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• What is the best way to check if there is overlap between player and static, non-collidable items in bullet physic engine

  - by tigrou

  I'd like to add non collidable objects (eg: power ups, items, ...) in a game world using Bullet Physics Engine and to know if there is collision between player and them. Some info : there is a lot of items ( 1000), all are box shapes and they don't overlap. Here is things i have tried : btDbvt* bvtItems = new btDbvt(); //btDbvt is a hierachical AABB tree, used by Bullet foreach(var item ...) { btDbvtVolume volume = ... //compute item AABB; bvtItems->insert(volume, (void*)someExtraData); } Then, to find collisions between items and player : playerRigidBody->getAabb(min, max); btDbvtVolume playervolume = ... //compute player AABB bvtItems->collideTV(bvtItems->m_root, playervolume, *someCollisionHandler); This works fairly well (and its very fast), however, there is a problem : it only check items AABB against player AABB. That loss of precision is acceptable for items but not for player which is not a box. It would actually need another check to make sure player really collide with item but i don't know how to do this in Bullet. It would have been nice to have a function like this : playerRigidBody->checkCollisionWithAABB(); After doing trying that, I discovered that a btGhostObject exist and seems to have been made for that. I changed my code like this : foreach(var item...) { btCollisionObject* ghostObject = new btGhostObject(); ghostObject->setCollisionShape(boxShape); ghostObject->setCollisionFlags(ghostObject->getCollisionFlags() | btCollisionObject::CF_NO_CONTACT_RESPONSE); startTransform.setOrigin(...); //item position ghostObject->setWorldTransform(startTransform); dynamicsWorld->addCollisionObject(ghostObject, btBroadphaseProxy::SensorTrigger, btBroadphaseProxy:: CharacterFilter); } It also works ok, but there is a huge fps drop (almost ten times slower) which is not acceptable. Maybe there is something missing (forget set a flag) and Bullet is doing extra job for nothing or maybe all that ghostObjects are polluting broad phase and ghostObject is not the right thing for that. Any help would be appreciated.

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• Is Oracle certified to run on VMWare?

  - by Mike Dietrich

  This question in similar occurences gets asked during every Upgrade Workshop at least once. People would like to know if they can run an Oracle Database or Oracle Real Application Clusters or Oracle Grid Control or Oracle Fusion Middleware or ... in an VM environment with VMWare's virtualisation products. And the answer is: Yes, you can!! But ... there's a fine print you should take care on before setting up virtual environments with a different solution than XEN based Oracle VM. Please read Note:942852.1 - VMWare Certification for Oracle Products and Note:249212.1 - Support Position for Oracle Products Running on VMWare Virtualized Environments for further details: Support Status for VMware Virtualized Environments Oracle has not certified any of its products on VMware virtualized environments. Oracle Support will assist customers running Oracle products on VMware in the following manner: Oracle will only provide support for issues that either are known to occur on the native OS, or can be demonstrated not to be as a result of running on VMware. If a problem is a known Oracle issue, Oracle support will recommend the appropriate solution on the native OS. If that solution does not work in the VMware virtualized environment, the customer will be referred to VMware for support. When the customer can demonstrate that the Oracle solution does not work when running on the native OS, Oracle will resume support, including logging a bug with Oracle Development for investigation if required. If the problem is determined not to be a known Oracle issue, we will refer the customer to VMware for support. When the customer can demonstrate that the issue occurs when running on the native OS, Oracle will resume support, including logging a bug with Oracle Development for investigation if required. NOTE: Oracle has not certified any of its products on VMware. For Oracle RAC, Oracle will only accept Service Requests as described in this note on Oracle RAC 11.2.0.2 and later releases.

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• CodePlex Daily Summary for Wednesday, August 22, 2012

