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• Calendario iSeminars Febrero-Mayo 2010

  - by [email protected]

  calendario iSeminars_Feb-May 2010.html

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• Windows expand over 2 monitors in quad-monitor setup

  - by Martin

  i just installed ubuntu 11.10 with my previous hardware setup: 4 monitors and 2 identical nvidia graphic cards. draging windows around all 4 monitors works nice, but when i maximize a window it expand always over 2 screens. (2x twinview). i had an workaround for this in 11.04 but cant remember what it was... may one of you guys have quad monitors up and running with window maximizing on only one screen my xorg.conf looks like this: # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 280.13 (buildd@allspice) Thu Aug 11 20:54:45 UTC 2011 # nvidia-xconfig: X configuration file generated by nvidia-xconfig # nvidia-xconfig: version 280.13 ([email protected]) Wed Jul 27 17:15:58 PDT 2011 Section "ServerLayout" # Removed Option "Xinerama" "1" # Removed Option "Xinerama" "0" Identifier "Layout0" Screen 0 "Screen0" 0 0 Screen 1 "Screen1" 0 1080 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "1" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" Identifier "Monitor0" VendorName "Unknown" ModelName "Samsung SMB2220N" HorizSync 31.0 - 80.0 VertRefresh 56.0 - 75.0 Option "DPMS" EndSection Section "Monitor" Identifier "Monitor1" VendorName "Unknown" ModelName "Samsung SMB2220N" HorizSync 31.0 - 80.0 VertRefresh 56.0 - 75.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GTX 550 Ti" BusID "PCI:2:0:0" EndSection Section "Device" Identifier "Device1" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GTX 550 Ti" BusID "PCI:3:0:0" EndSection Section "Screen" # Removed Option "TwinView" "True" # Removed Option "MetaModes" "nvidia-auto-select, nvidia-auto-select" # Removed Option "metamodes" "CRT-0: nvidia-auto-select 1920x1080 +0+0, CRT-1: nvidia-auto-select 1920x1080 +1920+0" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "TwinView" "1" Option "TwinViewXineramaInfoOrder" "CRT-0" Option "metamodes" "CRT-0: nvidia-auto-select +0+0, CRT-1: nvidia-auto-select +1920+0" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" # Removed Option "TwinView" "True" # Removed Option "MetaModes" "nvidia-auto-select, nvidia-auto-select" # Removed Option "metamodes" "CRT-0: nvidia-auto-select 1920x1080 +0+0, CRT-1: nvidia-auto-select 1920x1080 +1920+0" Identifier "Screen1" Device "Device1" Monitor "Monitor1" DefaultDepth 24 Option "TwinView" "1" Option "TwinViewXineramaInfoOrder" "CRT-0" Option "metamodes" "CRT-0: nvidia-auto-select +0+0, CRT-1: nvidia-auto-select +1920+0" SubSection "Display" Depth 24 EndSubSection EndSection Section "Extensions" Option "Composite" "Disable" EndSection

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• Amazon SOA: database as a Service

  - by Martin Lee

  There is an interesting interview with Werner Vogels which is partly about how Amazon does Service Oriented Architecture: For us service orientation means encapsulating the data with the business logic that operates on the data, with the only access through a published service interface. No direct database access is allowed from outside the service, and there’s no data sharing among the services. I do not understand that. Why do they need to 'wrap' a database into some layer if it already can be consumed as a service by other service through database adaptors? Does Amazon do that just because they need to expose the database to third parties or because of anything else? Why "no direct database access is allowed"? What are the advantages of such an architectural decision?

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• Why you need to tag your build servers in TFS

