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  • DIY Homemade Hybrid Rocket Engine [Video]

    - by Jason Fitzpatrick
    Remember the guy with the cool DIY astronaut ice cream build? He’s back with a mini hybrid rocket engine that runs off oxygen and acrylic. I built a small rocket engine for demonstration purposes. The engine is built from a 2″ diameter acrylic rod through which I drilled a 0.5″ hole. The oxygen at 80 psi or less is passed through the hole and then is forced through a convergent-divergent nozzle at the tail end. The nozzle’s throat is about 0.25″ and expands to 0.625″. I lit the engine by inserting a burning cotton swab (with wooden stick) while a small amount of oxygen was flowing. The acrylic catches fire very easily in a pure oxygen environment. The engine can be throttled and shut off completely, which is a major benefit to hybrid engine designs. Solid-fuel rockets cannot be throttled or shut off, which makes them difficult to control. [via Make] HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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  • Finding terms surrounding a trending hashtag?

    - by aendrew
    I'm looking for a way to find "sub-trends", or words that are trending beneath a larger trend. For instance, say "#foo" is the hashtag for a conference. Searching for "#foo" only gives you a general overview of what people are talking about -- if "#foo" moves too quickly, it becomes really difficult to track disparite conversations at #foo. If "#bar" and "#abc" are two different sessions at "#foo", one can find more specific information by searching for "#foo #bar" or "#foo #abc"; yet, how would one find out about the existence of these surrounding hashtags, i.e., sub-trends? If you look at the screenshot for Peoplebrowsr, there's a panel that looks for "words surrounding [trend]," which seems to be exactly what I'm looking for. Is there a way to accomplish this more simply, i.e., without paying $149 /mo. for Peoplebrowsr? Thanks! Update: Another service that can do this is Twazzup (click for example). The "Community" panel has some limited info on surrounding words; is there a tool that does this, but with more detail?

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  • How to advertise (free) software?

    - by nebukadnezzar
    I'm not sure if this fits on SO, but other SE sites don't seem to fit either, so I understand when this question gets moved, Although I'd like to avoid getting it closed due to being offtopics, since I think that this question might fit, considering this part of the FAQ: Stack Overflow is for professional and enthusiast programmers, ... covers … a specific programming problem ... matters that are unique to the programming profession Sorry for the lengthy Introduction, though. When Software is advertised, it is usually Software for one (or more) specific purpose, such as: Mozilla Firefox - A Web Browser Ubuntu - An Operating System Python - A Programming Language Visual Studio - A Development Studio ... And so on. But when writing Libraries, that is, Software that doesn't necessarily serve one specific purpose, but instead multiple purposes, which are usually supposed to be used inside an application, such as: Irrlicht - A 3D Engine Qt - An Application Framework ... The process of advertisement gets a little more difficult. I'm a developer of the latter kind of Software, and I naturally want to advertise my Software. It's not commercial Software; It's not GPL either. It's completely free (Licensed under the MIT License :-)). I naturally host my stuff at github, which technically makes it very easy to access the software, and I thought that these might be possible options, although I have no experience with them: Submit the Software to Freshmeat, and hope for the best Submit the Software to Sourceforge, and hope someone accidently stumbles over it Write spammails, and get death threats via Mail ... But something tells me that these methods are probably not the best Methods. So, my final question would be, How does the Average Joe Hobby Programmer advertise his/her Software Library?

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  • Jagran Prakashan Increases Staff Productivity by 40%

