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• Projecting onto different size screens by cropping

  - by Jason

  Hi, I am building a phone application which will display a shape on screen. The shape should look the same on different screen sizes. I. Decided the best way to do this is to show more of the background on larger screen keeping the shapes proportion the same on all screens. My problem is I am not sure how to achieve this, I can query the screen size at runtime and calculate how different it is from the six is designed for but I am not sure what to do with this value. What kind of projection should I use for my orthographic matrix an hour will I display more on larger screens and not loose information on smaller screens? Thanks, Jason.

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• How do I find the closest points(thereby forming a polygon) enclosing a particular point?(see image)

  - by nilspin

  I am working with a game engine, and my task is to add code for simulating fracture of rigid meshes. Right now I'm only working on breaking a cube. I am using Voronoi's algorithm to make a (realistic)fractured shard and I am using the half-plane method to generate a voronoi cell. Now the way I do this is for every seed point, I make planes that are perpendicular bisector planes(the straight black lines in the image) with rest of the seed points and I calculate the intersections of all these planes to give me distinct points(all the orange dots). I've gotten this far. Out of all these calculated intersection points, I only need the ones that are closest and enclosing the seed point(the points encircled in red) and I need to discard all the rest. Information that I have : 1) Plane equations of all planes(defined by normalized normal vectors and their distance from origin) 2) Points of intersection(that I've calculated) Can anybody help me find out how I can find the points encircled in red? Thanks.

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• Linear search vs Octree (Frustum cull)

  - by Dave

  I am wondering whether I should look into implementing an octree of some kind. I have a very simple game which consists of a 3d plane for the floor. There are multiple objects scattered around on the ground, each one has an aabb in world space. Currently I just do a loop through the list of all these objects and check if its bounding box intersects with the frustum, it works great but I am wondering if if it would be a good investment in an octree. I only have max 512 of these objects on the map and they all contain bounding boxes. I am not sure if an octree would make it faster since I have so little objects in the scene.

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• Learning functional programming [closed]

  - by Oni

  This question is similar to Choosing a functional programming language. I want to learn functional programming but I am having troubles choosing the right programming language. At the university I studied Haskell for 2 months, so I have a basic idea of what a functional language is. I have read a lot that functional programming change your way of think. I started to take a look to Clojure, which I like for several reasons(code as data, JVM, etc). What stops me from continue learning Clojure is that it is not a pure functional language and I am afraid of ending up using imperative/OO style. Should I learn Haskell or keep on learning Clojure? Thanks in advance P.D: I am open to any other language.

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• Today is my first day in the land of backbone.js

  - by Andrew Siemer - www.andrewsiemer.com

  I am semi-excited to say that today is my first day into the land of backbone.js.  This will of course take me into many other new javascript-y areas.  As I have primarily been focused on building backend systems for the past many years…with no focus on client side bits…this will be all new ground for me.  Very exciting! I am sure that this endeavor will lead to writing about many new findings along the way.  Expect the subject of near future postings to not be related to MVC or server side code. I am starting this journey by reading through the online book “Backbone Fundamentals”.  http://addyosmani.com/blog/backbone-fundamentals/  Has anyone read this yet?  Any feed back on that title. I have read though Derrick Bailey’s thoughts here and here…also very good. Any suggestions on other nuggets of learning backbone?

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• Where is the object browser in VS 2010

  - by Keltari

  I am teaching myself C# and Im using a book that references Visual Studio 2008. However, I am using VS 2010. The book wants me to look at the object browser by choosing View, Other Windows, Object Browser from the menu. However, the object browser is not there. I moused over the icons on the menu and nothing stood out. So, where is it? Also, am I going to run into more problems like this? Is it worth getting an updated book?

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• How to prevent Google from finding my admin index page?

