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  • Calculate initial velocity of a 3d vector-based projectile

    - by Frotty
    Okay, so I got a Projectile with 2 Vectors, position and velocity. I now want to calculate the initial velocity for it in order to reach a specific point on the map. Or actually, how high has the start z-velocity to be (because x and y are probably defined by a speed variable) in order for the projectile to hit the marked position. The projectile is influenced by a constant gravity vector. All calculations are done 32 times per second. I want this, because I don't want to use a parabola function, so the projectile can still be influenced by other sources, simply adding some velocity. I didn't really find anything referring to that topic and would be glad for every helping answer, Thanks.

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  • IBM présente cinq innovations IT qui pourraient changer la vie dans les cinq ans à venir

    IBM présente cinq innovations IT qui pourraient changer la vie Dans les cinq années à venir IBM vient de dévoiler, lors de la cinquième édition de son événement « Next Five in Five », cinq innovations technologiques qui pourraient changer la façon de travailler, de vivre et de jouer au cours des cinq prochaines années. IBM a observé les tendances actuelles, les nouvelles technologies développées et fait le point sur les recherches en cours dans ses laboratoire à travers le monde. S'appuyant sur ces observations, IBM pense pouvoir, dans cinq ans, nous offrir la possibilité d'interagir avec nos amis en 3D, alimenter nos batteries d'ordinateurs, portables et autres avec l'air que nous respir...

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  • How to structure my java packages

    - by MightyPork
    I have a Java library, quite a huge one. I'm asking regarding Best Practices of structuring the source. For example, the logging sybsystem: Option 1: All in one package, named to sort nicely Log - static accessor LogMonitor - interface for log minotor LogMonitorBase - abstract class LogMonitorStdout - print log to console LogWriter - interface for file logger LogWriterSimple - log writer with just one log file LogWriterArchiving - log writer that handles old log files Option 2: Subpackages for Monitors and Writers, with better names Log monitors/LogMonitor monitors/BaseMonitor monitors/StdoutMonitor writers/LogWriter writers/SimpleLog writers/ArchivingLog The second maybe looks better, but perhaps it's not so practical from the java point of view (two extra packages). What do you suggest as the best practice here? A lot in one package, grouped by naming prefixes, or a lot of subpackages with better names?

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  • Photobooth.js : le framework JavaScript permet d'ajouter un système de webcam à un site Web en utilisant HTML5

    Photobooth.js : le framework JavaScript permet d'ajouter un système de webcam à un site Web en utilisant HTML5 Le HTML5, le futur standard du Web vient de révéler une fois de plus l'une de ses nombreuses facettes. Un développeur indépendant a exploité les nouveautés du langage pour mettre au point Photobooth.js, une bibliothèque open source en JavaScript qui permet d'intégrer dans un site Web assez aisément un système de prise de photo par webcam. Photobooth s'appuie sur la méthode getUserMedia du framework audio et vidéo open source WebRTC, qui est actuellement en cours de standardisation par le W3C comme une partie du HTML5. Photobooth.js permet de prendre dire...

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  • Restricted pathfinding Area

    - by SubZeron
    So i'm triying to create a little "XCOM : Enemy Unknown" like game ,and using the Aron Granberg's Pathfinding-Tool (free version) to handle the "click to move part. i want to add a little trap system where the hero get stuck inside an area, so he will have only the possibility to move inside this trapped area, so far everything is fine however when i click outside the trapped area, the hero try to reach the destination even though the wall will prevents him from reaching it. so my question is, is there any way to restrict the area where the pathfinding system work to the trapped area dynamically. and wich Graph Type is recommended to use in this situation or this kind of Games (Grid Graph/Navmesh Graph/Point Graph). Thank you. image link for explanation : https://dl.dropbox.com/u/77993668/exemple.jpg

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  • Expression Engine vs Drupal for Theming

    - by user793011
    Ive been using Drupal for years and now with work need to learn Expression Engine. Im interested in the comparison of Drupal and Expression Engine, but purely from a theming point of view (Ive no doubt Drupal is more powerful for development). Does anyone have any insights? It seems EE does give you more control over the exact html outputted, but is this necessary? I design my graphics first and Ive always been able to make exactly what I wanted in Drupal (some theme overrides could be easier, but ive got there in the end). Thanks

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  • How do I get a Line6 UX1 soundcard to work?

