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  • POP Forums will be at Mix!

    - by Jeff
    If you've never been to Mix, you're missing out on what is arguably one of the best conferences that Microsoft does. I'm not just saying that because I work here... I felt that way before, having been to most of them. The breadth of people and disciplines make it a really exciting event that pushes it well beyond the "Redmond bubble," as I like to call it. You should go.In any case, there's an Open Source Fest happening the night before Mix starts, on Monday, from 6 to 9 p.m. There will be people there representing a ton of great projects, some as enormous as Umbraco, as well as people doing SDK's, controls and other neat stuff. Best of all, you get to vote for your favorites. Unless your favorite is Orchard, because Microsoft is sponsoring that directly. Or if it's POP Forums, not because Microsoft is sponsoring it, but because that's where I work in my day job. No prizes for me! Come by and say hello. I think the app will be nearly final by then, and it's already running on MouseZoom, one of my little side projects.The quality and diversity of open source projects around the Microsoft stack just keeps getting better. Our platform is also pretty great at running stuff we don't make. This will be a pretty exciting Mix. Can't wait!

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  • Static "LoD" hack opinions

    - by David Lively
    I've been playing with implementing dynamic level of detail for rendering a very large mesh in XNA. It occurred to me that (duh) the whole point of this is to generate small triangles close to the camera, and larger ones far away. Given that, rather than constantly modifying or swapping index buffers based on a feature's rendered size or distance from the camera, it would be a lot easier (and potentially quite a bit faster), to render a single "fan" or flat wedge/frustum-shaped planar mesh that is tessellated into small triangles close to the near or small end of the frustum and larger ones at the far end, sort of like this (overhead view) (Pardon the gap in the middle - I drew one side and mirrored it) The triangle sizes are chosen so that all are approximately the same size when projected. Then, that mesh would be transformed to track the camera so that the Z axis (center vertical in this image) is always aligned with the view direction projected into the XZ plane. The vertex shader would then read terrain heights from a height texture and adjust the Y coordinate of the mesh to match a height field that defines the terrain. This eliminates the need for culling (since the mesh is generated to match the viewport dimensions) and the need to modify the index and/or vertex buffers when drawing the terrain. Obviously this doesn't address terrain with overhangs, etc, but that could be handled to a certain extent by including a second mesh that defines a sort of "ceiling" via a different texture. The other LoD schemes I've seen aren't particularly difficult to implement and, in some cases, are a lot more flexible, but this seemed like a decent quick-and-dirty way to handle height map-based terrain without getting into geometry manipulation. Has anyone tried this? Opinions?

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  • Novice prototyping a massive multiplayer webpage based gaming system

    - by Sean Hendlin
    I'm trying to build a website based game in which various pages of the site act as different areas of the game. I am wondering what you would recommended as a design structure. Which languages would be best if building what will hopefully becomes a massive system able to scale to massive amounts of users. I am wondering if and how various elements from differing languages could be meshed to interact with each other. For example could I use html5, javascript, and PHP? What about asp.net how might that factor in? I'm a newbie programmer but I've been working on this idea for years and I want to build it to reality. Your comments and suggestions are appreciated. P.S.: The game is not all graphics and animation (though flash like appearance and some animation would be nice). What I am thinking of is essentially a heavily gamified system of forms. And LOTS of data in many different categories cross referencing each-other. I'm not sure how to go about structuring the collection of data. Also while I know javascript can be used to process some functions, I'm wondering what sort of base system I would need to handle the server side processing of what I am expecting to be some pretty significant algorithm processing. That is to say I expect to have many many many functions and I'm not sure how to mange this using javascript. I feel like they would be forgotten, mixed up, disorganizes as they essentially only exist where they are coded. I guess I need to learn something of libraries? OK, Thank you! Is enough from me for now.

