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  • First look at the cloud with Google App Engine and Udacity

    - by Ken Hortsch
    Udacity is free online university and offers a CS253 intro to web development class.  Since I am currently a web developer/architect in ASP.Net (and recent project has brought me back to Java) it is a bit light.  However, it does offer me a nice problem set and my first exposure to writing cloud apps with GAE and Google Datastore. Steve Huffman, who developed reddit, is the instructor and does offer nice real-life stories.  Give it a look.

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  • Fix: WCF - The type provided as the Service attribute value in the ServiceHost directive could not

    - by Ken Cox [MVP]
    I wanted to expose some raw data to users in my current ASP.NET 3.5 web site project. I created a subdirectory called ‘datafeeds’ and added a WCF Data Service. I wired the dataservice up to the Entity Framework class and, on running the ItemDataService.svc file, was greeted with: The type  <> provided as the Service attribute value in the ServiceHost directive could not be found So why couldn’t it find the class? It was right there in the… oops! Instead of putting the ItemDataService.vb...(read more)

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  • Extracting the Date from a DateTime in Entity Framework 4 and LINQ

    - by Ken Cox [MVP]
    In my current ASP.NET 4 project, I’m displaying dates in a GridDateTimeColumn of Telerik’s ASP.NET Radgrid control. I don’t care about the time stuff, so my DataFormatString shows only the date bits: <telerik:GridDateTimeColumn FilterControlWidth="100px"   DataField="DateCreated" HeaderText="Created"    SortExpression="DateCreated" ReadOnly="True"    UniqueName="DateCreated" PickerType="DatePicker"    DataFormatString="{0:dd MMM yy}"> My problem was that I couldn’t get the built-in column filtering (it uses Telerik’s DatePicker control) to behave.  The DatePicker assumes that the time is 00:00:00 but the data would have times like 09:22:21. So, when you select a date and apply the EqualTo filter, you get no results. You would get results if all the time portions were 00:00:00. In essence, I wanted my Entity Framework query to give the DatePicker what it wanted… a Date without the Time portion. Fortunately, EF4 provides the TruncateTime  function. After you include Imports System.Data.Objects.EntityFunctions You’ll find that your EF queries will accept the TruncateTime function. Here’s my routine: Protected Sub RadGrid1_NeedDataSource _     (ByVal source As Object, _      ByVal e As Telerik.Web.UI.GridNeedDataSourceEventArgs) _     Handles RadGrid1.NeedDataSource     Dim ent As New OfficeBookDBEntities1     Dim TopBOMs = From t In ent.TopBom, i In ent.Items _                   Where t.BusActivityID = busActivityID _       And i.BusActivityID And t.ItemID = i.RecordID _       Order By t.DateUpdated Descending _       Select New With {.TopBomID = t.TopBomID, .ItemID = t.ItemID, _                        .PartNumber = i.PartNumber, _                        .Description = i.Description, .Notes = t.Notes, _                        .DateCreated = TruncateTime(t.DateCreated), _                        .DateUpdated = TruncateTime(t.DateUpdated)}     RadGrid1.DataSource = TopBOMs End Sub Now when I select March 14, 2011 on the DatePicker, the filter doesn’t stumble on time values that don’t make sense. Full Disclosure: Telerik gives me (and other developer MVPs) free copies of their suite.

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  • ASP.NET/IIS Fix: The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine.

    - by Ken Cox [MVP]
    In my latest ASP.NET project, I refresh the sample data using an Excel spreadsheet from the client. After upgrading to Windows Server 2008 R2, I suddenly discovered this error: The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine. The error message is totally bogus! The problem is that I’m running IIS on a 64-bit machine and the ol’ OLEDB thingy just isn’t up with the times. To fix it, go into the IIS Manager and find out which Application Pool the site is using. In my case...(read more)

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  • Fix: Azure Disabled over 49 cents? Beware of using a Java Virtual Machine on Microsoft Azure