    - by the_drow
    I own a Line6 UX1 soundcard and I would like to make it work for Ubuntu. I have followed the instructions here and it worked. But at some point I upgraded my kernel version (not sure what uname -a prints but it's related) and it stopped working. Here's what uname -a prints: Linux ubuntu 2.6.32-29-generic #58-Ubuntu SMP Fri Feb 11 20:52:10 UTC 2011 x86_64 GNU/Linux I figured out that maybe it's installed per version so I used svn update and hit make again. My guess was right as it copied the relevant files to the new version's folder. I restarted and still nothing. Should I revert to an older version? Or is there a solution here?

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  • Distorted text in programs

    - by Teneff
    I've installed Ubuntu 11 with gnome and in some point the text in the programs becomes unreadable like this. It's not only the text, but even the desktop background looks awful. I've tried to add section in xorg.conf, but it didn't helped out. Section "Device" Identifier "g33/X3000" Driver "intel" BusID "PCI:0:2:0" Option "ModeDebug" "on" Option "MonitorLayout" "LCD,VGA" Option "DevicePresence" "true" EndSection And this is what the lshw returns about the VGA *-display description: VGA compatible controller product: 82945G/GZ Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 02 width: 32 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:16 memory:dfe00000-dfe7ffff ioport:8800(size=8) memory:e0000000-efffffff memory:dfe80000-d$

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  • Different set of workspaces for each monitor? Ubuntu 13.04 with Unity

    - by Darren
    currently for my new setup, I have a 3 monitor setup. With an NVIDIA Geforce GTX 770(if this matters for this). What I'm wanting to do, is to create a separate set of workspaces for each monitor. For instance: Monitor 1 has a set of 4 workspaces, that are specific to monitor 1, and change independently of the other monitors. Then the other 2 monitors also have their own set of 4 workspaces. So in total I would have 12 workspaces, but each monitor would have it's own set of 4 that work independently from the others. I've read things about Xmonad and Xinerama, but I'm not really sure where to go from here. I haven't ventured to far into different window managers and everything. I'm sure there's not a tool that does this, but if someone could point me in the right direction(I've been using Ubuntu for about 4 years so I can figure some things out on my own too).

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  • What is the correct frequency of changing content regularly?

    - by SSRB
    What is the correct frequency of changing content regularly? Suppose I have a site "Seven Sea" having 5 links name as Home, About Us, Product, Sitemap, Contact Us. It is good for site to change the site content regularly. But is there is any minimum and maximum frequency for do this job. Suppose I do change my content daily then is that good for SEO point of view. OR suppose I change my content once in a year Is that bad for SEO. What is best or more better choice? A REQUEST: If this type of question already answered then give me that answered link and do not close the question.

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  • Windows Communication Foundation 4 - ISBN - Initial Comments

    - by TATWORTH
    Windows Communication Foundation 4 - ISBN 978-0-7356-4556-1 is one of the Microsoft Step-By-Step books. I will be studying this book over the comming weeks. What I have seen so far impresses me. One very practical item that more books of the type should have was the "Finding your best starting point". There is one feature about this book that I hope Microsoft Press will provide on more books and that is to also provide the book electronically via Safari. Included in this is getting the book as a PDF!

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  • Google search results page titles "hijacked" by porn

    - by rfoote
    Sorry, that title probably doesn't make much sense. Over the past couple of weeks, we've noticed that the search results from Google for some of our drupal-powered sites are having their page titles hijacked somehow. An example would be: free streaming porn - [Actual page title] There are other variations of the porn prefix, that's one of the more tame ones. I looked in the databases for each of these sites and the titles haven't actually been changed or anything along those lines. When you click on the result to visit the page everything looks normal (sans porn stuff). Would anyone be able to point me in the right direction as to what the cause of this is? Searching Google for the potential problem isn't being much help, yet. Thanks in advance!

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  • Does Ubuntu 12.04 supports for B75 boards?