    - by Michael Snow
    Jagran Prakashan Increases Staff Productivity by 40%, Launches New IT Projects up to 4x Faster, Enables Mobile Service, and Improves Business Agility Oracle Customer: JPL Location:  Uttar Pradesh, India Industry: Media and Entertainment Employees:  10,000 Annual Revenue:  $100 to $500 Million Jagran Prakashan Ltd. (JPL) is one of India's premier media and communications groups with interests spanning print, advertising, event management, and mobile services for weather, cricket scores, and educational activities. It is a major media enterprise, with 300 locations across 15 states. Its impressive stable of print publications includes Dainik Jagran, the world’s most widely read daily newspaper––with a readership of over 55 million––the country’s leading afternoon dailies, and a range of popular local, bilingual, and English language newspapers. JPL was using multiple systems to manage its business processes. Users were resistant to using multiple passwords for various applications, preferring to continue their less efficient, legacy work practices. In addition, there was no single repository for sharing documents across the organization, such as company announcements or project documents. The company relied on e-mail to disseminate up-to-date company information, often missing employees. It was also time-consuming and difficult for managers to track the status of ongoing assignments or projects because collaboration and document sharing was inefficient and ineffective.With diverse businesses and many geographic locations, JPL needed to implement a centralized and user-friendly enterprise portal to improve document sharing and collaboration and increase business agility. The company implemented Oracle WebCenter Portal to create a dynamic, secure, and intuitive self-service enterprise portal to improve the user experience and increase operating efficiency. It improved staff productivity by 40%, accelerated new IT projects by up to 4x, boosted staff morale, and increased business agility.   Increases Staff Productivity by 40%, Launches New Products up to 2x Faster A word from JPL "With Oracle WebCenter Portal, we gained a dynamic, secure, and intuitive self-service enterprise portal that provided an exceptional user experience and enabled us to engage employees in a collaborative environment. It increased IT staff productivity by 40%, delivered new projects up to 4x faster, and enabled mobile service to improve our business agility.” Sarbani Bhatia, Vice President IT, Jagran Prakashahn Ltd Before implementing Oracle WebCenter Portal, JPL stored project-critical information, such as page planning of daily newspaper editions and the launch of new editions or supplements on individual laptops or in the e-mail system. Collaboration between colleagues was limited to physical meetings, telephone discussions, and e-mail. It was difficult to trace and recover important project documents when a staff member resigned, which represented a significant risk to business continuity. Employees were also averse to multiple passwords and resisted using the systems, affecting staff productivity. With Oracle WebCenter Portal, JPL created a dynamic, secure, and intuitive self-service enterprise portal with business activity streams. The portal allowed users to navigate, discover, and access information, such as advertising rates, requisition approvals, ad-hoc queries, and employee surveys from a single entry point with a single password. Managers can also upload important documents, such as new pricing for advertisers or newspaper distributors, and share them through the information and instruction section in the portal. In addition, managers can now easily track and review timelines for projects online rather than gathering information from meetings and e-mails. The company gained the ability to centrally manage information, ensured business continuity, and improved staff productivity by 40%.“In the media industry, news has a very short shelf life, so speed is crucial. Information delayed is like information lost,” said Sarbani Bhatia, vice president IT, Jagran Prakashahn Ltd. “Thanks to Oracle WebCenter Portal’s contextual collaboration tools, we can provide and share feedback for new project launches, such as career or education supplements, up to 2x faster through discussion forums or knowledge groups. Tasks that previously required four months, we now complete in one month.”In addition, the company can broadcast announcements, flash employee birthdays, and promote important events through the message section on the webpage, instead of using the e-mail system. The company can also conduct opinion polls to gauge employee response to organizational issues and improve management decision-making.“With over 10,000 employees across 300 locations, it is critical for management to hear the voice of employees and develop a cohesive organizational culture. Oracle WebCenter Portal enables employees to engage with business processes and systems in a collaborative environment, providing users with an exceptional experience,” Bhatia said. Enables Mobility Access and Increases Business Agility Newspaper advertisements generate the majority of JPL’s revenue. With most sales staff on the move, the company needed to ensure timely approval of print advertisement discounts for specific clients and meet tight publication deadlines.  By integrating Oracle WebCenter Portal seamlessly with its enterprise resource planning (ERP) system and other applications, such as the organizational mass mailing system, business intelligence, and management information system, JPL embedded its approval workflow processes into the enterprise portal and provided users with an integrated and intuitive interface. About 30% of JPL’s sales staff members now have tablets and receive advertising discount approval from managers while in the field and no longer need to return to the office, which has significantly improved efficiency and increased business agility.