define ‘it’ and what ‘it’ is called? Fortunately, this is MY blog. I don’t have to give answers, I can stir the pot, laugh and leave you to ponder what it means! There is obviously no right or wrong answer here (unless you disagree with me,then you are flat out wrong). Anyway, there are many opinions.  Here’s mine.  If you put SharePoint Developer on your resume make sure to clearly specify HOW you develop in SharePoint and what tools you use. If we must label these gurus of jQuery and SPD, how about “SharePoint Client Developer” or “SharePoint Front End Developer”? Just throwing out an idea. Whatever we call them, to say they are not developers is short-sighted, arrogant, and unfair. Of course, then we need to figure out what to call all those other SharePoint development types.  Twitter Conversation @next_connect: RT @mrackley: Can someone be considered a SharePoint Developer if all they know how to do is work in SPD? | I say no.... @mikegil:  @mrackley re: yr Developer question: SPD expert <> SP Developer. Can be "sous-developer," though. #SharePoint #SPD @WonderLaura:  Rt @mrackley Can someone be considered a SharePoint Dev if all they know how to do is work in SPD? -- My opinion is that devs write code. @exnav29:  Rt @mrackley Can someone be considered a SharePoint Dev if all they know how to do is work in SPD? => I think devs would use VS as well @ssKevin:  @WonderLaura @mrackley does that mean strictly vb and c# when it comes to #SharePoint ? @jimmywim:  @exnav29 @mrackley nah, I'd say they were a power user. Devs know their way around the 12 hive ;) @sympmarc:  RT @mrackley: Can someone be considered a SharePoint Developer if all they know how to do is work in SPD? -> Fighting words. @sympmarc:  @next_connect @mrackley Besides, we prefer to be called "hacks". ;+) @next_connect:  @sympmarc The important thing is that you don't have to develop code to solve problems and create solutions. @mrackley @mrackley:  @sympmarc @next_connect not tryin to pick fight.. just try and find consensus on definition @usher:  @mrackley I'd still argue that you have a DevLite title that's out there for the collaboration engineers (@sympmarc @next_connect) @next_connect: @usher I agree. I've called it Light Dev/ Configuration before. @sympmarc @mrackley @usher:  @next_connect I like DevLite, low calorie but still same great taste :) @mrackley @sympmarc @mrackley:  @next_connect @usher @sympmarc I don't think there's any "lite" to someone who can bend jQuery and XSLT to their will. @usher:  @mrackley okay, so would you refer to someone that writes user controls and assemblies something different (@next_connect @sympmarc) @usher:  @mrackley when looking for a developer that can write .net code, it's a bit different than an XSLT/jQuery designer. @sympmarc @next_connect @jimmywim:  @mrackley @sympmarc @next_connect I reckon a "dev" does managed code and works in the 12 hive @sympmarc:  @jimmywim @mrackley @next_connect We had a similar debate a few days ago @toddbleeker et al @sympmarc:  @sympmarc @jimmywim @mrackley @next_connect @toddbleeker @stevenmfowler More abt my Middle Tier term, but still connected. Meet bus need. @toddbleeker:  @sympmarc @jimmywim @mrackley @next_connect I used "No Assembly Required" in the past. I also suggested "Supplimenting the SharePoint DOM" @toddbleeker:  @sympmarc @jimmywim @mrackley @next_connect Others suggested Information Worker Solutions/Enhancements @toddbleeker:  @sympmarc @jimmywim @mrackley @next_connect @stevenmfowler I also like "SharePoint Scripting Solutions". All the technologies are script. @jimmywim:  @toddbleeker @sympmarc @mrackley @next_connect I like the IW solutions one... @toddbleeker:  @sympmarc @jimmywim @mrackley @next_connect @stevenmfowler This is like the debate that never ends: it is definitely not called Middle Tier. @jimmywim:  @toddbleeker @sympmarc @mrackley @next_connect @stevenmfowler "Scripting" these days makes me think PowerShell... @sympmarc:  @toddbleeker @jimmywim @mrackley @next_connect @stevenmfowler If it forces a debate on h2 best solve bus probs, I'll keep sayin Middle Tier. @usher:  @sympmarc so we know what we're looking for, we just can't define a name? @toddbleeker @jimmywim @mrackley @next_connect @stevemfowler @sympmarc:  @usher @sympmarc @toddbleeker @jimmywim @mrackley @next_connect @stevemfowler The naming seems to matter more than the substance. :-( @jimmywim:  @sympmarc @usher @toddbleeker @mrackley @next_connect @stevemfowler work brkdn defines tasks, defines tools needed, can then b grp'd by user @WonderLaura:  @mrackley @toddbleeker @jimmywim @sympmarc @usher @next_connect Funny you're asking. @johnrossjr and I spent hours this week on the subject. @stevenmfowler:  RT @toddbleeker: @sympmarc @jimmywim @mrackley @next_connect @stevenmfowler it is definitely not called Middle Tier. < I'm with Todd

