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• Cocos2d v2.0 and OpenGL 2.0/1.0: where to start

  - by mm24

  I started developing my very first game 3 months ago using Cocos2d 2.0 for iPhone. I am now in the stage where I'd like to add some cool effects to the bullets and some special weapons (see my waveforms question here). I got a good answer in the cocos2d-iphone forum (see this one). Unfortunately I am a bit paralized now. I don't know if I will be overdoing by learning OpengGL 2.0 or if I should just stick ot the old 1.0. There is a good intro on various tutorial's written in Steffen Itterheims blog (see this post). I would like to add to my game: a blur effect to the bullets (here is a tutorial for OpenGL 1.0) a waveform (see above) some realistic water ripples (here is a nice sample code) So now, given that I don't want to overdo things but at the same time I want to achieve those effects, from where should I start? Should I discard the OpenGL 1.0 tutorials? OR should I use only OpenGL 1.0 code? How can I avoid confusion? I mean, it seems that the compiler recognizes both, but that there are some conflictual calls in some circumnstances, I am fairly sure this has some explanation, is there some reference to this somewhere?

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• Mix10 is in history, Windows Phone 7 is here!

  MIX10was really a fantastic conference for Telerik! We had great talks, many customers stopped by our booth and we've got a lot of great feedback for our Silverlight Controls. Thank you for stopping by and sharing your opinion! So now, that the MIX is over, there is one question left: What Telerik will develop for theWindows Phone 7? We had this question on the booth over and over again and it is no doubt that the WP7 development is a hot topic now. All we can sayat this momentis that Yes, we are looking into this and we actually have some of our controls already partially working with WP7 internally :) You know that the Silverlight version for WP7 is Silverlight 3 and it has some very good additions over it in order to support the phone hardware - like webcam, mic, accelerometer, etc. If you missed the conference and the sessions- here is a list of videos thatwill get you started: Building Windows Phone Applications with Silverlight, Part 1 Mike Harsh Building Windows Phone Applications with Silverlight, Part 2 Peter Torr The good thing isthat our controls will needvery few tweaks in order to be *compiled* against the WP7 Silverlight runtime. But, the more interesting part is actually what are the scenarios that our controls will be used in. How different they will be from the desktop version of the SL? This is where we need your feedback - drop as a line and let us know what are your expectations in this area. Do you need something specific, a feature or a new control that you like to use, or maybe you have a specific scenario that you want to share. Nowthe ball is in your hands - write on the forums, send us a ticket, or just leave your comment on WP7 developmentbelow! 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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• Class Design - Space Simulator

  - by Peteyslatts

  I have pretty much taught myself everything I know about programming, so while I know how to teach myself (books, internet and reading API's), I'm finding that there hasn't been a whole lot in the way of good programming. So I have two questions: First the broad one: Does anyone have suggestions as to sources for learning about good programming habits and techniques? I'd prefer it if the resource wasn't a 5000 page tome. The more I can read it in installments the better. More specifically: I am finishing up learning the basics of XNA and I want to create a space simulator to test my knowledge. This isn't a full scale simulator, but just something that covers everything I learned. It's also going to be modular so I can build on it, after I get the basics down. One of the early features I want to implement is AI. And I want to take this into account as I'm designing my classes so I can minimize rewriting code. So my question: How should I design ship classes so that both the player and AI can use them? The only idea I have so far is: Create a ship class that contains stats, models, textures, collision data etc. The player and AI would then have the data for position, rotation, health, etc and would base their status off of the ship stats.

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• Tomcat + Spring + CI workflow

