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  • Simulating an object floating on water

    - by Aaron M
    I'm working on a top down fishing game. I want to implement some physics and collision detection regarding the boat moving around the lake. I would like for be able to implement thrust from either the main motor or trolling motor, the effect of wind on the object, and the drag of the water on the object. I've been looking at the farseer physics engine, but not having any experience using a physics engine, I am not quite sure that farseer is suitable for this type of thing(Most of the demos seem to be the application of gravity to a vertical top/down type model). Would the farseer engine be suitable? or would a different engine be more suitable?

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  • #DAX Query Plan in SQL Server 2012 #Tabular

    - by Marco Russo (SQLBI)
    The SQL Server Profiler provides you many information regarding the internal behavior of DAX queries sent to a BISM Tabular model. Similar to MDX, also in DAX there is a Formula Engine (FE) and a Storage Engine (SE). The SE is usually handled by Vertipaq (unless you are using DirectQuery mode) and Vertipaq SE Query classes of events gives you a SQL-like syntax that represents the query sent to the storage engine. Another interesting class of events is the DAX Query Plan , which contains a couple...(read more)

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  • SEO Techniques to Be Used by Every Website

    Search engine optimization is the buzz word in the world of internet. Every website wants to rank high in the search engine listings. There are different techniques and measures that you can take up for the process of search engine optimization. Here are some sure shot techniques that every website should apply in order to rank high.

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  • How does Starcraft 2 load it's metadata?

    - by chobok
    Lets say you are playing Starcraft 2 melee map. The game loads the map. Melee maps have the following dependencies: Liberty (Mod) Liberty Multi (Mod) I think the game engine will load the data from Liberty (Mod) first, then from Liberty Multi (Mod). For data that exists in both dependencies, the engine will use the one from Liberty Multi (Mod). Is this correct? Liberty Multi (Mod) is updated with each patch of Starcraft 2. Does the game engine load just the latest version of Liberty Multi (Mod)? or Does the game engine load all the versions and overwrite duplicate data with the latest version?

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  • SEO As the Online Business Traffic Driver

    The SEO means that the online business marketer can drive his site or blog to the top places at the search engine result pages with the selected keywords. This requires, that a marketer knows the search engine algorithm, i.e. according to which criteria the engine will put the sites in a certain order.

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  • Distributed Rendering in the UDK and Unity

    - by N0xus
    At the moment I'm looking at getting a game engine to run in a CAVE environment. So far, during my research I've seen a lot of people being able to get both Unity and the Unreal engine up and running in a CAVE (someone did get CryEngine to work in one, but there is little research data about it). As of yet, I have not cemented my final choice of engine for use in the next stage of my project. I've experience in both, so the learning curve will be gentle on both. And both of the engines offer stereoscopic rendering, either already inbuilt with ReadD (Unreal) or by doing it yourself (Unity). Both can also make use of other input devices as well, such as the kinect or other devices. So again, both engines are still on the table. For the last bit of my preliminary research, I was advised to see if either, or both engines could do distributed rendering. I was advised this, as the final game we make could go into a variety of differently sized CAVEs. The one I have access to is roughly 2.4m x 3m cubed, and have been duly informed that this one is a "baby" compared to others. So, finally onto my question: Can either the Unreal Engine, or Unity Engine make it possible for developers to allow distributed rendering? Either through in built devices, or by creating my own plugin / script?

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  • Should EICAR be updated to test the revision of Antivirus system?

    - by makerofthings7
    I'm posting this here since programmers write viruses, and AV software. They also have the best knowledge of heuristics and how AV systems work (cloaking etc). The EICAR test file was used to functionally test an antivirus system. As it stands today almost every AV system will flag EICAR as being a "test" virus. For more information on this historic test virus please click here. Currently the EICAR test file is only good for testing the presence of an AV solution, but it doesn't check for engine file or DAT file up-to-dateness. In other words, why do a functional test of a system that could have definition files that are more than 10 years old. With the increase of zero day threats it doesn't make much sense to functionally test your system using EICAR. That being said, I think EICAR needs to be updated/modified to be effective test that works in conjunction with an AV management solution. This question is about real world testing, without using live viruses... which is the intent of the original EICAR. That being said I'm proposing a new EICAR file format with the appendage of an XML blob that will conditionally cause the Antivirus engine to respond. X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-EXTENDED-ANTIVIRUS-TEST-FILE!$H+H* <?xml version="1.0"?> <engine-valid-from>2010-1-1Z</engine-valid-from> <signature-valid-from>2010-1-1Z</signature-valid-from> <authkey>MyTestKeyHere</authkey> In this sample, the antivirus engine would only alert on the EICAR file if both the signature or engine file is equal to or newer than the valid-from date. Also there is a passcode that will protect the usage of EICAR to the system administrator. If you have a backgound in "Test Driven Design" TDD for software you may get that all I'm doing is applying the principals of TDD to my infrastructure. Based on your experience and contacts how can I make this idea happen?