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  • Converting 2D coordinates from multiple viewpoints into 3D coordinates

    - by Kirk Smith
    Here's the situation. I've got a set of 2D coordinates that specify a point on an image. These 2D coordinates relate to an event that happened in a 3D space (video game). I have 5 images with the same event point on it, so I have 5 sets of 2D coordinates for a single 3D coordinate. I've tried everything I can think to translate these 2D coordinates into 3D coordinates, but the math just escapes me. I have a good estimate of the coordinates from which each image was taken, they're not perfect but they're close. I tried simplifying this and opening up Cinema 4D, a 3D modeling application. I placed 5 cameras at the coordinates where the pictures were taken and lined up the pictures with the event points for each one and tried to find a link, but nothing was forthcoming. I know it's a math question, but like I said, I just can't get it. I took physics in high school 6 years ago, but we didn't deal with a whole lot of this sort of thing. Any help will be very much appreciated, I've been thinking on it for quite a while and I just can't come up with anything.

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  • Can I use Ubuntu One to sync data fiies between two remote computers

    - by Sleepy John
    I've got two computers, both running Ubuntu with files in their home folders sync'd in to Ubuntu One. I'd like to know if it's possible to make Ubuntu One automatically download data changes that have been uploaded automatically to Ubuntu One from one computer to the equivalent data file in the other. Clarifying a bit further, I've installed Red Notebook in both computers and so they each have their own /.rednotebook/data folder containing a series of .txt files corresponding to the monthly entries in each of them. These are sync'd to upload any changes to those .txt files to Ubuntu One. My question is can I, and if so how, do I make Ubuntu One automatically download and replace those .txt files in the other computer after they've been updated and uploaded from the first computer? I did labouriously manage to download all those text files which had been uploaded from the first computer, from Ubuntu One one-by-one to the second computer, but what I want to do is automate this process and that's where I'm stuck. I'm aware that things could get a bit complicated if both my computers were on-line at the same time and both were simultaneously making different Red Notebook entries, so that's not the scenario I'm trying to cover. All I want to achieve is that whatever updates to the files have been uploaded by one computer, will automatically be downloaded to the same-named files in the other computer as soon as that second computer appears on line and detects that Ubuntu One has matching but more recent sync'd files than the ones it's holding.

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  • How to change the screen resolution in VNC viewer for Ubuntu 12.04 without a monitor?

    - by user325320
    I have Ubuntu 12.04 installed on a machine and I always use it remotely from VNC. When I have monitor connected to this machine, I can change the resolution of my VNC viewer in the following line: $vnc4server --geometry 1440x900 This worked for me, but I always use this machine remotely, I unplug the monitor and reboot. and the above command line not work anymore. Then I tried xrandr SZ: Pixels Physical Refresh *0 1024 x 768 ( 260mm x 195mm ) *60 Current rotation - normal Current reflection - none Rotations possible - normal Reflections possible - none There is only one option available, so I tried to add a new one. $cvt 1440 900 # 1440x900 59.89 Hz (CVT 1.30MA) hsync: 55.93 kHz; pclk: 106.50 MHz Modeline "1440x900_60.00" 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync $xrandr --newmode "1440x900_60.00" 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync $xrandr --addmode S2 "1440x900_60.00" then I checked with xrandr again and can't see the new mode added. I try to execute the following command and get error says my RandR is too old. $xrandr --output S2 --mode 1440x900_60.00 xrandr: Server RandR version before 1.2 but this does not make sense to me, if I plug in the monitor back and run the xrandr command, it works again! It seems that Ubuntu must conntect to a real monitor before I can change my resolution in my VNC viewer. Can anyone help? UPDATE: Finally I solved this problem by changing to tightvncserver $tightvncserver -geometry 1440x900 works for me. Thanks everything answered my question

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  • Keystone Correction using 3D-Points of Kinect