  - by ex3v

  We're starting our very first project with Spring and java web stack. This project will be mainly about rewriting quite large ERP/CRM from Zend Framework to Java. Important factor in my question is that I come from php territory, where things (in terms of quality) tend to look different than in java world. Fatcs: there will be 2-3 developers, at least one of developers uses Windows, rest uses Linux, there is one remote linux-based machine, which should handle test and production instances, after struggling with buggy legacy code, we want to introduce good programming and development practices (CI, tests, clean code and so on) client: internal, frequent business logic changes, scrum, daily deployments What I want to achieve is good workflow on as many development stages as possible (coding - commiting - testing - deploying). The problem is that I've never done this before, so I don't know what are best practices to do this. What I have so far is: developers code locally, there is vagrant instance on every development machine, managed by puppet. It contains the same linux, jenkins and tomcat versions as production machine, while coding, developer deploys to vagrant machine, after local merge to test branch, jenkins on vagrant handles tests, when everything is fine, developer pushes commits and merges jenkins on remote machine pulls commit from test branch, runs tests and so on, if everything looks green, jenkins deploys to test tomcat instance Deployment to production is manual (altough it can be done using helping scripts) when business logic is tested by other divisions and everything looks fine to client. Now, the real question: does above make any sense? Things that I'm not sure about: Remote machine: won't there be any problems with two (or even three, as jenkins might need one) instances of same app on tomcat? Using vagrant to develop on php environment is just vise. Isn't this overkill while using Tomcat? I mean, is there higher probability that tomcat will act the same on every machine? Is there sense of having local jenkins on vagrant?

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• Scripting language for filling out web form

  - by ityler22

  I have a job as an intern at a technology company, I was given the unfortunate job of performing some data entry into our web management system. The information entered into the web form is stored in a MySQL DB. Upon receiving the data I realized I would have to submit this online form about 1000 different times all consisting of about 10 different text fields / check boxes per form. (So in other words, would be completely mind numbing and be a ridiculous waste of time and resources, or so I thought...) Having used databases a good bit prior to this, my immediate reaction was to just write a short MySQL script to bulk import all of the data, especially since it was already presented to me in an excel spreadsheet ready to go. Thought it may have been some sort of a test since it seemed too obvious. I wrote the script which consisted of about 10 lines of code but was then informed I couldn't be trusted with MySQL Admin privileges to run said script. So my next thought would be to write a script to just enter the information through the web form (Which will take ten times longer but it's what I have to) Being unfamiliar with scripting of this nature (seems like I would need something similar to a bot, but the good kind) I was unsure of how to proceed to do this. Is there a preferred language to use to enter the data i have into the web form I do have access to? I'm not particularly looking for this to be done for me by any means just a nice point in the right direction as far as what scripting language to use and how to pair that with the data I have that needs to be entered. Thanks for the help/ valuable input! EDIT: Is there a way to perform this using perl without having access to place any files on the server? Would I be able to run some Javascript loops to pull the data out of .csv or just a .txt format with line delimiters and insert it into the web form?

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• Estimate angle to launch missile, maths question

  - by Jonathan

  I've been working on this for an hour or two now and my maths really isn't my strong suit which is definitely not a good thing for a game programmer but that shouldn't stop me enjoying a hobby surely? After a few failed attempts I was hoping someone else out there could help so here's the situation. I'm trying to implement a bit of faked intelligence when the A.I fires it's missiles at a target in a 2D game world. By predicting the likely position the target will be in given it's current velocity and the time it will take the missile to reach it's target. I created an image to demonstrate my thinking: http://i.imgur.com/SFmU3.png which also contains the logic I use for accelerating the missile after launch. The ship that fires the missile can fire within a total of 40 degree angle, 20 either side of itself, but this could likely become variable. My current attempt was to break the space between the two lines into segments which match the targets width. Then calculate the time it would take the missile to get to that location using the formula. So for each iteration of this we total up the values and that tells us the distance travelled, ad it would then just need compared to distance to the segment. startVelocity * ((startVelocity * acceleration)^(currentframe-1) So for example. If we start at a velocity of 1f/frame with an acceleration of 0.1f the formula, at frame 4, would be 1 * (1.1^3) = 1.331 But I quickly realized I was getting lost when trying to put this into practice. Does this seem like a correct starting point or am I going completely the wrong way about it? Any pointers would help me greatly. Maths really isn't my strong suit so I get easily lost in these matters and don't even really know a good phrase to search for with this. So I guess in summary my question is more about the correct way to approach this problem and any additional code samples on top of that would be great but I'm not averse to working out the complete code from helpful pointers.

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• Is there a cheaper non-express non-student, non-msdn version of Visual Studio 2010 that supports plugins in the US than the $710 Professional Edition?