  - by Martin Hinshelwood

  At SSW we use gated check-in for all of our projects. The benefits are based on the number of developers you have working on your project. Lets say you have 30 developers and each developer breaks the build once per month. That could mean that you have a broken build every day! Gated check-ins help, but they have a down side that manifests as queued builds and moaning developers. The way to combat this is to have more build servers, but with that comes complexity. Inevitably you will need to install components that you would expect to be installed on target computers, but how do you keep track of which build servers have which bits? What about a geographically diverse team? If you have a centrally controlled infrastructure you might have build servers in multiple regions and you don’t want teams in Sydney copying files from Beijing and vice a versa on a regular basis. So, what is the answer. Its Tags. You can add a set of Tags to your agents and then set which tags to look for in the build definition. Figure: Open up your Build Controller Manager Select “Build | Manage Build Controllers…” to get a list of all of your controllers and he build agents that are associated with them. Figure: the list of build agents and their controllers Each of these Agents might be subtly different. For example only one of these agents has FTP software installed. This software is required for only one of the many builds we have set up. My ethos for build servers is to keep them as clean as possible and not to install anything that is not absolutely necessary. For me that means anything that does not add a *.target file is suspect, and should really be under version control and called via the command line from there. So, some of the things you may install are: Silverlight 4 SDK Visual Studio 2010 Visual Studio 2008 WIX etc You should not install things that will not end up on the target users computer. For a website that means something different to a client than to a server, but I am sure you get the idea. One thing you can do to make things easier is to create a tag for each of the things that you install. that way developers can find the things they need. We may change to using a more generic tagging structure (Like “Web Application” or “WinForms Application”) if this gets too unwieldy, but for now the list of tags is limited. Figure: Tags associated with one of our build agents Once you have your Build Agents all tagged up ALL your builds will start to fail This is because the default setting for a build is to look for an Agent that exactly matches the tags for the build, and we have not added any yet. The quick way to fix this is to change the “Tag Comparison Operator” from “ExactMatch” to “MatchAtLease” to get your build immediately working. Figure: Tag Comparison Operator changes to MatchAtLeast to get builds to run. The next thing to do is look for specific tags. You just select from the list of available tags and the controller will make sure you get to a build agent that uses them. Figure: I want Silverlight, VS2010 and WIX, but do not care about Location. And there you go, you can now have build agents for different purposes and regions within the same environment. You can also use name filtering, so if you have a good Agent naming convention you can filter by that for regions. For example, your Agents might be “SYDVMAPTFSBP01” and “SYDVMAPTFSBP02” so a name filter of “SYD*” would target all of the Sydney build agents. Figure: Agent names can be used for filtering as well This flexibility will allow you to build better software by reducing the likelihood of not having a certain dependency on the target machines. Figure: Setting the name filter based on server location  Used in combination there is a lot of power here to coordinate tens of build servers for multiple projects across multiple regions so your developers get the most out of your environment. Technorati Tags: ALM,TFBS,TFS 2010,TFS Admin

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• Creating a branch for every Sprint

  - by Martin Hinshelwood

  There are a lot of developers using version control these days, but a feature of version control called branching is very poorly understood and remains unused by most developers in favour of Labels. Most developers think that branching is hard and complicated. Its not! What is hard and complicated is a bad branching strategy. Just like a bad software architecture a bad branch architecture, or one that is not adhered to can prove fatal to a project. We I was at Aggreko we had a fairly successful Feature branching strategy (although the developers hated it) that meant that we could have multiple feature teams working at the same time without impacting each other. Now, this had to be carefully orchestrated as it was a Business Intelligence team and many of the BI artefacts do not lend themselves to merging. Today at SSW I am working on a Scrum team delivering a product that will be used by many hundreds of developers. SSW SQL Deploy takes much of the pain out of upgrading production databases when you are not using the Database projects in Visual Studio. With Scrum each Scrum Team works for a fixed period of time on a single sprint. You can have one or more Scrum Teams involved in delivering a product, but all the work must be merged and tested, ready to be shown to the Product Owner at the the Sprint Review meeting at the end of the current Sprint. So, what does this mean for a branching strategy? We have been using a “Main” (sometimes called “Trunk”) line and doing a branch for each sprint. It’s like Feature Branching, but with only ONE feature in operation at any one time, so no conflicts Figure: DEV folder containing the Development branches.   I know that some folks advocate applying a Label at the start of each Sprint and then rolling back if you need to, but I have always preferred the security of a branch. Like: being able to create a release from Main that has Sprint3 code even while Sprint4 is being worked on. being sure I can always create a stable build on request. Being able to guarantee a version (labels are not auditable) Be able to abandon the sprint without having to delete the code (rare I know, but would be a mess if it happened) Being able to see the flow of change sets through to a safe release It helps you find invalid dependencies when merging to Main as there may be some file that is in everyone’s Sprint branch, but never got checked in. (We had this at the merge of Sprint2) If you are always operating in this way as a standard it makes it easier to then add more scrum teams in the future. Muscle memory of this way of working. Don’t Like: Additional DB space for the branches Baseless merging between sprint branches when changes are directly ported Note: I do not think we will ever attempt this! Maybe a bit tougher to see the history between sprint branches since the changes go up through Main and down to another sprint branch Note: What you would have to do is see which Sprint the changes were made in and then check the history he same file in that Sprint. A little bit of added complexity that you would have to do anyway with multiple teams. Over time, you can end up with a lot of old unused sprint branches. Perhaps destroy with /keephistory can help in this case. Note: We ALWAYS delete the Sprint branch after it has been merged into Main. That is the theory anyway, and as you can see from the images Sprint2 has already been deleted. Why take the chance of having a problem rolling back or wanting to keep some of the code, when you can just abandon a branch and start a new one? It just seems easier and less painful to use a branch to me! What do you think?   Technorati Tags: TFS,TFS2010,Software Development,ALM,Branching