    - by philllies
    With XNA, I am displaying a simple rectangle which is projected onto the floor. The projector can be placed at an arbitrary position. Obviously, the projected rectangle gets distorted according to the projectors position and angle. A Kinect scans the floor looking for the four corners. Now my goal is to transform the original rectangle such that the projection is no longer distorted by basically pre-warping the rectangle. My first approach was to do everything in 2D: First compute a perspective transformation (using OpenCV's warpPerspective()) from the scanned points to the internal rectangle's points und apply the inverse to the rectangle. This seemed to work but was too slow as it couldn't be rendered on the GPU. The second approach was to do everything in 3D in order to use XNA's rendering features. First, I would display a plane, scan its corners with Kinect and map the received 3D-Points to the original plane. Theoretically, I could apply the inverse of the perspective transformation to the plane, as I did in the 2D-approach. However, in since XNA works with a view and projection matrix, I can't just call a function such as warpPerspective() and get the desired result. I would need to compute the new parameters for the camera's view and projection matrix. Question: Is it possible to compute these parameters and split them into two matrices (view and projection)? If not, is there another approach I could use?

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  • Does JAXP natively parse HTML?

    - by ikmac
    So, I whip up a quick test case in Java 7 to grab a couple of elements from random URIs, and see if the built-in parsing stuff will do what I need. Here's the basic setup (with exception handling etc omitted): DocumentBuilderFactory dbfac = DocumentBuilderFactory.newInstance(); DocumentBuilder dbuild = dbfac.newDocumentBuilder(); Document doc = dbuild.parse("uri-goes-here"); With no error handler installed, the parse method throws exceptions on fatal parse errors. When getting the standard Apache 2.2 directory index page from a local server: a SAXParseException with the message White spaces are required between publicId and systemId. The doctype looks ok to me, whitespace and all. When getting a page off a Drupal 7 generated site, it never finishes. The parse method seems to hang. No exceptions thrown, never returns. When getting http://www.oracle.com, a SAXParseException with the message The element type "meta" must be terminated by the matching end-tag "</meta>". So it would appear that the default setup I've used here doesn't handle HTML, only strictly written XML. My question is: can JAXP be used out-of-the-box from openJDK 7 to parse HTML from the wild (without insane gesticulations), or am I better off looking for an HTML 5 parser? PS this is for something I may not open-source, so licensing is also an issue :(

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  • Ur/Web new purely functional language for web programming?

    - by Phuc Nguyen
    I came across the Ur/Web project during my search for web frameworks for Haskell-like languages. It looks like a very interesting project done by one person. Basically, it is a domain-specific purely functional language for web programming, taking the best of ML and Haskell. The syntax is ML, but there are type classes and monad from Haskell, and it's strictly evaluated. Server-side is compiled to native code, client to Javascript. See the slides and FAQ page for other advertised advantages. Looking at the demos and their source code, I think the project is very promising. The latest version is something 20110123, so it seems to be under active development at this time. My question: Has anybody here had any further experience with it? Are there problems/annoyances compared to Haskell, apart from ML's slightly more verbose syntax? Even if it's not well known yet, I hope more people will know of it. OMG this looks very cool to me. I don't want this project to die!!

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  • ODI 11g - Scripting a Reverse Engineer

    - by David Allan
    A common question is related to how to script the reverse engineer using the ODI SDK. This follows on from some of my posts on scripting in general and accelerated model and topology setup. Check out this viewlet here to see how to define a reverse engineering process using ODI's package. Using the ODI SDK, you can script this up using the OdiPackage and StepOdiCommand classes as follows;  OdiPackage pkg = new OdiPackage(folder, "Pkg_Rev"+modName);   StepOdiCommand step1 = new StepOdiCommand(pkg,"step1_cmd_reset");   step1.setCommandExpression(new Expression("OdiReverseResetTable \"-MODEL="+mod.getModelId()+"\"",null, Expression.SqlGroupType.NONE));   StepOdiCommand step2 = new StepOdiCommand(pkg,"step2_cmd_reset");   step2.setCommandExpression(new Expression("OdiReverseGetMetaData \"-MODEL="+mod.getModelId()+"\"",null, Expression.SqlGroupType.NONE));   StepOdiCommand step3 = new StepOdiCommand(pkg,"step3_cmd_reset");   step3.setCommandExpression(new Expression("OdiReverseSetMetaData \"-MODEL="+mod.getModelId()+"\"",null, Expression.SqlGroupType.NONE));   pkg.setFirstStep(step1);   step1.setNextStepAfterSuccess(step2);   step2.setNextStepAfterSuccess(step3); The biggest leap of faith for users is getting to know which SDK classes have to be used to build the objects in the design, using StepOdiCommand isn't necessarily obvious, once you see it in action though it is very simple to use. The above snippet uses an OdiModel variable named mod, its a snippet I added to the accelerated model creation script in the post linked above.