  - by Justin Dearing

  I've never actually purchased a copy of Visual Studio myself. SharpDevelop and Express edition have always been good enough for my personal use, and my employers always furnished me with the IDEs I needed to serve them. However, I'm thinking of actually paying for a copy for my personal laptop. I need this mainly so I can open solutions that contain web projects. So my question is: Is there an edition cheaper than the $710 Pro edition on Amazon that will do what I need: http://www.amazon.com/Microsoft-C5E-00521-Visual-Studio-Professional/dp/B0038KTO8S/ref=sr_1_2?ie=UTF8&qid=1287456230&sr=8-2 ? What I need is defined as: Open up a solution with C#, Web App, VB.NET, and Web Projects. Install addins like resharper, testdriven.net, etc, SCM plugins, etc. Some level of db project support. At least to be able to open a dbproj. I only need that for SCM hooks. SSMS and SQLCMD are good enough for actually editing databases. Ability to install F#, IronPython, IronRuby etc. Now naturally I'm a fairly intelligent resourceful person so I realize I can get Visual Studio in a questionable manner. Thats not what I'm looking to do. I want a legal copy, I don't want a student copy, or an MSDN copy. I want a real copy, I just want to make sure I get the cheapest edition that serves my needs.

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• Using the Java SE 8 Date Time API with JPA 2.1

  - by reza_rahman

  Most of you are hopefully aware of the new Date Time API included in Java SE 8. If you are not, you should check them out right now using the Java Tutorial Trail dedicated to the topic. It is a significantly leap forward in processing temporal data in Java. For those who already use Joda-Time the changes will look very familiar - very simplistically speaking the Java SE 8 feature is basically Joda-Time standardized. Quite naturally you will likely want to use the new Date Time APIs in your JPA domain model to better represent temporal data. The problem is that JPA 2.1 will not support the new API out of the box. So what are you to do? Fortunately you can make use of fairly simple JPA 2.1 Type Converters to use the Date Time API in your JPA domain classes. Steven Gertiser shows you how to do it in an extremely well written blog entry. Besides explaining the problem and the solution the entry is actually very good for getting a better understanding of JPA 2.1 Type Converters as well. I think such a set of converters may be a good fit for Apache DeltaSpike as a Java EE 7 extension? In case you are wondering about Java SE 8 support in the JPA specification itself, Nick Williams has already entered an excellent, well researched JIRA entry asking for such support in a future version of the JPA specification that's well worth looking at. Another possibility of course is for JPA providers to start supporting the Date Time API natively before anything is formalized in the specification. What do you think?

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• Part 4: Development Standards or How to share

  - by volker.eckardt(at)oracle.com

  Although we usually introduce the custom development part in EBS projects as “a small piece only” and “we will avoid as best as possible”, the development effort can be enormous and should therefore be well addressed by project standards. Any additional solution or additional software tool or product shall influence the custom development rules (by adding, removing or replacing sections). It is very common in EBS projects to create a so called “MD.030 Development Standards” document and put everything what’s related to development conventions into it. This document gets approval and will be shared among all developers. Later, additional sections have to be added, and usually the development lead is responsible for doing this. However, sometimes used development techniques are not documented properly, and therefore the development solutions deviate from each other, or from the initially agreed standards. My advice would be the following: keep the MD.030 as a base document, and add a Wiki on top. The “Development Wiki” covers the following: Collect input from every developer without updating the MD.030 directly Collect additional topics that might need further specification Allow a discussion about such topics by reviewing/updating the wiki directly Add also decisions or open questions right into it. In one of my own projects we were using this “Developer Wiki” quite extensive, and my experience is very positive. We had different sections in it, good cross references, but also additional material like code templates, links to external web pages etc. By using this wiki, the development standards became “owned” by the right group of people, the developers. They recognized that information sharing can improve the overall development quality, but will also reduce the workload on individuals. Finally, the wiki was much more accurate and helpful for the daily development work than our initial MD.030, and we all decided to retire the document completely. Summary: Information sharing in the development area is very important! The usual “MD.030 Development Standards“ is a good starting point, but should be combined with a “Development Wiki”, allowing everyone to address and discuss necessary improvements. A well-structured Wiki can replace the document in some sections completely. Side Note: The corresponding task in Oracle OUM (Oracle Unified Method) is DS.050 ‘Determine Design and Build Standards’ Volker

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• What is the "default" software license?