    - by rail02000
    I want to build a new computer with Intel G840 CPU and Gigabyte B75M-D3H motherboard and install Ubuntu (or Kubuntu) 12.04 64bit on it. However, I'm worried about whether the chip is too new and whether that Linux Kernel now has support for it. According to the article [Phoronix] Intel Core i7 3770K Ivy Bridge Linux Performance Review ,the Linux kernel is ready to work on the chip. Existing Intel Sandy Bridge motherboards/chipsets are compatible with Ivy Bridge processors, but earlier this month Intel launched the new Panther Point chipsets that are already compatible with Linux too: the B75, H77, Z75, Z77, HM75, HM76, UM77, and HM77. But I didn't find further information or cases about running Ubuntu on the chip. So,is it OK to run Ubuntu on the board? Do I need to upgrade the kernel to a newer version (3.4 or 3.5 etc.) to get the system more smoothly? Or should I choose boards with H61 chip? Thank for your response!

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  • Windows 7 and 11.10 side by side from scratch what am I doing wrong?

    - by Bill.Caffery
    I have tried everything I can think of at this point and I'm at a total loss. I have a 2TB drive I want to install Windows 7 and 11.10 (both are 64 bit) side by side, but once I install Windows it must need gpt to work or something because no matter how many times I've removed it, it always returns. If I use gdisk and set the disk as mbr, Windows won't load. Now this last time I ran gdisk and tried to boot into Windows before I installed Ubuntu all the way and ended up at a grub rescue prompt. Any help please? Also let me say I have been searching and reading for days and have tried everything I can find to make this work so this isn't a one time event, it's continual.

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  • What's the reason exceptions are heavily used in managed (C# and Java) languages but not in C++? [on hold]

    - by ZijingWu
    AFAIK, a lot of C++ projects don't allow exceptions and deny them in coding guidelines. I have a lot of reasons, for example, exception is hard to handle correctly if your binary needs to be compiled by separate and different compilers. But it doesn't fully convince me, there is a lot of projects which are just using one compiler. Compared to C++, exceptions are heavily used in C# and Java and the reason can only be that exception are not bringing enough benefit. One point is debugbility in practice. Exception can not get the call stack in C++ code, but in C# and Java you can get the call stack from exception, it is significant and makes debugging easier. No-callstack is not the fault of the exception, it is the language difference, but it impacts the exception usage. So what's the reason that exceptions are frowned upon in c++ programs?

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  • Credit Card Payment Processing which APIs do you use?

    - by user3330840
    It's for a Point of Sale Terminal where the customer will bring the physical credit card and it will be swiped through the terminal. The business has a merchant account on some banks. So, how do I start accepting credit cards in my app? The credit cards that needs to be accepted include: visa, master-card, amex, discover. Which APIs do I need to use? The programming language doesn't matter it can be in any programming languages Java/C#/C++/Python or anything. Will there be a single API or multiple APIs that need to be integrated? (I know some about PCI compliance and security encryption)

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  • New release for the Visual Studio 2010 and .NET Framework 4 Training Kit

    - by Enrique Lima
    Among the new content in the release, is a set of ALM docs and labs. The ALM content referenced above is: o Using Code Analysis with Visual Studio 2010 to Improve Code Quality o Introduction to Exploratory Testing with Microsoft Test Manager 2010 o Introduction to Platform Testing with Microsoft Test Manager 2010 o Introduction to Quality Tracking with Visual Studio 2010 o Introduction to Test Planning with Microsoft Test Manager 2010 All ALM labs point to the latest version of the VS 2010 RTM VM. You can download the Training Kit from :  http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=23507 Visit the online content: http://msdn.microsoft.com/en-us/VS2010TrainingCourse Download the most recent version of the Visual Studio: http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=240

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  • One man software developer product success stories? [on hold]

    - by EugeneKr
    I've got a bad feeling that this question is not appropriate here.. Hopefully you can point me to the right place to ask such a thing (not google though, been there). I want to create my own product, but for some reason have no ideas, so decided to see what people have already done. I would like to start by myself too. I don't mind expanding, but at later stages when it is absolutely necessary. Anyway, to give you an example. There is a guy who created bingo card generation software, then somebody made a wedding planner software and they seem to be doing pretty fine. I would like to know more such cases to draw inspiration from. Do you know such people or maybe you are one of them? Also, if there are places on the net where they dwell, don't hesitate to tell me :) Thanks!

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  • Does tweeting 9 to 5 hurt job applicants?

