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• Cheapest server per gigabit throughput [closed]

  - by nethgirb

  I'm looking for a set of servers for performance testing a network, and secondarily testing some applications on the servers. Their most important task is simply to pump out data: from an application like memcached or just dumped from a large file in memory into a TCP flow (i.e., disk performance doesn't matter). This should happen over one or more 1 gigabit Ethernet ports, and the machines should run Linux (ideally), or perhaps Mac OS X or some other *nix. Other than that, there are few constraints (e.g., even something ARM-based could be fine). So here's the question: What's the cheapest server per gigabit? Price and power are both considerations.

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• DopeWarz 2010

  - by Theo Moore

  A few (6?) weeks ago, I started a project that I've always wanted to do. I am doing a re-write of the old VB6 game DopeWars with a partner in crime. I loved that game and spent many, many hours wasting time playing it years ago. I liked it so much, I even registered it (it was $5...even then, that wasn't much to spend). The VB6 version itself was a port of the old DOS game DrugWars (never go to play that). I needed a game project to work on as it's been far too long since I've done any game work. There is surprising amount of logic built into the game (there is the way I'm writing it, anyway) with what is really a minimal interface. My design goal was to have an object model that could be easily adapted to any interface and so far, I've managed to do that. I am even considering a web-based version that could run via Facebook (no clue how to do that...yet). I've enlisted the help of one of my DBA buddies to work on the interface while I am working on the object model. So far, this arrangement has gone well. The logical separation of concerns allows for us to collaborate easily. Once we get to the Facebook step, it will be great to have a DBA "on staff" to help that part off of the ground. The object model is probably about 60% complete with quite a bit of testing to go. More on this as we go....

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• Mapping of memory addresses to physical modules in Windows XP

  - by Josef Grahn

  I plan to run 32-bit Windows XP on a workstation with dual processors, based on Intel's Nehalem microarchitecture, and triple channel RAM. Even though XP is limited to 4 GB of RAM, my understanding is that it will function with more than 4 GB installed, but will only expose 4 GB (or slightly less). My question is: Assuming that 6 GB of RAM is installed in six 1 GB modules, which physical 4 GB will Windows actually map into its address space? In particular: Will it use all six 1 GB modules, taking advantage of all memory channels? (My guess is yes, and that the mapping to individual modules within a group happens in hardware.) Will it map 2 GB of address space to each of the two NUMA nodes (as each processor has it's own memory interface), or will one processor get fast access to 3 GB of RAM, while the other only has 1 GB? Thanks!

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• Representing and executing simple rules - framework or custom?

  - by qtips

  I am creating a system where users will be able to subscribe to events, and get notified when the event has occured. Example of events can be phone call durations and costs, phone data traffic notations, and even stock rate changes. Example of events: customer 13532 completed a call with duration 11:45 min and cost $0.4 stock rate for Google decreased with 0.01% Customers can subscribe to events using some simple rules e.g. When stock rate of Google decreases more than 0.5% When the cost of a call of my subscription is over $1 Now, as the set of different rules is currently predefined, I can easily create a custom implemention that applies rules to an event. But if the set of rules could be much larger, and if we also allow for custom rules (e.g. when stock rate of Google decreses more than 0.5% AND stock rate of Apple increases with 0.5%), the system should be able to adapt. I am therefore thinking of a system that can interpret rules using a simple grammer and then apply them. After som research I found that there exists rule-based engines that can be used, but I am unsure as they seem too complicated and may be a little overkill for my situation. Is there a Java framework suited for this area? Should we use framework, a rule engine, or should we create something custom? What are the pros and cons?

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• Boost your infrastructure with Coherence into the Cloud