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• Silverlight 4, MVVM and Test-Driven Development

  - by Martin Hinshelwood

  As part of his UK tour Microsoft's Jesse Liberty will be talking in Edinburgh for an evening on Silverlight 4. [Register Now, there are some places left]  The Talk MVVM and Silverlight to build test-driven programs Understanding Refactoring and Dependency Injection A Walk through of a non-trivial application The Speaker Jesse Liberty, Silverlight Geek, is a Developer Community Program Manager for Microsoft (US). Lately he has been focused on Component-based, Test-Driven, Cross-platform line-of-business application development, and has led the development of the open source  Silverlight HyperVideo Platform. Liberty is the author of over two dozen books, and his blog is a required resource for Silverlight programmers. His twenty years of programming experience include stints as a Distinguished Software Engineer at AT&T; Vice President of Human-Computer Interaction at Citibank and Software Architect at PBS/Learning Link. The Venue We are meeting at Microsoft's offices in Edinburgh in Waterloo Place. This is the building on the corner of North Bridge at the east end of Princes Street. Parking can be found at the nearby Greenside Row car park which is just off Leith Walk (used for the Omni Centre). The venue is approximately 2-3 minutes walk away from Edinburgh Waverly train station. The Agenda 18:30 Doors open 19:00 Welcome 19:10 Part 1 20:00 Break 20:10 Part 2 20:50 Feedback and Prizes 21:00 End   [Register Now, there are some places left] Technorati Tags: Silverlight,MVVM,TDD

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• Fastest pathfinding for static node matrix

  - by Sean Martin

  I'm programming a route finding routine in VB.NET for an online game I play, and I'm searching for the fastest route finding algorithm for my map type. The game takes place in space, with thousands of solar systems connected by jump gates. The game devs have provided a DB dump containing a list of every system and the systems it can jump to. The map isn't quite a node tree, since some branches can jump to other branches - more of a matrix. What I need is a fast pathfinding algorithm. I have already implemented an A* routine and a Dijkstra's, both find the best path but are too slow for my purposes - a search that considers about 5000 nodes takes over 20 seconds to compute. A similar program on a website can do the same search in less than a second. This website claims to use D*, which I have looked into. That algorithm seems more appropriate for dynamic maps rather than one that does not change - unless I misunderstand it's premise. So is there something faster I can use for a map that is not your typical tile/polygon base? GBFS? Perhaps a DFS? Or have I likely got some problem with my A* - maybe poorly chosen heuristics or movement cost? Currently my movement cost is the length of the jump (the DB dump has solar system coordinates as well), and the heuristic is a quick euclidean calculation from the node to the goal. In case anyone has some optimizations for my A*, here is the routine that consumes about 60% of my processing time, according to my profiler. The coordinateData table contains a list of every system's coordinates, and neighborNode.distance is the distance of the jump. Private Function findDistance(ByVal startSystem As Integer, ByVal endSystem As Integer) As Integer 'hCount += 1 'If hCount Mod 0 = 0 Then 'Return hCache 'End If 'Initialize variables to be filled Dim x1, x2, y1, y2, z1, z2 As Integer 'LINQ queries for solar system data Dim systemFromData = From result In jumpDataDB.coordinateDatas Where result.systemId = startSystem Select result.x, result.y, result.z Dim systemToData = From result In jumpDataDB.coordinateDatas Where result.systemId = endSystem Select result.x, result.y, result.z 'LINQ execute 'Fill variables with solar system data for from and to system For Each solarSystem In systemFromData x1 = (solarSystem.x) y1 = (solarSystem.y) z1 = (solarSystem.z) Next For Each solarSystem In systemToData x2 = (solarSystem.x) y2 = (solarSystem.y) z2 = (solarSystem.z) Next Dim x3 = Math.Abs(x1 - x2) Dim y3 = Math.Abs(y1 - y2) Dim z3 = Math.Abs(z1 - z2) 'Calculate distance and round 'Dim distance = Math.Round(Math.Sqrt(Math.Abs((x1 - x2) ^ 2) + Math.Abs((y1 - y2) ^ 2) + Math.Abs((z1 - z2) ^ 2))) Dim distance = firstConstant * Math.Min(secondConstant * (x3 + y3 + z3), Math.Max(x3, Math.Max(y3, z3))) 'Dim distance = Math.Abs(x1 - x2) + Math.Abs(z1 - z2) + Math.Abs(y1 - y2) 'hCache = distance Return distance End Function And the main loop, the other 30% 'Begin search While openList.Count() != 0 'Set current system and move node to closed currentNode = lowestF() move(currentNode.id) For Each neighborNode In neighborNodes If Not onList(neighborNode.toSystem, 0) Then If Not onList(neighborNode.toSystem, 1) Then Dim newNode As New nodeData() newNode.id = neighborNode.toSystem newNode.parent = currentNode.id newNode.g = currentNode.g + neighborNode.distance newNode.h = findDistance(newNode.id, endSystem) newNode.f = newNode.g + newNode.h newNode.security = neighborNode.security openList.Add(newNode) shortOpenList(OLindex) = newNode.id OLindex += 1 Else Dim proposedG As Integer = currentNode.g + neighborNode.distance If proposedG < gValue(neighborNode.toSystem) Then changeParent(neighborNode.toSystem, currentNode.id, proposedG) End If End If End If Next 'Check to see if done If currentNode.id = endSystem Then Exit While End If End While If clarification is needed on my spaghetti code, I'll try to explain.

