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• Will we see a trend of "3d" games coming up in the near future?

  - by Vish

  I've noticed that the trend of movies is diving into the world of movies with 3-dimensional camera.For me it provoked a thought as if it was the same feeling people got when they saw a colour movie for the first time, like in the transition from black and white to colour it is a whole new experience. For the first time we are experiencing the Z(depth) factor and I really mean when I said "experiencing". So my question is or maybe if not a question, but Is there a possibility of a genre of 3d camera games upcoming?

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• Java chunk negative number problem

  - by user1990950

  I've got a tile based map, which is divided in chunks. I got a method, which puts tiles in this map and with positive numbers it's working. But when using negative numbers it wont work. This is my setTile method: public static void setTile(int x, int y, Tile tile) { int chunkX = x / Chunk.CHUNK_SIZE, chunkY = y / Chunk.CHUNK_SIZE; IntPair intPair = new IntPair(chunkX, chunkY); world.put(intPair, new Chunk(chunkX, chunkY)); world.get(intPair).setTile(x - chunkX * Chunk.CHUNK_SIZE, y - chunkY * Chunk.CHUNK_SIZE, tile); } This is the setTile method in the chunk class (CHUNK_SIZE is a constant with the value 64): public void setTile(int x, int y, Tile t) { if (x >= 0 && x < CHUNK_SIZE && y >= 0 && y < CHUNK_SIZE) tiles[x][y] = t; } What's wrong with my code?

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• Top SEO Tips - Get Google to Crawl Your Website in Less Than 24 Hours

  No matter if you are a website owner or internet marketing professional it is important to work with Google and from time to time you will need to get Google to crawl yours or you clients website ASAP. This could be for many reasons, one being that your client has changed their domain name or you are launching a new or improved website.

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• Increasing efficiency of N-Body gravity simulation