  - by Nino Guarnacci

  Authors: Nino Guarnacci & Francesco Scarano,  at this URL could be found the original article:  http://blogs.oracle.com/slc/coherence_into_the_cloud_boost. Thinking about the enterprise cloud, come to mind many possible configurations and new opportunities in enterprise environments. Various customers needs that serve as guides to this new trend are often very different, but almost always united by two main objectives: Elasticity of infrastructure both Hardware and Software Investments related to the progressive needs of the current infrastructure Characteristics of innovation and economy. A concrete use case that I worked on recently demanded the fulfillment of two basic requirements of economy and innovation.The client had the need to manage a variety of data cache, which can process complex queries and parallel computational operations, maintaining the caches in a consistent state on different server instances, on which the application was installed.In addition, the customer was looking for a solution that would allow him to manage the likely situations in load peak during certain times of the year.For this reason, the customer requires a replication site, on which convey part of the requests during periods of peak; the desire was, however, to prevent the immobilization of investments in owned hardware-software architectures; so, to respond to this need, it was requested to seek a solution based on Cloud technologies and architectures already offered by the market. Coherence can already now address the requirements of large cache between different nodes in the cluster, providing further technology to search and parallel computing, with the simultaneous use of all hardware infrastructure resources. Moreover, thanks to the functionality of "Push Replication", which can replicate and update the information contained in the cache, even to a site hosted in the cloud, it is satisfied the need to make resilient infrastructure that can be based also on nodes temporarily housed in the Cloud architectures. There are different types of configurations that can be realized using the functionality "Push-Replication" of Coherence. Configurations can be either: Active - Passive  Hub and Spoke Active - Active Multi Master Centralized Replication Whereas the architecture of this particular project consists of two sites (Site 1 and Site Cloud), between which only Site 1 is enabled to write into the cache, it was decided to adopt an Active-Passive Configuration type (Hub and Spoke). If, however, the requirement should change over time, it will be particularly easy to change this configuration in an Active-Active configuration type. Although very simple, the small sample in this post, inspired by the specific project is effective, to better understand the features and capabilities of Coherence and its configurations. Let's create two distinct coherence cluster, located at miles apart, on two different domain contexts, one of them "hosted" at home (on-premise) and the other one hosted by any cloud provider on the network (or just the same laptop to test it :)). These two clusters, which we call Site 1 and Site Cloud, will contain the necessary information, so a simple client can insert data only into the Site 1. On both sites will be subscribed a listener, who listens to the variations of specific objects within the various caches. To implement these features, you need 4 simple classes: CachedResponse.java Represents the POJO class that will be inserted into the cache, and fulfills the task of containing useful information about the hypothetical links navigation ResponseSimulatorHelper.java Represents a link simulator, which has the task of randomly creating objects of type CachedResponse that will be added into the caches CacheCommands.java Represents the model of our example, because it is responsible for receiving instructions from the controller and performing basic operations against the cache, such as insert, delete, update, listening, objects within the cache Shell.java It is our controller, which give commands to be executed within the cache of the two Sites So, summarily, we execute the java class "Shell", asking it to put into the cache 100 objects of type "CachedResponse" through the java class "CacheCommands", then the simulator "ResponseSimulatorHelper" will randomly create new instances of objects "CachedResponse ". Finally, the Shell class will listen to for events occurring within the cache on the Site Cloud, while insertions and deletions are performed on Site 1. Now, we realize the two configurations of two respective sites / cluster: Site 1 and Site Cloud.For the Site 1 we define a cache of type "distributed" with features of "read and write", using the cache class store for the "push replication", a functionality offered by the project "incubator" of Oracle Coherence.For the "Site Cloud" we expect even the definition of “distributed” cache type with tcp proxy feature enabled, so it can receive updates from Site 1.  Coherence Cache Config XML file for "storage node" on "Site 1" site1-prod-cache-config.xml Coherence Cache Config XML file for "storage node" on "Site Cloud" site2-prod-cache-config.xml For two clients "Shell" which will connect respectively to the two clusters we have provided two easy access configurations.  Coherence Cache Config XML file for Shell on "Site 1" site1-shell-prod-cache-config.xml Coherence Cache Config XML file for Shell on "Site Cloud" site2-shell-prod-cache-config.xml Now, we just have to get everything and run our tests. To start at least one "storage" node (which holds the data) for the "Cloud Site", we can run the standard class  provided OOTB by Oracle Coherence com.tangosol.net.DefaultCacheServer with the following parameters and values:-Xmx128m-Xms64m-Dcom.sun.management.jmxremote -Dtangosol.coherence.management=all -Dtangosol.coherence.management.remote=true -Dtangosol.coherence.distributed.localstorage=true -Dtangosol.coherence.cacheconfig=config/site2-prod-cache-config.xml-Dtangosol.coherence.clusterport=9002-Dtangosol.coherence.site=SiteCloud To start at least one "storage" node (which holds the data) for the "Site 1", we can perform again the standard class provided by Coherence  com.tangosol.net.DefaultCacheServer with the following parameters and values:-Xmx128m-Xms64m-Dcom.sun.management.jmxremote -Dtangosol.coherence.management=all -Dtangosol.coherence.management.remote=true -Dtangosol.coherence.distributed.localstorage=true -Dtangosol.coherence.cacheconfig=config/site1-prod-cache-config.xml-Dtangosol.coherence.clusterport=9001-Dtangosol.coherence.site=Site1 Then, we start the first client "Shell" for the "Cloud Site", launching the java class it.javac.Shell  using these parameters and values: -Xmx64m-Xms64m-Dcom.sun.management.jmxremote -Dtangosol.coherence.management=all -Dtangosol.coherence.management.remote=true -Dtangosol.coherence.distributed.localstorage=false -Dtangosol.coherence.cacheconfig=config/site2-shell-prod-cache-config.xml-Dtangosol.coherence.clusterport=9002-Dtangosol.coherence.site=SiteCloud Finally, we start the second client "Shell" for the "Site 1", re-launching a new instance of class  it.javac.Shell  using  the following parameters and values: -Xmx64m-Xms64m-Dcom.sun.management.jmxremote -Dtangosol.coherence.management=all -Dtangosol.coherence.management.remote=true -Dtangosol.coherence.distributed.localstorage=false -Dtangosol.coherence.cacheconfig=config/site1-shell-prod-cache-config.xml-Dtangosol.coherence.clusterport=9001-Dtangosol.coherence.site=Site1  And now, let’s execute some tests to validate and better understand our configuration. TEST 1The purpose of this test is to load the objects into the "Site 1" cache and seeing how many objects are cached on the "Site Cloud". Within the "Shell" launched with parameters to access the "Site 1", let’s write and run the command: load test/100 Within the "Shell" launched with parameters to access the "Site Cloud" let’s write and run the command: size passive-cache Expected result If all is OK, the first "Shell" has uploaded 100 objects into a cache named "test"; consequently the "push-replication" functionality has updated the "Site Cloud" by sending the 100 objects to the second cluster where they will have been posted into a respective cache, which we named "passive-cache". TEST 2The purpose of this test is to listen to deleting and adding events happening on the "Site 1" and that are replicated within the cache on "Cloud Site". In the "Shell" launched with parameters to access the "Site Cloud" let’s write and run the command: listen passive-cache/name like '%' or a "cohql" query, with your preferred parameters In the "Shell" launched with parameters to access the "Site 1" let’s write and run the following commands: load test/10 load test2/20 delete test/50 Expected result If all is OK, the "Shell" to Site Cloud let us to listen to all the add and delete events within the cache "cache-passive", whose objects satisfy the query condition "name like '%' " (ie, every objects in the cache; you could change the tests and create different queries).Through the Shell to "Site 1" we launched the commands to add and to delete objects on different caches (test and test2). With the "Shell" running on "Site Cloud" we got the evidence (displayed or printed, or in a log file) that its cache has been filled with events and related objects generated by commands executed from the" Shell "on" Site 1 ", thanks to "push-replication" feature.  Other tests can be performed, such as, for example, the subscription to the events on the "Site 1" too, using different "cohql" queries, changing the cache configuration,  to effectively demonstrate both the potentiality and  the versatility produced by these different configurations, even in the cloud, as in our case. More information on how to configure Coherence "Push Replication" can be found in the Oracle Coherence Incubator project documentation at the following link: http://coherence.oracle.com/display/INC10/Home More information on Oracle Coherence "In Memory Data Grid" can be found at the following link: http://www.oracle.com/technetwork/middleware/coherence/overview/index.html To download and execute the whole sources and configurations of the example explained in the above post,  click here to download them; After download the last available version of the Push-Replication Pattern library implementation from the Oracle Coherence Incubator site, and download also the related and required version of Oracle Coherence. For simplicity the required .jarS to execute the example (that can be found into the Push-Replication-Pattern  download and Coherence Distribution download) are: activemq-core-5.3.1.jar activemq-protobuf-1.0.jar aopalliance-1.0.jar coherence-commandpattern-2.8.4.32329.jar coherence-common-2.2.0.32329.jar coherence-eventdistributionpattern-1.2.0.32329.jar coherence-functorpattern-1.5.4.32329.jar coherence-messagingpattern-2.8.4.32329.jar coherence-processingpattern-1.4.4.32329.jar coherence-pushreplicationpattern-4.0.4.32329.jar coherence-rest.jar coherence.jar commons-logging-1.1.jar commons-logging-api-1.1.jar commons-net-2.0.jar geronimo-j2ee-management_1.0_spec-1.0.jar geronimo-jms_1.1_spec-1.1.1.jar http.jar jackson-all-1.8.1.jar je.jar jersey-core-1.8.jar jersey-json-1.8.jar jersey-server-1.8.jar jl1.0.jar kahadb-5.3.1.jar miglayout-3.6.3.jar org.osgi.core-4.1.0.jar spring-beans-2.5.6.jar spring-context-2.5.6.jar spring-core-2.5.6.jar spring-osgi-core-1.2.1.jar spring-osgi-io-1.2.1.jar At this URL could be found the original article: http://blogs.oracle.com/slc/coherence_into_the_cloud_boost Authors: Nino Guarnacci & Francesco Scarano