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• AS3 Stage3D Mouse click problem?

  - by Martin K

  I have a problem with Mouse interaction and Stage3D. The only way I found to register to listen to mouse clicks and interact with Stage3D, is to add a mouse eventListener directly to the .stage. However this will result in any time i click anywhere in the flash application the mouse click will fire, even if there is an overlaid 2D menu where the user intended to click. IE I have a 3D application running in the background, which listens to clicks, and I have some floating User Interface elements in the foreground, and ideally if I clicked a button in the foreground, then that would NOT fire a click event that the Stage3D would register. Any idea how to solve this problem?

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• Scrum with Team Foundation Server 2010 Done

  - by Martin Hinshelwood

  Since I have joined SSW as a Solution Architect its Chief Architect, Adam Cogan, has been mentoring me and pushing me to do better. One of the things that I have been wanting to do since the first DDD Scotland was to present a session. For DDD Scotland 2010 Adam suggested that I submit he double session on “Better project Management with Team Foundation Server 2010”. So, with some apprehension I submitted two session as Part A and Part B. Download DDD Scotland -  Scrum with Team Foundation Server 2010 How surprised was I that after the attendees had finished casting their votes that both sessions would be in the top 20 one in the top 5. I an effort to promote diversity in sessions the DDD committee try to make sure that each presenter only have one session. I would have to compress SSW’s presentation into 1 hour. Around this time SSW embarked on it continuing adventures with scrum an Microsoft started heavily investing in Scrum for its internal use. I decided to do a slightly different session, but one that would still meet the agenda and goal of the billed session to provide “Better project management with Team Foundation Server 2010”. And so Scrum with Team Foundation Server 2010 was born. At this stage I really have to thank Aaron Bjork who provided me with many of the slides and animations as I really can’t work Power Point. On the 27th of April I presented the session for the Aberdeen Partner Group and then on 8th May I presented at DDD Scotland. Figure: Some of the presenters and organisers of DDD Scotland I mentioned quite a few of SSW’s Rules to better Scrum Using TFS and I have uploaded my presentation to Skydrive.   Download DDD Scotland -  Scrum with Team Foundation Server 2010 Technorati Tags: DDD Scot,Scrum,TFS 2010,SSW

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• What have we lost from computers 20 years ago

  - by Martin Beckett

  Following the theme of - I can't believe computers used floppy disks and did you have debuggers 20 years ago - questions (and because even putting my age in hex I don't look young anymore). What have we lost from computers 20years ago? VMS versioning file system. Make a mistake, no problem myprog.cpp;5 is still there. Home computers that powered up to give you a wordprocessor or a basic prompt in <0.5sec User ports, serial ports and ADCs that you could control things with - without an arduino APIs that actually did what they said (even DOS interrupts), without having to guess and experiment your way through layers of frameworks.

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• Programa Talleres FMW Mayo y Junio 2010

  - by [email protected]

  PROGRAMA TALLERES FMW Mayo y Junio 2010 Enterprise 2.0 TALLER FECHA LOCALIZACIÓN Enterprise 2.0 y Redes Sociales Empresariales (Webcenter Spaces) 03/05/10 Madrid Digitalización (IP/M) 10/05/10 Madrid Gestión Documental y Records Management (UCM/URM) 11/05/10 Barcelona Gestión de Contenidos Web y portales (UCM + WC Suite) 25/05/10 Barcelona Gestión Documental y Records Management (UCM/URM) 19/05/10 Madrid Gestión de Contenidos Web y portales (UCM + WC Suite) 31/05/10 Madrid Service Oriented Architecture (SOA) TALLER FECHA LOCALIZACIÓN Construccion de Modelos de Negocio con BPEL 11g 13/05/10 Madrid Automatización de Procesos de Negocio con Oracle BPM 20/05/10 Madrid Oracle WebLogic 27/05/10 Madrid Gestión de Ciclo de Vida SOA Sobre un Repositorio Empresarial 11/05/10 Madrid Desarrollo de Aplicaciones de Alto Rendimiento con Oracle Coherence 18/05/10 Madrid Plataforma de Integración de Datos (ODI) 25/05/10 Madrid Business Activity Monitoring 11g (BAM) 13/05/10 Barcelona Inscribirse:

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• A talk about observer pattern

  - by Martin

  As part of a university course I'm taking, I have to hold a 10 minute talk about the observer pattern. So far these are my points: What is it? (defenition) Polling is an alternative Polling VS Observer When Observer is better When Polling is better (taken from here) A statement that Mediator pattern is worth checking out. (I won't have time to cover it in 10 minutes) I would be happy to hear about: Any suggestions to add something? Another alternative (if exists)

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• Sony Vaio Webcam

  - by Martin H

  I have a in-built webcam in my Sony Vaio VGN-FE21M. lsusb shows me the device Bus 001 Device 003: ID 0ac8:c002 Z-Star Microelectronics Corp. Visual Communication Camera VGP-VCC1 and it is working within Skype most of the time. Sometimes, however, lsusb shows me the exact same output, but trying to test my cam in v4l2ucp I get the error Unable to open file /dev/video0 No such file or directory A reboot fixes the problem but I just can't pinpoint what the difference is between a working and a not working webcam and the time/instance this occurs. It would probably be a fix if i could unmount and remount the cam, but how can I do this with in-built devices? Any other advice is welcome as well.

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• How to enable Unity 3D support in 12.04 using open-source drivers for RadeonHD cards?

  - by martin

  As the title says I can't enable the Unity 3D support when I'm using open-source drivers (xorg-edgers). I have an xfx Radeon HD 6950 by the way. If I install the proprietary 12.3 drivers from AMD it works, but I get poorer 2D performance than the open-source drivers and also I get some freezes and lock ups at random. So because of this I'm trying the open-source drivers and so far no issues at all, except this one. Running this command $ /usr/lib/nux/unity_support_test -p shows this: OpenGL vendor string: VMware, Inc. OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 0x300) OpenGL version string: 2.1 Mesa 8.0.2 Not software rendered: no Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: no And this command $ lspci -nn | grep VGA shows: 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Cayman PRO [Radeon HD 6950] [1002:6719] So, is this normal? Do I need to go back to proprietary drivers to enable Unity 3D? If anyone can give me help, I'll much appreciate it.

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• Upgrading Visual Studio 2010

  - by Martin Hinshelwood

  I have been running Visual Studio 2010 as my main development studio on my development computer since the RC was released. I need to upgrade that to the RTM, but first I need to remove it. Microsoft have done a lot of work to make this easy, and it works. Its as easy as uninstalling from the control panel. I have had may previous versions of Visual Studio 2010 on this same computer with no need to rebuild to remove all the bits. Figure: Run the uninstall from the control panel to remove Visual Studio 2010 RC Figure: The uninstall removes everything for you.  Figure: A green tick means the everything went OK. If you get a red cross, try installing the RTM anyway and it should warn you with what was not uninstalled properly and you can remove it manually.   Once you have VS2010 RC uninstalled installing should be a breeze. The install for 2010 is much faster than 2008. Which could take all day, and then some on slower computers. This takes around 20 minutes even on my small laptop. I always do a full install as although I have to do c# I sometimes get to use a proper programming language VB.NET. Seriously, there is nothing worse than trying to open a project and the other developer has used something you don't have. Its not their fault. Its yours! Save yourself the angst and install Fully, its only 5.9GB. Figure: I always select all of the options.   Now go forth and develop! Preferably in VB.NET…   Technorati Tags: Visual Studio,VS2010,VS 2010

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• iOS - pass UIImage to shader as texture