  CodePlex Daily Summary for Wednesday, August 22, 2012Popular ReleasesLINQ to Twitter: LINQ to Twitter Beta v2.0.29: Supports .NET 3.5, .NET 4.0, Silverlight 4.0, Windows Phone 7.1, Client Profile, and Windows 8. 100% Twitter API coverage. LINQ to Twitter Samples contains example code for using LINQ to Twitter with various .NET technologies. Downloadable source code also has C# samples in the LinqToTwitterDemo project and VB samples in the LinqToTwitterDemoVB project.OutlookGoogleSync: OutlookGoogleSync v1.0.5: 1.5: - changed Outlook Primary Interop Assembly to V11 (Ofice 2003) to support older Office versions - more info about start/end/needed time - got rid of app.config - changed double click to single click on tray iconZXing.Net: ZXing.Net 0.8.0.0: sync with rev. 2393 of the java version improved API, direct support for multiple barcode decoding, wrapper for barcode generating many other improvements and fixes encoder and decoder command line clients demo client for emguCV dev documentation startedScintillaNET: ScintillaNET 2.5.1: This release has been built from the 2.5 branch. Issues closed: Issue # Title 32524 32524 32550 32550 32552 32552 25148 25148 32449 32449 32551 32551 32711 32711 MFCMAPI: August 2012 Release: Build: 15.0.0.1035 Full release notes at SGriffin's blog. If you just want to run the MFCMAPI or MrMAPI, get the executables. If you want to debug them, get the symbol files and the source. The 64 bit builds will only work on a machine with Outlook 2010 64 bit installed. All other machines should use the 32 bit builds, regardless of the operating system. Facebook BadgeDocument.Editor: 2013.2: Whats new for Document.Editor 2013.2: New save as Html document Improved Traslate support Minor Bug Fix's, improvements and speed upsPulse: Pulse Beta 5: Whats new in this release? Well to start with we now have Wallbase.cc Authentication! so you can access favorites or NSFW. This version requires .NET 4.0, you probably already have it, but if you don't it's a free and easy download from Microsoft. Pulse can bet set to start on Windows startup now too. The Wallpaper setter has settings now, so you can change the background color of the desktop and the Picture Position (Tile/Center/Fill/etc...) I've switched to Windows Forms instead of WPF...Metro Paint: Metro Paint: Download it now , don't forget to give feedback to me at maitreyavyas@live.com or at my facebook page fb.com/maitreyavyas , Hope you enjoy it.MiniTwitter: 1.80: MiniTwitter 1.80 ???? ?? .NET Framework 4.5 ?????? ?? .NET Framework 4.5 ????????????? "&" ??????????????????? ???????????????????????? 2 ??????????? ReTweet ?????????????????、In reply to ?????????????? URL ???????????? ??????????????????????????????Droid Explorer: Droid Explorer 0.8.8.6 Beta: Device images are now pulled from DroidExplorer Cloud Service refined some issues with the usage statistics Added a method to get the first available value from a list of property names DroidExplorer.Configuration no longer depends on DroidExplorer.Core.UI (it is actually the other way now) fix to the bootstraper to only try to delete the SDK if it is a "local" sdk, not an existing. no longer support the "local" sdk, you must now select an existing SDK checks for sdk if it was ins...Path Copy Copy: 11.0.1: Bugfix release that corrects the following issue: 11365 If you are using Path Copy Copy in a network environment and use the UNC path commands, it is recommended that you upgrade to this version.ExtAspNet: ExtAspNet v3.1.9.1: +2012-08-18 v3.1.9 -??other/addtab.aspx???JS???BoundField??Tooltip???（Dennis_Liu）。 +??Window?GetShowReference???????????????（︶????、????、???、??~）。 -?????JavaScript?????，??????HTML????????。 -??HtmlNodeBuilder????????????????JavaScript??。 -??????WindowField、LinkButton、HyperLink????????????????????????????。 -???????????grid/griddynamiccolumns2.aspx（?????）。 -?????Type??Reset?????，??????????????????（e??）。 -?????????????????????。 -?????????int,short,double??????????（???）。 +?Window????Ge...AcDown????? - AcDown Downloader Framework: AcDown????? v4.0.1: ?? ●AcDown??????????、??、??????。????，????，?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。 ●??????AcPlay?????，??????、????????????????。 ● AcDown??????????????????，????????????????????????????。 ● AcDown???????C#??，????.NET Framework 2.0??。?????"Acfun?????"。 ????32??64? Windows XP/Vista/7/8 ??：????????Windows XP???,?????????.NET Framework 2.0???(x86)，?????"?????????"??? ??????????????，??????????： ??"AcDown?????"????????? ...Fluent Validation for .NET: 3.4: Changes since 3.3: Make ValidationResut.IsValid virtual Add private no-arg ctor to ValidationFailure to help with serialization Add Turkish error messages Work-around for reflection bug in .NET 4.5 that caused VerificationExceptions Assemblies are now unsigned to ease with versioning/upgrades (especially where other frameworks depend on FV) (Note if you need signed assemblies then you can use the following NuGet packages: FluentValidation-signed, FluentValidation.MVC3-signed, FluentV...DotNetNuke® Feedback: 06.02.01: Official Release - 17th August 2012 Please look at the Release Notes file included in the module packages or available on this page as a separate download for a listing of the bug fixes and enhancements found in this version. NOTE: Feedback v 06.02.00 REQUIRES a minimum DotNetNuke framework version of 06.02.00 as well as ASP.Net 3.5 SP1 and MS SQL Server 2005 or 2008 (Express or standard versions). This release brings some enhancements to the module as well as fixing all known bugs. Bug Fi...AssaultCube Reloaded: 2.5.3 Unnamed Fixed: If you are using deltas, download 2.5.2 first, then overwrite with the delta packages. Linux has Ubuntu 11.10 32-bit precompiled binaries and Ubuntu 10.10 64-bit precompiled binaries, but you can compile your own as it also contains the source. If you are using Mac or other operating systems, please wait while we try to package for those OSes. Try to compile it. If it fails, download a virtual machine. The server pack is ready for both Windows and Linux, but you might need to compile your ...Coding4Fun Tools: Coding4Fun.Phone.Toolkit v1.6.1: Bug Fix release Bug Fixes Better support for transparent images IsFrozen respected if not bound to corrected deadlock stateWPF Application Framework (WAF): WPF Application Framework (WAF) 2.5.0.7: Version: 2.5.0.7 (Milestone 7): This release contains the source code of the WPF Application Framework (WAF) and the sample applications. Requirements .NET Framework 4.0 (The package contains a solution file for Visual Studio 2010) The unit test projects require Visual Studio 2010 Professional Changelog Legend: [B] Breaking change; [O] Marked member as obsolete WAF: Add CollectionHelper.GetNextElementOrDefault method. InfoMan: Support creating a new email and saving it in the Send b...myCollections: Version 2.2.3.0: New in this version : Added setup package. Added Amazon Spain for Apps, Books, Games, Movie, Music, Nds and Tvshow. Added TVDB Spain for Tvshow. Added TMDB Spain for Movies. Added Auto rename files from title. Added more filters when adding files (vob,mpls,ifo...) Improve Books author and Music Artist Credits. Rewrite find duplicates for better performance. You can now add Custom link to items. You can now add type directly from the type list using right mouse button. Bug ...Player Framework by Microsoft: Player Framework for Windows 8 Preview 5 (Refresh): Support for Windows 8 and Visual Studio RTM Support for Smooth Streaming SDK beta 2 Support for live playback New bitrate meter and SD/HD indicators Auto smooth streaming track restriction for snapped mode to conserve bandwidth New "Go Live" button and SeekToLive API Support for offset start times Support for Live position unique from end time Support for multiple audio streams (smooth and progressive content) Improved intellisense in JS version NEW TO PREVIEW 5 REFRESH:Req...New Projects.NET Winforms Gantt Chart Control: Gantt Chart Control allows user to quickly create charts for prototyping or simple use cases in bigger projects.BrowseByURL: Tool that will select the right browser for displaying your URLSdummy2: This is a test projectFit Protocol Library: A library to parse and edit FIT files, used by fitness devices, such as the Garmin series of fitness GPS devices.Guild Wars 2 Build and Rotation Generator: The Guild Wars 2 Build and Rotation Generator is an audacious attempt to make an automatic character build generator in C# using the AForge genetic libraries,ISMOT - Kinect Gesture Library: A Cool Gesture LibraryKaqaz: Kaqaz is a simple weblog engine based on Xoqal framework. You can find Xoqal project link at the related projects.OAuth Lite: An easy to use library to simplify access to web resources which use OAuth 2.0 for authentication.OutlookGoogleSync: A small tool to keep the Google calendar in sync with the Outlook calendar (one way: Outlook -> Google). Doesn't need admin rights and works behind a proxy.pboa1: ????Publishing Point: Hello, my name is Leonidas Fengos and i am developer. This is a tool of publishing point about media player and media element. Please you could use and try it!!Rubik Database Tools: coming soon...Saturn Kinect: Saturn Kinect is a Kinect Interaction Library that contains classes for managing skeleton motions and using it for detecting motions,moving mouse cursor and etcShammateh: Shammateh is a simple time tracking which tends to be a personal time-sheet manager. It's based on Xoqal framework.SharePoint Webtools: SharePoint Webtools is a web application that makes administering a SharePoint Team Site more convenient. It is fully client side and requires no installation.TestOAuth: This is a test project.Type Implementer: A small .NET library (based on System.Reflection.Emit) whose purpose is to facilitate dynamic type generation at run-time.Visualizer3D: TBAWarmMeUp: WarmMeUp is the first SharePoint 2013 (compatible 2010) warm Up tool designed for large SharePoint farms (warming on every server of the farm)Xoqal: Xoqal is an application framework targeting .NET 4+ platform. It supports both of the Web and Win applications with the same infrastructure.ZipFileEx: ZipFileEx add feature that support async/await and IProgress<T> to ZipFile/ZipArchive Classes.