“Application mobility was critical for sales representatives in the field to meet stringent auditing requirements for online accountability, particularly for our newspaper advertising business. Staff member satisfaction has improved significantly now that the sales team can use tablets to access the portal––a capability we will extend to smart phones in the second stage of the implementation,” Bhatia said. Accelerates Application Development by up to 4x and Cuts Costs by up to 60% With Oracle WebCenter Portal, users can easily create, modify, and upload information to their personalized webpages without IT assistance. By seamlessly integrating Oracle WebCenter Portal with the payroll database, managers can decide which members of their team can access the page and with whom they will share information, a decision based on role or geographical location. A sales representative selling advertising space for a local language daily newspaper, for example, can upload an updated advertising rate relevant only to that particular publication. Users can also easily adapt to the new platform, thanks to its intuitive design and look, reducing the need for training and lowering resistance to using the system.Using Oracle WebCenter Portal’s out-of-the-box reusable components, such as portal pages and templates, provided JPL’s developers with a comprehensive and flexible user experience platform and increased the speed of application development. In less than five months, JPL developed more than 55 workflows. The IT team accelerated deployment of new applications by up to 4x, as they do not need to install them on individual machines now that they have a web-based environment.   “Previously, we would have spent a whole day deploying a new application for each department or location. With a browser-based environment, we have cut costs by up to 60% by reducing deployment time to zero, because our IT team can roll out a new application from a single point, thanks to Oracle WebCenter Portal,” Bhatia said. Challenges Provide a dynamic, secure, and intuitive self-service enterprise portal to improve staff productivity and ensure business continuity Enable seamless integration with multiple enterprise applications to improve workflow efficiency—including approval of print advertisement discounts—and increase business agility Improve engagement with employees and enable collaboration to enhance management decision-making Accelerate time-to-market for new services, such as new advertising programs Solutions Oracle Product and ServicesOracle WebCenter Portal 11g Increased staff productivity by 40% and enhanced user satisfaction by enabling employees to easily navigate, discover, and access information from a single, self-service enterprise portal without IT assistance Launched new products, such as career or education supplements, up to 2x faster by enabling peer collaboration and incorporating feedback generated through discussion forums, thanks to Oracle WebCenter Portal’s out-of-the-box collaboration tools Accelerated application development up to 4x by enabling developers to optimize reusable components for managing and deploying new applications in a browser-based environment rather than spending one day to install applications for each department, cutting costs by up to 60% Ensured business continuity by enabling managers to easily track and review project timelines online rather than storing important documents on individual laptops or relying on the e-mail system Increased business agility and operational efficiency by seamlessly integrating with the in-house, ERP system and embedding business processes into a single portal Boosted company revenue by enabling sales team members to submit print-advertising discount requests through mobile devices instead of waiting to return to office, ensuring timely approval from managers to meet tight publication deadlines Improved management decision-making by enabling employees to easily share and access feedback through opinion polls or forums, boosting staff morale Introduced the single sign-on capability and enhanced security by enabling managers to decide access level for staff members based on role or geographical location Reduced the need for staff training and minimized user resistance to systems by providing a dynamic and intuitive user experience Why Oracle JPL did not consider other products because the company was already using Oracle Database, Enterprise Edition with Real Application Clusters and had a positive experience with Oracle. JPL chose Oracle WebCenter Portal to ensure no compatibility issues for integration with its existing Oracle products and to take advantage of the experience and support of a reputable vendor to ensure business continuity. “We chose Oracle because we knew we could rely on its support and experience. In addition, Oracle WebCenter Portal’s speed, agility, and mobile access features were a perfect fit for our business requirements,” Bhatia said. Implementation Process JPL launched the enterprise portal to 500 users in the first phase of the project, and plans to extend this to 2,000 users when the portal is fully launched. Oracle partner PricewaterhouseCoopers used Oracle Application Development Framework for the intial set-up, user training and to develop and design sample workflows. JPL’s internal IT staff then took charge of the implementation, bringing it to completion on budget. Partner Oracle PartnerPricewaterhouseCoopers (India)