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  • APress Deal of the Day - 1/June/2012 - Introducing Visual C# 2010

    - by TATWORTH
    Today's $10 Deal of the Day from APress at http://www.apress.com/9781430231714 is Introducing Visual C# 2010."If you're new to C# programming, this book is the ideal way to get started. Respected author Adam Freeman guides you through the C# language by carefully building up your knowledge from fundamental concepts to advanced features." Adam Freeman is an excellent author. This is an excellent introduction to C# programming and a manual for those with experience. Having read through book, I am very impressed by its practical approach to C#. I cannot improve on the by-line "Get started on your C# journey with an expert by your side leading by example" Adam Freeman teaches C# by precept and example. I suspect he drives a Volvo C30 as it comes up in many of the code examples! Throughout the book there are numerous links back and forth so as to avoid over complicating the current topic. I have have no hesitation in recommending this book both to programmers starting out with C# and to the seasoned professional. It is a book that should be on every C# development team's book shelf.

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  • How to Get AirVideo Features in Android for Free

    - by Zainul Franciscus
    AirVideo makes it possible for iPhone, iPad, or iPod Touch users to stream any video format on their devices. If you’re an Android user, then you are in luck, because you can get AirVideo’s features for free with VLC-Share. In today’s tutorial, we will start off by giving you an instruction on how to install VLC-Share, followed by configuring firewall and port forwarding, and we complete the tutorial with a walk through of VLC-Share features. Wallpaper available from our Naruto Customization set. Latest Features How-To Geek ETC How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Smart Taskbar Is a Thumb Friendly Android Task Launcher Comix is an Awesome Comics Archive Viewer for Linux Get the MakeUseOf eBook Guide to Speeding Up Windows for Free Need Tech Support? Call the Star Wars Help Desk! [Video Classic] Reclaim Vertical UI Space by Adding a Toolbar to the Left or Right Side of Firefox Androidify Turns You into an Android-style Avatar

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  • Implmenting RLE into a tilemap or how to create a large 3D array?

    - by Smallbro
    Currently I've been using a 3D array for my tiles in a 2D world but the 3D side comes in when moving down into caves and whatnot. Now this is not memory efficient and I switched over to a 2D array and can now have much larger maps. The only issue I'm having now is that it seems that my tiles cannot occupy the same space as a tile on the same z level. My current structure means that each block has its own z variable. This is what it used to look like: map.blockData[x][y][z] = new Block(); however now it works like this map.blockData[x][y] = new Block(z); I'm not sure why but if I decide to use the same space on say the floor below it wont allow me to. Does anyone have any ideas on how I can add a z-axis to my 2D array? I'm using java but I reckon the concept carries across different languages. Edit: As Will posted, RLE sounds like the best method for achieving a fast 3D array. However I'm struggling to understand how I would even start to implement it? Would I create a 4D array the 4th being something which controls how many to skip? Or would the x-axis simply change altogether and have large gaps in between - for example [5][y][z] would skip 5 tiles? Is there something really obvious here which I am missing? The number of z levels I'm trying to have is around 66, it would be preferably that I can have up to or more than 1000 in x and y.

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  • Cannot boot computer, help please :(

    - by Austin
    Ok so here is more descriptions, I REALLY NEED HELP! I installed Ubuntu on a disk (unsure of v. I can't check.. Computer is broke :/ ) I then burned the disk I restarted computer pressed f12 blah blah it came up, I pressed enter for English, I plugged an Ethernet card in for better connection, and then started the installation.... I did the basics, and I entered a host name, and a user name and pass all that, when it came to partition page, I presse enter for no and then it went back to the installation page, I pressed install again, and it brought me back, so I selected yes , it loaded an it asked what software to instal I selected sh ( it was first option and I didn't know which to do ) so after everything finished loading, my disk was ejected the process finish, I run my computer and it opens up in log in page on cmd script I didn't know it, so I ran disk again makin a user and pass to remember.... Going back to login thing I logged in, and all it did was say my username... I didn't know what to do from there, I looked online found nothing but grub stuff, so I went to "Advanced Ubuntu options" and then "(Recovery Mode) and went to update grub... In middle o loading it asked to continue (Y/n) I typed Y and it finished, it went back to the options located in (Recovery Mode) and I closed it, and it loaded... And then showed up in another script screen, saying a paragraph on top, and on left side ( where login: would be located etc. ) it says "Grub" and I don't know what to type, if I turn off computer and turn back on it just goes straight to that again... PLEASE HELP:(