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• Painting with pixel shaders

  - by Gustavo Maciel

  I have an almost full understanding of how 2D Lighting works, saw this post and was tempted to try implementing this in HLSL. I planned to paint each of the layers with shaders, and then, combine them just drawing one on top of another, or just pass the 3 textures to the shader and getting a better way to combine them. Working almost as planned, but I got a little question in the matter. I'm drawing each layer this way: GraphicsDevice.SetRenderTarget(lighting); GraphicsDevice.Clear(Color.Transparent); //... Setup shader SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend, SamplerState.LinearClamp, DepthStencilState.None, RasterizerState.CullNone, lightingShader); SpriteBatch.Draw(texture, fullscreen, Color.White); SpriteBatch.End(); GraphicsDevice.SetRenderTarget(darkMask); GraphicsDevice.Clear(Color.Transparent); //... Setup shader SpriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend, SamplerState.LinearClamp, DepthStencilState.None, RasterizerState.CullNone, darkMaskShader); SpriteBatch.Draw(texture, fullscreen, Color.White); SpriteBatch.End(); Where lightingShader and darkMaskShader are shaders that, with parameters (view and proj matrices, light pos, color and range, etc) generate a texture meant to be that layer. It works fine, but I'm not sure if drawing a transparent quad on top of a transparent render target is the best way of doing it. Because I actually just need the position and params. Concluding: Can I paint a texture with shaders without having to clear it and then draw a transparent texture on top of it?

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• I've been hired on as a entry-level game developer at a company and have little/no experience in API programming, what should I expect?

  - by Mr. Geneth

  So, I've been hired on as an entry level game developer with little/no experience working with any API other than Win32. This will be an overall learning experience for me as a person and I have gone over this multiple times with the boss and he has no problem with my inexperience. He says that if I'm not worth it now, I will be later. This gives me confidence, but I still feel that I should know a lot more before tackling this position. I would be stupid to pass it up. This is one of my favorite places to come for advice and help and have tried to just accept this, but it just keeps bothering that I can't go in knowing how to at least do the basics. I want to give the company its money's worth. Ya know? My questions are: What should I expect from the other programmers in this project (In terms of patience with me and working together, and being taught)? Is this normal? Any other advice on this sort of thing would be wonderful. I just want to feel comfortable with it.

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• Story of success: MySQL Enterprise Backup (MEB) was successfully integrated with IBM Tivoli Storage Manager (TSM) via System Backup to Tape (SBT) interface.