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  • Should I start making connections even if I'm not ready for a job yet?

    - by James
    The first job is always the hardest to get and I'm not exception. I'm 23 years old and I have no college degree but planned on going to college this year if all goes well (CS of course). I'm self-studying java right now. I know most of the topics related to the language besides the more advanced topics and I'm beginning to look at open source projects. I would like to find a job (at least a part time job) after a year or two when I'll gain more experience and learn more about java technologies and other technologies that interest me. Finding a job will be a bit difficult because most of the people (or a lot of them at least) at my current age already have 2 years or more of experience, so I will be somewhat disadvantaged. Should I start building connections and joining websites such as linkedin ? I never bothered to look into it because I'm not much of a social network person. If I start contributing to open source projects and create personal projects for 2 years could I apply for jobs that require 1-2 years of experience? Does this experience count ?

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  • How do I use depth testing and texture transparency together in my 2.5D world?

    - by nbolton
    Note: I've already found an answer (which I will post after this question) - I was just wondering if I was doing it right, or if there is a better way. I'm making a "2.5D" isometric game using OpenGL ES (JOGL). By "2.5D", I mean that the world is 3D, but it is rendered using 2D isometric tiles. The original problem I had to solve was that my textures had to be rendered in order (from back to front), so that the tiles overlapped properly to create the proper effect. After some reading, I quickly realised that this is the "old hat" 2D approach. This became difficult to do efficiently, since the 3D world can be modified by the player (so stuff can appear anywhere in 3D space) - so it seemed logical that I take advantage of the depth buffer. This meant that I didn't have to worry about rendering stuff in the correct order. However, I faced a problem. If you use GL_DEPTH_TEST and GL_BLEND together, it creates an effect where objects are blended with the background before they are "sorted" by z order (meaning that you get a weird kind of overlap where the transparency should be). Here's some pseudo code that should illustrate the problem (incidentally, I'm using libgdx for Android). create() { // ... // some other code here // ... Gdx.gl.glEnable(GL10.GL_DEPTH_TEST); Gdx.gl.glEnable(GL10.GL_BLEND); } render() { Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); Gdx.gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA); // ... // bind texture and create vertices // ... } So the question is: How do I solve the transparency overlap problem?

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  • Can inbound links through template-based layouts result in penalties?

    - by Liam Sorsby
    So obviously link building is encouraged as long as it is natural, organic and has meaningful links with content relevant to your site. Obviously with the constant release of new updates to algorithms, Google is flagging sites for unnatural links to their sites. My Question is: Can this be caused by templating systems? With WordPress for example, where you can add a link on the footer and it is repeated throughout the entire website generating thousands of links? If we don't add any links, Good Content will be re-posted and linked to, surely if your content is constantly linked to this will flag your site for "unnatural" content as it's difficult to see if someone has been paid to write an article on your content. Or does Google just simply want us to audit some of the links to show we are making an effort? As you can tell we have had a Manual action for: Unnatural links to your site—impacts links. However, this seems to impact our website as well. Edit: To clarify the question: Can you get penalised for paying for advertising on a site that uses a templated sidebar. So when they create a new blog/page ect your link is also added onto the page hence resulting in 1000's of links to one page on our site. I know that one effect maybe a 0 pagerank web page linking to your page dilutes the PR of our page. However the links are only inbound not reciprocal

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  • juicy couture sale would nanytime go for any added casting

    - by user109129
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  • Customizing the NUnit GUI for data-driven testing

    - by rwong
    My test project consists of a set of input data files which is fed into a piece of legacy third-party software. Since the input data files for this software are difficult to construct (not something that can be done intentionally), I am not going to add new input data files. Each input data file will be subject to a set of "test functions". Some of the test functions can be invoked independently. Other test functions represent the stages of a sequential operation - if an earlier stage fails, the subsequent stages do not need to be executed. I have experimented with the NUnit parametrized test case (TestCaseAttribute and TestCaseSourceAttribute), passing in the list of data files as test cases. I am generally satisfied with the the ability to select the input data for testing. However, I would like to see if it is possible to customize its GUI's tree structure, so that the "test functions" become the children of the "input data". For example: File #1 CheckFileTypeTest GetFileTopLevelStructureTest CompleteProcessTest StageOneTest StageTwoTest StageThreeTest File #2 CheckFileTypeTest GetFileTopLevelStructureTest CompleteProcessTest StageOneTest StageTwoTest StageThreeTest This will be useful for identifying the stage that failed during the processing of a particular input file. Is there any tips and tricks that will enable the new tree layout? Do I need to customize NUnit to get this layout?