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• Select tool to minimize JavaScript and CSS size

  - by Michael Freidgeim

  There are multiple ways and techniques how to combine and minify JS and CSS files.The good number of links can be found in http://stackoverflow.com/questions/882937/asp-net-script-and-css-compression and in http://www.hanselman.com/blog/TheImportanceAndEaseOfMinifyingYourCSSAndJavaScriptAndOptimizingPNGsForYourBlogOrWebsite.aspx There are 2 major approaches- do it during build or at run-time.In our application there are multiple user-controls, each of them required different JS or CSS files, and they loaded dynamically in the different combinations. We decided that loading all JS or CSS files for each page is not a good idea, but for each page we need to load different set of files.Based on this combining files on the build stage does not looks feasible.After Reviewing  different links I’ve decided that squishit should fit to our needs. http://www.codethinked.com/squishit-the-friendly-aspnet-javascript-and-css-squisherDifferent limitations of using SquishIt.We had some browser specific CSS files, that loaded conditionally depending of browser type(i.e IE and all other browsers). We had to put them in separate bundles,For Resources and AXD files we decide to use HttpModule and HttpHandler created by Mads KristensenTo GZIP html we are using wwWebUtils.GZipEncodePage() http://www.west-wind.com/weblog/posts/2007/Feb/05/More-on-GZip-compression-with-ASPNET-Content Just swap the order of which encoding you apply to start by asking for deflate support and then GZip afterwards.Additional tips about SquishIt.Use CDN: https://groups.google.com/group/squishit/browse_thread/thread/99f3b61444da9ad1Support intellisense and generate bundle in codebehind http://tech.kipusoep.nl/2010/07/23/umbraco-45-visual-studio-2010-dotless-jquery-vsdoc-squishit-masterpages/Links about other Libraries that were consideredA few links from http://stackoverflow.com/questions/5288656/which-one-has-better-minification-between-squishit-and-combres2.Net 4.5 will have out-of-the-box tools for JS/CSS combining.http://weblogs.asp.net/scottgu/archive/2011/11/27/new-bundling-and-minification-support-asp-net-4-5-series.aspx . It suggests default bundle of subfolder, but also seems supporting similar to squishit explicitly specified files.http://www.codeproject.com/KB/aspnet/combres2.aspx  config XML file can specify expiry etchttps://github.com/andrewdavey/cassette http://stackoverflow.com/questions/7026029/alternatives-to-cassetteDynamically loaded JS files requireJS http://requirejs.org/docs/start.html  http://www.west-wind.com/weblog/posts/2008/Jul/07/Inclusion-of-JavaScript-FilesPack and minimize your JavaScript code sizeYUI Compressor (from Yahoo)JSMin (by Douglas Crockford)ShrinkSafe (from Dojo library)Packer (by Dean Edwards)RadScriptManager  & RadStyleSheetManager -fromTeleric(not free)Tools to optimize performance:PageSpeed tools family http://code.google.com/intl/ru/speed/page-speed/download.htmlv

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• Advice for Setting up an On-Call Team

  - by Ciaran Archer

  I'm leading a largish development team (~35 developers). We are doing primarily Web Development work on a number of sites. Historically the knowledge on the teams has been pretty siloed. If you worked on Site A you will know how to troubleshoot it, but you would not be a lot of help on Site B. We also have a few cross-cutting concerns, i.e. common components used between sites which require specialized knowledge to troubleshoot. With all this in mind, I'm trying to understand the best way to setup an on-call team. This would be a team of programmers who would be available to deal with out-of-hours emergency issues occasionally (say one call every 2 weeks). They may be required to deploy emergency fixes. Part of me is saying we can't have a big on-call team with shallow knowledge, instead we need a smaller team with deep knowledge who can expect to be on-call more often and remunerated as such. Does anyone have any suggestions based on experience on how to setup this team? Thanks in advance.