  - by Tesserex

  If I release some code and binaries, but I don't include any license at all with it, what are the legal terms that apply by default (in the US, where I am). I know that I automatically have copyright without doing anything, but what restrictions are there on it? If I upload my code to github and announce it as a free download / contribute at will, then are people allowed to modify and close source my work? I haven't said that they cannot, as a GPL would, but I don't feel that it would by default be acceptable to steal my work either. So what can and cannot people do with code that is freely available, but has absolutely no licensing terms attached? By the way, I know that it would be a good idea for me to pick a license and apply it to my code soon, but I'm still curious about this. Edit Thanks! So it looks like the consensus is that it starts out very restricted, and then my actions imply any further rights. If I just put software on my website with no security, it would be an infringement to download it. If I post a link to that download on a forum, then that would implicitly give permission to use it for free, but not distribute it or its derivatives (but you can modify it for your own use). If I put it on GitHub, then it is conveyed as FOSS. Again, this is probably not codified exactly in law but may be enough to be defensible in court. It's still a good idea to post a complete license to be safe.

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• Be Prepared: Technology Trends Converge and Disrupt

  - by Richard Lefebvre

  Cloud. Big data. Mobile. Social media: these mega trends in technology have had a profound impact on our lives. And now according to SVP Ravi Puri from North America Oracle Consulting Services, these trends are starting to converge and will affect us even more. His article, “Cloud, Analytics, Mobile, And Social: Convergence Will Bring Even More Disruption” appeared in Forbes on June 6. For example, mobile and social are causing huge changes in the business world. Big data and cloud are coming together to help us with deep analytical insights. And much more. These convergences are causing another wave of disruption, which can drive all kinds of improvements in such things as customer satisfaction, competitive advantage, and growth. But, according to Puri, companies need to be prepared. In this article, Puri urges companies to get out in front of the new innovations. H3 gives good directions on how to do so to accelerate time to value and minimize risk. The post is a good thought leadership piece to pass on to your customers.

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• Being rocked...

  - by ZacHarlan

  After almost four and half years, I finally escaped from the world of telemarketing.     I'm now at a place that writes really good code, values testing, does routine code reviews, collaborates with each other so continuously and effectively somebody should make a documentary about it!   Today alone, I had two really smart and well respected developers go line by line through my code and show me how to make it better.  Seriously, people pay really good money for something like this and they don't get near the quality of feedback as I got!     +1 for me finally getting to a point in my career where i get to work with some of the best of the best in the software world!   I've been rocked by the fact that places like this actually exist.     I've been Rocked by the sheer size, complexity and simplicity of our website.     Most importantly I've been ROCKED by the fact that this many smart people check their egos at the door, gel together and look for ways to make software better than how they found it.  This is how to grow a business with tech... hire great people and watch them go!   Seriously, bravo.

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• How do you save/export changes made in Firebug?

  - by blunders

  Using Firebug to edit CSS, how do I save/export changes made to the CSS? TOOLS: Firefox, Firebug MAJOR UPDATE: If you know of a way to lock the forward/back/refresh on a FireFox tab, please let me know. Otherwise, I've given up on using FireBug/FireDiff as an IDE for CSS, it's nice, but lol... press backspace at the wrong time and ALL your work is gone... funny. So, really like the browser highlighting to CSS/HTML in Firebug. Know any good CSS editors that do this? Really had hope FireBug would work, but for now only see it as being good for ad-hoc inspection and test; meaning using it for what it's made for. UPDATES: @Lèse majesté: Just as an update, "Web Developer add-on" does let you edit CSS, but it does not let you edit/save CSS changes made by Firebug. Meaning you use Firebug to ID and maybe test changes, but it does not let you save the changes from Firebug. Here's a "how to" covering how to use them together: FF + FB + WD @Lèse majesté: Still playing around with FireDiff. It works okay, found one bug already (although I'm just working around it), and there's no "how to" I've been able to find, so I'm just trying every feature and clicking around... (for example, to export a diff you must be over the last item in the list, right click, and select as "Save Diff". The ".diff" is just a text file, no idea why at this point the ext is .diff.