  - by martin pilch

  I am trying to pass UIImage to GLSL shader. The fragment shader is: varying highp vec2 textureCoordinate; uniform sampler2D inputImageTexture; uniform sampler2D inputImageTexture2; void main() { highp vec4 color = texture2D(inputImageTexture, textureCoordinate); highp vec4 color2 = texture2D(inputImageTexture2, textureCoordinate); gl_FragColor = color * color2; } What I want to do is send images from camera and do multiply blend with texture. When I just send data from camera, everything is fine. So problem should be with sending another texture to shader. I am doing it this way: - (void)setTexture:(UIImage*)image forUniform:(NSString*)uniform { CGSize sizeOfImage = [image size]; CGFloat scaleOfImage = [image scale]; CGSize pixelSizeOfImage = CGSizeMake(scaleOfImage * sizeOfImage.width, scaleOfImage * sizeOfImage.height); //create context GLubyte * spriteData = (GLubyte *)malloc(pixelSizeOfImage.width * pixelSizeOfImage.height * 4 * sizeof(GLubyte)); CGContextRef spriteContext = CGBitmapContextCreate(spriteData, pixelSizeOfImage.width, pixelSizeOfImage.height, 8, pixelSizeOfImage.width * 4, CGImageGetColorSpace(image.CGImage), kCGImageAlphaPremultipliedLast); //draw image into context CGContextDrawImage(spriteContext, CGRectMake(0.0, 0.0, pixelSizeOfImage.width, pixelSizeOfImage.height), image.CGImage); //get uniform of texture GLuint uniformIndex = glGetUniformLocation(__programPointer, [uniform UTF8String]); //generate texture GLuint textureIndex; glGenTextures(1, &textureIndex); glBindTexture(GL_TEXTURE_2D, textureIndex); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); //create texture glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, pixelSizeOfImage.width, pixelSizeOfImage.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, spriteData); glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_2D, textureIndex); //"send" to shader glUniform1i(uniformIndex, 1); free(spriteData); CGContextRelease(spriteContext); } Uniform for texture is fine, glGetUniformLocation function do not returns -1. The texture is PNG file of resolution 2000x2000 pixels. PROBLEM: When the texture is passed to shader, I have got "black screen". Maybe problem are parameters of the CGContext or parameters of the function glTexImage2D Thank you

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• When there's no TCO, when to worry about blowing the stack?

  - by Cedric Martin

  Every single time there's a discussion about a new programming language targetting the JVM, there are inevitably people saying things like: "The JVM doesn't support tail-call optimization, so I predict lots of exploding stacks" There are thousands of variations on that theme. Now I know that some language, like Clojure for example, have a special recur construct that you can use. What I don't understand is: how serious is the lack of tail-call optimization? When should I worry about it? My main source of confusion probably comes from the fact that Java is one of the most succesful languages ever and quite a few of the JVM languages seems to be doing fairly well. How is that possible if the lack of TCO is really of any concern?

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• Are project managers useful in Scrum?

  - by Martin Wickman

  There are three roles defined in Scrum: Team, Product Owner and Scrum Master. There is no project manager, instead the project manager job is spread across the three roles. For instance: The Scrum Master: Responsible for the process. Removes impediments. The Product Owner: Manages and prioritizes the list of work to be done to maximize ROI. Represents all interested parties (customers, stakeholders). The Team: Self manage its work by estimating and distributing it among themselves. Responsible for meeting their own commitments. So in Scrum, there is no longer a single person responsible for project success. There is no command-and-control structure in place. That seems to baffle a lot of people, specifically those not used to agile methods, and of course, PM's. I'm really interested in this and what your experiences are, as I think this is one of the things that can make or break a Scrum implementation. Do you agree with Scrum that a project manager is not needed? Do you think such a role is still required? Why?

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• SSW Scrum Rule: Do you know to use clear task descriptions?

  - by Martin Hinshelwood

  When you create tasks in Scrum you are doing this within a time box and you tend to add only the information you need to remember what the task is. And the entire Team was at the meeting and were involved in the discussions around the task, so why do you need more? Once you have accepted a task you should then add as much information as possible so that anyone can pick up that task; what if your numbers come up? Will you be into work the next day? Figure: What if your numbers come up in the lottery? What if the Team runs a syndicate and all your numbers come up? The point is that anything can happen and you need to protect the integrity of the project, the company and the Customer. Add as much information to the task as you think is necessary for anyone to work on the task. If you need to add rich text and images you can do this by attaching an email to the task.   Figure: Bad example, there is not enough information for a non team member to complete this task Figure: Julie provided a lot more information and another team should be able to pick this up. This has been published as Do you know to ensure that relevant emails are attached to tasks in our Rules to Better Scrum using TFS.   Technorati Tags: Scrum,SSW Rules,TFS 2010

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• Free training at Northwest Cadence

