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• How to transform mesh components?

  - by Lea Hayes

  I am attempting to transform the components of a mesh directly using a 4x4 matrix. This is working for the vertex positions, but it is not working for the normals (and probably not the tangents either). Here is what I have: // Transform vertex positions - Works like a charm! vertices = mesh.vertices; for (int i = 0; i < vertices.Length; ++i) vertices[i] = transform.MultiplyPoint(vertices[i]); // Does not work, lighting is messed up on mesh normals = mesh.normals; for (int i = 0; i < normals.Length; ++i) normals[i] = transform.MultiplyVector(normals[i]); Note: The input matrix converts from local to world space and is needed to combine multiple meshes together.

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• Method chaining vs encapsulation

  - by Oak

  There is the classic OOP problem of method chaining vs "single-access-point" methods: main.getA().getB().getC().transmogrify(x, y) vs main.getA().transmogrifyMyC(x, y) The first seems to have the advantage that each class is only responsible for a smaller set of operations, and makes everything a lot more modular - adding a method to C doesn't require any effort in A, B or C to expose it. The downside, of course, is weaker encapsulation, which the second code solves. Now A has control of every method that passes through it, and can delegate it to its fields if it wants to. I realize there's no single solution and it of course depends on context, but I would really like to hear some input about other important differences between the two styles, and under what circumstances should I prefer either of them - because right now, when I try to design some code, I feel like I'm just not using the arguments to decide one way or the other.

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• Oracle Hosts Successful PeopleSoft Customer Advisory Board Meetings

  - by Mark.Hoernemann

  Last week, Oracle hosted the annual Customer Advisory Board meetings for various PeopleSoft applications, including the PeopleTools CAB.  The three day event at the Oracle headquarters brought together over 90 customers, with over 170 representatives taking part.  This was the largest CAB event PeopleSoft has had to date.  The focus of the event was to share our vision for PeopleSoft, and gain valuable input from our customer base on our direction and focus areas.  The customer feedback we received for the event was extremely positive, matching the sentiment on our side.  The information our CAB members provided was excellent; it will help ensure that we focus on the areas that matter most to our customers.   I’d like to thank all the customers that took the time out of their schedules to hear where we’re looking to go in the future, and provide guidance on how we can best assist our customer base on remaining successful in the marketplace.

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• How to unit test image processing code?

  - by rold2007

  I'm working in image processing (mainly OCR) and I wonder how I should integrate unit tests in my development. I'm already using unit tests for more "common" type of code but when dealing with image processing code I'm not sure how to deal with it. This kind of code always need some image data input/output and mocking this is not obvious. For now I'm mostly doing integration tests but they take a while to run and I would like some ideas on how to break down this kind of code into unit tests so that I can run them more quickly.

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• Sound not working for uid=1003 but working fine for uid=1000

  - by Dirk Eddelbuettel

  Sounds works for uid=1000, but not for the main user on the system, running with uid=1003. Upon boot, the Ubuntu chime clearly plays. When the user is logged in, sound test shows no input device. I looked at several of the previous questions, added the user to audio, video, pulse, pulse-access --- but still no luck. To recap: This worked perfectly in 11.04, 11.10, 12.04. It works for the default user uid=1000, it does not work for the actual user. The differing group memberships are mainly for adm, admin, sudo and the like.

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• Keeping It Real With Microsoft Office: Asking Questions About Solution Design

  I just finished a whirlwind swing through Amsterdam, The Hague, Antwerp, and finally Vienna Austria. I've already blogged about the first three cities, but this last one is the focus of this post. I went to Vienna mainly to meet with some customers in order to provide guidance around Office solutions and also to gather input and feedback. Most of my time on Friday 2 April was spent meeting with Rubicon, one of our Gold Partners based in Vienna. Thomas Kuhta, CEO for Rubicon, and his team including...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Physics-based dynamic audio generation in games

  - by alexc

  I wonder if it is possible to generate audio dynamically without any (!) audio assets, using pure mathematics/physics and some input values like material properties and spatial distribution of content in scene space. What I have in mind is something like a scene, with concrete floor, wooden table and glass on it. Now let's assume force pushes the glass towards the edge of table and then the glass falls onto the floor and shatters. The near-realistic glass destruction itself would be possible using voxels and good physics engine, but what about the sound the glass makes while shattering? I believe there is a way to generate that sound, because physics of sound is fairly known these days, but how computationaly costy that would be? Consumer hardware or supercomputers? Do any of you know some good resources/videos of such an experiment?