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  • 2D platformers: why make the physics dependent on the framerate?

    - by Archagon
    "Super Meat Boy" is a difficult platformer that recently came out for PC, requiring exceptional control and pixel-perfect jumping. The physics code in the game is dependent on the framerate, which is locked to 60fps; this means that if your computer can't run the game at full speed, the physics will go insane, causing (among other things) your character to run slower and fall through the ground. Furthermore, if vsync is off, the game runs extremely fast. Could those experienced with 2D game programming help explain why the game was coded this way? Wouldn't a physics loop running at a constant rate be a better solution? (Actually, I think a physics loop is used for parts of the game, since some of the entities continue to move normally regardless of the framerate. Your character, on the other hand, runs exactly [fps/60] as fast.) What bothers me about this implementation is the loss of abstraction between the game engine and the graphics rendering, which depends on system-specific things like the monitor, graphics card, and CPU. If, for whatever reason, your computer can't handle vsync, or can't run the game at exactly 60fps, it'll break spectacularly. Why should the rendering step in any way influence the physics calculations? (Most games nowadays would either slow down the game or skip frames.) On the other hand, I understand that old-school platformers on the NES and SNES depended on a fixed framerate for much of their control and physics. Why is this, and would it be possible to create a patformer in that vein without having the framerate dependency? Is there necessarily a loss of precision if you separate the graphics rendering from the rest of the engine? Thank you, and sorry if the question was confusing.

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  • ArchBeat Link-o-Rama for November 20, 2012

    - by Bob Rhubart
    Oracle Utilities Application Framework V4.2.0.0.0 Released | Anthony Shorten Principal Product Manager Anthony Shorten shares an overview of the changes implemented in the new release. Towards Ultra-Reusability for ADF - Adaptive Bindings | Duncan Mills "The task flow mechanism embodies one of the key value propositions of the ADF Framework," says Duncan Mills. "However, what if we could do more? How could we make task flows even more re-usable than they are today?" As you might expect, Duncan has answers for those questions. Oracle BPM Process Accelerators and process excellence | Andrew Richards "Process Accelerators are ready-to-deploy solutions based on best practices to simplify process management requirements," says Capgemini's Andrew Richards. "They are considered to be 'product grade,' meaning they have been designed; engineered, documented and tested by Oracle themselves to a level that they can be deployed as-is for a solution to a problem or extended as appropriate for a particular scenario." Oracle SOA Suite 11g PS 5 introduces BPEL with conditional correlation for aggregation scenarios | Lucas Jellema An extensive, detailed technical post from Oracle ACE Director Lucas Jellema. Check Box Support in ADF Tree Table Different Levels | Andrejus Baranovskis Oracle ACE Director Andrejus Baranovskis updates last year's "ADF Tree - How to Autoselect/Deselect Checkbox" post with new information. As Boom Lures App Creators, Tough Part Is Making a Living Great New York Times article about mobile app develoment also touches on other significant IT issues. Thought for the Day "Building large applications is still really difficult. Making them serve an organisation well for many years is almost impossible." — Malcolm P. Atkinson Source: SoftwareQuotes.com

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  • How to spread XML Sitemaps over several webservers behind AWS loadbalancer?

    - by Jurik
    We have a web portal with almost a million products and way more other urls. I wrote a script that checks database. If there is a new url needed or an old one update, this script will update/create the XML Sitemaps. But we have several servers behind the load balancer at our rented AWS space. Further this script checks database for each url if there was an update so that it updates the appropriate xml file too. My question is how to spread those XML Sitemaps over all webservers behind this AWS load balancer? Our approaches/ideas: we could just generate them on one server with a cron job and copy them to the other servers, but this could be difficult because of automatic raising numbers of servers and so on. we put them on our S3 - but this one is not avaible thru our domain, so I guess google will have a problem with it I let my script run on every webserver but change it in a way that it will generate each time all xml files if they do not exist. But then I would have conflicts with updated URLs in my database, where I saved timestamp of last changed value of every url Is there another - better - solution that I do not know? Are there any special services by amazon for such cases?