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• box2d tween what am I missing

  - by philipp

  I have a Box2D project and I want to tween an kinematic body from position A, to position B. The tween function, got it from this blog: function easeInOut(t , b, c, d ){ if ( ( t /= d / 2 ) < 1){ return c/2 * t * t * t * t + b; } return -c/2 * ( (t -= 2 ) * t * t * t - 2 ) + b; } where t is the current value, b the start, c the end and d the total amount of frames (in my case). I am using the method introduced by this lesson of todd's b2d tutorials to move the body by setting its linear Velocity so here is relevant update code of the sprite: if( moveData.current == moveData.total ){ this._body.SetLinearVelocity( new b2Vec2() ); return; } var t = easeNone( moveData.current, 0, 1, moveData.total ); var step = moveData.length / moveData.total * t; var dir = moveData.direction.Copy(); //this is the line that I think might be corrected dir.Multiply( t * moveData.length * fps /moveData.total ) ; var bodyPosition = this._body.GetWorldCenter(); var idealPosition = bodyPosition.Copy(); idealPosition.Add( dir ); idealPosition.Subtract( bodyPosition.Copy() ); moveData.current++; this._body.SetLinearVelocity( idealPosition ); moveData is an Object that holds the global values of the tween, namely: current frame (int), total frames (int), the length of the total distance to travel (float) the direction vector (targetposition - bodyposition) (b2Vec2) and the start of the tween (bodyposition) (b2Vec2) Goal is to tween the body based on a fixed amount of frames: in moveData.total frames. The value of t is always between 0 and 1 and the only thing that is not working correctly is the resulting distance the body travels. I need to calculate the multiplier for the direction vector. What am I missing to make it work?? Greetings philipp

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• Cloud Computing and Data Utilization

  - by Ahsan Alam

  Someone recently asked me “is cloud computing going to change the way we perceive data?”. My first instinct was “off course”; but I restrained myself and thought for a moment. Then my answer was “no”. Why do I feel that way? Technology and business have evolved quite a bit in the past few decades; however, the need to effectively view and utilize data hasn't changed. It is not uncommon to see many organization to rely on multiple database management systems (DBMS). Applications and systems are often built to utilize information from all these data sources, and effectively present them to users. In addition to multiple DBMS, corporations are also housing their systems across numerous data centers. In fact, systems and data can reside anywhere around the world with the advent of globalization. Cloud based systems have simply provided us a different place to maintain our data, nothing more. Hosting costs, security and accessibility are different issues; however, the way we utilize and view these data remains the same.

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• SQL SERVER – ORDER BY ColumnName vs ORDER BY ColumnNumber

  - by pinaldave

  I strongly favor ORDER BY ColumnName. I read one of the blog post where blogger compared the performance of the two SELECT statement and come to conclusion that ColumnNumber has no harm to use it. Let us understand the point made by first that there is no performance difference. Run following two scripts together: USE AdventureWorks GO -- ColumnName (Recommended) SELECT * FROM HumanResources.Department ORDER BY GroupName, Name GO -- ColumnNumber (Strongly Not Recommended) SELECT * FROM HumanResources.Department ORDER BY 3,2 GO If you look at the result and see the execution plan you will see that both of the query will take the same amount of the time. However, this was not the point of this blog post. It is not good enough to stop here. We need to understand the advantages and disadvantages of both the methods. Case 1: When Not Using * and Columns are Re-ordered USE AdventureWorks GO -- ColumnName (Recommended) SELECT GroupName, Name, ModifiedDate, DepartmentID FROM HumanResources.Department ORDER BY GroupName, Name GO -- ColumnNumber (Strongly Not Recommended) SELECT GroupName, Name, ModifiedDate, DepartmentID FROM HumanResources.Department ORDER BY 3,2 GO Case 2: When someone changes the schema of the table affecting column order I will let you recreate the example for the same. If your development server where your schema is different than the production server, if you use ColumnNumber, you will get different results on the production server. Summary: When you develop the query it may not be issue but as time passes by and new columns are added to the SELECT statement or original table is re-ordered if you have used ColumnNumber it may possible that your query will start giving you unexpected results and incorrect ORDER BY. One should note that the usage of ORDER BY ColumnName vs ORDER BY ColumnNumber should not be done based on performance but usability and scalability. It is always recommended to use proper ORDER BY clause with ColumnName to avoid any confusion. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Pinal Dave, SQL, SQL Authority, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• Developing a Configurable Pricing Program

  - by Ben DeMott

  The organization I work at has some interesting requirements when it comes to pricing for online commerce. Currently the developers write different 'pricing rules' and those rules can be applied to our items based on attributes of the items. For Example: INPUTS: [cost, sug_retail, discontinued, warehouse_qty, orderable_qty, brand, type, days_available, shipping_rate, weight, map_protected, map_discount] MATCH: brand=x, warehouse_qty 1, discontinued=True, map_protected=False SET: retail_price = (sug_retail * 0.95), offer_price1 = (cost * 1.25 + shipping_rate) I am looking to allow the merchandising team to have more control over the pricing and formulas - they are afterall technical enough to write excel formulas. I've been looking at writing a desktop application that uses something like numexpr http://code.google.com/p/numexpr/ or http://sympy.org/en/index.html to allow non-programmers to integrate their own logic into our pricing backend. We have multiple price-tiers we have to set, for multiple markets, so an elegant solution is needed. It's getting frustrating for the dev team to continually tweak/manage all of the pricing rules (we sell over 200 brands in 3 markets). My question is; does this seem like a decent approach? Can you think of a better way to parse string-mathematical-grammer? Can you think of a different way for users to provide formula's to integrate into a automated pricing system? Does anyone know of any examples of existing applications that do this? Excel, and Access are out of the question - the volume of data we manipulate has already proven the need to automate it - now we just need some visibility into that automation.

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• Block spam by using geoip filter?

  - by faultyserver

  We are looking for a way to be able to block spam based on geographic location by filtering using geoip. context: we rarely have any email correspondence outside of the USA, so we would like to block all incoming email outside the US except for maybe one or two countries. After a little Googling I have found a couple of solutions that may work (or not), but I would like to know what other sysadmins are currently doing or what they would recommend as a solution. Here is what I have found so far: Using PowerDNS and its GeoIP backend it is possible to use geoip for filtering. Normally this backend is used to help distribute load as a kind of load balancing but I dont see why it couldnt be used to kill spam as well? Possibly use the Maxmind lite country database and some scripting to do a similar job. Ideally what I am looking for is a solution that would handle decent load and scale well too...aren't we all! ;) Thanks in advance for your help! :-)

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• Running Non-profit Web Applications on Cloud/Dedicated Hosting [closed]

  - by cillosis

  Possible Duplicate: How to find web hosting that meets my requirements? I often times build web applications purely because I enjoy it. I like building useful tools or open source applications that don't come with a price tag. That being said, many of these applications can be quite complex requiring services beyond shared hosting (ex. specific PHP extensions). This leaves me with two options: Make the web application less complex and run on shared hosting. Fork out money for cloud or dedicated/VPS hosting. Considering the application is free (I don't make money off of it intentionally), the money for hosting comes out of my own pocket. I know I am not alone in this sticky situation. So the question is, what are the hosting options that provide more advanced features such as shell access via SSH, ability to install specific software/extensions (ex. if I wish to use a NoSQL DB such as Redis, MongoDB, or Cassandra), etc., at a free or low price point? I know free usually equates to bad/unreliable hosting -- but it's not always the case. There are a couple providers with free plans I know of: Amazon EC2 - Free micro-instance for 1 year AppHarbor - Cloud based .NET web application hosting w/ free plan. What else is available for hosting of non-profit applications?