  - by krish

  I am running a website but for some days i stopped it and put the under-construction page because the Index of admin page is visible to the outside world through the Google search. One of my friend told me that your websites index is visible and its one step away to access the password file and he shows me that very simply using the Google search. How can i prevent this and i am hosting my site with a hosting company and i report about this to them but they simply replied to me still its secure so you no need to worry... am i really don need to worry and continue my site with the visible index of admin page?

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• How to get projects and payments formally in the name of company.

  - by piemesons

  I am having a serviced based registered firm. I am having some basic questions. I want to know how to take projects formally in the name of the company.(I have clients, Just need to know the procedure.) I need to make some general agreement for clients? Also, how to take payment. I was working as part time free lancer from 1.5 years and was taking payments directly in my account. Now as I have registered the firm so i want to know the exact procedure to follow. Please let me know about this. EDIT I am having a registered firm in India and most of the clients are from US(80%) or UK(20%)

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• Sharing samba-folder with root access

  - by Industrial

  Hi everyone, I have a staging server in my network running Ubuntu server 10.10, being my main development area. As I need to access the files in the Apache root from other computers in the network, I have setup samba with the following settings: [www] comment = Apache root www path = /var/www writable = yes force user = root force group = root On the host computer, running Ubuntu 10.10 desktop, I am trying to mount the drive with a bash file looking like below: #!/bin/bash sudo mount -t cifs //192.168.1.5/www /media/www/ -o username=myusername,password=mypassword,rw,iocharset=utf8,file_mode=0777,dir_mode=0777 What happens is that I get mount error(13): Permission denied Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) thrown in my face whilst trying to execute the mount. I've done exactly the same, with exactly the same smb.conf & mount-bash file on another computer in my network, but this just wont work. What am I doing wrong? I am running out of ideas.

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• How to switch from developer to dba? [on hold]

  - by lamwaiman1988

  I am working as a developer for 3 years and I am thinking of switch to dba. I do not own any certificate nor received any training regarding the daily job of dba. My company also do not offer any chance of work/training related to a dba. If I want to be a dba ( because of the salary and a much stable job than developer ), should I go to get some oracle certificates? I've also heard that you can't be a good dba if you cannot get a good understanding about the working OS such as windows/unix ( and to do that you also need to get some certificate on windows administration or unix administration ) but they recommend book of Rich Stevens over certificate. I am confused on what should I do to make this happen.

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• Connectify like functionality on Ubuntu running on T61 - wifi 4965 AGN

  - by Vivek Sharma

  I would like to use my laptop as an Access point, so that i can connect my phones through Wifi. I have done this my office laptop T410. I am having T61 with wifi module 4965. Connectify on windows does not support it. I am following -- https://help.ubuntu.com/community/WifiDocs/WirelessAccessPoint to make achieve WAP capability on my T61 running ubuntu 10.10. The link says something about "master mode", how do i put my T61 wifi-inter4965 in master mode. Can i install madwifi or atheros drivers on it. I am using galaxy S froyo, and it does not support Ad-hoc network. Has anyone tired to achieve this.

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• Online Classes on ASP .Net for FREE

  Here are some of the FREE upcoming ASP .Net classes at WiZiQ. 1. 5 imp ASP.NET interview questions by Questpond    Sunday, April 11, 2010 12:30 AM (EST)5 imp .NET interview questions by Questpond     Sunday, April 18, 2010 12:30 AM (EST)3. 5 imp ADO.NET interview questions by Questpond     Saturday, April 24, 2010 12:30 AM (EST)4. 5 important .NET interview questions by ...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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• A good course on HTML/CSS/JS/UX worth it in part time?

  - by zengr

  I am a java/ruby developer from the last 3yrs, trying my hands on JS now. I am fascinated by the awesome UI designs these days. Any app I make, the worst aspect is the UI and I suck at it. I end up copying a design and with a crappy one. I am a student in San Jose, CA, and will be working from next month on Java most probably. My questions are: Are there any good courses (in the the colleges in silicon valley) on web Design (Photoshop), html, css, JS? Is it worth it?