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  • IT Optimization Plan Pays Off For UK Retailer

    - by [email protected]
    I caught this article in ComputerworldUK yesterday. The headline talks about UK-based supermarket chain Morrisons is increasing their IT spend...OK, sounds good. Even nicer that Oracle is a big part of that. But what caught my eye were three things: 1) Morrison's truly has a long term strategy for IT. In this case, modernizing and optimizing how they use IT for business advantage. 2) Even in a tough economic climate, Morrison's views IT investments as contributing to and improving the bottom line. Specifically, "The investment in IT contributed to a 21 percent increase in Morrison's underlying profit.." 3) The phased, 3-year "Optimization Plan" took a holistic approach to their business--from CRM and Supply Chain systems to the underlying application infrastructure. On the infrastructure front, adopting a more flexible Service-Oriented Architecture enabled them to be more agile and adapt their business and Identity Management helped with sometimes mundane (but costly) issues like lost passwords and being able to document who has access to what. Things don't always turn out so rosy. And I know it was a long and difficult process...but it's nice to see a happy ending every once in a while.

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  • Free Software for Billing (Columbia)

    - by Yoimir Yamit Castrillon Duque
    English I'm looking for a billing application (also inventories, shopping, clients, providers, accounts, etc) for small businesses. The software should adapt with Colombia's necessities. I searched for it in Google, and I found several ERP such as OpenBravo and Adempiere, but these applications are very big and difficult to use, in fact, I couldn't make them work. I found an application called Ubifactura (made specifically for Colombia), I downloaded the Java source code, but I don't have any idea about how to compile it. I need someone to help me to compile it or just some recommendations for similar software. The idea is to help small business from my town with one of these applications (it doesn't matter if it is for Windows or Linux), the idea is to help. All help is welcome. Spanish (Español) Estoy buscando una aplicacion de facturacion (tambien inventario, compras, clientes, proveedores, cuentas, etc) para pequeñas empresas, que se adaptade a las necesidades de Colombia, en google encontre varios ERP como openbravo y adempiere, pero aplicaciones muy grandes y dificiles de manejas, de hecho no puede hacerlas funcionar. Encontre un programa llamado Ubifactura, hecho para facturar en Colomabia, descarge los archivos de codigo fuente en java, pero no tengo ni idea de como ponerlo a funcionar, pues habla de eclipce, de un servsdor CVS, que no tengo ni idea de como poner a funcionar, necesito si alguien me puede ayudar a trabajar con estos archivos java, o me suguieran aplicacion de acuerdo a mis necesidades. La idea es bebeficiar a varias pequeñas empresas de mi pueblo con una aplicacion de estas, ni importa si en entorno windows o ubuntu, la idea es aportarles algo desde el software libre. Saludos y a la espera de respuestas. Toda ayuda es bienvenida.

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  • Difficulty / Process for mobile 2D multiplayer RPG game

    - by user2827214
    I'm looking to develop a 2D multiplayer RPG game for Android, with a bird's eye view similar to that of zelda/pokemon. The game is very simple in all ways since my intent is for thousands of players to occupy the same world which I imagine requires good performance. However, I am unsure about the performance requirements of two properties: the tile map that is used as a background is dynamic (interactive). For example, a player steps in the water, and the water turns black. Every tile in the game does this. the tile map is the same object used for all players, but it is displayed differently on each user's mobile device, even though the players exist in the same world. For example, the water that turned black is displayed as red on all other players' screens. I have knowledge of java, but almost none regarding game dev. tools. Is there a best process for these requirements? Should I develop in pure java, or use some tool like Slick2D etc.? How performance intensive are these properties, if even possible? Edit: There are no collisions in the game or difficult animations, I imagining simply changing colors of the tiles like in the examples, and a client-server architecture

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  • Static "LoD" hack opinions