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• Level editor event system, how to translate event to game action

  - by Martino Wullems

  Hello, I've been busy trying to create a level editor for a tile based game i'm working on. It's all going pretty fine, the only thing i'm having trouble with is creating a simple event system. Let's say the player steps on a particulair tile that had the action "teleport" assigned to it in the editor. The teleport string is saved in the tile object as a variable. When creating the tilegrid an actionmanager class scans the action variable and assigns actions to the variable. public static class ActionManager { public static function ParseTileAction(tile:Tile) { switch(tile.action) { case "TELEPORT": //assign action here break; } } } Now this is an collision event, so I guess I should also provide an object to colide with the tile. But what if it would have to count for collision with all objects in the world? Also, checking for collisions in the actionmanager class doesn't seem very efficient. Am I even on the right track here? I'm new to game design so I could be completly off track. Any tips on how handeling and creating events using an editor is usually done would be great. The main problem i'm having is the Thanks in advance.

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• CodePlex Daily Summary for Monday, May 19, 2014

  CodePlex Daily Summary for Monday, May 19, 2014Popular ReleasesLINQ to Twitter: LINQ to Twitter v3.0.3: Supports .NET 4.5x, Windows Phone 8.x, Windows 8.x, Windows Azure, Xamarin.Android, and Xamarin.iOS. New features include Status/Lookup, Mute APIs, and bug fixes. 100% Twitter API v1.1 coverage, Async, Portable Class Library (PCL).CS-Script for Notepad++ (C# intellisense and code execution): Release v1.0.26.0: Added access to the Release Notes during 'Check for Updates...'' Debug panels Added support for generic types members Members are grouped into 'Raw View' and 'Non-Public members' categories Implemented dedicated (array-like) view for Lists and Dictionaries http://download-codeplex.sec.s-msft.com/Download?ProjectName=csscriptnpp&DownloadId=846498ClosedXML - The easy way to OpenXML: ClosedXML 0.70.0: A lot of fixes. See history.SFDL.NET: SFDL.NET (2.2.9.2): Changelog: Neues Icon Xup.in CnL Plugin BugfixSEToolbox: SEToolbox 01.030.008 Release 1: Fixed cube editor failing to apply color to cubes. Added to cube editor, replace cube dialog, and Build Percent dialog. Corrected for hidden asteroid ore, allowing rare ore to show when importing an asteroid, or converting a 3d model to an asteroid (still appears to be limitations on rare ore in small asteroids). Allowed ore selection to Asteroid file import. (Can copy/import and convert existing asteroid to another ore). Added progress bars to common long running operations. Fixed ...Better Robocopy GUI: Command Line GUI for Robocopy: Better Robocopy GUI had become the primary plugin in Command Line GUI built on .NET 4Mini SQL Query: Mini SQL Query (1.0.71.456): Minor fixes and template corrections.HMS_TEST: ??1: ?? ???????TFS Planning and Disaster Recovery Avoidance Guide: v1.4.BETA - TFS, DR and Azure IaaS Planning Guides: Welcome to the TFS Planning and DR Avoidance Guidance What is new? A new crisper, more compact style, which is easier to consume on multiple devices without sacrificing any content. Also included are the new TFS on Azure IaaS guide and supplementary guides. Note Capacity planning workbook and posters are included in the Everything Zip package. Quality-Bar Detail Documentation has been reviewed by Visual Studio ALM Rangers Documentation has been through an independent technical review ...CRM Web API Lead Capture Example: CRM Web API Lead Capture Example: Sample Visual Studio 2013 project that provides an example of how you could use Web API and Microsoft Azure (could be deployed anywhere) to capture simple HTML form data into Dynamics CRM without directly having to integrate a .NET component.MB Tools: MDT Monitor Tool v1.4: This tool is used to connect to an MDT 2013 Monitor Webservice. The purpose is to provide an alternative to the MDT Deployment Workbench. Update: New in v1.4: Fixed bug where Dart Remote Viewer didnt work Option to show client local time instead of UTC, edit config.xml to enable/disable New in v1.2: Fixed Dart Remote Viewer not connection to full ip Issue: 1222 New in v1.1: Added timers for autorefresh of webservice info Added some better errorchecking and cleaned up the code a bit ...Bob The Simple Text Game: Bob The Simple Text Game: Bob The Simple Text GameWinAudit: WinAudit Freeware v3.0: WinAudit.exe v3.0 MD5: 88750CCF49FF7418199B2645755830FA Known Issues: 1. Report creation can be very slow when right-to-left (Hebrew) characters are present. 2. Emsisoft Anti-Malware may stop and/or quarantine WinAudit. This happens when WinAudit attempts to obtain a list if running programmes. You will need to set an exception rule in Emsisoft to allow WinAudit to run.crashme: crashme source tarball 2.7: Updated for 64-bit Linux environments with a system call to change the default no-execute-data protection. This tarball is equivalent to committed source revision 108727LUA for Windows CE: LUA 5.2.3 for Windows CE 5.0 (ARMV4I): LUA for Windows CE This is a preliminary porting of the latest LUA release (5.2.3) to the Windows CE platform. Command-line compiler, interpreter, dynamic-link-library, and import-library (both static and dynamic stubs) are provided as a binary release. In this release, the Windows CE compatibility CRT static library has been added, in order to embed statically the LUA interpreter. Moreover, the include files are present in the distribution archive, too.Jquery Dirty Flag: Beta Version 1.0: Simple Way to Manage Dirty Flag @ Client SideProView: ProView-2: Added a new short-cut key: Ctrl+D copies the value from the above cell to the current cell. The key combination Shift+NumPadMinus makes an underscore character Fixed a bug during renaming that displayed the message "The file is in use by another process" The spread sheet can now be customized with a highlighting row color for the currently displayed image.TerraMap (Terraria World Map Viewer): TerraMap 1.0.4: Added support for the new Terraria v1.2.4 update. New items, walls, and tiles Fixed Issue 35206: Hightlight/Find doesn't work for Demon Altars Fixed finding Demon Hearts/Shadow Orbs Added ability to find Enchanted Swords (in the stone) and Water Bolt books Fixed installer not uninstalling older versions The setup file will make sure .NET 4 is installed, install TerraMap, create desktop and start menu shortcuts, add a .wld file association, and launch TerraMap. If you prefer the zip ...WPF Localization Extension: v2.2.1: Issue #9277 Issue #9292 Issue #9311 Issue #9312 Issue #9313 Issue #9314CtrlAltStudio Viewer: CtrlAltStudio Viewer 1.2.1.41167 Release: This