  - by user13334359

  Since version 3.6 MEB supports backups to tape through the SBT interface.The officially supported tool for such backups to tape is Oracle Secure Backup (OSB).But there are a lot of other Storage Managers. MEB allows to use them through the SBT interface. Since version 3.7 it also has option --sbt-environment which allows to pass environment variables, not needed by OSB, to third-party managers. At the same time MEB can not guarantee it would work with all of them.This month we were contacted by a customer who wanted to use IBM Tivoli Storage Manager (TSM) with MEB. We could only say them same thing I wrote in previous paragraph: this solution is supposed to work, but you have to be pioneers of this technology. And they agreed. They agreed to be the pioneers and so the story begins.MEB requires following options to be specified by those who want to connect it to SBT interface:--sbt-database-name: a name which should be handed over to SBT interface. This can be any name. Default, MySQL, works for most cases, so user is not required to specify this option.--sbt-lib-path: path to SBT library. For TSM this library comes with "Data Protection for Oracle", which, in its turn, interfaces with Oracle Recovery Manager (RMAN), which uses SBT interface. So you need to install it even if you don't use Oracle.--sbt-environment: environment for third-party manager. This option is not needed when you use OSB, but almost always necessary for third-party SBT managers. TSM requires variable TDPO_OPTFILE to be set and point to the TSM configuration file.--backup-image=sbt:: path to the image. Prefix "sbt:" indicates that image should be sent through SBT interfaceSo full command in our case would look like: ./mysqlbackup --port=3307 --protocol=tcp --user=backup_user --password=foobar \ --backup-image=sbt:my-first-backup --sbt-lib-path=/usr/lib/libobk.so \ --sbt-environment="TDPO_OPTFILE=/path/to/my/tdpo.opt" --backup-dir=/path/to/my/dir backup-to-imageAnd this command results in the following output log: MySQL Enterprise Backup version 3.7.1 [2012/02/16] Copyright (c) 2003, 2012, Oracle and/or its affiliates. All Rights Reserved. INFO: Starting with following command line ...  ./mysqlbackup --port=3307 --protocol=tcp --user=backup_user         --password=foobar --backup-image=sbt:my-first-backup         --sbt-lib-path=/usr/lib/libobk.so         --sbt-environment="TDPO_OPTFILE=/path/to/my/tdpo.opt"         --backup-dir=/path/to/my/dir backup-to-image sbt-environment: 'TDPO_OPTFILE=/path/to/my/tdpo.opt' INFO: Got some server configuration information from running server. IMPORTANT: Please check that mysqlbackup run completes successfully.             At the end of a successful 'backup-to-image' run mysqlbackup             prints "mysqlbackup completed OK!". --------------------------------------------------------------------                        Server Repository Options: --------------------------------------------------------------------   datadir                          =  /path/to/data   innodb_data_home_dir             =  /path/to/data   innodb_data_file_path            =  ibdata1:2048M;ibdata2:2048M;ibdata3:64M:autoextend:max:2048M   innodb_log_group_home_dir        =  /path/to/data   innodb_log_files_in_group        =  2   innodb_log_file_size             =  268435456 --------------------------------------------------------------------                        Backup Config Options: --------------------------------------------------------------------   datadir                          =  /path/to/my/dir/datadir   innodb_data_home_dir             =  /path/to/my/dir/datadir   innodb_data_file_path            =  ibdata1:2048M;ibdata2:2048M;ibdata3:64M:autoextend:max:2048M   innodb_log_group_home_dir        =  /path/to/my/dir/datadir   innodb_log_files_in_group        =  2   innodb_log_file_size             =  268435456 Backup Image Path= sbt:my-first-backup mysqlbackup: INFO: Unique generated backup id for this is 13297406400663200 120220 08:54:00 mysqlbackup: INFO: meb_sbt_session_open: MMS is 'Data Protection for Oracle: version 5.5.1.0' 120220 08:54:00 mysqlbackup: INFO: meb_sbt_session_open: MMS version '5.5.1.0' mysqlbackup: INFO: Uses posix_fadvise() for performance optimization. mysqlbackup: INFO: System tablespace file format is Antelope. mysqlbackup: INFO: Found checkpoint at lsn 31668381. mysqlbackup: INFO: Starting log scan from lsn 31668224. 120220  8:54:00 mysqlbackup: INFO: Copying log... 120220  8:54:00 mysqlbackup: INFO: Log copied, lsn 31668381.           We wait 1 second before starting copying the data files... 120220  8:54:01 mysqlbackup: INFO: Copying /path/to/ibdata/ibdata1 (Antelope file format). mysqlbackup: Progress in MB: 200 400 600 800 1000 1200 1400 1600 1800 2000 120220  8:55:30 mysqlbackup: INFO: Copying /path/to/ibdata/ibdata2 (Antelope file format). mysqlbackup: Progress in MB: 200 400 600 800 1000 1200 1400 1600 1800 2000 120220  8:57:18 mysqlbackup: INFO: Copying /path/to/ibdata/ibdata3 (Antelope file format). mysqlbackup: INFO: Preparing to lock tables: Connected to mysqld server. 120220 08:57:22 mysqlbackup: INFO: Starting to lock all the tables.... 120220 08:57:22 mysqlbackup: INFO: All tables are locked and flushed to disk mysqlbackup: INFO: Opening backup source directory '/path/to/data/' 120220 08:57:22 mysqlbackup: INFO: Starting to backup all files in subdirectories of '/path/to/data/' mysqlbackup: INFO: Backing up the database directory 'mysql' mysqlbackup: INFO: Backing up the database directory 'test' mysqlbackup: INFO: Copying innodb data and logs during final stage ... mysqlbackup: INFO: A copied database page was modified at 31668381.           (This is the highest lsn found on page)           Scanned log up to lsn 31670396.           Was able to parse the log up to lsn 31670396.           Maximum page number for a log record 328 120220 08:57:23 mysqlbackup: INFO: All tables unlocked mysqlbackup: INFO: All MySQL tables were locked for 0.000 seconds 120220 08:59:01 mysqlbackup: INFO: meb_sbt_backup_close: blocks: 4162  size: 1048576  bytes: 4363985063 120220  8:59:01 mysqlbackup: INFO: Full backup completed! mysqlbackup: INFO: MySQL binlog position: filename bin_mysql.001453, position 2105 mysqlbackup: WARNING: backup-image already closed mysqlbackup: INFO: Backup image created successfully.:            Image Path: 'sbt:my-first-backup' -------------------------------------------------------------    Parameters Summary -------------------------------------------------------------    Start LSN                  : 31668224    End LSN                    : 31670396 ------------------------------------------------------------- mysqlbackup completed OK!Backup successfully completed.To restore it you should use same commands like you do for any other MEB image, but need to provide sbt* options as well: $./mysqlbackup --backup-image=sbt:my-first-backup --sbt-lib-path=/usr/lib/libobk.so \ --sbt-environment="TDPO_OPTFILE=/path/to/my/tdpo.opt" --backup-dir=/path/to/my/dir image-to-backup-dirThen apply log as usual: $./mysqlbackup --backup-dir=/path/to/my/dir apply-logThen stop mysqld and finally copy-back: $./mysqlbackup --defaults-file=path/to/my.cnf --backup-dir=/path/to/my/dir copy-back  Disclaimer. This is only story of one success which can be useful for someone else. MEB is not regularly tested and not guaranteed to work with IBM TSM or any other third-party storage manager.