    - by David Lively
    I've been playing with implementing dynamic level of detail for rendering a very large mesh in XNA. It occurred to me that (duh) the whole point of this is to generate small triangles close to the camera, and larger ones far away. Given that, rather than constantly modifying or swapping index buffers based on a feature's rendered size or distance from the camera, it would be a lot easier (and potentially quite a bit faster), to render a single "fan" or flat wedge/frustum-shaped planar mesh that is tessellated into small triangles close to the near or small end of the frustum and larger ones at the far end, sort of like this (overhead view) (Pardon the gap in the middle - I drew one side and mirrored it) The triangle sizes are chosen so that all are approximately the same size when projected. Then, that mesh would be transformed to track the camera so that the Z axis (center vertical in this image) is always aligned with the view direction projected into the XZ plane. The vertex shader would then read terrain heights from a height texture and adjust the Y coordinate of the mesh to match a height field that defines the terrain. This eliminates the need for culling (since the mesh is generated to match the viewport dimensions) and the need to modify the index and/or vertex buffers when drawing the terrain. Obviously this doesn't address terrain with overhangs, etc, but that could be handled to a certain extent by including a second mesh that defines a sort of "ceiling" via a different texture. The other LoD schemes I've seen aren't particularly difficult to implement and, in some cases, are a lot more flexible, but this seemed like a decent quick-and-dirty way to handle height map-based terrain without getting into geometry manipulation. Has anyone tried this? Opinions?

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  • Search SSIS packages for table/column references

    - by Nigel Rivett
    A lot of companies now use TFS or some other system and keep all their packages in a single project. This means that a copy of all the packages will end up on your local disk. There is major failing with SSIS that it is sometimes quite difficult to find what a package is actually doing, what it accesses and what it affects. This is a simple dos script which will search through all packages in a folder for a string and write the names of found packages to an output file. Just copy the text to a .bat file (I use aaSearch.bat) in the folder with all the package scripts Change the output filename (twice), change the find string value and run it in a dos window. It works on any text file type so you can also search store procedure scripts – but there are easier ways of doing that. echo. > aaSearch_factSales.txt for /f “delims=” %%a in (‘dir /B /s *.dtsx’) do call :subr “%%a” goto:EOF :subr findstr “factSales” %1 if %ERRORLEVEL% NEQ 1 echo %1 >> aaSearch_factSales.txt goto:EOF

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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 should I show shared resources during a Shared Resource game in the Galaxy Editor?

    - by Mag Roader
    One of my favorite ways to play the original StarCraft was in a "Team" game. In this game type, multiple players on the same "team" would share control, resources, supply, and even the same starting location. It was like playing as 1 player, only 2 humans were controlling it. It was a lot of fun. I want to do something very similar in StarCraft 2, but I need to create a custom map in the Galaxy Editor to do it. I found the editor can quite easily emulate this behavior. There is a Trigger action "Set Alliance for Player Group" to "...treat each other as Ally With Shared Vision, Control, And Spending." To use this, I create units for only 1 of the players, and then set all players to be allied with each other in this way. All the other players get no units and no resources. This makes it so 1 player is the actual owner of all the units and everyone else is tagging along with full control. This nearly works! The problem is that if I am not the actual owning player, I can't actually see how many minerals/gas/supply the team has. This makes it pretty difficult to build stuff. What would be the best way to display to the other players how many Minerals/Gas/Supply the team has?

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  • Dealing with institutionalized programmers.

    - by Singleton
    Some times programmers who work in a project for long time tend to get institutionalized. It is difficult to convince them with reasoning. Even if we manage to convince them they will be adamant to take suggestion on board. How do we handle the situation without developing friction in team? Institutionalized in terms of practices. I recently joined in a project where build &release process was made so complicated with unnecessary roadblocks. My suggestion was we can get rid of some of the development overheads(like filling few spreadsheets) just by integrating defect management and version controlling tools (both are IBM-Rational tools integration can be very easy and one-off effort). Also by using tools like Maven & Ant (project involves java and some COTS products) build & release can be simplified and reduce manual errors& intervention. I managed to convince and ready to put efforts for developing proof of concept. But the ‘Senior’ developer is not willing to take it on board. One reason could be the current process makes him valuable in team.

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  • How to present a stable data model in a public API that allows internal data structures to be changed without breaking the public view of the data?