release of the CtrlAltStudio Viewer includes the following significant features: Oculus Rift support. Stereoscopic 3D display support. Variable walking / flying speed. Xbox 360 Controller support. Kinect for Windows support. Based on Firestorm viewer 4.6.5 codebase. For more details, see the release notes linked to below. Release notes: http://ctrlaltstudio.com/viewer/release-notes/1-2-1-41167-release Support info: http://ctrlaltstudio.com/viewer/support Privacy policy: http:/...New Projects.NET Development Library: .NET Development LibraryBizTalk Flow Visualizer: This tool has been designed to help BizTalk developers and administrators visualize the flow of messages through their implementation of BizTalk Server.BlackSwan: Provides tools for value investingCamel Case Parser: Simple method with unit tests for splitting an up or down camel cased word into the words that comprise it.eukota_sandbox: really just a repository for practicing with some students i mentor.Hyperlapse: Software repository for Hyperlapse, a Universal Store App for Windows 8.1 and Windows Phone 8.1, National Level entry in code.fun.do hackathon by Microsoft.Informiamoci Partecipando: Progetto presentato al #code4italyKipLink: MVC5 Web Api 2 EF DB First Oracle 11g Custom MembershipMatAcademyPlayground: MatAcademy 2014 playgroundOgCRM: Proyecto OgCRMPowerSYDI: This is an re-engineering of SYDI vbscript created by Patrick Ogenstad in PowerShell. SharpLightReporting: SharpLightReporting is a reporting system for .Net developers, based on open source SpreadsheetLight excel/spreadsheet automation system. T4 Template to pre-generate views for Entity Framework 5.0, .NET 4.5: T4 Template to pre-generate views for Entity Framework 6.0, .NET 4.5Task Board: Simple TaskboardWentex OS: Wentex das kostenfrei Betriebssystem für alleWinldTunnel - VIPBrowserProject: NoneWintcy: Wintcy's only function is to disable taskbar transparency that Microsoft for some reason has left in Windows 8.????????-????????【??】????????????: ????????????????????????,??????????,????,????,?????????、??????,??????。 ??????-??????【??】??????????: ???????????,?????????????? ??。????????、????、????、?????????? ???????。 ??????-??????【??】??????????: ???????????????????????:????、????、??????????????,????????。????????! ??????-【??】??????????: ???????????????????,????,????,????,???????,?????,?????.??????。 ??????-??????【??】??????????: ????????????????????????????:???????,??????,????,????,????,?????！ ??????-??????【??】??????????: ????????????,??,??,??,??? ?,??,,??,??,??,??,??,??,????????,??????！ ??????-??????【??】??????????: ?????????????????,?????????????。????????????,???????,???????,?????,?????。 ??????-??????【??】??????????: ???????????? ???? ???? ???? ???? ???? ??????? ?????，????????????????. ??????-??????【??】??????????: ???????????、????、????、??????、????、????????,????????、?????????,?????。 ???????-???????【??】???????????: ?????????????????????,??????????,????????、????,??????????,??????????。 ???????-???????【??】???????????: ???????????????????、????,??100%????,??????,????????????,???????????! ???????-???????【??】???????????: ?????????,??????:?????,?????,??????,??????????,????????。????????! ??????-??????【??】??????????: ???????【.????.????.????.????.】??【??】:、??、??、??、??、??、??、??、??、??、??、?????。 ??????-??????【??】??????????: ??????????????????,????,??.??.??.??.??.??.??.???，????，???????! ??????-??????【??】??????????: ??????????????????、????、??????、????????,????????????,???????????！ ??????-??????【??】??????????: ?????????????????,???????????????。???????????,??????:????、????、???????！ ??????-??????【??】??????????: ?????????????????????,????,????,??????????。???????????????,??,??,??????????,??????... ??????-??????【??】??????????: ??????????????,?????????????,????,?????????,?????????????,?????,?????! ??????-??????【??】??????????: ????????????????，???????、???????????，????????、????、????、??????、????????。 ??????-??????【??】??????????: ????????????????、?????,????????????????????,????,????,??????。 ??????-??????【??】??????????: ?????????????:??????、????、????、????、????、??????、??????，???????! ??????-??????【??】??????????: ???????????? ???? ???? ???? ???? ???? ??????? ?????，????????????????. ??????-??????【??】??????????: ???????????????:?????? ???? ??????,???????,??????,???????。 ??????-??????【??】??????????: ????????????,????,??????????? ???? ???? ?????????,???,??,?????! ??????-??????【??】??????????: ???????????,????,????,??????,????“????、????、????、????”????????,??????. ??????-??????【??】??????????: ???????????、????、????、??????、????、????????,????????、?????????,?????。 ??????-??????【??】??????????: ?????????????????,?????????????。????????????,???????,???????,?????,?????。 ??????-??????【??】??????????: ?????????????????????????????、????、????、???????????,????,????! ??????-??????【??】??????????: ????????????????6?,???????????????????????????,??????????????,?????????！ ??????-??????【??】??????????: ????????????????8?，????????,????????,??????????,?????,????? ,????????! ??????-??????【??】??????????: ?????????????????,??????????????、???????、???????、???????、?????！ ??????-??????【??】??????????: ??????????????????????????,???????????,????????,?????????????????????。 ??????-??????【??】??????????: ????????????????????,????????????????,????????????????,??????！ ??????-??????【??】??????????: ????????????,????,??????????? ???? ???? ?????????,???,??,?????! ??????-??????【??】??????????: ???????????????????????????,???????????????????????,???????。 ??????-??????【??】??????????: ????????????????:?????? ???? ??????,???????,??????,???????。 ??????-??????【??】??????????: ?????????、???、??、??????????????????????????????,????????????????! ??????-??????【??】??????????: ????????????????????,????????:??、??、???,?????????????????????! ??????-??????【??】??????????: ?????????????,?????,???????????,???????,????,????,????,?????。 ??????-??????【??】??????????: ???????????????,????,???????、???????????,???????????,????,?????,???????。 ??????-??????【??】??????????: ??????????????????,???????????,??????????????,??????????，??????????????！ ??????-??????【??】??????????: ????????????????,?????????????? ??。??????????、????、????、?????????? ???????。 ??????-??????【??】??????????: ????????????,??????????、??????,??????????、????、????、???????。 ??????-??????【??】??????????: ?????????????、??????????????????,????????,?????,??????,????,????,????! ??????-??????【??】??????????: ??????????????????????,????????,??????????,?????,????? ,????????! ??????-??????【??】??????????: ??????????,????????,?????,???,???????????,???????????,?????,??????！ ??????-??????【??】??????????: ??????????,??????????????????????,???????????????,?????????????！ ??????-??????【??】??????????: ?????????????????????，?????????/?,,???????????,??????????????! ??????-??????【??】??????????: ????????????????,?????????、??、??、????,??????????,?????????????！ ??????-??????【??】??????????: ???????????、????、????、??????????,???,?????,???????????????. ??????-??????【??】??????????: ??????????????????????,?????, ... ????????????,????,????,?????,???????。