  - by Postman

  I'm making a space exploration type game, it will have many planets and other objects that will all have realistic gravity. I currently have a system in place that works, but if the number of planets goes above 70, the FPS decreases an practically exponential rates. I'm making it in C# and XNA. My guess is that I should be able to do gravity calculations between 100 objects without this kind of strain, so clearly my method is not as efficient as it should be. I have two files, Gravity.cs and EntityEngine.cs. Gravity manages JUST the gravity calculations, EntityEngine creates an instance of Gravity and runs it, along with other entity related methods. EntityEngine.cs public void Update() { foreach (KeyValuePair<string, Entity> e in Entities) { e.Value.Update(); } gravity.Update(); } (Only relevant piece of code from EntityEngine, self explanatory. When an instance of Gravity is made in entityEngine, it passes itself (this) into it, so that gravity can have access to entityEngine.Entities (a dictionary of all planet objects)) Gravity.cs namespace ExplorationEngine { public class Gravity { private EntityEngine entityEngine; private Vector2 Force; private Vector2 VecForce; private float distance; private float mult; public Gravity(EntityEngine e) { entityEngine = e; } public void Update() { //First loop foreach (KeyValuePair<string, Entity> e in entityEngine.Entities) { //Reset the force vector Force = new Vector2(); //Second loop foreach (KeyValuePair<string, Entity> e2 in entityEngine.Entities) { //Make sure the second value is not the current value from the first loop if (e2.Value != e.Value ) { //Find the distance between the two objects. Because Fg = G * ((M1 * M2) / r^2), using Vector2.Distance() and then squaring it //is pointless and inefficient because distance uses a sqrt, squaring the result simple cancels that sqrt. distance = Vector2.DistanceSquared(e2.Value.Position, e.Value.Position); //This makes sure that two planets do not attract eachother if they are touching, completely unnecessary when I add collision, //For now it just makes it so that the planets are not glitchy, performance is not significantly improved by removing this IF if (Math.Sqrt(distance) > (e.Value.Texture.Width / 2 + e2.Value.Texture.Width / 2)) { //Calculate the magnitude of Fg (I'm using my own gravitational constant (G) for the sake of time (I know it's 1 at the moment, but I've been changing it) mult = 1.0f * ((e.Value.Mass * e2.Value.Mass) / distance); //Calculate the direction of the force, simply subtracting the positions and normalizing works, this fixes diagonal vectors //from having a larger value, and basically makes VecForce a direction. VecForce = e2.Value.Position - e.Value.Position; VecForce.Normalize(); //Add the vector for each planet in the second loop to a force var. Force = Vector2.Add(Force, VecForce * mult); //I have tried Force += VecForce * mult, and have not noticed much of an increase in speed. } } } //Add that force to the first loop's planet's position (later on I'll instead add to acceleration, to account for inertia) e.Value.Position += Force; } } } } I have used various tips (about gravity optimizing, not threading) from THIS question (that I made yesterday). I've made this gravity method (Gravity.Update) as efficient as I know how to make it. This O(N^2) algorithm still seems to be eating up all of my CPU power though. Here is a LINK (google drive, go to File download, keep .Exe with the content folder, you will need XNA Framework 4.0 Redist. if you don't already have it) to the current version of my game. Left click makes a planet, right click removes the last planet. Mouse moves the camera, scroll wheel zooms in and out. Watch the FPS and Planet Count to see what I mean about performance issues past 70 planets. (ALL 70 planets must be moving, I've had 100 stationary planets and only 5 or so moving ones while still having 300 fps, the issue arises when 70+ are moving around) After 70 planets are made, performance tanks exponentially. With < 70 planets, I get 330 fps (I have it capped at 300). At 90 planets, the FPS is about 2, more than that and it sticks around at 0 FPS. Strangely enough, when all planets are stationary, the FPS climbs back up to around 300, but as soon as something moves, it goes right back down to what it was, I have no systems in place to make this happen, it just does. I considered multithreading, but that previous question I asked taught me a thing or two, and I see now that that's not a viable option. I've also thought maybe I could do the calculations on my GPU instead, though I don't think it should be necessary. I also do not know how to do this, it is not a simple concept and I want to avoid it unless someone knows a really noob friendly simple way to do it that will work for an n-body gravity calculation. (I have an NVidia gtx 660) Lastly I've considered using a quadtree type system. (Barnes Hut simulation) I've been told (in the previous question) that this is a good method that is commonly used, and it seems logical and straightforward, however the implementation is way over my head and I haven't found a good tutorial for C# yet that explains it in a way I can understand, or uses code I can eventually figure out. So my question is this: How can I make my gravity method more efficient, allowing me to use more than 100 objects (I can render 1000 planets with constant 300+ FPS without gravity calculations), and if I can't do much to improve performance (including some kind of quadtree system), could I use my GPU to do the calculations?

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• SEO Training - How to Get the Basics Right

  I guess it's time to cut the crud and get down to the real meat of what this SEO stuff is about. Time for someone to explain how to do it yourself in a way that won't have you going around in circles thinking it's all a bit of a dark art. This, then, is that article and I am that person who will tell you in nice easy terms how to get your site all 'SEO' friendly in a simple way. No jargon allowed - it's for newbies only!

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• How do I change the date format in Gnome 3 shell?

  - by James Haigh

  I want to change the date/time format on the top panel to a format close to RFC 3339 / ISO 8601, like one of these: %F %T ? 2013-06-24 16:13:00 %F %a %T ? 2013-06-24 Mon 16:13:00 %A %F %T ? Monday 2013-06-24 16:13:00 I know Unity has a preference somewhere hidden away in dconf, this is how I did it in Unity, but I can't find such a preference for Gnome 3 shell. Preferably, I'd also like to set one of these as my system-wide date/time locale preference.