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• How to effectively design a piece of software

  - by ti83plus

  Im a compsci student and ive got some experience in various languages and paradigms c/java/python/ruby/html/css/scheme/sql/asp(classic). I realise that i want to have some software in my portfolio for future job hunting even tho i still have 2 years left of my education. Ive got a pretty good idea of what i want to make, its a webapp. Most shops around here are either .net or java and since i know java best and dont have access to ms developer tools im thinking i should go with java. Even tho i feel i know the principles of OOP pretty good ive got no clue how to go from my idea to a working solution. Where can i access information about designing the underlying architechture of my solution? Also i would like to know what other technologies i should train on, my current list includes javascript(and possibly a javascript library) some sort of java web framework tips are appreciated. I would like to add support for android/iphone apps in the future and this is something i have to take into account when designing the app. I have done a course on software engineering but i found this to be more centered around project management ideas then the actual design and implementation. So i would like tips on technologies i should focus on to get the most out of my time without the massive overhead of huge config processes but at the same time keep my project viable in a business sense, so that i use technologies that are relevant for business (java developer jobs). And i would also like tips on where i can learn more about the design process around a software project, i will be working mostly alone. But i find the approach ive used up until now (start coding and figure it out as you go) wont suffice.

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• Moving all UI logic to Client Side?

  - by Mag20

  Our team originally consisted of mostly server side developers with minimum expertise in Javascript. In ASP.NET we used to write a lot of UI logic in code-behind or more recently through controllers in MVC. A little while ago 2 high level client side developers joined our team. They can do in HTMl/CSS/Javascript pretty much anything that we could previously do with server-side code and server-side web controls: Show/hide controls Do validation Control AJAX refreshing So I started to think that maybe it would be more efficient to just create a high level API around our business logic, kinda like Amazon Fulfillment API: http://docs.amazonwebservices.com/fws/latest/APIReference/, so that client side developers would fully take over the UI, while server side developers would only concentrate on business logic. So for ordering system you would have a high level API like: OrderService.asmx CreateOrderResponse CreateOrder(CreateOrderRequest) AddOrderItem AddPayment - SubmitPayment - GetOrderByID FindOrdersByCriteria ... There would be JSON/REST access to API, so it would be easy to consume from client-side UI. We could use this API for both internal UI development and also for 3-rd parties to create their own applications. With advances in Javascript and availability of good client side developers, is it a good time to get rid of code-behind/controllers and just concentrate on developing high level APIs (ala Amazon) that client side developers can consume?

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• Read Oracle Certification Program's December 2012 E-Magazine now!

  - by Harold Green

  Hello Everyone, The big news in this edition of our Oracle Certification E-Magazine is related to a change in the way that exam results are provided at the end of the test (using our CertView tool). This significant process change for the Oracle program sets the stage for tighter integration of candidate information and exam/certifcation results. Additionally, it helps give every certification holder access to important tools available in CertView. The new process was implemented in November and so far it is going very well. Much of the success of this new initiative is due to you (following the new process)! We are continuing to work to expand the functionality of CertView to better help you use your certification as a tool to help improve your career. Also in this issue of the E-Magazine, we are announcing several new offerings. We have a new SQL Tuning certification as well as a new Exam Preparation Seminar. We have continued to release new Exam Preparation Seminars and Exam Preparation Seminar Value Packages and we are receiving good feedback. We hope that you will consider employing one of these seminars to help you prepare for your next certification exam. They are now even available on iPad! READ THE DECEMBER 2012 EDITION HERE Thank you and good luck! Paul Sorensen Sr. Director, Global Certification Programs

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• share distribution question

  - by facebook-100000781341887

  Hi, I just developed a facebook game(mifia like), but the graphic I make is not good, because it is reference with some existing photo, trace with AI, and coloring it. Therefore, I invite my friend to join me, he is a graphic designer, own a company with his friend (I know both of them), for the share, I expect at least 70% for me, and at most 30% for them (both of them want to join). Therefore, they give me a counter offer, 60% for me and 40% for them, of course, I feel their counter offer is unacceptable because they only build the image in part time, and all the other work just like coding, webhosting...etc, is what I do in full time. Why they said they worth 40% is that they will make a good graphic, they can provide a advertise channel(on local magazine), etc... Actually, I don't think the game need advertisement on local magazine because the game is not target for local... Please give me some comments on this issue(is the share fair? what is the importance of the image of the game, is it worth more than 30%), or can anyone share the experience on this. Thanks in advance.

