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  • Getting developers and support to work together

    - by Matt Watson
    Agile development has ushered in the norm of rapid iterations and change within products. One of the biggest challenges for agile development is educating the rest of the company. At my last company our biggest challenge was trying to continually train 100 employees in our customer support and training departments. It's easy to write release notes and email them to everyone. But for complex software products, release notes are not usually enough detail. You really have to educate your employees on the WHO, WHAT, WHERE, WHY, WHEN of every item. If you don't do this, you end up with customer service people who know less about your product than your users do. Ever call a company and feel like you know more about their product than their customer service people do? Yeah. I'm talking about that problem.WHO does the change effect?WHAT was the actual change?WHERE do I find the change in the product?WHY was the change made? (It's hard to support something if you don't know why it was done.)WHEN will the change be released?One thing I want to stress is the importance of the WHY something was done. For customer support people to be really good at their job, they need to understand the product and how people use it. Knowing how to enable a feature is one thing. Knowing why someone would want to enable it, is a whole different thing and the difference in good customer service. Another challenge is getting support people to better test and document potential bugs before escalating them to development. Trying to fix bugs without examples is always fun... NOT. They might as well say "The sky is falling, please fix it!"We need to over train the support staff about product changes and continually stress how they document and test potential product bugs. You also have to train the sales staff and the marketing team. Then there is updating sales materials, your website, product documentation and other items there are always out of date. Every product release causes this vicious circle of trying to educate the rest of the company about the changes.Do we need to record a simple video explaining the changes and email it to everyone? Maybe we should  use a simple online training type app to help with this problem. Ultimately the struggle is taking the time to do the training, but it is time well spent. It may save you a lot of time answering questions and fixing bugs later. How do we efficiently transfer key product knowledge from developers and product owners to the rest of the company? How have you solved these issues at your company?

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  • Sitronix ST9RM01 touchscreen not working

    - by Josh Kelley
    I have a Sitronix ST9RM01 touchscreen that I'm trying to get working with Ubuntu 12.04. The touchscreen is apparently recognized by Linux and X - the hid_multitouch module is loaded, and lsinput and xinput both list the touchscreen as an input device - but touching the screen does absolutely nothing, and xinput test shows no events. The same touchscreen works just fine in Windows. How can I troubleshoot from here? Any suggestions?

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  • Micro Focus lance Enterprise Developer Personal Edition, un outil gratuit pour le développement d'applications mainframe IBM

    Micro Focus lance Enterprise Developer Personal Edition Un outil gratuit pour le développement d'applications mainframe IBM Micro Focus, l'éditeur de solutions de gestion, de test et de modernisation d'applications d'entreprise, vient de sortir son IDE gratuit Enterprise Developer Personal Edition destiné aux développeurs professionnels et aux étudiants en informatique pour les applications mainframe IBM. Il s'agit en fait de la version d'entrée de gamme, très facile à utiliser, de la solution complète Micro Focus Enterprise Developer. Elle s'intègre à Eclipse ou Visual Studio pour en faire des outils de développement d'applications mainframe distribuées. Cette éditi...

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  • Friday Fun: 3 Slices

    - by Asian Angel
    Your weekend is almost here, so why not get an early start on the fun with a quick bit of gaming goodness? In this week’s game your powers of division will be put to the test as you seek to clear each level of red box material using a limited number of slices. How to Make the Kindle Fire Silk Browser *Actually* Fast! Amazon’s New Kindle Fire Tablet: the How-To Geek Review HTG Explains: How Hackers Take Over Web Sites with SQL Injection / DDoS

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  • Weird referral traffic [closed]

    - by Noam
    Possible Duplicate: Strange incoming links appearing on site statistics I'm getting weird traffic from Japan, from a site called ime.nu Why weird? because I'm not able to identify the link and also when going to their homepage link it just shows an Apache Test Page, while I'm seeing it is a pretty big site in analysis sites (Alexa Ranked 121 in JP) Can someone help me understand the mystery?

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  • Fedora 13 Alpha released

    <b>Test-Announce:</b> " The Fedora 13 "Goddard" Alpha release is available! What's next for the free operating system that shows off the best new technology of tomorrow? You can see the future now..."