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• JOB OF THE WEEK

  - by jessica.ebbelaar(at)oracle.com

  Help Desk Support Specialist - Budapest (Hungary) Do you have French and English languages skills, and are living in Hungary? Then this could be the role for you to start your career with at Oracle. We now have an opening as Help Desk Support Specialist in our office Budapest. In this role you will respond to requests for technical assistance by phone, email and/or using our help desk management system We are looking for candidates with a passion for Customer Service. Next to that planning & organizing, problem solving, time management are important competencies to have for this role. If you already had some exposure to Bio Pharmaceutical or Clinical companies that is a big plus. It is a great opportunity not only for graduates, but for all who want to start their career at Oracle and a unique chance to work in multinational team together with colleagues from all over the world! If you are interested in this position, read more here! For all of our other vacancies and internships, please visit https://campus.oracle.com.

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• How to Manage Technical Employees

  - by Ajarn Mark Caldwell

  In my current position as Software Engineering Manager I have been through a lot of ups and downs with staffing, ranging from laying-off everyone who was on my team as we went through the great economic downturn in 2007-2008, to numerous rounds of interviewing and hiring contractors, full-time employees, and converting some contractors to employee status.  I have not yet blogged much about my experiences, but I plan to do that more in the next few months.  But before I do that, let me point you to a great article that somebody else wrote on The Unspoken Truth About Managing Geeks that really hits the target.  If you are a non-technical person who manages technical employees, you definitely have to read that article.  And if you are a technical person who has been promoted into management, this article can really help you do your job and communicate up the line of command about your team.  When you move into management with all the new and different demands put on you, it is easy to forget how things work in the tech subculture, and to lose touch with your team.  This article will help you remember what’s going on behind the scenes and perhaps explain why people who used to get along great no longer are, or why things seem to have changed since your promotion. I have to give credit to Andy Leonard (blog | twitter) for helping me find that article.  I have been reading his series of ramble-rants on managing tech teams, and the above article is linked in the first rant in the series, entitled Goodwill, Negative and Positive.  I have read a handful of his entries in this series and so far I pretty much agree with everything he has said, so of course I would encourage you to read through that series, too.

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• Meaning of offset in pygame Mask.overlap methods

  - by Alan

  I have a situation in which two rectangles collide, and I have to detect how much did they collide so so I can redraw the objects in a way that they are only touching each others edges. It's a situation in which a moving ball should hit a completely unmovable wall and instantly stop moving. Since the ball sometimes moves multiple pixels per screen refresh, it it possible that it enters the wall with more that half its surface when the collision is detected, in which case i want to shift it position back to the point where it only touches the edges of the wall. Here is the conceptual image it: I decided to implement this with masks, and thought that i could supply the masks of both objects (wall and ball) and get the surface (as a square) of their intersection. However, there is also the offset parameter which i don't understand. Here are the docs for the method: Mask.overlap Returns the point of intersection if the masks overlap with the given offset - or None if it does not overlap. Mask.overlap(othermask, offset) -> x,y The overlap tests uses the following offsets (which may be negative): +----+----------.. |A | yoffset | +-+----------.. +--|B |xoffset | | : :

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• Junit test bluej [closed]

  - by user1721929

  Can someone make a junit test of this? public class PersonName { int NumberNames(String wholename) { // store the name passed in to the method String testname=wholename; // initialize number of names found int numnames=0; // on each iteration remove one name while(testname.length()>numnames) { // take the "white space" from the beginning and end testname = testname.trim(); // determine the position of the first blank // .. end of the first word int posBlank= testname.indexOf(' '); // cut off word /** * it continues to the stop sign because that is where you commanded it to end */ testname=testname.substring(posBlank+1,testname.length()); // System.out.println(numnames); // System.out.println(testname); numnames++; System.out.println(testname); } return numnames; } public static void main(String args[]) { PersonName One= new PersonName(); System.out.println(One.NumberNames("Bobby")); System.out.println(One.NumberNames("Bobby Smith")); System.out.println(One.NumberNames("Bobby L. Smith")); System.out.println(One.NumberNames(" Bobby Paul Smith Jr. ")); } }

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• Silverlight Cream for May 25, 2010 -- #869

  - by Dave Campbell

  In this Issue: Miroslav Miroslavov, Victor Gaudioso, Phil Middlemiss, Jonathan van de Veen, Lee, and Domagoj Pavlešic. From SilverlightCream.com: Book Folding effect using Pixel Shader On the new CompleteIT site, did you know the page-folding was done using PixelShaders? I hadn't put much thought into it, but that's pretty cool, and Miroslav Miroslavov has a blog post up discussing it, and the code behind it. New Silverlight Video Tutorial: How to create a Slider with a ToolTip that shows the Value of the Slider This is pretty cool... Victor Gaudioso's latest video tutorial shows how to put the slider position in the slider tooltip... code and video tutorial included. Backlighting a ListBox Put this in the cool category as well... Phil Middlemiss worked out a ListBox styling that makes the selected item be 'backlit' ... check out the screenshot on the post... and then grab the code :) Adventures while building a Silverlight Enterprise application part #33 Jonathan van de Veen is discussing changes to his project/team and how that has affected development. Read about what they did right and some of their struggles. RIA Services and Storedprocedures Lee's discussing Stored Procs and RIA Services ... he begins with one that just works, then moves on to demonstrate the kernel of the problem he's attacking and the solution of it. DoubleClick in Silverlight Domagoj Pavlešic got inspiration from one of Mike Snow's Tips of the Day and took off on the double-click idea... project source included. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Exadata X3 Sales/Pre-Sales/Support Resell Rights Enablement Day