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• Poor backlink profile - search rankings not updated for 2+ months

  - by fistameeny

  I am carrying out some work on a website that is a PR2 with a few good quality, relevant backlinks (PR4-6). It has a presence on Twitter that is updated regularly, a Google Places listing, and listings on some decent directories (Qype etc). The site was rebuilt into Drupal 7 two months ago, with all the basics done - URL rewriting, XML Sitemap submitted to Google, and most importantly, good quality, structured content. I've noticed that Google is still showing "old" URL's from the previous version of the site that was ditched 8 weeks ago. I think the site may be penalised under the Penguin update, as a previous SEO company created many low quality links from link farms/directories. My question is what the correct way to deal with this is. Bing Webmaster Tools can "disavow" links, and I guess I can attempt to contact the link farms to have them removed. I've already submitted a request to Google to request that we have the penalty removed as we're trying to tidy up a bad history. We submit updated sitemaps to Google and Bing daily, and have built some further decent quality, relevant links. Is there anything further I can do?

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• GeForce and Radeon: what is present condition of opensource and proprietary drivers?

  - by Septagram

  So, it'm about to buy a fresh videocard. Since I do most of my stuff on Linux, I wonder how well will either videocard perform. I recently had a good experience with GeForce 6600 with proprietary drivers and a less than satisfactory experience with Radeon 9000 a while ago. From my experience, proprietary drivers for GeForce used to work very well, while proprietary drivers for Radeon failed miserably. And opensource drivers were sloooow. A few months ago I found out that ATI opened their specifications, and a work on fully featured opensource driver is in progress. I prefer to use free software whenever possible, with the exception of games, so, if that driver is fast enough, feature-rich enough and reliable enough I'd very much like to try it out. I wish I could say that if I can just to basic things, like watch video, heavily use compiz and work with simple applications, this may be enough. I do most of my gaming under Windows anyway. However, there is a good chance I'll go into indie game development in a few months fulltime, so it should also be able to run not-so-very-demanding games (say Nexuiz). But if it isn't, I'd like to know, what to expect from proprietary drivers. Do recent proprietary drivers from NVIDIA and ATI work well? Are ATI drivers just as easy to install on Ubuntu as are NVIDIA drivers?

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• Transitioning from Internal to Public Speaking

  - by TJB

  For whatever reason, I've always enjoyed giving presentations. As a developer, I've grown from giving the rare presentation when asked to frequently doing 'brown bag' talks and other presentations on new technology, projects etc. I'd like to expand as a presenter and start giving talks in public, outside of just my workplace, and I'm looking for tips on how to get there. At a high level, I'd love to know a good path to take & useful tips to help me grow from just giving internal talks to my group (10-20 people) to eventually be a presenter at medium-large sized conferences. Here are some specific questions, but I will take any advice you can offer: 1. How much experience do I need to speak at user groups etc? I've been in industry for around 5 years, which pales in comparison to most speakers that I normally see. 2. What is a good venue for my 1st public talk? 3. What surprises can I expect when transistioning from speaking to a small group of friends to presenting in public to strangers? I live in southern California and my background is mostly .net / web, so if you have any specific user group / venues those are also greatly appreciated.

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• Cannot Boot, How to recover

  - by Kendor

  Am running 11.10 64-bit with Gnome-shell. Something happened late Friday whereby my machine never gets to the login screen. I do get to an Ubuntu splash logo, after that I get a text screen that it hangs on. The screen is referring to issues with mounting various network resources, including VMWare and also some references to my NAS that are in fstab. If I hit "esc" I can get to the GRUB menu and into recovery console. If I try to do a file system check, I run into a similar error screen that I see when trying to boot normally. A possible clue here is that during my last good session I made some mods to the /etc/hosts file to reference another system which I'm connecting to with Synergy. I don't believe I have hardware issues as I'm able to boot properly with a Live USB and connect to my network/Internet. A few more tidbits. I have regular Dejadups backups on my NAS. I have a good Clonezilla whole drive image which is 4-6 weeks old.. My home is encrypted. I thought I'd try blowing away my hosts file via live USB, but when I mounted the hard drive everything was read-only and I couldn't figure out how to replace it. P.S. I logged in via CLI and modded the host file to remove the entry I'd made, to no avail. System continue to gets stuck on the following: CIFS VFS: default security mechanism requested. The default security mechanism will be upgraded from ntlm to ntlmv2 in kernel version 3.1s Would love some sober advice on how to attack this.

