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  • ideas on multiplayer games which include lots of collaboration?

    - by user494461
    For my master thesis I wanted to design a small multiplayer game which includes more than one player(maybe 5), has 2-3 players collaborating at a time to achieve some task. The most important thing is realistic simulation of the movable objects in the scene which more than one player should simultaneously interact with. I would also prefer large virtual environments (VEs) like mmogs where groups of players are interacting in different areas of the VE. tasks for players should include 2-3 players touching movable objects at same time. e,g, a very basic task can be users lifting a cube together and pushing it through a hole I am not new to designing virtual environments with openGL, but have never designed games before and rarely play other than few of my favorite ones like Fifa. I wanted some ideas on what kind of games should I look at which should help me with ideas for my tasks for the users to gain points and win in games? any current indie games which might inspire me?

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  • How to Create a DotNetNuke Skin Object from an OWS Configuration - 2 Videos

    In this tutorial we walk you through how to create and place Open Web Studio skin objects directly into your DotNetNuke skin. We cover how to create an OWS menu and feedback form and how to convert those modules into DNN Skin Objects. The videos contain: Video 1 - Building the New OWS Configuration and Creating the Menu System Video 2 - Placing the OWS Skin Object within the Skin File and Creating a Feedback Skin Object Total Time Length: 18minsDid 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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  • Do I lose/gain performance for discarding pixels even if I don't use depth testing?

    - by Gajoo
    When I first searched for discard instruction, I've found experts saying using discard will result in performance drain. They said discarding pixels will break GPU's ability to use zBuffer properly because GPU have to first run Fragment shader for both objects to check if the one nearer to camera is discarded or not. For a 2D game I'm currently working on, I've disabled both depth-test and depth-write. I'm drawing all objects sorted by their depth and that's all, no need for GPU to do fancy things. now I'm wondering is it still bad if I discard pixels in my fragment shader?

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  • XNA Octree with batching

    - by Alex
    I'm integrating batching in my engine. However I'm using an octree which is auto generated around my scene. Now batching renders a hole group at ones while an octree sorts out which objects that should be rendered within the camera frustum, therefore dividing the group. Batching and octree doesn't go along very well, right? Problem: The way I see it I have two options, either create batch groups based on objects who are close to one another within the octree or I can rebuild the batching matrixbuffer for the instances visible each frame. Which approach should I go with or does there exist another solution?

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  • Tweaking Hudson memory usage