    - by Ken Cox [MVP]
    I love my MSDN Azure account. I can spin up a demo/dev app or VM in seconds. In fact, it is so easy to create a virtual machine that Azure shut down my whole account! Last night I spun up a Java Virtual Machine to play with some Android stuff. My mistake was that I didn’t read the Virtual Machine pricing warning: “I have a MSDN Azure Benefit subscription. Can I use my monthly Azure credits to purchase Oracle software?” “No, Azure credits in our MSDN offers are not applicable to Oracle software. In order to purchase Oracle software in the MSDN Azure Benefit subscription, customers need to turn off their {0} spending limit and pay at the regular pay-as-you-go rate. Otherwise, Oracle usage will hit the {1} spending limit and the subscription will be immediately disabled.”  Immediately disabled? Yup. Everything connected to the subscription was shut off, deallocated, rendered useless - even the free Web sites and the free Sendgrid email service.  The fix? I had to remove the spending limit from my account so I could pay $0.49 (49 cents) for the JVM usage. I still had $134.10 in credits remaining for regular usage with 6 days left in the billing month.  Now the restoration/clean-up begins… figuring out how to get the web sites and services back online.  To me, the preferable way would be for Azure to warn me when setting up a JVM that I had no way of paying for the service. In the alternative, shut down just the offending services – the ones that can’t be covered by the regular credits. What a mess.

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  • EF 4 Pluralization Update

    - by Ken Cox [MVP]
    I previously wrote about playing with EF 4’s PluralizationService class . Now that OrcsWeb is running ASP.NET 4, you can play with my little pluralization page and its WCF service online. The source code (such as it is!) can be downloaded from the MSDN Code Gallery here: http://code.msdn.microsoft.com/PluralizationService BTW, one annoyance is that the WDSL still includes the default namespace:  namespace="http://tempuri.org/" I swatted a couple of these instances, but if you know...(read more)

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  • Operation MVC

    - by Ken Lovely, MCSE, MCDBA, MCTS
    It was time to create a new site. I figured VS 2010 is out so I should write it using MVC and Entity Framework. I have been very happy with MVC. My boss has had me making an administration web site in MVC2 but using 2008. I think one of the greatest features of MVC is you get to work with root of the app. It is kind of like being an iron worker; you get to work with the metal, mold it from scratch. Getting my articles out of my database and onto web pages was by far easier with MVC than it was with regular ASP.NET. This code is what I use to post the article to that page. It's pretty straightforward. The link in the menu is passes the id which is simply the url to the page. It looks for that url in the database and returns the rest of the article.   DataResults dr = new DataResults(); string title = string.Empty; string article = string.Empty; foreach (var D in dr.ReturnArticle(ViewData["PageName"].ToString())) { title = D.Title; article = D.Article; } public   List<CurrentArticle> ReturnArticle(string id) { var resultlist = new List<CurrentArticle>(); DBDataContext context = new DBDataContext(); var results = from D in context.MyContents where D.MVCURL.Contains(id) select D;foreach (var result in results) { CurrentArticle ca = new CurrentArticle(); ca.Title = result.Title; ca.Article = result.Article; ca.Summary = result.Summary; resultlist.Add(ca); } return resultlist;}

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  • Why Your ERP System Isn't Ready for the Next Evolution of the Enterprise

    - by ken.pulverman
      ERP has been the backbone of enterprise software.  The data held in your ERP system is core of most companies.  Efficiencies gained through the accounting and resource allocation through ERP software have literally saved companies trillions of dollars. Not only does everything seem to be fine with your ERP system, you haven't had to touch it in years.  Why aren't you ready for what comes next? Well judging by the growth rates in the space (Oracle posted only a 3% growth rate, while SAP showed a 12% decline) there hasn't been much modernization going on, just a little replacement activity. If you are like most companies, your ERP system is connected to a proprietary middleware solution that only effectively talks with a handful of other systems you might have acquired from the same vendor.   Connecting your legacy system through proprietary middleware is expensive and brittle and if you are like most companies, you were only willing to pay an SI so much before you said "enough."  So your ERP is working.  It's humming along.  You might not be able to get Order to Promise information when you take orders in your call center, but there are work arounds that work just fine. So what's the problem? The problem is that you built your business around your ERP core, and now there is such pressure to innovate your business processes to keep up that you need a whole new slew of modern apps and you need ERP data to be accessible from everywhere.   Every time you change a sales territory or a comp plan or change a benefits provider your ERP system, literally the economic brain of your business, needs to know what's going on.  And this giant need to access and provide information to your ERP is only growing. What makes matters even more challenging is that apps today come in every flavor under the Sun™.   SaaS, cloud, managed, hybrid, outsourced, composite....and they all have different integration protocols. The only easy way to get ahead of all this is to modernize the way you connect and run your applications.  Unlike the middleware solutions of yesteryear, modern middleware is effectively the operating system of the enterprise.  In the same way that you rely on Apple, Microsoft, and Google to find a video driver for your 23" monitor or to ensure the Word or Keynote runs, modern middleware takes care of intra-application connectivity and process execution.  It effectively allows you to take ERP out of the middle while ensuring connectivity to your vital data for anything you want to do.  The diagram below reflects that change.    In this model, the hegemony of ERP is over.  It too has to become a stealthy modern app to help you quickly adapt to business changes while managing vital information.  And through modern middleware it will connect to everything.  So yes ERP as we've know it is dead, but long live ERP as a connected application member of the modern enterprise. I want to Thank Andrew Zoldan, Group Vice President Oracle Manufacturing Industries Business Unit for introducing me to how some of his biggest customers have benefited by modernizing their applications infrastructure and making ERP a connected application. by John Burke, Group Vice President, Applications Business Unit