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• Example of DOD design

  - by Jeffrey

  I can't seem to find a nice explanation of the Data Oriented Design for a generic zombie game (it's just an example, pretty common example). Could you make an example of the Data Oriented Design on creating a generic zombie class? Is the following good? Zombie list class: class ZombieList { GLuint vbo; // generic zombie vertex model std::vector<color>; // object default color std::vector<texture>; // objects textures std::vector<vector3D>; // objects positions public: unsigned int create(); // return object id void move(unsigned int objId, vector3D offset); void rotate(unsigned int objId, float angle); void setColor(unsigned int objId, color c); void setPosition(unsigned int objId, color c); void setTexture(unsigned int, unsigned int); ... void update(Player*); // move towards player, attack if near } Example: Player p; Zombielist zl; unsigned int first = zl.create(); zl.setPosition(first, vector3D(50, 50)); zl.setTexture(first, texture("zombie1.png")); ... while (running) { // main loop ... zl.update(&p); zl.draw(); // draw every zombie } Or would creating a generic World container that contains every action from bite(zombieId, playerId) to moveTo(playerId, vector) to createPlayer() to shoot(playerId, vector) to face(radians)/face(vector); and contains: std::vector<zombie> std::vector<player> ... std::vector<mapchunk> ... std::vector<vbobufferid> player_run_animation; ... be a good example? Whats the proper way to organize a game with DOD?

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• General List of Common Programming Errors

  - by javamonkey79

  As one journey's from apprentice to journeyman to master I've noticed that one accumulates a list of best practices for things they've been bitten by. Personally, I write most of my stuff in java & SQL so my list tends to be slated towards them. I've accumulated the following: When doing list removal, always reverse iterate Avoid adding items to a list you are currently iterating on Watch out for NullPointerExceptions Now, I know there are language specific "common errors" links out there like this one. And I'm also aware of the pragmatic programmer tips, Martin Fowler's "code smells". Does anyone know of any good lists out there of things like I've listed above (re: list removal, adding items, etc). My guess is that there are some good QA folks out there that can probably throw me a bone here. I'm not looking for things the compiler can catch - I'm looking for common things that cause bugs. In the event that there isn't a list out there already then I welcome posting your own findings here. Thanks in advance!

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• Life Is Full Of Changes (Part 1)

  - by Brian Jackett

  Today will be my last day with Sogeti.  I’ve been with Sogeti USA for just over 4 years.  In that time I’ve gotten to work on some great projects, develop relationships with some brilliant and passionate people, participate in the .Net developer and SharePoint communities, and grow my skills in a number of areas I’m passionate about.     As with all good things they must come to an end though.  I’ve accepted a position with another company and will provide more details once the transition has completed.  This decision was a difficult one to make but it provides a great career opportunity on many levels.  As much as my new schedule allows I plan to continue participating in local user groups, speaking at conferences, and blogging.     Speaking of which, you may have noticed my reduced blogging activity in the past few months.  In addition to a career change I’m also in the process of moving to a new residence (only a few miles from my current residence, so I’ll still be in Columbus.)  Searching for a new place, filling out paperwork, and all of the other work associated with this move has taken away a good chunk of the time I used to devote to blogging.  Once everything gets settled out with the move and job change I’ll re-evaluate how much time I can devote to blogging.     A big thanks to Sogeti and everyone who has been so supportive over my time with them.  It’s hard to move on, but I am excited for the prospects that the future will bring.         -Frog Out

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• Combining pathfinding with global AI objectives

  - by V_Programmer

  I'm making a turn-based strategy game using Java and LibGDX. Now I want to code the AI. I haven't written the AI code yet. I've simply designed it. The AI will have two components, one focused in tactics and resource management (create troops, determine who have strategical advantage, detect important objectives, etc) and a individual component, focused in assign the work to each unit, examine its possibilites and move the unit. Now I'm facing an important problem. The map where the action take place is a grid-based map. Each terrain has different movement cost. I read about pathfinding and I think A* is a very good option to determine a good route between two points. However, imagine I have an unit with movement = 5 (i.e, it can move 5 tiles of movement cost = 1). My tactical AI has found an objective at a distance d = 20 tiles (Manhattan distance) from my unit. My problem is the following: the unit won't be able to reach the objective in one turn. So the AI will have to store a list of position and execute them in various turns. I don't know how to solve this. PS. In my unit code, I have a list called "selectionMarks" which stores all the possible places where the unit can go in this turn. This places are calculed recursively using a "getSelectionMarks" function. Any help is appreciated :D

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