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• Developing professionally for iOS, Android and web - an insight

  - by Scott Roberts

  This is not really a question on how to develop all three, I know various cross platform ways and so on. But I more want to know from developer standpoint how hard it is to basically develop iOS, Android and web apps? I am currently in my first job as a mobile/web developer. I have already developed my first iPhone/iPad app and now I have to develop the app for android because the web version I tried just didn't perform as well as needed and web databases just did not seem to make the cut. But I am not sure it's possible to be good at developing all 3 in terms of remembering all the api's etc. I wouldn't say I have an issue with the programming languages just how to use the api's for the various platforms. Also, all the other languages I look at, in my spare time, just feel like I am spreading myself to thin. Is it feasible for one person to be developing ios, android and web apps? Should I think about reducing it to iOS and web based apps? I develop everything by myself, so I have no one to discuss what the best solutions are for everything and I am just trying to workout as I go along. So any cross platform developers out there? Do companies have different teams for different platforms? Any insight would just help me get my head together. Hopefully this question makes sense.

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• Looking for Light Time Management Software Suggestions (for Mac)

  - by tmo256

  I'm looking for a simple project management app that performs task scheduling, along the line of Merlin or MS Project, but no where near as robustly. I don't need to deal with other (human) resources, but I work on anything from 3 to 6 different projects at a time. What I'd like is to be able to input deadlines and tasks, and have a schedule suggested to complete them. I do technical work, but I don't think I need anything specifically for software development, especially considering I do plenty of other kinds of things, like graphic design and social media PR. I'd really like this to be dead simple, as simple as possible. Suggestions? OmniPlan, something web-based? Definitely cannot afford anything too extravagant, really looking for something under $200. Thanks for your input!

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• Alternatives to a leveling system

  - by Bane

  I'm currently designing a rough prototype of a mecha fighting game. These are the basics I came up with: Multiplayer (matchmaking for up to 10 people, for now) Browser based (HTML5) 2D (<canvas>) Persistent (as in, players have accounts and don't have to use a new mech each time they start a match) Players earn money upon destroying another mech, which is used to buy parts (guns, armor, boosters, etc) Simplicity (both of the game itself, and of the development of said game) No "leveling" (as in, players don't get awarded with XP) The last part is bothering me. At first, I wanted to have players gain experience points (XP) when destroying other mechs, but gaining two things at once (money and XP) seemed to be in conflict with my last point, which is simplicity. If I were to have a leveling system, that would require additional development. But, the biggest problem is that I simply couldn't fit it anywhere! Adding levels would require adding meaning to these levels, and most of the things that I hoped to achieve could already be achieved with the money mechanic I introduced. So I decided to drop leveling off completely. That, in turn, removed a fairly popular and robust mean of progression in games from my game (not that I would use it well anyway). Is there another way of progression in games, aside from leveling and XP points, that wouldn't get rendered redundant by my money mechanic, would be somehow meaningful (even on a symbolic level), and wouldn't be in conflict with my last point, which is simplicity?

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• Understanding normal maps on terrain

  - by JohnB

  I'm having trouble understanding some of the math behind normal map textures even though I've got it to work using borrowed code, I want to understand it. I have a terrain based on a heightmap. I'm generating a mesh of triangles at load time and rendering that mesh. Now for each vertex I need to calculate a normal, a tangent, and a bitangent. My understanding is as follows, have I got this right? normal is a unit vector facing outwards from the surface of the triangle. For a vertex I take the average of the normals of the triangles using that vertex. tangent is a unit vector in the direction of the 'u' coordinates of the texture map. As my texture u,v coordinates follow the x and y coordinates of the terrain, then my understanding is that this vector is simply the vector along the surface in the x direction. So should be able to calculate this as simply the difference between vertices in the x direction to get a vector, (and normalize it). bitangent is a unit vector in the direction of the 'v' coordinates of the texture map. As my texture u,v coordinates follow the x and y coordinates of the terrain, then my understanding is that this vector is simply the vector along the surface in the y direction. So should be able to calculate this as simply the difference between vertices in the y direction to get a vector, (and normalize it). However the code I have borrowed seems much more complicated than this and takes into account the actual values of u, and v at each vertex which I don't understand the need for as they increase in exactly the same direction as x, and y. I implemented what I thought from above, and it simply doesn't work, the normals are clearly not working for lighting. Have I misunderstood something? Or can someone explain to me the physical meaning of the tangent and bitangent vectors when applied to a mesh generated from a hightmap like this, when u and v texture coordinates map along the x and y directions. Thanks for any help understanding this.