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  • What You Said: Cutting the Cable Cord

    - by Jason Fitzpatrick
    Earlier this week we asked you if you’d cut the cable and switched to alternate media sources to get your movie and TV fix. You responded and we’re back with a What You Said roundup. One of the recurrent themes in reader comments and one, we must admit, we didn’t expect to see with such prevalence, was the number of people who had ditched cable for over-the-air HD broadcasts. Fantasm writes: I have a triple HD antenna array, mounted on an old tv tower, each antenna facing out from a different side of the triangular tower. On tope of the tower are two 20+ year old antennas… I’m 60 miles from toronto and get 35 channels, most in brilliant HD… Anything else, comes from the Internet… Never want cable or sat again… Grant uses a combination of streaming services and, like Fantasm, manages to pull in HD content with a nice antenna setup: We use Netflix, Hulu Plus, Amazon Prime, Crackle, and others on a Roku as well as OTA on a Tivo Premier. The Tivo is simply the best DVR interface I have ever used. The Tivo Netflix application, though, is terrible, and it does not support Amazon Prime. Having both boxes makes it easy to use all of the services. 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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  • How can I make an infinite cave using stage3d?

    - by ifree
    I want to make an infinite cave in my 3d game using flash stage3d. But I got no idea about how to build that cave. Can anyone can give me some solution or hint? update: I've tried agal fragment shader like squeae tunnel in shader toy code: var fragmentProgramCode:String = AGALUtils.build() .mov("ft0","v0") .div("ft1","ft0.xy","fc3.xy") .mul("ft2","fc6.x","ft1") .sub("ft3","ft2","fc5.x")//vec2 p = -1.0 + 2.0 * gl_FragCoord.xy / resolution.xy; .mul("ft1","ft3.x","ft3.x") .mul("ft2","ft3.y","ft3.y") .pow("ft4","ft1","fc6.z")//float r = pow( pow(p.x*p.x,16.0) + pow(p.y*p.y,16.0), 1.0/32.0 ); .pow("ft5","ft2","fc6.z") .add("ft1","ft4","ft5") .pow("ft4","ft1","fc6.w") .mov("ft5","fc5")//uv .sub("ft1","fc7.x","ft4") .add("ft5.x","fc7.x","ft1")//uv.x = .5*time + 0.5/r; .mov("ft6","fc0")//for atan .atan2("ft5.y","ft3.y","ft3.x",new <String>["fc7.y","fc5.x","fc7.z","fc7.w","fc8.x","fc8.y","fc8.z","fc8.w","fc9.x","fc9.y"],"ft6") .tex("ft0","ft5","fs0","repeat","linear","nomip")//tex .mul("ft1","ft4","ft4") .mul("ft2","ft1","ft4")//r*r*r .mul("ft1","ft0.xyz","ft2") .mov("ft0.w","fc5.x") .mov("oc","ft1").toString() it can only apply one material,but my project requires different types of material (like floor,ceilling). so ,I create a 3d model Is there anyway to make that 3d model render like "infinity cave"? use agal to make each side of cave's texture move? thanks for your help

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  • Ubuntu unstable, showing awkward behavior

    - by Christophe De Troyer
    Let me start off by saying that this problem can't be described in such a way that allows me to find other topics, which have some relevance to this problem. That's why I created this question. In case this question might have been asked before, I apologize. So what is the problem: My computer (Intel Core I5 2500K - with HD3000 graphics -, 6 gb DDR, 1 SSD, 3 HDD's and an Asus P8Z68 mobo) runs Windows on the SDD. But I decided to give Ubuntu a chance to be my daily OS for basic needs since it's open source and I find it a handicap of not being able to work with it. I decided to run the windows installer and install Ubuntu 12.04 to my 320 Gb hdd which was not being used in my computer. After installing it and booting it, it worked great! I spent the rest of the day/night using it, and falling for it. Great, today I booted Ubuntu (I had the choice in the bootloader as I expected). It asked me for my login and it started logging in. Now, after a few (literally) minutes of letting it "boot" I tried determining the cause of this. What I've figured out so far: When I left click on my desktop it freezes completely for a few seconds I have something like tearing in the left side menu (in games, you know) when I move my mouse around It runs well when just hovering around with my mouse, but from the point I click on something it freezes. What have I tried? I ran a HD Tune diagnostic on the HDD but the performance seems to be very close to the stock values, so I'm taking it as a good HDD. I'm trying to get to the drivers update panel for Ubuntu, but with the state it's in, it's taking a lot of time.. Could anyone point me in a direction for troubleshooting this? I'm not really a noob at all, just when using Linux.. :) Thanks in advance! Christophe,