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• redefine shortcuts for keys being set to default after reboot

  - by MYA

  i am using PHPStorm editor on Ubuntu 14.04. Everything is so smooth that I am loving the experience (especially the workspace experience is amazing) however this bug is giving me headache... some of the editor's short-cuts clash with default Ubuntu keys (Alt + Ctrl + Left,Right,Up or Down arrow keys). I have changed the default keys to (super + Left,Right,Up and Down arrow keys) so they don't collide with my editor but after the reboot, Ubuntu changes are somehow reverting to default. This keeps comming again and again. i am sure there is a way out so therefore need help with that...

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• displaying first few pages of a pdf on a page = duplicate content?

  - by Ace

  I am embedding scribd pdfs on my website. These are exam papers pdf which are available on other websites. As it is scribd is an embed/iframe, I think google considers my page as being empty with no content; google does see iframe content right? So I decided to display the first pages of the pdf as text on the page for google. Then, for user experience, i hide the text and replace it with the scribd embed code using javascript. I have 2 worries about this method. Firstly, i am displaying the first pages of the pdf and the latter may be hosted on other websites, will this be considered as duplicate content. Secondly, I am hiding the content and replacing it with the scribd embed with javascript; is it considered bad by google?

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• Problem in calling a method recursively in nodejs mongodb [closed]

  - by Nilesh

  I am trying to create a tree using nodejs and mongodb.Wanted to show a path of a particulr node from the root.So I am finding the destination path and looping back to its parent iteratively until the root.So this is the snippet I am using which results in infinite looping articleProvider.finditsparent(t,function(error,tap){ if(tap[0].parent=='null') { t=(tap[0].parent); console.log(n); } else { n.push(tap[0].parent); console.log(tap[0].parent); t=(tap[0].parent); res.send(n); } }); res.send(n); }); How should I get rid of this problem?Is there any way to call it recursively?

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• View Frustum Alternative

  - by Kuros

  I am working on a simulation project that requires me to have entities walking around in a 3D world. I have all that working, matrix transformations, etc. I'm at the point where I need what is essentially a view frustum, so I can give each entity a visible area. However, when looking over the calculations required to do it, it seems like a perspective frustum is only required to be able to project it onto a 2D screen. Is there another, easier to code solution, that would function better, such as an orthogonal perspective? Could I just define a shape mathematically and test wether the coordinates of the objects are inside or out? I am not really a 3D coder (and I am doing this all from scratch, not using an engine or anything), so I would like the simplest solution possible for my needs. Thank you!

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• Why Nodes.js being that "unique"?

  - by Adrian Shum

  Recently years there are lots of praise to Nodes.js. I am not a developer that have much exposure on network application. From my bare understanding of Nodes.js, its strength is: We are having only on thread handling multiple connections, providing a event-based architecture. However, for example in Java, what if I am having only one thread, using NIO/AIO (which is non-blocking APIs from my bare understanding), and handle multiple connections using that thread, and I provide an event-based architecture to implement the data handling logic (shouldn't be that difficult by providing some callback etc) ? Given JVM being a even more mature VM than V8 (I expect it run faster too), and event-based handling architecture seems not something difficult to create. I am not sure why Nodes.js is attracting so much attention. Did I miss some important points?

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• Generating AdSense ad impression?

  - by Danny

  I owned two website. Let's say as example www.first.com and www.second.com. I have two apps in Google chrome-store whose app URL is: app1 URL = www.first.com/currency_converter.php app2 URL = www.first.com/currency_converter.php respectively. Currently if user lunch/click on first app URL then I am forwarding them to my first website homepage (www.first.com), where I have AdSense code with currency converter app. In this way I am generating Google ad impression and traffic for my first website (i.e www.first.com). So is this valid way? Does I am violating any Google AdSense rule? Please provide your reply or suggestions. P.S.: Please comment, if my question is not clear, I will try to write it in some other way.