  - by mseika

  Dear Partner, Avnet and Oracle would like to invite you to a FREE Exadata X3 Sales/Pre-Sales/Support Resell Rights Enablement Day which is taking place on Wednesday 16th January 2013 at the Oracle London City offices in Moorgate. We will give you the opportunity to get an in depth understanding of how hardware and software is engineered to work together to create the power and scalability of Exadata. The session will focus on Oracle Exadata fundamentals, features, components and capabilities. The event will be a day long and will give you the opportunity to put any questions to the presenters that will help you understand how to spot an Exadata opportunity and position Exadata in an opportunity.   Register Now Register now or call our Hotline on 01925 856999. When Wednesday 16th January 2013 Duration: 9.30am to 17.00pm Where Oracle Corporation UK Ltd. One South PlaceLondon EC2M 2RB. For directionsplease see thelocation map.   Cost No charge Contact Us Avnet Technology Solutions LimitedClarity House103 Dalton AvenueBirchwood ParkWarringtonWA3 6YBUKT: 01925 856900 F: 01925 856901 E: [email protected] Or find us online:Avnet websiteLinkedInTwitterFacebook

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• Integration error in high velocity

  - by Elektito

  I've implemented a simple simulation of two planets (simple 2D disks really) in which the only force is gravity and there is also collision detection/response (collisions are completely elastic). I can launch one planet into orbit of the other just fine. The collision detection code though does not work so well. I noticed that when one planet hits the other in a free fall it speeds backward and goes much higher than its original position. Some poking around convinced me that the simplistic Euler integration is causing the error. Consider this case. One object has a mass of 1kg and the other has a mass equal to earth. Say the object is 10 meters above ground. Assume that our dt (delta t) is 1 second. The object goes to the height of 9 meters at the end of the first iteration, 7 at the end of the second, 4 at the end of the third and 0 at the end of the fourth iteration. At this points it hits the ground and bounces back with the speed of 10 meters per second. The problem is with dt=1, on the first iteration it bounces back to a height of 10. It takes several more steps to make the object change its course. So my question is, what integration method can I use which fixes this problem. Should I split dt to smaller pieces when velocity is high? Or should I use another method altogether? What method do you suggest? EDIT: You can see the source code here at github:https://github.com/elektito/diskworld/

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• Using unordered_multimap as entity and component storage

  - by natebot13

  The Setup I've made a few games (more like animations) using the Object Oriented method with base classes for objects that extend them, and objects that extend those, and found I couldn't wrap my head around expanding that system to larger game ideas. So I did some research and discovered the Entity-Component system of designing games. I really like the idea, and thoroughly understood the usefulness of it after reading Byte54's perfect answer here: Role of systems in entity systems architecture. With that said, I have decided to create my current game idea using the described Entity-Component system. Having basic knowledge of C++, and SFML, I would like to implement the backbone of this entity component system using an unordered_multimap without classes for the entities themselves. Here's the idea: An unordered_mulitmap stores entity IDs as the lookup term, while the value is an inherited Component object. Examlpe: ____________________________ |ID |Component | ---------------------------- |0 |Movable | |0 |Accelable | |0 |Renderable | |1 |Movable | |1 |Renderable | |2 |Renderable | ---------------------------- So, according to this map of objects, the entity with ID 0 has three components: Movable, Accelable, and Renderable. These component objects store the entity specific data, such as the location, the acceleration, and render flags. The entity is simply and ID, with the components attached to that ID describing its attributes. Problem I want to store the component objects within the map, allowing the map have full ownership of the components. The problem I'm having, is I don't quite understand enough about pointers, shared pointers, and references in order to get that set up. How can I go about initializing these components, with their various member variables, within the unordered_multimap? Can the base component class take on the member variables of its child classes, when defining the map as unordered_multimap<int, component>? Requirements I need a system to be able to grab an entity, with all of its' attached components, and access members from the components in order to do the necessary calculations and reassignments for position, velocity, etc. Need a clarification? Post a comment with your concerns and I will gladly edit or comment back! Thanks in advance! natebot13

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• How do i rotate a 2D picturebox according to my mouse

  - by Gwenda.T

  I would want to rotate my picturebox which contains an image. The image will just spin around following the mouse, but the position of the image is fixed. Any idea on how it should be done? Btw using Visual Studio 2012 C# Windows phone application for Windows Phone 8. I've did a little research on google but the other codes were from VS2012 using a WinForm But it's different now I'm not able to use their code. So I was hoping I could find some answer at here! Currently now I have this private void arrowHead_Tap(object sender, System.Windows.Input.GestureEventArgs e) { Duration Time_duration = new Duration(TimeSpan.FromSeconds(0.5)); Storyboard MyStory = new Storyboard(); MyStory.Duration = Time_duration; DoubleAnimation My_Double = new DoubleAnimation(); My_Double.Duration = Time_duration; MyStory.Children.Add(My_Double); RotateTransform MyTransform = new RotateTransform(); Storyboard.SetTarget(My_Double, MyTransform); Storyboard.SetTargetProperty(My_Double, new PropertyPath("Angle")); My_Double.To = 15; arrowHead.RenderTransform = MyTransform; arrowHead.RenderTransformOrigin = new Point(0.5, 0.5); //stackPanel1.Children.Add(image1); MyStory.Begin(); } This is my only way of tilting the image however now I want it to follow my mouse! Thanks!

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• Common way of animating 'motion' for walk cycle animations

  - by Ben Hymers

  I've just posted this at the Blender artists' forums before realising I would probably get a better response from a more game development-specific audience, so apologies for cross-posting! It's for the right reasons :) I'm a programmer trying to animate a character walking for a game project, using Ogre. I've made a very simple walk cycle in Blender and exported it to Ogre, and it plays just fine. By fine, I mean it works, but there's terrible foot sliding. This is because I just animated the walk in-place (at the origin) in Blender, and of course I don't know what "speed of walk" that corresponds to, so when I move the character in-game the motion doesn't necessarily match up with the movement of the feet in the animation. So my question is: what's the normal approach for this kind of thing? At work we use Maya, and the animators either animate a special 'moveTrans' node that represents the "position" of the character (or have the exporter generate it for them from the movement of the root node), then the game can read this to know how fast the animation moves the character. So in the Maya file, the character will walk forward for one cycle and this extra node will follow along with them by their feet. I've not seen anything like this in open-source land, and there's certainly no provision for that in the Ogre Exporter script. What do you chaps normally do for this?