    - by rovarghe
    Hudson 3.1 has some performance optimizations that greatly reduces its memory footprint. Prior to this Hudson used to always hold the entire data model (all jobs and all builds) in memory which affected scalability. Some installations configured heap sizes in excess of 1GB to counteract this. Hudson 3.1.x maintains an MRU cache and only loads jobs and builds as they are required. Because of the inability to change existing APIs and be backward compatible with plugins, there were limits to how far we could go with this approach. Memory optimizations almost always come with a related cost, in this case its additional I/O that has to be performed to load data on request. On a small site that has frequent traffic, this is usually not noticeable since the MRU cache will usually hold on to all the data. A large site with infrequent traffic might experience some delays when the first request hits the server after a long gap. If you have a large heap and are able to allocate more memory, the cache settings can be adjusted to take advantage of this and even go back to pre-3.1 behavior. All the cache settings can be passed as options to the JVM container (Tomcat or the default Jetty container) using the -D option. There are two caches, independant of each other, one for Jobs and the other for Builds. For the jobs cache: hudson.jobs.cache.evict_in_seconds ( default=60 ) Seconds from last access (could be because of a servlet request or a background cron thread) a job should be purged from the cache. Set this to 0 to never purge based on time. hudson.jobs.cache.initial_capacity ( default=1024 ) Initial number of jobs the cache can accomodate. Setting this to the number of jobs you typically display on your Hudson landing page or home page will speed up consecutive access to that page. If the default is too large you may consider downsizing and using that memory for the Builds cache instead. hudson.jobs.cache.max_entries ( default=1024) Maximum number of jobs in the cache. The default is large enough for most installations, but if you find I/O activity when always accessing the hudson home page you might consider increasing this, but first verify if the I/O is caused by frequent eviction (see above), rather than by the cache not being large enough. For the builds cache: The builds cache is used to store Build objects as they are read from storage. Typically this happens when a user drills down into the details of a particular Job from the hudson hom epage. The cache is shared among builds for different jobs since in most installations all jobs are not accessed with the same frequency, so a per-job builds cache would be a waste of memory. hudson.job.builds.cache.evict_in_seconds ( default=60 ) Same as the equivalent Job cache, applied to Build. hudson.job.builds.cache.initial_capacity" ( default=512 ) Same as equivalent Job cache setting. Note the smaller initial size. If your site stores a large number of builds and has frequent access to more builds you might consider bumping this up. hudson.job.builds.cache.max_entries ( default=10240 ) The default max is large enough for most installations, the builds cache has bigger sized objects, so be careful about increasing the upper limit on this. See section on monitoring below. Sample usage: java -jar hudson-war-3.1.2-SNAPSHOT.war -Dhudson.jobs.cache.evict_in_seconds=300 \ -Dhudson.job.builds.cache.evict_in_seconds=300 Monitoring cache usage The 'jmap' tool that comes with the JDK can be used to monitor cache performance in an indirect way by looking at the number of Job and Build objects in each cache. Find the PID of the hudson instance and run $ jmap -histo:live <pid | grep 'hudson.model.*Lazy.*Key$' Here's a sample output: num #instances #bytes class name 523: 28 896 hudson.model.RunMap$LazyRunValue$Key 1200: 3 96 hudson.model.LazyTopLevelItem$Key These are the keys to the Jobs (LazyTopLevelItem$Key) and Builds (RunMap$LazyRunValue$Key) in the caches, so counting the number of keys is a good indicator of the number of items in the cache at any given moment. The size in bytes can be ignored, they are just the size of the keys, not the actual sizes of the objects they hold. Those sizes can only be obtained with a profiler. With the output above we can conclude that there are 3 jobs and 28 builds in memory. The 28 builds can all be from 1 job or all 3 jobs. Over time on an idle system, these should get evicted and memory cache should be empty. In practice, because of background cron threads and triggers, jobs rarely fall down to zero. Access of a job or a build by a cron thread resets the eviction timer.

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  • Creating several instances of the same object, and selecting only one

    - by hustlerinc
    I'm playing around with making a puzzle game, haven't done that much before I run into my first problem. Basically, I want to create a certain amount of the same object/function. But without hardcoding the different instances. I think maybe an array is a good idea? and then a for loop to push the objects in? And then I need to be able to select one of these objects by clicking on it, how would I do that? How do I know which ball in the array was clicked? A loop again? I made a jsFiddle example (you need to click the orange ball to select, then you can move it around by clicking the canvas). This is what I want to do, but with more balls. How would you solve this? Help appreciated.

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  • Pillar Axiom OpenWorld Highlights

    - by uwes
    During the Storage General Session at Oracle OpenWorld Conference 2012 in San Francisco, the following Axiom-related announcements were made: Oracle Platinum Services for Axiom 600: Extending Oracle's Platinum Services to Axiom 600 as a standalone product –  the same level of service and support you get with Exadata – 24/7 fault monitoring, dedicated response and escalation management to meet enterprise-grade SLA’s, patch planning and management. Oracle Enterprise Manager Axiom Plug-in: Allowing DBA's to manage, maintain, monitor and provision the Axiom 600 storage system from Oracle EM. Oracle Virtual Machine Axiom Plug-in: Allowing Oracle VM and System Administrators to manage, maintain, monitor and provision the Axiom 600 storage system from Oracle VM using Storage Connect. Oracle Axiom Data Protection Manager 3.1: Leveraging Axiom's Copy Services, System Administrators can automatically create Application Consistent Clones of critical Windows and Oracle DataBase environments for quick recovery. For More Information Go To: Oracle.com Pillar Axiom Page Oracle Technology Network SAN Page

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  • Multiple vulnerabilities in Pidgin