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  • Detecting collision between ball (circle) and brick(rectangle)?

    - by James Harrison
    Ok so this is for a small uni project. My lecturer provided me with a framework for a simple brickbreaker game. I am currently trying to overcome to problem of detecting a collision between the two game objects. One object is always the ball and the other objects can either be the bricks or the bat. public Collision hitBy( GameObject obj ) { //obj is the bat or the bricks //the current object is the ball // if ball hits top of object if(topX + width >= obj.topX && topX <= obj.topX + obj.width && topY + height >= obj.topY - 2 && topY + height <= obj.topY){ return Collision.HITY; } //if ball hits left hand side else if(topY + height >= obj.topY && topY <= obj.topY + obj.height && topX + width >= obj.topX -2 && topX + width <= obj.topX){ return Collision.HITX; } else return Collision.NO_HIT; } So far I have a method that is used to detect this collision. The the current obj is a ball and the obj passed into the method is the the bricks. At the moment I have only added statement to check for left and top collisions but do not want to continue as I have a few problems. The ball reacts perfectly if it hits the top of the bricks or bat but when it hits the ball often does not change directing. It seems that it is happening toward the top of the left hand edge but I cannot figure out why. I would like to know if there is another way of approaching this or if people know where I'm going wrong. Lastly the collision.HITX calls another method later on the changes the x direction likewise with y.

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  • Sprite Sheets in PyGame?

    - by Eamonn
    So, I've been doing some googling, and haven't found a good solution to my problem. My problem is that I'm using PyGame, and I want to use a Sprite Sheet for my player. This is all well and good, and it would be too, if I wasn't using a Sprite Sheet strip. Basically, if you don't understand, I have a strip of 32x32 'frames'. These frames are all in an image, along side each other. So, I have 3 frames in 1 image. I'd like to be able to use them as my sprite sheet, and not have to crop them up. I have used an awesome, popular and easy-to-use game framework for Lua called LÖVE. LÖVE has these things called "Quads". They are similar to texture regions in LibGDX, if you know what they are. Basically, quads allow you to get parts of an image. You define how large a quad is, and you define parts of an image that way, or 'regions' of an image. I would like to do something similar to this in PyGame, and use a "for" loop to go through the entire image width and height and mark each 32x32 area (or whatever the user defines as their desired frame width and height) and store that in a list or something for use later on. I'd define an animation speed and stuff, but that's for later on. I've been looking around on the web, and I can't find anything that will do this. I found 1 script on the PyGame website, but it crashed PyGame when I tried to run it. I tried for hours trying to fix it, but no luck. So, is there a way to do this? Is there a way to get regions of an image? Am I going about this the wrong way? Is there a simpler way to do this? Thanks! :-)

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  • Another guvcview issue? Core dump!