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  • Developing Schema Compare for Oracle (Part 4): Script Configuration

    - by Simon Cooper
    If you've had a chance to play around with the Schema Compare for Oracle beta, you may have come across this screen in the synchronization wizard: This screen is one of the few screens that, along with the project configuration form, doesn't come from SQL Compare. This screen was designed to solve a couple of issues that, although aren't specific to Oracle, are much more of a problem than on SQL Server: Datatype conversions and NOT NULL columns. 1. Datatype conversions SQL Server is generally quite forgiving when it comes to datatype conversions using ALTER TABLE. For example, you can convert from a VARCHAR to INT using ALTER TABLE as long as all the character values are parsable as integers. Oracle, on the other hand, only allows ALTER TABLE conversions that don't change the internal data format. Essentially, every change that requires an actual datatype conversion has to be done using a rebuild with a conversion function. That's OK, as we can simply hard-code the various conversion functions for the valid datatype conversions and insert those into the rebuild SELECT list. However, as there always is with Oracle, there's a catch. Have a look at the NUMTODSINTERVAL function. As well as specifying the value (or column) to convert, you have to specify an interval_unit, which tells oracle how to interpret the input number. We can't hardcode a default for this parameter, as it is entirely dependent on the user's data context! So, in order to convert NUMBER to INTERVAL DAY TO SECOND/INTERVAL YEAR TO MONTH, we need to have feedback from the user as to what to put in this parameter while we're generating the sync script - this requires a new step in the engine action/script generation to insert these values into the script, as well as new UI to allow the user to specify these values in a sensible fashion. In implementing the engine and UI infrastructure to allow this it made much more sense to implement it for any rebuild datatype conversion, not just NUMBER to INTERVALs. For conversions which we can do, we pre-fill the 'value' box with the appropriate function from the documentation. The user can also type in arbitary SQL expressions, which allows the user to specify optional format parameters for the relevant conversion functions, or indeed call their own functions to convert between values that don't have a built-in conversion defined. As the value gets inserted as-is into the rebuild SELECT list, any expression that is valid in that context can be specified as the conversion value. 2. NOT NULL columns Another problem that is solved by the new step in the sync wizard is adding a NOT NULL column to a table. If the table contains data (as most database tables do), you can't just add a NOT NULL column, as Oracle doesn't know what value to put in the new column for existing rows - the DDL statement will fail. There are actually 3 separate scenarios for this problem that have separate solutions within the engine: Adding a NOT NULL column to a table without a rebuild Here, the workaround is to add a column default with an appropriate value to the column you're adding: ALTER TABLE tbl1 ADD newcol NUMBER DEFAULT <value> NOT NULL; Note, however, there is something to bear in mind about this solution; once specified on a column, a default cannot be removed. To 'remove' a default from a column you change it to have a default of NULL, hence there's code in the engine to treat a NULL default the same as no default at all. Adding a NOT NULL column to a table, where a separate change forced a table rebuild Fortunately, in this case, a column default is not required - we can simply insert the default value into the rebuild SELECT clause. Changing an existing NULL to a NOT NULL column To implement this, we run an UPDATE command before the ALTER TABLE to change all the NULLs in the column to the required default value. For all three, we need some way of allowing the user to specify a default value to use instead of NULL; as this is essentially the same problem as datatype conversion (inserting values into the sync script), we can re-use the UI and engine implementation of datatype conversion values. We also provide the option to alter the new column to allow NULLs, or to ignore the problem completely. Note that there is the same (long-running) problem in SQL Compare, but it is much more of an issue in Oracle as you cannot easily roll back executed DDL statements if the script fails at some point during execution. Furthermore, the engine of SQL Compare is far less conducive to inserting user-supplied values into the generated script. As we're writing the Schema Compare engine from scratch, we used what we learnt from the SQL Compare engine and designed it to be far more modular, which makes inserting procedures like this much easier.

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  • Should I use OpenGL or DX11 for my game?

    - by Sundareswaran Senthilvel
    I'm planning to write a game from scratch (a BIG Game, for commercial purpose). I'm aware that there are certain compute libraries like OpenCL, AMD APP SDK, C++ AMP as well as DirectCompute - both from MS (NOT interested in CUDA) are available in the market. I'm planning to write the game from the scratch, which includes the following engines... Physics Engine AI Engine Main Game Engine (... and if anything is missed). I'm aware that, there are some free physics engine libraries in the market. Not sure about free AI engine libraries. I'm bit confused in choosing between the OpenCL, AMD APP SDK, and C++ AMP libraries (as already mentioned i'm NOT interested in CUDA). I want my game to be published in Windows/Android/Mac OSX. It means it should be a cross-platform game. I will be having "one source code" that i'll compile for various platforms like Windows/Android/Mac OSX, and any others if i missed. Note: Since I'm NOT a Java guy, kindly do NOT suggest me the Java Language. For Graphics language should i use OpenGL or DirectX 11? I have heard that OpenGL runs on a single core, and not sure of DirectX 11. Between OpenGL and DirectX which one should i follow? or else, are there any other graphics language that i need to start with? I want to make use of the parallelism in GPU as well as CPU.