    - by RitwikGhoshal
    CVE DescriptionCVSSv2 Base ScoreComponentProduct and Resolution CVE-2010-4528 Improper Input Validation vulnerability 4.0 Pidgin Solaris 10 SPARC: 147992-02 X86: 147993-02 CVE-2011-1091 Denial of service(DOS) vulnerability 4.0 CVE-2011-2943 Denial of service(DOS) vulnerability 4.3 CVE-2011-3184 Resource Management Errors vulnerability 4.3 CVE-2011-3185 Improper Input Validation vulnerability 9.3 CVE-2011-4601 Improper Input Validation vulnerability 5.0 CVE-2011-4602 Improper Input Validation vulnerability 5.0 CVE-2011-4603 Improper Input Validation vulnerability 5.0 CVE-2011-4922 Information Exposure vulnerability 2.1 CVE-2011-4939 Permissions, Privileges, and Access Controls vulnerability 6.4 CVE-2012-1178 Resource Management Errors vulnerability 5.0 This notification describes vulnerabilities fixed in third-party components that are included in Oracle's product distributions.Information about vulnerabilities affecting Oracle products can be found on Oracle Critical Patch Updates and Security Alerts page.

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  • Speaking at SharePoint Saturday Cincinnati

    - by Enrique Lima
    I will be not only attending SPS Cincinnati, but also speaking. And I am very happy and excited about it! The topic: The difference between learning and training: Creating a SharePoint based Learning Management System The description: Training and learning have been defined as synonyms by many organizations. The difference is, training has focused on a classic and traditional model. Learning on the other hand, refers to achieving something from the receiving side of the story, not just delivery. In focusing on driving adoption it is important to have a strategy where learning is also part of the plan. This session focuses on how to create a SharePoint Learning Plan, and how to deliver the plan through the implementation of a Learning Management System. Come join us! More information about SharePoint Saturday Cincinnati can be found here: http://sharepointsaturday.org/cincinnati/default.aspx

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  • Domain Model and Querying

    - by Tyrsius
    I am new to DDD, having worked only in Transaction-Script apps with an anemic model, or just Big Balls of Mud, so please forgive any terminology I abuse. I am trying to understand the proper separation between the domain model and the repository. What is the proper way to construct a domain object that is coming from a database, assuming the (incredibly simplified) need to query for objects by status (returns enumerable), or by ID. Should a factory be building the objects, exposing methods for GetByStatus() and GetByID(), using a DIed repository? Should a repository be called directly, knowing how to build a domain model from the DTO? Should the domain model have a constructor for get by ID, using a DIed repoistory to load the initial state, using some other (?) method for the list? I am not really sure what the best way would be, and this question has an answer advocating each one (these are certainly mutuallu exclusive).

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  • How to design 2D collision callback methods?

    - by Ahmed Fakhry
    In a 2D game where you have a lot of possible combination of collision between objects, such as: object A vs object B = object B vs A; object A vs object C = object C vs A; object A vs object D = object D vs A; and so on ... Do we need to create callback methods for all single type of collision? and do we need to create the same method twice? Like, say a bullet hits a wall, now I need a method to penetrate the wall for the wall, and a method to destroy the bullet for the bullet!! At the same time, a bullet can hit many objects in the game, and hence, more different callback methods!!! Is there a design pattern for that?

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  • Delete trigger does not catch table truncation

    - by Tomaz.tsql
    Sample shows table truncation will not fire delete trigger. USE AdventureWorks; GO -- STAGING IF EXISTS (SELECT * FROM sys.objects WHERE name = 'est_del_trigger_log' AND type = 'U') DROP TABLE test_del_trigger_log; GO IF EXISTS (SELECT * FROM sys.objects WHERE name = 'est_del_trigger' AND type = 'U') DROP TABLE test_del_trigger; GO CREATE TABLE test_del_trigger (id INT IDENTITY(1,1) ,tkt VARCHAR(10) CONSTRAINT pk_test_del_trigger PRIMARY KEY (id) ); GO INSERT INTO...(read more)

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  • Assigning a different texture based on picking(XNA)

    - by Thomas Carmichael
    I'm making a game using XNA. I have some simple objects like cube and sphere, and I would like to change the texture of one face of these objects based on picking. That is, when the cursor is over one face, it turns red. The only way I've seen to do this is to overload the content processor as here: http://xbox.create.msdn.com/en-US/education/catalog/sample/picking_triangle but it seems like it shouldn't be this complicated. I'm using .x models, and would like to be able to implement this for more complex models in the future beyond cubes/spheres/etc. Is this the best/only way to go about it? I'll figure that out if that's what is necessary, but it seems that there would be a simpler solution to load a different texture to a face than I've seen, I just don't know what it is.