    - by evadeflow
    If you were looking into a job applicant's background and discovered that he or she has 1200 followers on Twitter and averages 50 tweets per day (more than half of which are during business hours), would it affect your hiring decision? How and why? Personally, I'd be a little worried about the candidate's ability to focus on the job at hand if they're constantly checking in with their 'tweeps' thoughout the day. In non-tech jobs, a lot of companies simply block Twitter as an irrelevant distraction. But it can be a useful resource---to programmers in particular. I just wonder how much is too much. At what point does it become a red flag?

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  • How to structure an application which reads UPC barcodes

    - by tugberk
    I have no previous experience on creating a project for a seller which will use barcode reader. I am trying to put together a small project but I cannot figure out how the pieces should glue together. I will create a sample with Motorola Scanner SDK to read barcodes and from that point, I have couple of questions: How UPC barcodes work in general? AFAIK, a barcode stores the manufacturer and product info but no price data. Should I store price information inside a database which corresponds to barcode data? I would really appreciate if you can guide me here.

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  • Graphiste.com : un site qui s'occupe de l'identité visuelle de vos applications et sites et met en compétition de nombreuses propositions

    Graphiste.com : un site qui s'occupe de l'identité visuelle de votre application Ou de votre site, 10% de réduction pour les lecteurs de Developpez.com avec le code DEV10 Il y a deux mois, nous lancions un débat sur le fait de savoir si un développeur peut réaliser un bon design Web sans être lui-même un Web-designer. Plus largement, c'est toute la question d'une identité graphique qui est posée. Un point qui est souvent mis de côté dans l'IT et qui est pourtant crucial. Le logo d'une entreprise ? souvent repris pour son application (cf. Facebook, Instagram, etc.) ? permet en effet de se différencier au premier co...

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  • Top Down bounds of vision

    - by Rorrik
    Obviously in a first person view point the player sees only what's in front of them (with the exception of radars and rearview mirrors, etc). My game has a top down perspective, but I still want to limit what the character sees based on their facing. I've already worked out having objects obstruct vision, but there are two other factors that I worry would be disorienting and want to do right. I want the player to have reduced peripheral vision and very little view behind them. The assumption is he can turn his head and so see fairly well out to the sides, but hardly at all behind without turning the whole body. How do I make it clear you are not seeing behind you? I want the map to turn so the player is always facing up. Part of the game is to experience kind of a maze and the player should be able to lose track of North. How can I turn the map rather than the player avatar without causing confusion?

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  • How to deal with readers requesting free advice / support on my blog? [closed]

    - by russau
    I have a handful of popular articles on my blog (nothing huge), and they attract the occasional developer who wants help implementing some code grabbed from my blog. Now I'm getting people who haven't made any attempt to learn the code, email me their code, and expect me to trace it through for them. I'm sure anyone with a half-popular blog gets similar requests. What's the best way to deal with this scenario? I want to put together a boilerplate response including these points: How far have you gone with this on your own? (is it any benefit for anyone if I say they are being imposing) I'm happy to help with any problems you find in my code Point them to other forms of help such as stackoverflow, diagnostic tools relevant to the topic.

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  • writing an autopilot for a 2d game with newtonian physics

    - by Jargo
    The subject says it all. I am making a 2d space game with newtonian physics and I need pointers on how to write an autopilot for it. The requirements are best explained by an example. There is a target object which has speed- and position-vectors and there a spaceship that is controlled by the autopilot. This spaceship also have speed, position and maximum acceleration. The autopilot needs to control the ship that it either collides with the target, Or intercepts the target so that the ship has matching speed and position with the target. Could someone give me some pointers how to achieve this behavior or perhaps even an ready implementation? I am sure someone has written something like this before and there is no point in reinventing the wheel.

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  • How long till HTML5 canvas becomes a viable game development platform?

    - by Shouvik
    So I have been working on web application. So invariably what it boils down to is making simple games which were previously based on flash or openGL. Now I know apple was moving away from flash because its proprietary unlike their stance that its got "pathetic performance"! Not true, try playing a canvas game, I can assure you at any point of time (including when its idle) it will use up a fair bit of processing power just to redraw the UI. Now I do understand that this is my fault because when the game is not active I should not be redrawing the canvas, but honestly its a lot of work and I suppose there should be libraries which should be able to assist me with that! So, how much will it be before I see a decent canvas library which handles these "tiny" issues for me? I can't honestly expect Steve Jobs to be doing anything more for HTML5! I someone knows of a good library, I am all ears...! :) PS: I use mootools and am presently using Mootools Canvas Library.

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