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  • mount another drive to the same directory

    - by Ken Autotron
    I recently purchased a server that was advertised as 2TB (2 1TB drives) in size, when I use it it reports only one of the drives, I would like to be able to use both as if one drive. here is the specs... sudo lshw -C disk *-disk description: ATA Disk product: TOSHIBA DT01ACA1 vendor: Toshiba physical id: 0.0.0 bus info: scsi@1:0.0.0 logical name: /dev/sda version: MS2O serial: 13EJ81XPS size: 931GiB (1TB) capabilities: partitioned partitioned:dos configuration: ansiversion=5 signature=0005b3dd *-disk description: ATA Disk product: TOSHIBA DT01ACA1 vendor: Toshiba physical id: 0.0.0 bus info: scsi@4:0.0.0 logical name: /dev/sdb version: MS2O serial: 13OX3TKPS size: 931GiB (1TB) capabilities: partitioned partitioned:dos configuration: ansiversion=5 signature=00030e86 and fdisk -l Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00030e86 Device Boot Start End Blocks Id System /dev/sdb1 * 4096 41947135 20971520 fd Linux raid autodetect /dev/sdb2 41947136 1952468991 955260928 fd Linux raid autodetect /dev/sdb3 1952468992 1953519615 525312 82 Linux swap / Solaris Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x0005b3dd Device Boot Start End Blocks Id System /dev/sda1 * 4096 41947135 20971520 fd Linux raid autodetect /dev/sda2 41947136 1952468991 955260928 fd Linux raid autodetect /dev/sda3 1952468992 1953519615 525312 82 Linux swap / Solaris Disk /dev/md2: 978.2 GB, 978187124736 bytes 2 heads, 4 sectors/track, 238815216 cylinders, total 1910521728 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/md2 doesn't contain a valid partition table Disk /dev/md1: 21.5 GB, 21474770944 bytes 2 heads, 4 sectors/track, 5242864 cylinders, total 41942912 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/md1 doesn't contain a valid partition table is it possible to mount both drives to say /Home/ so I would have 2TB of usable space?

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  • Not Happy With the Monochrome Visual Studio 11 Beta UI

    - by Ken Cox [MVP]
    I can’t wait for a third-party to come out with tools to return some colour to the flat, monochrome look of Visual Studio 11 (beta). What bugs me most are the icons. I feel like a newbie when I have to squint and analyze the shape of icons on the debugging toolbar just to get the one I want. (Fortunately, the meddlers didn’t mess with the keyboard commands so I’m not totally lost.) Not sure what usability studies told MS that bland is better. Maybe it is for most people, but not for me.  Gray, shades of gray and black. Ugh. And don’t get me started on the stupidity of using all-caps for window titles. Who approved that? I see that there’s a UserVoice poll on the topic (http://visualstudio.uservoice.com/forums/121579-visual-studio/suggestions/2623017-add-some-color-to-visual-studio-11-beta) but I doubt that anything will change Microsoft’s opinion in time for the release. Once a product gets to a stable beta, most non-crashing stuff gets pushed to the next version. I hope I’m proved wrong. Fortunately, Visual Studio is quite customizable. Unless ‘Bland’ is hard-coded, some registry tweaks and a collection of replacement icons should allow dissenters like me back to productivity. BTW, other than hating the UI, VS 11 beta is working quite well for me on a .NET 4 project.Note: Although my username for the ASP.NET domain includes the letters "[MVP]", I'm no longer an MVP. Apparently it's nearly impossible to change a username in the system. My apologies for the misleading identifier but I tried to have it changed without success.