    - by Max Palmer
    I am in the process of developing an application that allows users to write C# scripts. These scripts allow users to call selected methods and to access and manipulate data in a document. This works well, however, in the development version, scripts access the document's (internal) data structures directly. This means that if we were to change the internal data model/structure, there is a good chance that someone's script will no longer compile. We obviously want to prevent this breaking change from happening, but still want to allow the user to write sensible C# code (whilst not restricting how we develop our internal data model as a result). We therefore need to decouple our scripting API and its data structures from our internal methods and data structures. We've a few ideas as to how we might allow the user to access a what is effectively a stable public version of the document's internal data*, but I wanted to throw the question out there to someone who might have some real experience of this problem. NB our internal document's data structure is quite complex and it could be quite difficult to wrap. We know we want to expose as little as possible in our public API, especially as once it's out there, it's out there for good. Can anyone help? How do scripting languages / APIs decouple their public API and data structures from their internal data structures? Is there no real alternative to having to write a complex interaction layer? If we need to do this, what's a good approach or pattern for wrapping complex data structures that include nested objects, including collections? I've looked at the API facade pattern, which looks like it's trying to address these kinds of issues, but are there alternatives? *One idea is to build a data facade that is kept stable across versions of our application. The facade exposes a set of facade data objects that are used in the script code. These maintain backwards compatibility and wrap access to our internal document's data model.

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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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  • Algorithm for dynamically calculating a level based on experience points?

    - by George
    One of the struggles I've always had in game development is deciding how to implement experience points attributed to gaining a level. There doesn't seem to be a pattern to gaining a level in many of the games I've played, so I assume they have a static dictionary table which contains experience points vs. the level. e.g. Experience Level 0 1 100 2 175 3 280 4 800 5 ...There isn't a rhyme or reason why 280 points is equal to level 4, it just is. I'm not sure how those levels are decided, but it certainly wouldn't be dynamic. I've also thought about the possibility of exponential levels, as not to have to keep a separate lookup table, e.g. Experience Level 0 1 100 2 200 3 400 4 800 5 1600 6 3200 7 6400 8 ...but that seems like it would grow out of control rather quickly, as towards the upper levels, the enemies in the game would have to provide a whopping amount of experience to level -- and that would be to difficult to control. Leveling would become an impossible task. Does anyone have any pointers, or methods they use to decide how to level a character based on experience? I want to be fair in leveling and I want to stay ahead of the players as not to worry about constantly adding new experience/level lookups.

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  • Statistical Software Quality Control References

    - by Xodarap
    I'm looking for references about hypothesis testing in software management. For example, we might wonder whether "crunch time" leads to an increase in defect rate - this is a surprisingly difficult thing to do. There are many questions on how to measure quality - this isn't what I'm asking. And there are books like Kan which discuss various quality metrics and their utilities. I'm not asking this either. I want to know how one applies these metrics to make decisions. E.g. suppose we decide to go with critical errors / KLOC. One of the problems we'll have to deal with with that this is not a normally distributed data set (almost all patches have zero critical errors). And further, it's not clear that we really want to examine the difference in means. So what should our alternative hypothesis be? (Note: Based on previous questions, my guess is that I'll get a lot of answers telling me that this is a bad idea. That's fine, but I'd request that it's based on published data, instead of your own experience.)

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  • Adding complexity by generalising: how far should you go?

    - by marcog
    Reference question: http://stackoverflow.com/questions/4303813/help-with-interview-question The above question asked to solve a problem for an NxN matrix. While there was an easy solution, I gave a more general solution to solve the more general problem for an NxM matrix. A handful of people commented that this generalisation was bad because it made the solution more complex. One such comment is voted +8. Putting aside the hard-to-explain voting effects on SO, there are two types of complexity to be considered here: Runtime complexity, i.e. how fast does the code run Code complexity, i.e. how difficult is the code to read and understand The question of runtime complexity is something that requires a better understanding of the input data today and what it might look like in the future, taking the various growth factors into account where necessary. The question of code complexity is the one I'm interested in here. By generalising the solution, we avoid having to rewrite it in the event that the constraints change. However, at the same time it can often result in complicating the code. In the reference question, the code for NxN is easy to understand for any competent programmer, but the NxM case (unless documented well) could easily confuse someone coming across the code for the first time. So, my question is this: Where should you draw the line between generalising and keeping the code easy to understand?

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