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• How to limit click'n'drag movement to an area?

  - by Vexille

  I apologize for the somewhat generic title. I'm really don't have much clue about how to accomplish what I'm trying to do, which is making it harder even to research a possible solution. I'm trying to implement a path marker of sorts (maybe there's a most suitable name for it, but this is the best I could come up with). In front of the player there will be a path marker, which will determine how the player will move once he finishes planning his turn. The player may click and drag the marker to the position they choose, but the marker can only be moved within a defined working area (the gray bit). So I'm now stuck with two problems: First of all, how exactly should I define that workable area? I can imagine maybe two vectors that have the player as a starting point to form the workable angle, and maybe those two arcs could come from circles that have their center where the player is, but I definetly don't know how to put this all together. And secondly, after I've defined the area where the marker can be placed, how can I enforce that the marker should only stay within that area? For example, if the player clicks and drags the marker around, it may move freely within the working area, but must not leave the boundaries of the area. So for example, if the player starts dragging the marker upwards, it will move upwards until it hits he end of the working area (first diagram below), but if after that the player starts dragging sideways, the marker must follow the drag while still within the area (second diagram below). I hope this wasn't all too confusing. Thanks, guys.

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• Can anyone explain step-by-step how the as3isolib depth-sorts isometric objects?

  - by Rob Evans

  The library manages to depth-sort correctly, even when using items of non-1x1 sizes. I took a look through the code but it's a big project to go through line by line! There are some questions about the process such as: How are the x, y, z values of each object defined? Are they the center points of the objects or something else? I noticed that the IBounds defines the bounds of the object. If you were to visualise a cuboid of 40, 40, 90 in size, where would each of the IBounds metrics be? I would like to know how as3isolib achieves this although I would also be happy with a generalised pseudo-code version. At present I have a system that works 90% of the time but in cases of objects that are along the same horizontal line, the depth is calculated as the same value. The depth calculation currently works like this: x = object horizontal center point y = object vertical center point originX and Y = the origin point relative to the object so if you want the origin to be the center, the value would be originX = 0.5, originY = 0.5. If you wanted the origin to be vertical center, horizontal far right of the object it would be originX = 1.0, originY = 0.5. The origin adjusts the position that the object is transformed from. AABB_width = The bounding box width. AABB_height = The bounding box height. depth = x + (AABB_width * originX) + y + (AABB_height * originY) - z; This generates the same depth for all objects along the same horizontal x.

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• Cocos2d/Cocos2d-x Attaching an arrow (sprite) to another body sprite (person)

  - by Satchmo Brown

  I am trying to set up a simple bow and arrow game. When the arrow hits the enemy body, the arrow's body is deleted and the arrow sprite continues to update, keeping the position correct in relation to the enemy it hit. Picture an arrow sticking into a body and that body still rotating and moving. My problem is that the rotation is completely wrong when the enemy rotates. I know how to do this in 3d with matrix transformation but I can't seem to figure it out in 2d with Cocos. Here is my method. I save offset at which the arrow hit the enemy. Every frame, I make the rotation of the sprite match the rotation of the enemy. Then, I apply the offset I took initially which is where the arrow hit the enemy. When they rotate, they rotate about their respective anchors and I am wondering if I need to set the anchor of the arrow to the center of the sprite. Does anyone know of an easy way to do this. If not, I will try to create an algorithm where the anchor is set to the offset divided by the width and height of the sprite image hopefully giving me the correct anchor values. Then I assume I need to reposition the sprite. Does anyone have a simpler way to do this?

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• Collision with half semi-circle

  - by heitortsergent

  I am trying to port a game I made using Flash/AS3, to the Windows Phone using C#/XNA 4.0. You can see it here: http://goo.gl/gzFiE In the flash version I used a pixel-perfect collision between meteors (it's a rectangle, and usually rotated) that spawn outside the screen, and move towards the center, and a shield in the center of the screen(which is half of a semi-circle, also rotated by the player), which made the meteor bounce back in the opposite direction it came from, when they collided. My goal now is to make the meteors bounce in different angles, depending on the position it collides with the shield (much like Pong, hitting the borders causes a change in the ball's angle). So, these are the 3 options I thought of: -Pixel-perfect collision (microsoft has a sample(http://create.msdn.com/en-US/education/catalog/tutorial/collision_2d_perpixel_transformed)) , but then I wouldn't know how to change the meteor angle after the collision -3 BoundingCircle's to represent the half semi-circle shield, but then I would have to somehow move them as I rotate the shield. -Farseer Physics. I could make a shape composed of 3 lines, and use that as the collision object for the shield. Is there any other way besides those? Which would be the best way to do it(it's aimed towards mobile devices, so pixel-perfect is probably not a good choice)? Most of the time there's always a easier/better way than what we think of...

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• How do I get a Laserjet M1212nf MFP working?