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  • The Importance of Using !important in CSS Styles

    - by Ken Cox [MVP]
    I just lost time trying to hide a CSS border in a third-party control, so it’s worth a quick post to help others avoid similar frustration. I could plainly see in the Internet Explorer 8 developer tool that an unwanted border in the Telerik RadRotator   was coming from the style classes named .RadRotator_Web20 and .rrClipRegion. So, to remove the border, I inserted my own style in the page as an override: .RadRotator_Web20 .rrClipRegion {     border: 0px; } No change! WTF??? Okay...(read more)

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  • Repairing The Visual Studio 2012 UI

    - by Ken Cox [MVP]
    I have sympathy for ‘Softies who don’t like the controversial ‘Metro’ UI changes but are afraid to say so. After all, who wants to commit a CLM (Career-Limiting Move) by declaring that the Emperor has no clothes (or gradients) and that ALL CAPS IN MENUS ARE DUMB? Talk about power! Here’s a higher-up (anyone got a name?) who has enforced a flat, monochrome, uninteresting user interface in Visual Studio 2012  that has been damned with faint praise by consumers. The pushback must have been enormous. Some ‘Softies disengage from the raging debate with, “It’s not my decision” while others feebly point out that the addition of some colour pixels in the icons is a real improvement over the beta version. True, I guess. With the UI pretty much locked, its down to repairing the damage. Fortunately, some Empire dissident has leaked the news to a blogger that  those SHOUTING CAPs aren’t hardcoded afterall: How To Prevent Visual Studio 2012 ALL CAPS Menus And so it goes. By RTM, I’m sure there will be many more add-ons to help us ‘de-Metro’ VS 2012 and recreate our favourite Visual Studio 2010 themes for it.

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  • Microsoft Sponsored - Give Camp

    - by Ken Lovely, MCSE, MCDBA, MCTS
    Are you ready to connect with the local tech community for a good cause? GiveCamp needs your support. For one weekend in June, we’ll take on the technology wish lists of 20 non-profit organizations, and we’re looking for about 100 volunteers, both technical and non-technical, to help us do it. A typical GiveCamp draws 75 to 100 volunteers. Individuals can work with their colleagues in company teams, or they can opt to be matched with fellow volunteers who have complementary skill sets. Everyone is welcome to head home for the evenings – but there are always the diehards who work from Friday kickoff straight through Sunday afternoon. Food and drinks, especially of the caffeinated variety, are provided, along with game systems for breaks. Technical volunteers We're looking for graphic or UX designers, developers with .NET/Java/LAMP/Open Source/CMS experience, project managers, system/network administrators, DBAs, and non-profit technical consultants and web strategists. Non-technical volunteers Beyond the technology, there are many other aspects that make GiveCamp a success. We need non-technical volunteers to run errands, help with setting up and cleaning up, and everything in between. Whether you can offer a couple hours of your time or join GiveCamp for a couple days, your support is needed Sign up at; http://www.eventbrite.com/event/650615007 Feel free to contact me or Dani Diaz of Microsoft for more information

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  • Tell Visual Studio 2012 UI Designers What to Fix

    - by Ken Cox [MVP]
    If you hate the default interface themes in Visual Studio 2012 as much as I do, you have another outlet to vent. The UI designers have posted a survey where you can tell them how distracting and annoying you find the gray themes and black icons. You even get to comment on the (fixable) all-caps issue. The UI people didn’t listen much to the (largely hostile) developer feedback during the product design – or more likely were constrained by some edict from on high - but seem more willing now to create decent themes for updates. Here’s the Visual Studio 2012 Visual Theme survey URL https://illumeweb.smdisp.net/collector/Survey.ashx?Name=VS2012ThemeSurvey VS 2012 is a great product hampered by a lousy UI. If I could have a Visual Studio 2010 theme (with its coloured icons) I’d be more than satisfied with the 2012 release.