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• RUEI 12.1.0.3.0 dependency requirement for php-soap-5.1.6

  - by sthieme

  Dear Readers,please be aware of the new php-soap-5.1.6 dependency in RUEI 12.1.0.3.For a swift upgrade to RUEI 12.1.0.3 you should be aware of this pre-requisite as it can be a time-eater to obtain individual rpm-packages inside of a datacenter for an old OS revision once you have started the upgrade process. You may use the following procedure to retrieve the required package via http://public-yum.oracle.com:Customers will have to check the /etc/issue, /etc/issue.net (or /etc/redhat-release for RHEL based OS) for their current release in order to obtain the fitting package version.Customers of OEL can download the packages from our public-yum.oracle.com Server: http://public-yum.oracle.com/repo/,  e.g. http://public-yum.oracle.com/repo/OracleLinux/OL5/8/base/x86_64/php-soap-5.1.6-32.el5.x86_64.rpmEarlier releases (up to 5.5) are located under the EnterpriseLinux instead of OracleLinux path, e.g.http://public-yum.oracle.com/repo/EnterpriseLinux/EL5/5/base/x86_64/php-soap-5.1.6-27.el5.x86_64.rpmNote: you will have to obtain the relevant RedHat rpm-packages via the login protected RHN URLs. Oracle can only provide support for Oracle Enterprise Linux and RHEL packages are not available publicly via rpm-seek.com to my knowledge. Kind regards,Stefan

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• How to convert series of MP3 to a M4B in a batch

  - by Artem Tikhomirov

  Hello. I have a batch of MP3 based books. Some of them divide into files according to book's own structure: chapters and so on. Some of them was just divided into equally lengthened parts. So. I've bought an iPhone, and I want to convert them all to M4B format. How could I convert them in a batch? I mean how cold I set up a process once, for each book, and then, after couple of weeks, receive totally converted library. The only able program for such conversion I've found was Audiobook Builder for a Mac. But it is pretty slow and do not support batching in principle. Solutions for any platform, please.

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• Leadership does not see value in standard process for machine configuration and new developer orientation

  - by opensourcechris

  About 3 months ago our lead web developer and designer(same person) left the company, greener pastures was the reason for leaving. Good for them I say. My problem is that his department was completely undocumented. Things have been tough since the lead left, there is a lot of knowledge both theoretical knowledge we use to quote new projects and technical/implementation knowledge of our existing products that we have lost as a result of his departure. My normal role is as a product manager (for our products themselves) and as a business analyst for some of our project based consulting work. I've taught myself to code over the past year and in an effort to continue moving forward I've taken on the task of setting my laptop up as a development machine with hopes of implementing some of the easier feature requests and fixing some of the no brainer bugs that get submitted into our ticketing system. But, no one knows how to take a fresh Windows machine and configure it to work seamlessly with our production apps. I have requested my boss, who is still in contact with the developer who left, ask them to document and create a process to onboard a new developer, software installation, required packages, process to deploy to the productions application servers, etc. None of this exists, and I'm spinning my wheels trying to get my computer working as a functional development machine. But she does not seem to understand the need for such a process to exist. Apparently the new developer who replaced the one who left has been using a machine that was pre-configured for our environment, so even the new developer could not set up a new machine if we added another developer. My question is two part: Am I wrong in assuming a process to on-board and configure a new computer to be part of our development eco-system should exist? Am I being a whinny baby and should I figure the process out and create a document on my own?

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• Ubuntu VPS - email and webserver

  - by xZero

  I have a VPS based on Ubuntu, it has installed whole LAMP, everything needed for a web server and it works perfectly, but I'm still not able to configure it as a mail server.... I have configured MX record for my domain mail.mydomain.com and this part is OK, I also installed Postfix, Dovecot and Roundcube, configured it using this tutorial: http://ubuntuguide.org/wiki/Mail_Server_setup And after hours of configuring it doesn't work. I have experience with Linux and web hosting, but I successfully configured mail server once in past on Debian 6, and that with help from there. When I try to send email to me my gmail says: Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the server for the recipient domain mydomain.com by dc147738a1117e4c12273.mydomain.com. [MY_SERVER_IP]. The error that the other server returned was: 554 5.7.1 <[email protected]>: Relay access denied Also I have Webmin control panel which works perfectly, how to configure postfix and dovecot from there? Thanks in advance.

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• UNIX-Security Advise

  - by Phoibe

  Hello, I want to build a quite secure UNIX-Server. Mechanisms I already implemented: SNORT + fwsnort for banning psad to block network-scanning attempts Portknocking to start+open SSH (key-based login - no password) hourly update of IP-Tables-Rules from a Security-Subscription Fail2Ban ClamAV & Rootkithunter + Logwatch What service-independent security mechanism would you add to this? What mechanism are you using? The server will run Apache&Postfix. For Apache hiding the server-information ofc. and nothing I can think of for Postfix. Thanks

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• How low-power can a home server get?

  - by Halik

  I've got quite simple question actually. How green, low-power and efficient x86 home server can I build using consumer parts with rather constrained budget. After looking through some Google hits I've found out that system based on dual-core atom, some modest mITX board (gigabit lan, integrated audio and gfx etc), one RAM module and one 'green' WD HDD, powered by picoITX PSU uses about 30W at idle up to 40 at load. Can you get lower (or how much lower) then that? Maybe some VIA nano chips, or single core atom? My home server would take care of some back-upping mixed with little ftp/http traffic.

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