    - by user290498
    guvcview is core dumping with my Sony Handycam plugged in. It works fine with my standard Logitech Webcam. I deleted the config file so it could re-create it. here is the output: $ guvcview guvcview 1.5.3 Could not open /home/rayj/.guvcviewrc for read, will try to create it write /home/rayj/.guvcviewrc OK ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib pcm_dmix.c:957:(snd_pcm_dmix_open) The dmix plugin supports only playback stream Cannot connect to server socket err = No such file or directory Cannot connect to server socket jack server is not running or cannot be started video device: /dev/video0 ERROR opening V4L2 interface for /dev/video1 Init. stk1160 (location: usb-0000:00:1d.0-1.5) { pixelformat = 'UYVY', description = '16 bpp YUY2, 4:2:2, packed' } VIDIOC_ENUM_FRAMESIZES - Error enumerating frame sizes: Inappropriate ioctl for device Unable to enumerate frame sizes. : Inappropriate ioctl for device { pixelformat = 'RGB3', description = 'RGB3' } { ?GSPCA? : width = 720, height = 480 } fmtind:2 fsizeind: 1 { pixelformat = 'BGR3', description = 'BGR3' } { ?GSPCA? : width = 720, height = 480 } fmtind:3 fsizeind: 1 { pixelformat = 'YU12', description = 'YU12' } { ?GSPCA? : width = 720, height = 480 } fmtind:4 fsizeind: 1 { pixelformat = 'YV12', description = 'YV12' } { ?GSPCA? : width = 720, height = 480 } fmtind:5 fsizeind: 1 vid:05e1 pid:0408 driver:stk1160 checking format: 1196444237 Format unavailable: 1196444237. Init v4L2 failed !! Init video returned -2 trying minimum setup ... Segmentation fault (core dumped)

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  • Announcing Oracle Database Mobile Server 11gR2

    - by Eric Jensen
    I'm pleased to announce that Oracle Database Mobile Server 11gR2 has been released. It's available now for download by existing customers, or anyone who wants to try it out. New features include: Support for J2ME platforms, specifically CDC platforms including OJEC(this is in addition to our existing support for Java SE and SE Embedded) Per-application integration with Berkeley DB on Android Server-side support for Apache TomEE platform Adding support for Oracle Java Micro Edition Embedded Client (OJEC for short) is an important milestone for us; it enables Database Mobile Server to work with any of the incredibly wide array of devices that run J2ME. In particular, it enables management of  networks of embedded devices, AKA machine to machine (M2M) networks. As these types of networks become more common in areas like healthcare, automotive, and manufacturing, we're seeing demand for Database Mobile Server from new and different areas. This is in addition to our existing array of mobile device use cases. The Android integration feature with Berkeley DB represents the completion of phase I of our Android support plan, we now offer a full set of sync, device and app management features for that platform. Going forward, we plan to continue the dual-focus approach, supporting mobile platforms such as Android, and iOS (hint) on the one hand, and networks of embedded M2M devices on the other. In either case, Database Mobile Server continues to be the best way to connect data-driven applications to an Oracle backend.

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  • What partition to use to keep data files in Ubuntu?

    - by Martin Lee
    I have been using Ubuntu for a few years and usually my partition set up was the following: Ext3 or Ext4 partition for the system itself (20 GB); A 10 GB swap partition; a big FAT32 partition to store movies, photos, work stuff, etc. (depends on the capacity of the disk, but usually it is what is left from Ext3+Swap, currently it is more than 200 GB). Does this setup sound right? I am considering to switching to one big Ext3 partition now, because the problem with Fat32 in Ubuntu has not gone anywhere: for example, right now I can access my 'big' partition with a 'Data' label only through /media/_themes?END. Pretty strange name for a partition, isn't it? some Linux software fail to read/write on this partition. For example, if I want to play around with rebar and build/make/compile things on this FAT32 partition, it will always complain about permissions and won't work (the same goes for many other kinds of software); it is not stable, I can not refer to some files on this FAT32 partition, because after the next reboot it will be called not '_themes?END', but something else. On the other side I usually begin to run out of space on the Ext3 partition after a few months of usage. So, the question is - what is the best setup of partitions for an Ubuntu system? Should a FAT32 partition be used at all?

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  • Internal hard drive, can't format