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• Page for Page Redirect in Google App Engine

  - by clifgray

  I have recently changed domain name for a webapp I run on Google App Engine and I am wondering if there is a simple way to do a page for page redirect from my old website to the new domain. Everything code wise is staying exactly the same but I just want it to go to the new domain. I am using python and the webapp2 framework for the webapp. I know I could go through and for every single handler do: webapp2.redirect('the specific url', permanent=True) But I am hoping for a simpler solution.

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• is box-shadow (CSS3) really not ready to use? (according to "CAN I USE")

  - by mechdeveloper

  I have a problem that I want you to help me, I am currently making a website, I am building that website on HTML5 and CSS3 technology, every feature I'd like to use I check it first in "CAN I USE", the technology I use most is box-shadow, and I already made some great things with it but, I have a doubt about the percentage of browser that don't support that technology, the percentage of browser that do not support box-shadow is around 17.12%, and if you see the conclusions (show options = other options = show conclusions) they say that that feature isn't ready yet because they are "Waiting for Opera Mini 5.0-6.0 to expire", I personally think that the best that we can do in order to make people update their browsers is not support older browser, but ... am I right thinking like this? will I have bad consecuences if I don't support older browsers? is worth to work twice just to support older browsers? should I still working with box-shadow?

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• How can I set 'Print to File' as my default printing option?

  - by edm

  At the moment when I print, my Deskjet-3050 is selected as the default printer. I would like 'Print to File' to be the default 'printer' without using cups-pdf I specifically do not want to use cups-pdf because of the way it renders text (see below). I am not entirely sure what it is doing but it seems as though it renders the text as bitmaps and embeds them in pdf (as I am not able to highlight/copy/search embedded text as I am using a standard Print to File pdf). N.B. this is not a dupe of: Can I make PDF the default for 'print to file'

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• Procedural Planets, Heightmaps and Textures

  - by henryprescott

  I am currently working on an OpenGL procedural planet generator. I hope to use it for a space RPG, that will not allow players to go down to the surface of a planet so I have ignored anything ROAM related. At the moment I am drawing a cube with VBOs and mapping onto a sphere. I am familiar with most fractal heightmap generating techniques and have already implemented my own version of midpoint displacement (not that useful in this case I know). My question is, what is the best way to procedurally generate the heightmap. I have looked at libnoise which allows me to make tilable heightmaps/textures, but as far as I can see I would need to generate a net like this. Leaving the tiling obvious. Could anyone advise me on the best route to take? Any input would be much appreciated.

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• webmaster tools 500 crawl error for asp faceted navigation that does not exist

  - by user19007

  i am getting 2,500 type 500 url errors in google webmaster tools. These pages are faceted navigation results that can not be reached by a site visitor. These pages do not exist. We are using faceted navigation with the Volusion platform (asp.net, I think). I have specified url parameters in webmaster tools so that google will not try to index anything faceted. This does not stop the errors from generating. I am concerned about how this might effect seo (bleeding page rank). I can provide additional information if needed. I am not sure how to solve this. I have started down the path of creating 301's, but having some difficulty there as well.

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• Dependency Injection Confusion

  - by James

  I think I have a decent grasp of what Dependency Inversion principle (DIP) is, my confusion is more around dependency injection. My understanding is the whole point of DI is to decouple parts of an application, to allow changes in one part without effecting another, assuming the interface does not change. For examples sake, we have this public class MyClass(IMyInterface interface) { public MyClass { interface.DoSomething(); } } public interface IMyInterface { void DoSomething(); } How is this var iocContainer = new UnityContainer(); iocContainer.Resolve<MyClass>(); better practice than doing this //if multiple implementations are possible, could use a factory here. IMyInterface interface = new InterfaceImplementation(); var myClass = new MyClass(interface); It may be I am missing a very important point, but I am failing to see what is gained. I am aware that using an IOC container I can easily handle an objects life cycle, which is a +1 but I don't think that is core to what IOC is about.

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