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• How to cleanly add after-the-fact commits from the same feature into git tree

  - by Dennis

  I am one of two developers on a system. I make most of the commits at this time period. My current git workflow is as such: there is master branch only (no develop/release) I make a new branch when I want to do a feature, do lots of commits, and then when I'm done, I merge that branch back into master, and usually push it to remote. ...except, I am usually not done. I often come back to alter one thing or another and every time I think it is done, but it can be 3-4 commits before I am really done and move onto something else. Problem The problem I have now is that .. my feature branch tree is merged and pushed into master and remote master, and then I realize that I am not really done with that feature, as in I have finishing touches I want to add, where finishing touches may be cosmetic only, or may be significant, but they still belong to that one feature I just worked on. What I do now Currently, when I have extra after-the-fact commits like this, I solve this problem by rolling back my merge, and re-merging my feature branch into master with my new commits, and I do that so that git tree looks clean. One clean feature branch branched out of master and merged back into it. I then push --force my changes to origin, since my origin doesn't see much traffic at the moment, so I can almost count that things will be safe, or I can even talk to other dev if I have to coordinate. But I know it is not a good way to do this in general, as it rewrites what others may have already pulled, causing potential issues. And it did happen even with my dev, where git had to do an extra weird merge when our trees diverged. Other ways to solve this which I deem to be not so great Next best way is to just make those extra commits to the master branch directly, be it fast-forward merge, or not. It doesn't make the tree look as pretty as in my current way I'm solving this, but then it's not rewriting history. Yet another way is to wait. Maybe wait 24 hours and not push things to origin. That way I can rewrite things as I see fit. The con of this approach is time wasted waiting, when people may be waiting for a fix now. Yet another way is to make a "new" feature branch every time I realize I need to fix something extra. I may end up with things like feature-branch feature-branch-html-fix, feature-branch-checkbox-fix, and so on, kind of polluting the git tree somewhat. Is there a way to manage what I am trying to do without the drawbacks I described? I'm going for clean-looking history here, but maybe I need to drop this goal, if technically it is not a possibility.

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• Phone complains that identical GLSL struct definition differs in vert/frag programs

  - by stephelton

  When I provide the following struct definition in linked frag and vert shaders, my phone (Samsung Vibrant / Android 2.2) complains that the definition differs. struct Light { mediump vec3 _position; lowp vec4 _ambient; lowp vec4 _diffuse; lowp vec4 _specular; bool _isDirectional; mediump vec3 _attenuation; // constant, linear, and quadratic components }; uniform Light u_light; I know the struct is identical because its included from another file. These shaders work on a linux implementation and on my Android 3.0 tablet. Both shaders declare "precision mediump float;" The exact error is: Uniform variable u_light type/precision does not match in vertex and fragment shader Am I doing anything wrong here, or is my phone's implementation broken? Any advice (other than file a bug report?)

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• What are the methods to estimate source code value?

  - by Antoine

  I've been working on some project on my free time for the past few months. Recently I've been approached by friends to build a startup, and this source code would be very valueable to us. As a co-founder, this code could count for something in the company's capital, and be exchanged for shares. But how can you estimate its value? Do you just multiply industry-standard wqges by the time I spent on it, or are there other methods?

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• A Look at Keyword Search Optimization

  With the great influence of the Internet on a growing number of consumers these days, online marketing is now considered one of the best, if not the best, way to promote a business. This strategy offers greater possibilities for a business to be known enough to generate increasing revenues. Pinpointing the exact right techniques, however, will take some brainstorming which could be a critical stage because it requires a lot of time for marketers to determine on which tricks are, indeed, going to work and which will be a waste of time.

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• Java best practice Interface - subclasses and constants

  - by Taiko

  In the case where a couple of classes implements an interface, and those classes have a couple of constants in common (but no functions), were should I put this constant ? I've had this problem a couple of times. I have this interface : DataFromSensors that I use to hide the implementations of several sub classes like DataFromHeartRateMonitor DataFromGps etc... For some reason, those classes uses the same constants. And there's nowere else in the code were it is used. My question is, were should I put those constants ? Not in the interface, because it has nothing to do with my API Not in a static Constants class, because I'm trying to avoid those Not in a common abstract class, that would stand between the interface and the subclasses, because I have no functions in common, only a couple of constants (TIMEOUT_DURATION, UUID, those kind of things) I've read best practice for constants and interface to define constants but they don't really answer my question. Thanks !