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  • Code Trivia #4

    - by João Angelo
    Got the inspiration for this one in a recent stackoverflow question. What should the following code output and why? class Program { class Author { public string FirstName { get; set; } public string LastName { get; set; } public override string ToString() { return LastName + ", " + FirstName; } } static void Main() { Author[] authors = new[] { new Author { FirstName = "John", LastName = "Doe" }, new Author { FirstName = "Jane", LastName="Doe" } }; var line1 = String.Format("Authors: {0} and {1}", authors); Console.WriteLine(line1); string[] serial = new string[] { "AG27H", "6GHW9" }; var line2 = String.Format("Serial: {0}-{1}", serial); Console.WriteLine(line2); int[] version = new int[] { 1, 0 }; var line3 = String.Format("Version: {0}.{1}", version); Console.WriteLine(line3); } } Update: The code will print the first two lines // Authors: Doe, John and Doe, Jane // Serial: AG27H-6GHW9 and then throw an exception on the third call to String.Format because array covariance is not supported in value types. Given this the third call of String.Format will not resolve to String.Format(string, params object[]), like the previous two, but to String.Format(string, object) which fails to provide the second argument for the specified format and will then cause the exception.

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  • Java devs: why not use Groovy?

    - by FarmBoy
    OK, so there are quite a few people using Java these days. But as the language nears two decades of age, it isn't exactly the coolest option out there. Many of us are excited about dynamic languages with some functional features like Ruby or Python, even though we spend our days using Java. So why is it that the adoption of Groovy has been so slow? It seems that Groovy offers much of the benefits of Ruby and Python, but it is far easier to transition a Java shop to Groovy. Even if performance were the concern, it seems that many would want to use Groovy for testing the production Java code. Or use Groovy/Grails for internal apps in which performance concerns are minimal. Or for writing one-off scripts to generate code. Yet Groovy languishes outside of Tiobe's top 50 languages, for reasons that are unclear to me. I have been using Groovy and Grails professionally for about four months, and it has been an excellent experience, such that I hate to think about going back to the Java/Spring/Hibernate model. Does anyone have any sense on why we are not seeing more significant migration from Java to Groovy? Note that I'm not asking why Java developers are still using Java for new projects. My question is: Why is it that most Java Developers are still not using Groovy at all. Edit: I am assuming that all good developers see the utility of dynamic typing and higher order functions for some programming tasks. (Even if it is deemed inappropriate for production code.)

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  • Understanding UML composition better

    - by Prog
    The technical difference between Composition and Aggregation in UML (and sometimes in programming too) is that with Composition, the lifetime of the objects composing the composite (e.g. an engine and a steering wheel in a car) is dependent on the composite object. While with Aggregation, the lifetime of the objects making up the composite is independent of the composite. However I'm not sure about something related to composition in UML. Say ClassA is composed of an object of ClassB: class ClassA{ ClassB bInstance; public ClassA(){ bInstance = new ClassB(); } } This is an example of composition, because bInstance is dependent on the lifetime of it's enclosing object. However, regarding UML notation - I'm not sure if I would notate the relationship between ClassA and ClassB with a filled diamond (composition) or a white diamond (aggregation). This is because while the lifetime of some ClassB instances is dependent of ClassA instances - there could be ClassB instances anywhere else in the program - not only within ClassA instances. The question is: if ClassA objects are composed of ClassB objects - but other ClassB objects are free to be used anywhere else in the program: Should the relationship between ClassA and ClassB be notated as aggregation or as composition?

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  • Game physics presentation by Richard Lord, some questions

    - by Steve
    I been implementing (in XNA) the examples in this physics presentation by Richard Lord where he discusses various integration techniques. Bearing in mind that I am a newcomer to game physics (and physics in general) I have some questions. 15 slides in he shows ActionScript code for a gravity example and an animation showing a bouncing ball. The ball bounces higher and higher until it is out of control. I implemented the same in C# XNA but my ball appeared to be bouncing at a constant height. The same applies to the next example where the ball bounces lower and lower. After some experimentation I found that if I switched to a fixed timestep and then on the first iteration of Update() I set the time variable to be equal to elapsed milliseconds (16.6667) I would see the same behaviour. Doing this essentially set the framerate, velocity and acceleration to zero for the first update and introduced errors(?) into the algorithm causing the ball's velocity to increase (or decrease) over time. I think! My question is, does this make the integration method used poor? Or is it demonstrating that it is poor when used with variable timestep because you can't pass in a valid value for the first lot of calculations? (because you cannot know the framerate in advance). I will continue my research into physics but can anyone suggest a good method to get my feet wet? I would like to experiment with variable timestep, acceleration that changes over time and probably friction. Would the Time Corrected Verlet be OK for this?