  - by Leandro

  I am trying to install a multifunctional printer Laserjet M1212nf MFP on Ubuntu 12.04. I downloaded and install the hplip indicated by the official web site. At the end of the installation I chose reboot the whole system and next I call hp-setup in the terminal (as normal user and then as root). After select in the dialog box my printer I got the following error: Searching... (bus=usb, search=(None), desc=0)<br> /Traceback (most recent call last):<br> File "/usr/share/hplip/ui4/setupdialog.py", line 1255, in NextButton_clicked<br> self.showAddPrinterPage()<br> File "/usr/share/hplip/ui4/setupdialog.py", line 690, in showAddPrinterPage<br> self.readwriteFaxInformation()<br> File "/usr/share/hplip/ui4/setupdialog.py", line 1079, in readwriteFaxInformation<br> self.fax_name_company = unicode(d.getStationName())<br> UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 20: ordinal not in range(128) I think at this stage the plugin should be downloaded, but it is not working. Any suggestion on how to solve this problem ? Edition: After running hp-toolbox I got the following error message : Unable to communicate with device (code=12): hp:/usb /HP_LaserJet_Professional_M1212nf_MFP?serial=000000000ST10HPQSI1c

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• Materialized View vs POJO View based on Objects representing Oracle tables

  - by Zack Macomber

  I have about 12 Oracle tables that represent data that's being integrated from an external system into my web application. This data is going to be used in an informational and comparative manner for the clients using my web application. On one particular page of my web application, I need to combine data from 3 - 5 Oracle tables for display as an HTML table on the page. We are NOT currently using a framework (Apache Struts for instance) and we're not in a position to move this Java web application into one at this moment (I'm trying to get us there...). I am certainly not an architect, but I see one of two ways that I can effectively build this page (I know there are other ways, but these seem like they would be good ones...): 1. Create an Oracle Materialized View that represents what the HTML table should look like and then create a POJO based on the View that I can then integrate into my JSP. 2. Create POJOs that represent the Oracle tables themselves and then create another POJO that is the View used for the HTML table and then integrate that POJO into my JSP. To me, it seems the Materialized View would possibly offer quicker results which is always what we strive for in web applications. But, if I just create 12 POJOs that represent the Oracle tables and then build POJO Views off of those, I have the advantage of keeping all the code in one place for this and possibility for creating any number of different views and reusable components in my web application. Any thoughts on which one might be the better route? Or, maybe you know of an even better one?

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• Efficient coding in Visual Studio (or another IDE), with touch typing

  - by cheeesus

  Moving the cursor to another position in code is one of the most frequent actions when coding. I don't write my programs from the beginning to the end, like a letter. However, moving the cursor requires me to move my right hand to the key arrows or to the mouse, which feels like an interruption to my writing rhythm, since I'm using touch typing. I want my hands to rest on the keyboard. It's difficult to explain what I mean, but I think every coder using touch typing knows what I mean. I tried many things, like defining some shortcuts as surrogate arrow keys (Shift+Alt+J, K, L, I), or buying a keyboard with a Trackpoint, Trackpad, or Trackball on it, but I have not yet found a satisfying solution to the problem. What is the best solution you know of, regardless of which IDE you use? Edit: Thank you for your answers. I am using a lot of shortkeys, but I think using a Vim plugin in Visual Studio would interfere too much with the shortkeys I am used to. Also, I have a keyboard with a built-in mouse, but I'm still looking for a better solution.

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• Mouse click events are delayed when moving the cursor in xubuntu 12.04

  - by bobbaluba

  I am trying out live xubuntu on my samsung n150 (netbook, similar to eeepc). So far everything seems perfect, except for this one thing. When I am clicking the mouse while moving the cursour, the click event is delayed. This is extremely annoying when i try to to move windows, because i end up clicking the window behind the window i am trying to move and thereby changing focus. This goes for all applications. I.e selecting text is difficult. There is no lag in the cursor movement, just the click event. The click event is registered with the new mouse position, not the one when the mouse was clicked. I tried searching for the problem, but all the other cases where either kind of different, or had no solution. EDIT: After testing some more, here are some more information. The click doesn't occur until i stop moving the cursor. If I move the cursor smoothly around, the click never gets through. I have ubuntu netbook remix 10.04 installed, and have no problems with the mouse there. EDIT2: Once I connected a usb-mouse, the problem dissappeared. Dragging now works perfectly with both the track pad and the usb mouse. I will update once I have installed xubuntu and figured out if this is a persistant problem. EDIT3: I have installed, and the problem is still there. It dissappears when I have a second mouse connected however, and after I resume from suspend. My solution for now, is just to keep the dongle connected all the time.

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• how to make HLSL effect just for lighning without texture mapping?

  - by naprox

  I'm new to XNA, i created an effect and just want to use lightning but in default effect that XNA create we should do texture mapping or the model appears 'RED', because of this lines of code in the effect file: float4 PixelShaderFunction(VertexShaderOutput input) : COLOR0 { float4 output = float4(1,0,0,1); return output; } and if i want to see my model (appear like when i use basiceffect) must do texture mapping by UV coordinates. but my model does not have UV coordinates assigned or its UV coordinates is not exported. and if i do texture mapping i got error. (i do texture mapping by this line of code in vertexshaderfunction and other necessary codes) output.UV= input.UV i have many of this models and want to work with them.(my models are in .FBX format) when i use Bassiceffect i have no problem and model appears correctly. how can i use "just" lightnings in my custom effects? and don't do texture mapping (because i have no UV coordinates in my models) and my model be look like when i use BasicEffect? if you need my complete code Here it is: http://www.mediafire.com/?4jexhd4ulm2icm2 here is inside of my Model Using BasicEffect http://i.imgur.com/ygP2h.jpg?1 and this is my code for drawing with or without BasicEffect inside of my draw() method: Matrix baseWorld = Matrix.CreateScale(Scale) * Matrix.CreateFromYawPitchRoll(Rotation.Y, Rotation.X, Rotation.Z) * Matrix.CreateTranslation(Position); foreach(ModelMesh mesh in Model.Meshes) { Matrix localWorld = ModelTransforms[mesh.ParentBone.Index] * baseWorld; foreach(ModelMeshPart part in mesh.MeshParts) { Effect effect = part.Effect; if (effect is BasicEffect) { ((BasicEffect)effect).World = localWorld; ((BasicEffect)effect).View = View; ((BasicEffect)effect).Projection = Projection; ((BasicEffect)effect).EnableDefaultLighting(); } else { setEffectParameter(effect, "World", localWorld); setEffectParameter(effect, "View", View); setEffectParameter(effect, "Projection", Projection); setEffectParameter(effect, "CameraPosition", CameraPosition); } } mesh.Draw(); } setEffectParameter is another method that sets effect parameter if i use my custom effect.

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