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  • Just Released: Oracle Instantis EnterpriseTrack 8.5

    - by Melissa Centurio Lopes
    Instantis EnterpriseTrack has been successfully integrated into the Oracle development process and the first release under Oracle is generally available. This release is a significant expansion of solution capabilities in resource management, project demand management, and project execution. It also includes customer requested product enhancements, reporting enhancements, performance optimizations, and user experience improvements. Key enhancements include: New Resource Calendar functionality provides more precise capacity visibility for resource planning and increases project plan reliability. Support for Activity Labor Cost Capitalization allows project teams to easily mark any WBS activity as CapEx or OpEx with Labor Expense Type and enforce proper classification of Labor Expense Type for activities by setting defaults through activity templates or at project level New Variable Resource Rates functionality allows project stakeholders to specify resource rate accurately over time and account for wage revisions Instantis EnterpriseTrack cloud and on-premise solutions provide a top-down approach to managing, tracking and reporting on enterprise strategies, projects, portfolios, processes, resources, and financials. Upgrade now or Visit the Instantis EnterpriseTrack site to learn more.

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  • using static methods and classes

    - by vedant1811
    I know that static methods/variables are associated with the class and not the objects of the class and are useful in situations when we need to keep count of, say the number of objects of the class that were created. Non-static members on the other hand may need to work on the specific object (i.e. to use the variables initialized by the constructor) My question what should we do when we need neither of the functionalities? Say I just need a utility function that accepts value(s) and returns a value besed solely on the values passed. I want to know whether such methods should be static or not. How is programming efficiency affected and which is a better coding practice/convention and why. PS: I don't want to spark off a debate, I just want a subjective answer and/or references.

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  • How to make this design closer to proper DDD?

    - by Seralize
    I've read about DDD for days now and need help with this sample design. All the rules of DDD make me very confused to how I'm supposed to build anything at all when domain objects are not allowed to show methods to the application layer; where else to orchestrate behaviour? Repositories are not allowed to be injected into entities and entities themselves must thus work on state. Then an entity needs to know something else from the domain, but other entity objects are not allowed to be injected either? Some of these things makes sense to me but some don't. I've yet to find good examples of how to build a whole feature as every example is about Orders and Products, repeating the other examples over and over. I learn best by reading examples and have tried to build a feature using the information I've gained about DDD this far. I need your help to point out what I do wrong and how to fix it, most preferably with code as "I would not recomment doing X and Y" is very hard to understand in a context where everything is just vaguely defined already. If I can't inject an entity into another it would be easier to see how to do it properly. In my example there are users and moderators. A moderator can ban users, but with a business rule: only 3 per day. I did an attempt at setting up a class diagram to show the relationships (code below): interface iUser { public function getUserId(); public function getUsername(); } class User implements iUser { protected $_id; protected $_username; public function __construct(UserId $user_id, Username $username) { $this->_id = $user_id; $this->_username = $username; } public function getUserId() { return $this->_id; } public function getUsername() { return $this->_username; } } class Moderator extends User { protected $_ban_count; protected $_last_ban_date; public function __construct(UserBanCount $ban_count, SimpleDate $last_ban_date) { $this->_ban_count = $ban_count; $this->_last_ban_date = $last_ban_date; } public function banUser(iUser &$user, iBannedUser &$banned_user) { if (! $this->_isAllowedToBan()) { throw new DomainException('You are not allowed to ban more users today.'); } if (date('d.m.Y') != $this->_last_ban_date->getValue()) { $this->_ban_count = 0; } $this->_ban_count++; $date_banned = date('d.m.Y'); $expiration_date = date('d.m.Y', strtotime('+1 week')); $banned_user->add($user->getUserId(), new SimpleDate($date_banned), new SimpleDate($expiration_date)); } protected function _isAllowedToBan() { if ($this->_ban_count >= 3 AND date('d.m.Y') == $this->_last_ban_date->getValue()) { return false; } return true; } } interface iBannedUser { public function add(UserId $user_id, SimpleDate $date_banned, SimpleDate $expiration_date); public function remove(); } class BannedUser implements iBannedUser { protected $_user_id; protected $_date_banned; protected $_expiration_date; public function __construct(UserId $user_id, SimpleDate $date_banned, SimpleDate $expiration_date) { $this->_user_id = $user_id; $this->_date_banned = $date_banned; $this->_expiration_date = $expiration_date; } public function add(UserId $user_id, SimpleDate $date_banned, SimpleDate $expiration_date) { $this->_user_id = $user_id; $this->_date_banned = $date_banned; $this->_expiration_date = $expiration_date; } public function remove() { $this->_user_id = ''; $this->_date_banned = ''; $this->_expiration_date = ''; } } // Gathers objects $user_repo = new UserRepository(); $evil_user = $user_repo->findById(123); $moderator_repo = new ModeratorRepository(); $moderator = $moderator_repo->findById(1337); $banned_user_factory = new BannedUserFactory(); $banned_user = $banned_user_factory->build(); // Performs ban $moderator->banUser($evil_user, $banned_user); // Saves objects to database $user_repo->store($evil_user); $moderator_repo->store($moderator); $banned_user_repo = new BannedUserRepository(); $banned_user_repo->store($banned_user); Should the User entitity have a 'is_banned' field which can be checked with $user->isBanned();? How to remove a ban? I have no idea.