  - by Martin Hinshelwood

  Even though I have only been at Northwest Cadence for a short time I have already done so much. What I really wanted to do was let you guys know about a bunch of FREE training that NWC offers. These sessions are at a fantastic time for the UK as 9am PST (Seattle time) is around 5pm GMT. Its a fantastic way to finish off your Fridays and with the lack of love for developers in the UK set to continue I would love some of you guys to get some from the US instead. There are really two offerings. The first is something called Coffee talks that take you through an hours worth of detail in a specific category. Coffee Talks These coffee talks have some superb topics and you can get excellent interaction with the presenter as they are kind of informal. Date Day Time Topic Register Here 01/04/11 Tuesday 8:30AM – 9:30AM PST Real World Business and Technical Benefits of ALM with TFS 2010 150656 01/28/11 Friday 9:00AM - 10:00AM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152810 02/11/11 Friday 9:00AM - 10:00AM PST Visual Source Safe to Team Foundation Server 152844 02/25/11 Friday 2:00PM - 3:00PM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152816 03/11/11 Friday 9:00AM - 10:00AM PST Lab Manager The Ultimate “No More No Repro” Tool 152809 03/25/11 Friday 9:00AM - 10:00AM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152838 04/08/11 Friday 9:00AM - 10:00AM PST Visual Source Safe to Team Foundation Server 152846 04/22/11 Friday 9:00AM - 10:00AM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152839 05/06/11 Friday 2:00PM - 3:00PM PST Real World Business and Technical Benefits of ALM with TFS 2010 150657 05/20/11 Friday 9:00AM - 10:00AM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152842 06/03/11 Friday 9:00AM - 10:00AM PST Visual Source Safe to Team Foundation Server 152847 06/17/11 Friday 9:00AM - 10:00AM PST The Full Testing Experience Professional Quality Assurance with Visual Studio 2010 152843   ALM Training Engagement Program Microsoft has released a new program to bring free Visual Studio 2010 Training Sessions to select customers on Microsoft Visual Studio products and how Application Lifecycle Management (ALM) solutions can help drive greater business impact. For more details on this program, please see the process chart below.  To get started send an email to us; This training is paid for by Microsoft and you would need to commit to 4 sessions in order to get accepted into the program. So these have more hoops to jump through to get them, but the content is much more formal and centres around adoption.

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• Cuda vs OpenCL - opinions

  - by Martin Beckett

  Interested in peoples opinions of Cuda vs openCL following NVidia's Cuda4 release. I had originally gone with openCL since cross platform, open standards are a good thing(tm). I assumed NVidia would fall into line as they had done with openGL. But having talked to some NVidia people, they (naturaly) claim that they will concentrate on CUDA and openCL is hampered by having committees and having to please everyone - like openGL. And with the new tools and libs in CUDA it's hard to argue with that. -I'm in a fairly technical market so I can require the users to have particular HW.

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• Privacy Protection in Oracle IRM 11g

  - by martin.abrahams

  Another innovation in Oracle IRM 11g is an in-built privacy policy challenge. By design, one of the many things that Oracle IRM does, of course, is collect audit information about how and where sealed documents are being used - user names, machine identifiers and so on. Many customers consider that this has privacy implications that the user should be invited to accept as a condition of service use - for the protection of both of the user and the service from avoidable controversy. So, in 11g IRM, when a new user connects to a server for the first time, they can expect to see the following privacy policy dialog. The dialog provides a configurable URL that the customer can use to publish the privacy policy for their IRM service. The policy might clarify what data is being collected and stored, what use that data might be put to, and so on as required by the service owner's legal advisers. In previous releases, you could construct an equivalent capability, and some customers did, but this innovation makes it much easier to do - you simply write a privacy policy and publish it as a web page for which the dialog automatically provides a link. This is another example of how Oracle IRM anticipates not just the security requirements of a customer, but also the broader requirements of service provisioning.

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• Adventures in Scrum: Lesson 1 &ndash; The failed Sprint