    - by user113923
    I cannot format anymore the hard drive of my laptop. Here is how I proceed: I am starting my computer with a USB live drive (Ubuntu 10.04 LTS - the Lucid Lynx). Then I start disk utility and try to format the hard drive - I choosed to format the Master boot record but I get the following error: Error creating partition table: helper exited with exit code 1: Error calling fsync(2) on /dev/sda: Input/output error If I try to delete partitions I get the following error Error erasing: helper exited with exit code 1: In part_del_partition: device_file=/dev/sda, offset=32256 Entering MS-DOS parser (offset=0, size=30005821440) MSDOS_MAGIC found looking at part 0 (offset 32256, size 4096157184, type 0x83) new part entry looking at part 1 (offset 10618836480, size 8414461440, type 0x83) new part entry looking at part 2 (offset 19033297920, size 1077511680, type 0x82) new part entry looking at part 3 (offset 20110809600, size 9895011840, type 0x07) new part entry Exiting MS-DOS parser MSDOS partition table detected got it got disk got partition - part-type=0 Error: Input/output error during write on /dev/sda ped_disk_commit_to_dev() failed If I try to install ubuntu frrom the usb on the hard drive and choose erase and use the entire disk I get the error message Input/output error during write on /dev/sda For side infos I have at the moment 4 partitions on my hard drive: /dev/sda1 (ext2) /dev/sda2 (ext2) /dev/sda3 (swap) /dev/sda1 (ntfs) + /dev/sda (unlocated Space) My ultimate goal is to reinstall ubuntu and have only 2 partitions... I would really appreciate any help here! Thanks JB

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  • @CodeStock 2012 Review: Leon Gersing ( @Rubybuddha ) - "You"

    "YOU"Speaker: Leon GersingTwitter: @Rubybuddha Site: http://about.me/leongersing I honestly had no idea what I was getting in to when I sat down in to this session. I basically saw the picture of the speaker and knew that it would be a good session. I was completely wrong; it was the BEST SESSION of CodeStock 2012.  In fact it was so good, I texted another coworker attending the conference to get over and listen to Leon. Leon took on the concept of growth in the software development community. He specifically referred David Hansson in his ability to stick to his beliefs when the development community thought that he was crazy for creating Ruby on Rails. If you do not know this story Ruby on Rails is one of the fastest growing web languages today. In addition, he also touched on the flip side of this argument in that we must be open to others ideas and not discard them so quickly because we all come from differing perspectives and can add value to a project/team/community. This session left me with two very profound concepts/quotes: “In order to learn you must do it badly in front of a crowed and fail.” - @Rubybuddha I can look back on my career so far and say that he is correct; I think I have learned the most after failing, especially when I achieved this failure in front of other. “Experts must be able to fail.” - @Rubybuddha I think we can all learn from our own mistakes but we can also learn from others. When respected experts fail it is a great learning opportunity for the entire team as well as the person who failed. When expert admit mistakes and how they worked through them can be great learning tools for other developers so that they know how to avoid specific scenarios and if they do become stuck in the same issue they will know how to properly work their way out of them.

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  • C++ Numerical Recipes &ndash; A New Adventure!

    - by JoshReuben
    I am about to embark on a great journey – over the next 6 weeks I plan to read through C++ Numerical Recipes 3rd edition http://amzn.to/YtdpkS I'll be reading this with an eye to C++ AMP, thinking about implementing the suitable subset (non-recursive, additive, commutative) to run on the GPU. APIs supporting HPC, GPGPU or MapReduce are all useful – providing you have the ability to choose the correct algorithm to leverage on them. I really think this is the most fascinating area of programming – a lot more exciting than LOB CRUD !!! When you think about it , everything is a function – we categorize & we extrapolate. As abstractions get higher & less leaky, sooner or later information systems programming will become a non-programmer task – you will be using WYSIWYG designers to build: GUIs MVVM service mapping & virtualization workflows ORM Entity relations In the data source SharePoint / LightSwitch are not there yet, but every iteration gets closer. For information workers, managed code is a race to the bottom. As MS futures are a bit shaky right now, the provider agnostic nature & higher barriers of entry of both C++ & Numerical Analysis seem like a rational choice to me. Its also fascinating – stepping outside the box. This is not the first time I've delved into numerical analysis. 6 months ago I read Numerical methods with Applications, which can be found for free online: http://nm.mathforcollege.com/ 2 years ago I learned the .NET Extreme Optimization library www.extremeoptimization.com – not bad 2.5 years ago I read Schaums Numerical Analysis book http://amzn.to/V5yuLI - not an easy read, as topics jump back & forth across chapters: 3 years ago I read Practical Numerical Methods with C# http://amzn.to/V5yCL9 (which is a toy learning language for this kind of stuff) I also read through AI a Modern Approach 3rd edition END to END http://amzn.to/V5yQSp - this took me a few years but was the most rewarding experience. I'll post progress updates – see you on the other side !