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• I Have No Complaints About SEO

  There are many people out there in the worldwide market who say that SEO is an expensive and time taking technique to get the return on investment but the fact of the matter is that there is no match of search engine optimization in the global market today. The most wonderful thing about this web marketing technique is that it brings an organic traffic to your website immediately. On the other hand, it ensures higher search engine rankings to your website within a very short span of time.

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• Create Your Website Without the Codes With the Easiest Website Building Software

  These days, people choose to have everything done instantly, especially the work processes. One cannot blame them for choosing easy and convenient ways for their everyday tasks since time has become a major concern. Most individuals try to avoid time-consuming and complicated tasks as much as possible. Online processes are not even spared.

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• Will low level programms become obsolete once the "post-performance" world arives? [closed]

  - by nbv4

  With the new iPhone 5 being as powerful as the supercomputers of the 1980s, its only a matter of time when the latest phones will be powerful enough to run a twitter-scale web application from within my pocket. When that time comes, performance will no longer be something programmers need to care about. Will low level languages still have a place? Or will everyone move to dynamic languages like Python?

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• C redevient le langage le plus utilisé devant Java et C++, d'après le classement des langages de pro

  Le C redevient le langage de programmation le plus utilisé Devant Java et le C++, d'après TIOBE Software TIOBE Software publie chaque mois son classement (le TIOBE Programming Community index) des langages de programmation. D'après cet index, pour la première fois depuis 4 ans, Java perd sa place de langage le plus populaire au profit du C qui retrouve donc le top du classement. Le C "est assez constant au fil des années, il varie entre 15% et 20% de parts de marché depuis presque 10 ans. Donc, la raison principale de cette place de numéro 1 n'est pas une progression du C, mais plutôt la baisse de son concurrent Java", explique l'analyse qui accompagne ce ...

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• How do you know when you are tired of programming in your life?

  - by medusa

  Have you ever felt that you have had enough of programming and you want to do something else in your life which hopefully doesn't include staying in front of the computer all day? Also, while thinking these you realize it's time to stop thinking and continue your code. I am going through these thoughts for some time now, do you ever feel like this and what do you do to get yourself concentrated and happy with your work?

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• How to Clear Metro Application Notifications at Log Off in Windows 8

  - by Taylor Gibb

  Sometimes in Windows 8 you may find your application notifications getting stuck from time to time, the fix to this problem is to clear the notification cache at log off, here’s how. Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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• Why doesn't file detect the mime-type of mp3 properly?

  - by Grumbel

  Something odd I recently encountered, running file --mime-type on a collection of MP3 gets the mime-time wrong a third of the time: $ for i in */*.mp3; do cat "$i"| file --mime-type -; done | sort | uniq -c 140 /dev/stdin: application/octet-stream 309 /dev/stdin: audio/mpeg There doesn't seem to be any obvious reason, as even MP3s from the same source, will sometimes fail and sometimes not. Bug, feature or anything obvious I am missing here?

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• How should I synchronize configurations and data across computers?

  - by lfaraone

  Imagine I have three Ubuntu computers home, laptop, beach-house. They all have the same version of Ubuntu, 10.04 installed, and are kept up to date from the repositories. I use f-spot, thunderbird, and google-chrome on all of the computers. Is there a way to keep the data and configuration in sync across them, without requiring constant connectivity for normal (non-synchronous) usage? For example, they should be usable without network connectivity, so something like NFS won't work. An ideal solution would not require manual action to start the syncing process.

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• Cross-Cultural Design (great video from HFI) - #usableapps #UX #L10n

  - by ultan o'broin

  Great video from HFI Animate, featuring user-centered design for emerging markets called Cross Cultural Design: Getting It Right the First Time. Cross Cultural Design: Getting It Right the First Time Apala Lahiri Chavan talks about the issues involved in designing solutions for Africa, India, China and more markets! Design for the local customer's ecosystem - and their feelings! Timely reminder of the important of global and local research in UX!