  - by Martin Hinshelwood

  I recently had a conversation with a product owner that wanted to have the Scrum team broken up into smaller units so that less time was wasted on the Scrum Ceremonies! Their complaint was around the need in Scrum to have the entire “Team” (7+-2) involved in the sizing of the work during the “Sprint Planning Meeting”.  The standard flippant answer of all Scrum professionals, “Well that's not Scrum”, does not get you any brownie points in these situations. The response could be “Well we are not doing Scrum then” which in turn leads to “We are doing Scrum…But, we have split the scrum team into units of 2/3 so that they can concentrate on a specific area of work”. While this may work, it is not Scrum and should not be called so… It is just a form of Agile. Don’t get me wrong at this stage, there is nothing wrong with Agile, just don’t call it Scrum. The reason that the Product Owner wants to do this is that, in effect, through a number of miscommunications and failings in our implementation of Scrum, there was NO unit of potentially Shippable software at the end of the first sprint. It does not matter to them that most Scrum teams will fail the first Sprint, even those that are high performing teams. Remember it is the product owners their money! We should NOT break up scrum teams into smaller units for the purpose of having less people tied up in the Scrum Ceremonies. The amount of backlog the Team selects is solely up to the Team… Only the Team can assess what it can accomplish over the upcoming Sprint. - Scrum Guide, Scrum.org The entire team must accept the work and in order to understand what they can accept they must be free to size it as a team. This both encourages common understanding and increases visibility on why team members think a task is of a particular size. This has the benefit of increasing the knowledge of the entire team in the problem domain. A new Team often first realizes that it will either sink or swim as a Team, not individually, in this meeting. The Team realizes that it must rely on itself. As it realizes this, it starts to self-organize to take on the characteristics and behaviour of a real Team. - Scrum Guide, Scrum.org This paragraph goes to the why of having the whole team at the meeting; The goal of Scrum it to produce a unit of potentially shippable software at the end of every Sprint. In order to achieve this we need high performing teams and this is what Scrum as a framework has been optimised to produce. I think that our Product Owner is understandably upset over loosing two weeks work and is losing sight the end goal of Scrum in the failures of the moment. As the man spending the money, I completely understand his perspective and I think that we should not have started Scrum on an internal project, but selected a customer  that is open to the ideas and complications of Scrum. So, what should we have NOT done on our first Scrum project: Should not have had 3 interns as the only on site resource – This lead to bad practices as the experienced guys were not there helping and correcting as they usually would. Should not have had the only experienced guys offsite – With both the experienced technical guys in completely different time zones it was difficult to get time for questions. Helping the guys on site was just plain impossible. Should not have used a part time ScrumMaster – Although the ScrumMaster attended all of the Ceremonies, because they are only in 2 full days of the week it makes it difficult for the team to raise impediments as they go. Should not have used a proxy product owner. – This was probably the worst decision that was made. Mainly because the proxy product owner did not have the same vision as the product owner. While Scrum does not explicitly reject the idea of a Proxy Product Owner, I do not think it works very well in practice. The “single wringable neck” needs to contain both the Money and the Vision as well as attending the required meetings. I will be brining all of these things up at the Sprint Retrospective and we will learn from our mistakes and move on. Do, Inspect then Adapt…   Technorati Tags: Scrum,Sprint Planing,Sprint Retrospective,Scrum.org,Scrum Guide,Scrum Ceremonies,Scrummaster,Product Owner Need Help? Professional Scrum Developer Training SSW has six Professional Scrum Developer Trainers who specialise in training your developers in implementing Scrum with Microsoft's Visual Studio ALM tools.

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• Programa Talleres FMW Junio 2010

  - by [email protected]

    PROGRAMA TALLERES FMW Junio 2010 Enterprise 2.0 TALLER FECHA LOCALIZACIÓN Gestion de Contenidos Web y Portales (UCM + WC Suite) 08/06/10 Madrid Digitalización (IPM) 09/06/10 Madrid Service Oriented Architecture (SOA) TALLER FECHA LOCALIZACIÓN Automatización de Procesos de Negocio con Oracle BPM 01/06/10 Madrid Oracle WebLogic 17/06/10 Madrid Inscribirse:

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• Extensible Metadata in Oracle IRM 11g

  - by martin.abrahams

  Another significant change in Oracle IRM 11g is that we now use XML to create the tamperproof header for each sealed document. This article explains what this means, and what benefit it offers. So, every sealed file has a metadata header that contains information about the document - its classification, its format, the user who sealed it, the name and URL of the IRM Server, and much more. The IRM Desktop and other IRM applications use this information to formulate the request for rights, as well as to enhance the user experience by exposing some of the metadata in the user interface. For example, in Windows explorer you can see some metadata exposed as properties of a sealed file and in the mouse-over tooltip. The following image shows 10g and 11g metadata side by side. As you can see, the 11g metadata is written as XML as opposed to the simple delimited text format used in 10g. So why does this matter? The key benefit of using XML is that it creates the opportunity for sealing applications to use custom metadata. This in turn creates the opportunity for custom classification models to be defined and enforced. Out of the box, the solution uses the context classification model, in which two particular pieces of metadata form the basis of rights evaluation - the context name and the document's item code. But a custom sealing application could use some other model entirely, enabling rights decisions to be evaluated on some other basis. The integration with Oracle Beehive is a great example of this. When a user adds a document to a Beehive workspace, that document can be automatically sealed with metadata that represents the Beehive security model rather than the context model. As a consequence, IRM can enforce the Beehive security model precisely and all rights configuration can actually be managed through the Beehive UI rather than the IRM UI. In this scenario, IRM simply supports the Beehive application, seamlessly extending Beehive security to all copies of workspace documents without any additional administration. Finally, I mentioned that the metadata header is tamperproof. This is obviously to stop a rogue user modifying the metadata with a view to gaining unauthorised access - reclassifying a board document to a less sensitive classifcation, for example. To prevent this, the header is digitally signed and can only be manipulated by a suitably authorised sealing application.

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