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  • Free Team Foundation Service a Boon for Play Projects

    - by Ken Cox [MVP]
    My ‘jump in and sink or swim’ learning style leads me to create dozens of unbillable ‘play’ projects in Visual Studio 2012.  For example, I’m currently learning to customize the powerful auction/fixed price/classifieds software called AuctionWorx Enterprise.  I make stupid mistakes as I grasp a new API and configure projects. It’s frustrating to go down a rat hole and discover the VS IDE’s Undo doesn’t reach back to a working build from the previous weekend. Enter Visual Studio’s Free Team Foundation Service.  Put your play projects into the free source control and check in (or shelve) a snapshot before embarking on something risky. (I already use Discount ASP.NET’s Team Foundation Server hosting for client projects so there’s zero TFS/VS learning curve for me and first class GUI support.) TFS is free right now for teams of five or fewer. I’m not naive enough to expect ‘free’ to last forever. So, it’ll be interesting to see how much Microsoft intends to charge in 2013 for TFS. In the meantime, why not grab some free source code storage? BTW, it’s weird to realize that Microsoft is backing up my junky little playtime code on three physically-distinct servers every day - and taking incremental backups every hour.

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  • RealTek RTL8188CE WiFi adapter doesn't connect reliably

    - by ken.ganong
    I recently bought a new system76 laptop which came pre-installed with Ubuntu 11.10. I've been having trouble with my wireless connectivity. It seems that my connection with my wireless network keeps going in and out. It is not my network--I have seen the same problem on multiple WiFi networks and at different distances and reported link qualities. OS version: Ubuntu 11.10 oneiric kernel version: 3.0.0-14-generic lspci: lspci -nnk | grep -iA2 net 04:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01) Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:9196] Kernel driver in use: rtl8192ce -- 05:00.0 Ethernet controller [0200]: JMicron Technology Corp. JMC250 PCI Express Gigabit Ethernet Controller [197b:0250] (rev 05) Subsystem: CLEVO/KAPOK Computer Device [1558:2500] Kernel driver in use: jme iwconfig: iwconfig lo no wireless extensions. eth0 no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"peppermintpatty" Mode:Managed Frequency:2.462 GHz Access Point: 98:FC:11:6C:E0:22 Bit Rate=72.2 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr=2347 B Fragment thr:off Power Management:off Link Quality=49/70 Signal level=-61 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:1103 Missed beacon:0 lshw: sudo lshw -class network *-network description: Wireless interface product: RTL8188CE 802.11b/g/n WiFi Adapter vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:04:00.0 logical name: wlan0 version: 01 serial: 00:1c:7b:a1:95:04 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=rtl8192ce driverversion=3.0.0-14-generic firmware=N/A ip=192.168.1.106 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn resources: irq:18 ioport:e000(size=256) memory:f7d00000-f7d03fff *-network description: Ethernet interface product: JMC250 PCI Express Gigabit Ethernet Controller vendor: JMicron Technology Corp. physical id: 0 bus info: pci@0000:05:00.0 logical name: eth0 version: 05 serial: 00:90:f5:c0:42:b3 size: 10Mbit/s capacity: 1Gbit/s width: 32 bits clock: 33MHz capabilities: pm pciexpress msix msi bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=jme driverversion=1.0.8 duplex=half latency=0 link=no multicast=yes port=MII speed=10Mbit/s resources: irq:56 memory:f7c20000-f7c23fff ioport:d100(size=128) ioport:d000(size=256) memory:f7c10000-f7c1ffff memory:f7c00000-f7c0ffff Any help would be appreciated. The last time I've dealt with wireless issues, the most given solution was NDIS wrapper and I seem sorely out-of-date.

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  • MIX10 Big Announcements Speculation

    - by Ken Cox [MVP]
    What’s your speculation on the big announcements to come from MIX10 ? A date for VS 2010 availability on MSDN? A release candidate for Silverlight 4 on the desktop? An SDK for Silverlight on Windows Mobile 7? A CTP of Internet Explorer 9? Something (anything!) new on Windows Live ID development? More JQuery in ASP.NET? Alas, the vast majority of .NET developers (me included) can’t attend the MIX conference again this year. Fortunately, Channel 9 is putting much of the important content online . They...(read more)

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  • Best way to cache apt downloads on a LAN?

    - by Ken Simon
    I have multiple Ubuntu machines at home and a pretty slow internet connection, and sometimes multiple machines need to be updated at once (especially during new Ubuntu releases.) Is there a way where only one of my machines needs to download the packages, and the other machines can use the first machine to get the debs? Does it involve setting up my own local mirror? Or a proxy server? Or can it be made simpler?