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  • Ubuntu boot problem/unity failure

    - by Kenny
    So here I am sitting in a big pile of muck...over the last 2 days things have just been going from bad to worse with version of Ubuntu 12.10. So 2 days ago I was fiddling around with kismet and airmon-ng. I had added a bunch of libraries, I remember adding GTK+, Glib, Pango, etc. After restarting the other day my desktop opened fine but my background was changed to the default and none of my files on the desktop were visible and the top bar and side bar were not visible or functioning. The window managers were still working. I then tried reinstalling my nvidia drivers to see if that would change anything, it did not. Then after doing some searching online I found something that suggested I try deleting the file "libgtk-3.so.0". I deleted this and tried to restart the computer. Upon restart, I was greeted by a black screen with some writing saying something about -starting clamAV [OK] -problem with Apache Server could not verify correct...something... - checking battery state [ok]. After it gets to battery state it just stops and sits there indefinitely. So to sum, I cannot login to ubuntu because it just sits at this black screeen. If anyone has any idea as to what is going on and how to fix it please let me know. Thanks!

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  • Problem with Ogre::Camera lookAt function when target is directly below.

    - by PigBen
    I am trying to make a class which controls a camera. It's pretty basic right now, it looks like this: class HoveringCameraController { public: void init(Ogre::Camera & camera, AnimatedBody & target, Ogre::Real height); void update(Ogre::Real time_delta); private: Ogre::Camera * camera_; AnimatedBody * target_; Ogre::Real height_; }; HoveringCameraController.cpp void HoveringCameraController::init(Ogre::Camera & camera, AnimatedBody & target, Ogre::Real height) { camera_ = &camera; target_ = &target; height_ = height; update(0.0); } void HoveringCameraController::update(Ogre::Real time_delta) { auto position = target_->getPosition(); position.y += height_; camera_->setPosition(position); camera_->lookAt(target_->getPosition()); } AnimatedBody is just a class that encapsulates an entity, it's animations and a scene node. The getPosition function is simply forwarded to it's scene node. What I want(for now) is for the camera to simply follow the AnimatedBody overhead at the distance given(the height parameter), and look down at it. It follows the object around, but it doesn't look straight down, it's tilted quite a bit in the positive Z direction. Does anybody have any idea why it would do that? If I change this line: position.y += height_; to this: position.x += height_; or this: position.z += height_; it does exactly what I would expect. It follows the object from the side or front, and looks directly at it.

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  • Drupal 7 Advice Needed: "Portal" Creation

    - by WernerCD
    Question: What is the best game plan for building what I want. I'm rebuilding the company intranet and am trying to get our "Portals" system re-created in Drupal. I'm trying to learn Panels, because thats what I think would do this, but I just can't seem to get it working. Menu at top, drop down lists for various webpages, tools, internal applications... and Department Portals. When you click on a department portal, you get the same menu at top... and on the main part of the page you have a menu on the left, with content on the right. Menu stays on the left, content loads next to it. Each Portal has its own menu and content (least of which is "Home"). Ultimately, I'd like to be able to say - users with role "Foo" can add/edit/delete Portal Bar. - Each Portal starts with a "Home" - Each Portal has its own Menu tree's. (Picture 2 above has a < ul for video tutorials that would be a second level menu. So more than one deep.) - Content on the right side of the portal should be flexible (Video, PDF via fileviewer, etc) - Portal Bar should have its own Folder to contain it's content. I'm trying to do this in Panels, but I can't seem to put the pieces together in my mind and in practice. I hope I'm making sense, because the dizzying array of stuff is killing me lol.