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• Unity3D problem. Bullets fall down instead of flying like they should

  - by user2342080

  I used this tutorial as a reference. http://www.youtube.com/watch?v=3L8eaoyZ0Go My problem is that whenever I play the game, EVERYTHING works but the bullets. It just falls down instead of flying forward. This is the flash version of the game: http://v1k.me/swf/ Can some one help me out? Should I upload the project? This is my "Shoot.js": public var bulletPrefab : Transform; public var bulletSpeed : float = 20; function Update() { if(Input.GetMouseButton(0)) { if(bulletPrefab || bulletSpeed) { var bulletCreate = Instantiate(bulletPrefab, GameObject.Find("SpawnPoint").transform.position, Quaternion.identity); bulletCreate.rigidbody.AddForce(transform.forward * bulletSpeed); } } }

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• Unity3D Android - Move your character to a specific x position

  - by user3666251

  Im making a new game for android and I wanted to move my character (which is a cube for now) to a specific x location (on top of a flying floor/ground thingy) but I've been having some troubles with it.I've been using this script : var jumpSpeed: float = 3.5; var distToGround: float; function Start(){ // get the distance to ground distToGround = collider.bounds.extents.y; } function IsGrounded(): boolean { return Physics.Raycast(transform.position, -Vector3.up, distToGround + 0.1); } function Update () { // Move the object to the right relative to the camera 1 unit/second. transform.Translate(Vector3.forward * Time.deltaTime); if (Input.anyKeyDown && IsGrounded()){ rigidbody.velocity.x = jumpSpeed; } } And this is the result (which is not what I want) : https://www.youtube.com/watch?v=Fj8B6eI4dbE&feature=youtu.be Anyone has any idea how to do this ? Im new in unity and scripting.Im using java btw. Ty.

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• Should functions of a C library always expect a string's length?

  - by Benjamin Kloster

  I'm currently working on a library written in C. Many functions of this library expect a string as char* or const char* in their arguments. I started out with those functions always expecting the string's length as a size_t so that null-termination wasn't required. However, when writing tests, this resulted in frequent use of strlen(), like so: const char* string = "Ugh, strlen is tedious"; libFunction(string, strlen(string)); Trusting the user to pass properly terminated strings would lead to less safe, but more concise and (in my opinion) readable code: libFunction("I hope there's a null-terminator there!"); So, what's the sensible practice here? Make the API more complicated to use, but force the user to think of their input, or document the requirement for a null-terminated string and trust the caller?

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• creating object parameters in {}?

  - by RealityDysfunction

  I am trying to decode a piece of code from a book: List<Person> people = new List<Person>() { new Person {FirstName="Homer",LastName="Simpson",Age=47}, new Person {FirstName="Marge",LastName="Simpson",Age=45} }; Person is just a simple class they made, with a bunch of fields: Name, Last Name, etc... What I don't understand is, don't we send parameters to a constructor of Person in non-curly brackets? I tried replicating this code, but it doesn't seem to fly, any takers? Thanks for input.

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• Why won't Ubuntu copy large files to FAT32 flash Drives?

  - by yurividal

  Since I installed 11.10 I am unable to copy large files (say 1gb or more) to ANY usb drive that is formated as FAT. The file starts copying, but soon an error appears, saying "Unable to Copy" . "Error splicing file: Input/output error". I am able to do it via terminal, using the cp command. I use Gnome3, but the same error has happened in Unity as well. Apparently it works if I format the USB drive as NTFS or EXT3, EXT4. But, for many appliances, FAT is necessary. The problem is also not with the USB port, because it works under Windows. It did not happen before, when I had 10.04 installed.

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• Port 21 will not open. status is closed. forward port 21 to new domains.