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• What's Your Web Page Speed?

  A web page speed is also referred to as the "page-load time". It is simply the amount of time that it takes for the pages of your website to load or become visible, once a user requests them.

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• 2012 EC Election Ballot open; Meet the Candidates Call tomorrow

  - by heathervc

  The JCP Executive Committee (EC) Election ballot is now open and all of the candidates' nominations materials are now available on JCP.org -- note that two new candidates were nominated late last week:  Liferay and North Sixty-One. It is shaping up to be an exciting election this year! The ratified candidates are:  Cinterion, Credit Suisse, Fujitsu and HP.The elected candidates are (9 candidates, 2 open seats):  Cisco Systems, CloudBees, Giuseppe Dell'Abate, Liferay, London Java Community, MoroccoJUG, North Sixty-One, Software AG, and Zero Turnaround. Tomorrow, 18 October, we will hold an open teleconference for the Java Community to meet the candidates and ask questions regarding their nomination.  We hope you will be able to participate in the call.  Should the time be inconvenient, a recording will be made available for download, and candidate questions may be posted on this blog entry or sent to [email protected]. Topic: Meet the EC Candidates Date: Thursday, October 18, 2012 Time: 9:30 am, Pacific Daylight Time (San Francisco, GMT-07:00) Meeting Number: 807 818 225 Meeting Password: MeetEC ------------------------------------------------------- To join the online meeting (Now from mobile devices) ------------------------------------------------------- 1. Go to https://jcp.webex.com/jcp/j.php?ED=186721592&UID=0&PW=NMmUzNjY5ZTMw&RT=MiM0 2. If requested, enter your name and email address. 3. If a password is required, enter the meeting password: MeetEC 4. Click "Join". To view in other time zones or languages, please click the link: https://jcp.webex.com/jcp/j.php?ED=186721592&UID=0&PW=NMmUzNjY5ZTMw&ORT=MiM0 ------------------------------------------------------- To join the audio conference only -------------------------------------------------------     +1 (866) 682-4770     Outside the US: global access numbers  https://www.intercallonline.com/portlets/scheduling/viewNumbers/listNumbersByCode.do?confCode=6279803 or +1 (408) 774-4073     Conference code: 9454597     Security code: JCPEC (52732)------------------------------------------------------- For assistance ------------------------------------------------------- 1. Go to https://jcp.webex.com/jcp/mc 2. On the left navigation bar, click "Support".

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• Is it a good idea to make a game for one aspect ratio and arbitrary screen resolution?

  - by Mimars

  After several very small games I have decided to make something more standalone (2D) and playable. However, I have met the problem of every game that is going to be played in more screen resolutions. Basically, after some research I see that there are several solutions. This seems to be the simplest one: Let's say I define a constant aspect ratio for the game (16:9) and the whole game will be created for a resolution 1680 x 1050. The game will be rendered in this resolution and then I will be able to scale the render to match the player's display resolution. Therefore the game might be playable on almost any resolution, while it would keep the aspect ratio. So, if the game was run on 4:3 display, the top and the bottom of the display would be filled with black color. It seems easy, but my question is - Is this a good approach for a simple game? The game will be simple, but I want to maintain high quality.

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• Should the test and the fix be written by different people?

  - by Nutel

  There is a common practice in TDD to write a test before fix to avoid regression and simplify fixing. I just wonder what if the test and fix will be written by different people, total spent time will be almost the same but as now three people will think about possible failures (+tester) we increase probability that fix will cover all possible failure scenarios. Does this practice make sense or it will just waste additional time needed for one more person to familiarize with bug?

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• Search Engine Optimization - The Five Factors Search Engines Use to Rank Websites

  At the end of the day, SEO requires a lot of extremely specialized knowledge, time, and attention - on an ongoing basis. But because a SEO effort can give a website's rankings a dramatic boost in the search results - and there is a significant connection between search engine ranking and search referral traffic - it is well worth doing whatever it takes to develop the knowledge and to be able to invest the time and attention.

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