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  • How to handle editing a large file for a non-technical user

    - by Luke
    I have a client who is given a tab delimited .txt file containing hundreds of thousands of rows. I have a user story as follows: As a user I want to take the text file and add a new value at the end of each line which contains the concatenated value of two of the columns. for example if the file read text_one text_two I need to output the following (preferably to a .txt file) text_one text_two text_onetext_two My first approach was to ask the vendor supplying the file to do the concatenation before providing the file, the easiest way to solve a problem is to eliminate it right? however they are very uncooperative and have point blank refused. I've looked at building a simple javascript application that does this client side so a non-technical user could select the file using a file selector. This approach has a few problems The file could be over a GB in size and so can't be loaded straight into memory, I've tried and the browser crashes There is no means to write a file in javascript so I'd need to output the content to the screen and have the user save it (somehow) I was thinking if I could get around the filesize limitations I could just output the edited content to the page and have the user save the page as a .txt file, however I think there is a better way than using javascript that will still accommodate the users lack of technical know-how. Please consider this question to be stack agnostic, but bear in mind that a nice little shell script or python script would be deemed unsuitable for a non technical user unless there is a way of "packaging" it nicely for a non-technical user. Updates The file is too large to open in excel. The process needs to be run weekly, but it doesn't require scheduling or automation...(yet)

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  • How To Capture Screenshot Of Logon Screen In Windows 7?

    - by Gopinath
    There are plenty of freeware’s and paid applications that lets you capture screenshots. But none of them let you grab screenshot of Logon screen. In order to capture the screenshots of Logon screen we either had to use a Digital Camera and take a photo or run Windows in a virtual environment and capture screenshot.  Is there any other simple and easy way to grab Logon screenshots in Windows 7? Windows 7 Login Camera is a nice freeware that lets you capture screenshots of Logon screen very easily. To grab the screenshots install the application, lock the screen by pressing CTRL + L and use ease of access button located on the bottom left side. Windows 7 Login Camera launches and allows you save the captured screen on desired location. This handy tool is developed by deviantart.com website user yvidhiatama  and it’s compatible with all the 32bit version of Windows 7. Download Windows 7 Login Camera This article titled,How To Capture Screenshot Of Logon Screen In Windows 7?, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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  • Entity Framework and distributed Systems

    - by Dirk Beckmann
    I need some help or maybe only a hint for the right direction. I've got a system that is sperated into two applications. An existing VB.NET desktop client using Entity Framework 5 with code first approach and a asp.net Web Api client in C# that will be refactored right yet. It should be possible to deliver OData. The system and the datamodel is still involving and so migrations will happen in undefined intervalls. So I'm now struggling how to manage my database access on the web api system. So my favourd approch would be us Entity Framework on both systems but I'm running into trouble while creating new migrations. Two solutions I've thought about: Shared Data Access dll The first idea was to separate the data access layer to a seperate project an reference from each of the systems. The context would be the same as long as the dll is up to date in each system. This way both soulutions would be able to make a migration. The main problem ist that it is much more complicate to update a web api system than it is with the client Click Once Update Solution and not every migration is important for the web api. This would couse more update trouble and out of sync libraries Database First on Web Api The second idea was just to use the database first approch an on web api side. But it seems that all annotations will be lost by each model update. Other solutions with stored procedures have been discarded because of missing OData support and maintainability. Does anyone run into same conflicts or has any advices how such a problem can be solved!

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  • Google analytics - drop in traffic

    - by Andy
    Bit of a general question here. We are in the process of converting a number of our clients from older web sites to new ones. The problem we are getting, and sorry for being so general here, is we are getting a sharp decline in traffic as reported on Google Analytics. It's not a gradual decline, it seems to hit almost as soon as the new site goes live. I've just got a few questions to see if there is something we are doing wrong: a) We are using the same analytics accounts going from old to new site. Is this a bad idea? b) The actual analytics code is integrated into the pages using a server-side include. IS this a bad idea? c) We structure our sites differently to our old site. IE. The old sites would pretty must have all the web pages in the root directory, and hyperlinks would be linked to the page files: EG. <a href="somepage.aspx">Link</a> Our new sites now have a directory structure that pretty much reflects the navigation structure, and hyper links link to the pages directory instead of the actual page: EG. <a href="/new-items/shoes/">New shoes</a> Is this a bad idea. I'm really searching for a needle in a haystack here. Would appriciate any help or advice as to why we are getting such a sharp and sudden drop in traffic. Again, so this is such a general question. Thanks in advance.

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