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  • Ubuntu eats itself after I followed updater instruction

    - by Tony Martin
    Updater (I assume) put a no entry style alert icon on the panel which informed me that certain package dependencies were not up to snuff. Upgrades were thereafter only partial. The dialogue advised that I (and this is from noob memory) sudo apt-get install -f. I did this and typed in the confirmation phrase and watched apt-get systematically remove every component of linux, both the stuff I installed and the core ubuntu packages. I could only assume at this stage that this was for a fresh install but of course, I know better now. There's much complaint about Windows, but I've never met with advice from Microsoft tools to wipe out the operating system because of a couple of missing .dlls. So what gives? This was a 64 bit install of 12.04. All that is left is grub pointing to a couple of windows recovery partitions on the hard drive. I'm tempted, but I have hopes of recovering the data that I had enough misguided faith to trust to the linux ext4 partition. I've tried pen driving back into it with a 32 bit iso but I'm simply informed that ubuntu is running in low graphics mode and get to watch the dots cycle indefinitely. EDIT: Thanks for the advice vis positive request. I've got onto the machine with a 64 bit stick and can see the file structure left behind by the installation. My first instinct was to run install from the stick but it did not seem to offer a recovery option. My question then: is there a way to recover the current installation so that if I reinstall the packages I had they will pick up the original settings. I'm particularly worried about losing email from evolution - the rest I could probably lash back together. I would also be interested how this disaster came about. I see people in the know recommending this same procedure in similar circumstances. Thanks for your attention, Tony Martin

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  • How should code reviews be Carried Out?

    - by Graviton
    My previous question has to do with how to advance code reviews among the developers. Here I am interested in how a code review session should be carried out, so that both the reviewer and reviewed are feeling comfortable with it. I have done some code reviews before and the experience has been very unpleasant. My previous manager would come to us --on an ad hoc basis-- and tell us to explain our code to him. Since he wasn't very familiar with the code base, whenever he would ask me to explain my code, I'd find myself spending a huge amount of time explaining the most basic structure of my code. As a result, each review would last much too long, and the process would leave both of us exhausted. Once I was done explaining my work, he would continue by raising issues with it. Most of the issues he raised were cosmetic in nature ( e.g, don't use region for this code block, change the variable name from xxx to yyy even though the later makes even less sense, and so on). After trying this process for few rounds, we found the review session didn't derive much benefits for either of us, and we stopped. How would you go about making each code review a natural, enjoyable, thought stimulating, bug-fixing and mutual-learning experience? Also, how frequently you do your code reviews - as soon as the code is checked in? Do you allocate a fixed time every week to do this? What are the guidelines that you follow during your code reviews?

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  • MSDN article on jQuery Mobile

    - by Wallym
    My article on jQuery Mobile has been published.  Please check it out.There’s no doubt about it. Wherever developers look and whoever they talk to, mobile is at the top of the list. Talk to a C-level executive, and the conversation turns to mobile, and the question “How do I get me some of that?” comes up. Talk to other developers, and they tell you they’re targeting mobile devices. Mobile has become a big deal as smartphones have taken hold in the consumer marketplace.In the years leading up to the current focus on mobile applications and devices, Web developers have been adding more and more client-side functionality to their applications. You can see this in the use of client-side JavaScript libraries like jQuery.With the growth of the market for mobile devices, the ability to create applications that run across platforms is very important for developers and for businesses that are trying to keep their expenses in check. There are a set of applications, mostly in the area of content consumption (think Amazon.com), that run well in a mobile Web browser. Unfortunately, there are differences between Web browsers on various mobile devices. The goal of the recently introduced jQuery Mobile (jQM) library is to provide cross-browser support to allow developers to build applications that can run across the various mobile Web browsers and provide the same—or at least a very similar—user interface.The jQuery Mobile library was introduced in an alpha release in the fall of 2010 and released to manufacturing in November 2011. At the time of this writing, the current version of jQuery Mobile is 1.1.1. By the time you read this, jQuery Mobile will almost certainly have reached version 1.2.0. The library has been embraced by Microsoft, Adobe and other companies for mobile Web development. In August 2011, jQM had 32 percent market share compared with other mobile JavaScript frameworks such as iWebKit and jQTouch. This market share is impressive given that it started from zero little more than 12 months ago, and the 1.0 release is the first officially supported release.

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