  - by Bob Swaggerty

  I am having a problem opening port 21 on my Linux Ubuntu server. No matter what i do, i can not get my status to change from closed to open. Here is a recent iptables command i used and the result iptables -A INPUT -p tcp -m tcp --dport 21 -j ACCEPT nmap -p21-22,25,80,443 CCR1 Starting Nmap 4.53 ( http://insecure.org ) at 2012-06-19 03:13 CDT Interesting ports on CCR1.chennaichristianradio.com (5.10.69.98): PORT STATE SERVICE 21/tcp closed ftp 22/tcp open ssh 25/tcp closed smtp 80/tcp open http 443/tcp closed https I also used commands from the advise from this forum http://www.cyberciti.biz/faq/iptables-open-ftp-port-21/ I need to open this for FTP access to the server, and ultimately I need to forward port 21 to 2 domains i am setting up. Thank you for any assistance you can provide -Bob Swaggerty

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• convert video file to .ogg

  - by Levan

  I've been having trouble with this because I'm new to Linux: I would like to convert different video formats to ogv. I found some terminal commands like this: ffmpeg -i input.avi -acodec libvorbis -ac 1 -b 768k output.ogg The problem with these type of commands is that they are intended to change bit rate, fps, or even resolution. I would like to just change the file format without changing anything else about the video. I looked at the man pages for ffmpeg and found some useful info but I don't know how to space command-line options. Are there any easy ways to do this? In addition, is there a command to change the bit rate so that it doesn't go over a certain rate?

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• What is the best wrapping strategy ?

  - by Riduidel

  Hi, I'm planning to integrate an external tool (ffmpeg in my particular case, but it could be anything, in fact, as lolng as its tasks are long running ones). This tool has a lot of command-line parameters. For now, I've done to simple things with it, already requiring me a good bunch of class writing, to embed all the information it can return to me. I now face the even more complex task of having to send it a bunch of parameters and to handle possible errors. So, what is a best way for that ? Create classes containing all possible options Relying upon a reverse equivalent of commons-cli / CliBuilder / OptionParser Directly write all options from user input Obiwan Kenobi powers (or anything I don't even know about) Please notice I do it in an uncommon language (for the sake of me, don't ask me what it is, as it looks like a desperate and sterile union between CoffeeScript and lua), as a consequence, there can be no framework doing what I want in the language I use.

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• How to make Bluetooth headset appear as a sound device?

  - by torbengb

  I have an onboard VIA sound card but no speakers attached. Instead, I want to use my bluetooth headset as my only sound device, both input and output (mono). I plugged in the bt dongle and was impressed that it was ready to use within seconds. I then paired it to my Jabra BT500 headset. No problems so far. I then went to Sound Preferences but no bluetooth is listed, only the onboard VIA sound card. Question: How can I enable my headset, and make it the default all the time?

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• How to give control over keyboard back to X server after Alt + SysRq + R trick

  - by Øystein Tråsdahl

  Situation: an application freezes the X server and no keyboard input works. So I use Alt+SysRq+R to take the keyboard out of raw mode (make the kernel take control of the keyboard away from the X server). I can then type Ctrl+Alt+F1, kill the bad processes, and everything works again. So far so good. But the keyboard is still in the hands of the kernel, making Alt+Left/Right shortcuts for Decr_Console/Incr_Console. This is annoying, and I want to give control over the keyboard back to the X server. I have tried typing Alt+SysRq+R again, this does not switch things back. I have also tried the command kbd_mode -u, but nothing changes. Any advice?

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• What is the difference between "Redirection" and "Pipe"?

  - by John Threepwood

  This question may sound a bit stupid, but I can not really see the difference between redirection and pipes. Redirection is used to redirect the stdout/stdin/stderr, e.g. ls > log.txt. Pipes are used to give the output of a command as input to another command, e.g. ls | grep file.txt. But why are there two operators for the same thing ? Why not just write ls > grep to pass the output through, isn't this just a kind of redirection also ? What I am missing ?

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• URL Rewrite http to https EXCEPT files in a specific subfolder

  - by BrettRobi

  I am trying to force all traffic on my web site to use HTTPS, using the URL Rewrite 2.0 module added to IIS 7.5. I got that working and now have a need to exclude a couple of pages from using SSL. So I need a rule to rewrite all URL except those referencing this folder to HTTPS. I've been banging my head against the wall on this and am hoping someone can help. I tried creating a rule to match all URL except those in a nossl subfolder as in this example: <rule name="HTTP to HTTPS redirect" enabled="true" stopProcessing="true"> <match url="(/nossl/.*)" negate="true" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{HTTPS}" pattern="off" /> </conditions> <action type="Redirect" url="https://{HTTP_HOST}/{R:1}" redirectType="Found" /> </rule> But this doesn't work. Can anyone help?