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  • Is there such a thing these days as programming in the small?

    - by WeNeedAnswers
    With all the programming languages that are out there, what exactly does it mean to program in the small and is it still possible, without the possibility of re-purposing to the large. The original article which mentions in the small was dated to 1975 and referred to scripting languages (as glue languages). Maybe I am missing the point, but any language that you can built components of code out of, I would regard to being able to handle "in the large". Is there a confusion on what Objects are and do they really figure as being mandatory to being able to handle "the large". Many have argued that this is the true meaning of "In the large" and that the concepts of objects are best fit for the job.

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  • Unity LifeTimeManager for WCF

    I really love DI-frameworks. One reason is that it allows me to centralize life-time management of objects and services needed by others. Most frameworks have options to control the lifetime and allows objects to be created as Singletons, ThreadStatics, Transients (a new object everytime) etc. Im currently doing some work on a project where Unity [...]...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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  • How do I convert a partially transparent image into polygons?

    - by user82779
    I'm using GLEE2D, a level editor allowing me to import images, scale them, rotate them, and position them onto layers and export the data into XML format. However, it does not tell me objects' boundaries. I can calculate them, but only given the original image's polygons. How do I get polygons of objects in a transparent image? An example object (I outlined it): How would I turn the object, knowing the scaled size of the image, into polygons? Is there an algorithm for this? I'll use OpenGL to draw them.

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  • Video: How To Enable JavaScript IntelliSense

    Check out this How-to Enable JavaScript IntelliSense with DevExpress ASP.NET Clientside objects video: The video walks you through few simple steps it takes to get IntelliSense support for the Clientside objects of our ASP.NET controls. If youd like to see a written version, check out this detailed blog post. Watch the how-to video and then drop me a line below with your thoughts on this excellent feature.   Want to experience a better Visual Studio? Install CodeRush by downloading...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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  • Oracle HCM World: Evite Now Available! February 4-6, Las Vegas

    - by Roxana Babiciu
    Add that personal touch by inviting your human capital management partners to HCM World with our new evite! Oracle HCM World is where HR, talent management and technology intersect. This is the event for HCM professionals, whether they are involved in recruiting and staffing, learning and development, compensation and benefits, or any other aspect of HR. Nine tracks and more than 90 sessions will unveil invaluable strategy and best practices to more than 1,500 attendees. Mark Hurd and David Rock, industry luminary and CRO of NeuroLeadership Group are both confirmed as keynote speakers. The call for papers deadline has been extended to November 15 and early bird registration ends November 22. Visit the HCM World website and Field Flash for more information.

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