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  • Why do programmers write applications and then make them free?

    - by Ken
    As an entrepreneur/programmer who makes a good living from writing and selling software, I'm dumbfounded as to why developers write applications and then put them up on the Internet for free. You've found yourself in one of the most lucrative fields in the world. A business with 99% profit margin, where you have no physical product but can name your price; a business where you can ship a buggy product and the customer will still buy it. Occasionally some of our software will get a free competitor, and I think, this guy is crazy. He could be making a good living off of this but instead chose to make it free. Do you not like giant piles of money? Are you not confident that people would pay for it? Are you afraid of having to support it? It's bad for the business of programming because now customers expect to be able to find a free solution to every problem. (I see tweets like "is there any good FREE software for XYZ? or do I need to pay $20 for that".) It's also bad for customers because the free solutions eventually break (because of a new OS or what have you) and since it's free, the developer has no reason to fix it. Customers end up with free but stale software that no longer works and never gets updated. Customer cries. Developer still working day job cries in their cubical. What gives? PS: I'm not looking to start an open-source/software should be free kind of debate. I'm talking about when developers make a closed source application and make it free.

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  • How can I generate a view or projection matrix for OpenGL 3.+

    - by Ken
    I'm transitioning from OpenGL 2 to OpenGL 3.+ and to GLSL 1.5. I'm trying to avoid using the deprecated features. My question how do we now generate the view or projection matrix. I was using the matrix stack to calculate the projection matrix for me; GLfloat ptr[16]; gluPerspective(...); glGetFloatv(GL_MODELVIEW_MATRIX, ptr); //then pass ptr via a uniform to the shader But obviously the matrix stack is deprecated. So this approach is not the best an option going forward. I have the 'Red Book', 7th ed, which covers 3.0 & 3.1 and it still uses the deprecated matrix functions in it's examples. I could write some utility-code myself to generate the matrices. But I don't want to re-invent this particular wheel, especially when this functionality is required for every 3D graphics program. What is the accepted way to generate world,view & projection matrices for OpenGL? Is there an emerging 'standard' library for this? Or is there some other hidden (to me) functionality in OpenGL/GLSL which I have overlooked?

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  • The death of Kodak digital

    - by Ken Hortsch
    Months ago Kodak announced that it was discontinuing its digital video to focus on “significant opportunities for profitable growth”.  Three years ago I picked up the little Kodak Zi6 (pronounced Zix) for the kids for Christmas.  It is an HD pocket video camera with a nice 3” LCD all built into a something a bit longer than an deck of cards.  It is low tech and great!  The kids have had a ball with it, and for around $100 it was perfect.  It comes with 2 AA rechargeable batteries and the recharger.  You can add an SD card, but don’t need to, and the USB is not a cable but a pop-out dongle so everything is right in the one package.  Too many companies look for the next big thing and fail to see the stuff that is good enough, and right in front of their eyes.

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  • Loops, Recursion and Memoization in JavaScript

    - by Ken Dason
    Originally posted on: http://geekswithblogs.net/kdason/archive/2013/07/25/loops-recursion-and-memoization-in-javascript.aspxAccording to Wikipedia, the factorial of a positive integer n (denoted by n!) is the product of all positive integers less than or equal to n. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120. The value of 0! is 1. We can use factorials to demonstrate iterative loops and recursive functions in JavaScript.  Here is a function that computes the factorial using a for loop: Output: Time Taken: 51 ms Here is the factorial function coded to be called recursively: Output: Time Taken: 165 ms We can speed up the recursive function with the use of memoization.  Hence,  if the value has previously been computed, it is simply returned and the recursive call ends. Output: Time Taken: 17 ms

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  • Value Not Updating? Check for Caching!

    - by Ken Cox [MVP]
    Here’s today’s dumb mistake: A value that was supposedly updated by a routine on one page, wasn’t changing on another ASP.NET screen. I carefully traced the progress of the update and everything looked right – all the way to the database. After puzzling over why the value wouldn’t show correctly on the ASP.NET grid, it finally dawned on me: <%@ OutputCache Duration="30" VaryByParam="none" %> Ouch! To improve efficiency, I had told the page to cache the output for 30 seconds...(read more)

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