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• Terminology For Web Development and General Programming/Software?

  - by Zenph

  EDIT: I should clarify. THe particular terms I listed below I fully understand. I also understand w3schools doesn't have the greatest information. These are just examples. I don't expect everybody to understand what an example is, but I hope the majority do. Does anybody have any resources listing terms related to programming and web development, or care to pitch in? Things like: Runtime Build time Framework Library Normalize I'm primarily a PHP developer so anything about that. I really am looking for general terms and specific terms related to web development, PHP, SQL, CSS, HTML. Appreciate any input. Couple I found: http://www.w3schools.com/site/site_glossary.asp http://docs.roxen.com/pike/7.0/tutorial/fundamentals/concepts.xml

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• How do I recover a .ogv on ext4?

  - by gsedej

  Hi! I have very a simple question. How to recover a .ogv file on my /home ext4 partition? I overwrote the .ogv file (I confused input and output in Arista transcoder). I did research. TestDisk can undelete files on FAT and NTFS, but not on EXT4. PhotoRec does not support .ogv recovering. Foremost also does not support .ogv More info: The file is located at: /home/gasper/Video/Webcam/2011-02-02-181200.ogv

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• Keyboard freezes when xorg crashes

  - by gsedej

  Situation is like that. Many times has happened that Xorg freezes and with it also keyboard. Quite some times because of some Compiz effects or Flash (fullscreen switch). Keyboard becomes totaly unresponsive, while mouse still works (I can move cursor, but can't click since desktop freezes) and music still plays and I can connect trough ssh. This is the only way I know I can try to solve problem - either by killing browser&flash or lastly restarting xorg server. This problem appears on more than one Ubuntu computer. My home dekstop with proprietery nvidia driver, on my work where I use noveau driever (opensource driver for geforce) and sometimes (but rarely) also on laptop with ATI graphics (using r300g driver which is really good!). Can someone explains why mouse still works while I can't input from keyboard? (I can't switch to virtual console or do R-E-I-S-U-B command) I have USB keyboard and USB mouse.

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• Intel Atom D425 Problems

  - by Nico

  I have recently bought an Intel Atom D425 mini itx board with OCZ 30 Gig SSD and 1 Gig DDR3 ram. I have installed Ubuntu 10.04 and Crunchbang Statler ok; works fine in both. I tried to install Xubuntu 12.04, Ubuntu 12.04, and Mint 13 Mate. All of those 3 start up, but as soon as you get to install it all goes wrong and the monitor says input not supported. Is it an Intel Atom D425 problem, an Ubuntu problem, or something else? All help would be much appreciated Regards Nico

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• How do I get the Touchpad Settings working on a Dell XPS 13" Ultrabook?

  - by Dennis Wisnia

  Today I got an brand new Dell XPS 13 and I really like it. Wifi/Bluetooth/Brightness works very well. But only the Touchpad makes me insane. Okay, Multitouch is really nice and i love it on my Macbook but... i must click to click. How can I set up that is an "touch" to click? Its makes me insane. click, click, click.. Can I configure it? Update: I checked the proc/devices and got: I: Bus=0011 Vendor=0002 Product=0005 Version=0000 N: Name="ImPS/2 Generic Wheel Mouse" P: Phys=isa0060/serio1/input0 S: Sysfs=/devices/platform/i8042/serio1/input/input11 U: Uniq= H: Handlers=mouse0 event11 B: PROP=0 B: EV=7 B: KEY=70000 0 0 0 0 B: REL=103 Its really bad - and anyone have an Idea that Ubuntu thinks that is an Touchpad??

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• How can I fix latency problems for car game?

  - by Freddy

  Basically I'm trying to make a online car racing game for IOS using Game Center real time multiplayer. I have setup a timer that sends data every 0.02 seconds to the other player with the current position and current angle. However sometimes, it will take LONGER then these 0.02 seconds for the package to be sent and then received. In this case i have implemented a method that "calculate" what the next position should be if no position is received based on the last position and angle. However, when the data then receives for let say 0.04 seconds after, it will change back to the last position, which will result in the car "jumping" back and lag. And If i just keep ignoring the data it will never take any input from the other user. Is their any way to prevent this? I suppose this needs to be fixed with some client-sided algorithm.

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