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  • Legitimate SEO Strategies - Which to Follow and Not to Follow?

    There are various SEO techniques which can help your business to get recognition on the internet. These techniques are mainly divided into two categories i.e. legitimate search engine optimization and illegitimate search engine optimization. Using legitimate search engine optimization techniques will guarantee a top spot and there will be nothing at risk. Whereas the illegitimate SEO has many risks attached to it.

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  • Learning About SEO

    SEO stands for Search Engine Optimization. It is a way of doing good things on your site by making it friendly to the search engine crawler. Most of the search engine optimization (SEO) specialists devoted most of their time in making a certain website be on top of the search results in Google and Yahoo!, etc.

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  • SEO Niche

    Search Engine Optimizers have become of particular interest to many people who wish to divert more traffic to their websites. With search engine optimizers, one can get his website to the top rankings of many search engine website lists. This is done through a variety of ways. One of the more popular ways to optimize one's website and gain more traffic is to reciprocally link his or her website to another.

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  • The Importance of Choosing the Right Keyword For SEO

    Search engine optimization or SEO simply means the best use of the search engines to drive traffic to the desired web site. It basically revolves around techniques of attaining higher ranks in directories and search engines through making changes in the site so that it becomes this engine compatible. Search engine optimization as today evolved as a paramount for businesses as more and more companies are choosing and backing on the internet to develop footage in their respective industry or the market.

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  • Complete Link Building Strategies

    Link building is essential for ranking the site on the search engine. The page ranking on the search engine is influenced by the number of backlinks to the site. The higher the amount of backlinks pointing to the site, the higher chances it will rank on the search engine. There are plenty of ways to build the backlinks of a website.

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  • Getting Your Site PR Increased With Back Link Swap Forums

    Site PR or Page Rank is a useful search engine optimisation (SEO) method to increase the visibility of your website in the Google search engine. The page rank is used by search engine Google to organise websites in their relevance and popularity. The page rank system ranks websites on a scale of 0 to 10 (with ten being the most popular).

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  • SEO Importance

    SEO is an abbreviation of Search Engine Optimization. It is the process of optimizing a website according to search engine likely rules and procedures which helps any website in gaining some position in search engine index which helps in getting targeted traffic and increasing site or business revenue.

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  • On Page Optimization Services

    On page optimization is the basic and important step in search engine optimization techniques. These are related to the content and the structure of the website. Implementing on page optimization is an easy task and this makes your website search engine friendly. By doing this on page optimization properly we can get good search engine rankings of our website and also it increases the overall readability of the website to the visitors.

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  • Observer Pattern Implementation

    - by user17028
    To teach myself basic game programming, I am going to program a clone of Pong. I will use the Observer design pattern, with an interface between the input and the game engine. However, I'm not sure what the interface should do. One idea I had was for the input interface to tell the game engine that (e.g.) the screen was clicked, then to let the game engine decide what to do with that information (shoot a bullet, for example). Another idea I had was for the input interface, having caught the mouse click, to tell the game engine to shoot a bullet. Which method would be better for me to use?

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  • 5 Basic SEO Tips For Any Online Business

    Any SEO tips you can get should be considered of value to your online business since it increases your ability to attract search engine traffic. This is what search engine optimizing is all about, traffic! Read more to discover 5 simple yet highly effective tips you can use to insure you receive your fair share of search engine traffic.

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  • Why is Link Building Important in SEO?

    When it comes to search engine optimization (also known as SEO), content is king and link building is queen. What actually is link building? How does it impact a search engine optimization project and help improve search engine rankings and traffic to your website?

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  • Free Keyword Research Software

    Keywords are the basis of all search engine rankings. The users enter some keyword phrases into a search engine to get the information they want. You need to find the best Search Engine Optimization (SEO) keywords that help to bring targeted traffic to your site and thereby aid to increase your sales.

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  • SEO Copywriting - What is it?

    Search engine optimization copywriting, more commonly called SEO copywriting, is the technique of writing the text of a webpage in a way that is enjoyable and easy to read for the common internet surfer. The term also refers to targeting and using specific search terms with the goal of ranking the targeted terms higher on the list of search engine websites. The point of obtaining a higher search engine ranking is to make your site more accessible to potential clients.

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  • SEO Metrics Tools - The Latest Craze

    We all know that Search Engine Optimization is the latest craze everywhere in the world of e-commerce. But this SEO is actually part of Search Engine Marketing or SEM where the promotion of any official website is being carried by increasing the number of visibility in the search engine result pages with the help of SEO.

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