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  • sell skimmed dump+pin([email protected])wu transfer,bank transfer,paypal+mailpass

    - by bestseller
    http://megareserve.blogspot.com///////// [email protected]////gmail:[email protected] Sell, Cvv, Bank Logins, Tracks, PayPal, Transfers, WU, Credit Cards, Card, Hacks, Citi, Boa, Visa, MasterCard, Amex, American Express, Make Money Fast, Stolen, Cc, C++, Adder, Western, Union, Banks, Of, America, Wellsfargo, Liberty, Reserve, Gram, Mg, LR, AlertPay ..PAYMENT METHOD LIBERTYRESERVE AND WESTERNUNION ONLY........ Ccv EU is $ 6 per ccv (Visa + Master) Ccv EU is $ 7 per ccv (Amex + Discover) Ccv Au is $ 6 per ccv Ccv Italy is 15 $ per cc sweden 12$ spain 10$ france 12$ Ccv US is $ 1.5 per ccv (Visa) Ccv US is $ 2 per ccv (master) Ccv US is $ 3 per ccv (Amex + Discover) Ccv UK is $ 5 per ccv (Visa + Master) Ccv UK is $ 6 per ccv (Amex + swith) Ccv Ca is $ 6 per ccv (Visa+ Master) Ccv Ca is $ 9 per ccv (Visa Business + Visa Gold) Ccv Germany is 14$ Per Ccv Ccv DOB with US is 15 $ per ccv Ccv DOB with UK is 19 $ per ccv Ccv DOB + BIN with UK 25$ per ccv Ccv US full info is 40 $ per ccv Ccv UK full info is 60 $ per ccv 1 Uk check bins= 12.5$/1cvv 1 Sock live = 1$/1sock live 5day yahoo:[email protected] gmail:[email protected] Balance In Chase:.........70K To 155K ========300$ Balance In Wachovia:.........24K To 80K==========180$ Balance In Boa..........75K To 450K==========400$ Balance In Credit Union:.........Any Amount:=========420$ Balance In Hallifax..........ANY AMOUNT=========420$ Balance In Compass..........ANY AMOUNT=========400$ Balance In Wellsfargo..........ANY AMOUNT=========400$ Balance In Barclays..........80K To 100K=========550$ Balance In Abbey:.........82K ==========650$ Balance in Hsbc:.........50K========650$ and more 1 Paypal with pass email = 50$/paypal 1 Paypal don't have pass email = 20$/Paypal 1 Banklogin us or uk (personel)= 550$ yahoo :[email protected] gmail :[email protected] Track 1/2 Visa Classic, MasterCard Standart US - 13$ UK - 17$ EU - 24$ AU - 26$ Track 1/2 Visa Gold | Platinum | Business | Signature, MasterCard Gold | Platinum US - 17$ UK - 20$ EU - 28$ AU - 30$ Bank transfer Balance 71.000$ CITIBANK SOUTH DAKOTA, N.A. Balance 65.000$ Wachovia: 76.000$ Abbey: 65.000£ Hsbc : 87.000$ Hallifax : 97.000£ Barclays: 110.000£ AHLI UNITED BANK --- 80.000£ LLOYDSTSB ---------- 100.000£ BANK OF SCOTLAND --- 123.000£ BOA ----------210.000$ UBS ---------- 152.000$ RBC BANK ------ 245.000$ BANK OF CANADA -------- 78.000$ BDC ---------- 281.000$ BANK LAURENTIENNE ----- 241.000$ please no test yahoo: [email protected] gmail: [email protected] website ; http://megareserve.blogspot.com Prices For Bin and Its List: 5434, 5419, 4670,374288,545140,454634,3791 with d.o.b,4049,4462,4921.4929.46274547,5506,5569,5404,5031,4921, 5505,5506,4921,4550 ,4552,4988,5186,4462,4543,4567 ,4539,5301,4929,5521 , 4291,5051,4975,5413 5255 4563,4547 4505,4563 5413 5255,5521,5506,4921,4929,54609 7,5609,54609,4543, 4975,5432,5187 ,4973,4627,4049,4779,426565,55 05, 5549, 5404, 5434, 5419, 4670,456730,541361, 451105,4670,5505, 5549, 5404, UK Nomall NO BINS(Serial) with DOB is :10$ UK with BINS(Serial) with DOB is :15$ UK Nomall no BINS(Serial) no DOB is: 6$ UK with BINS(Serial) is :12$ Please do not request : cc for TEST and FREE. DON'T CONTACT ME IF YOU NOT READY NEED TO BUY .

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  • Week in Geek: Microsoft has Bought Underlying Patents for Netscape Browser

    - by Asian Angel
    Our latest edition of WIG is filled with news link goodness covering topics such as ChromeOS has received a new desktop-style look, a roundup of tools to remove Flashback malware on Macs, Kubuntu has a new official sponsor, and more. Wedding clipart courtesy of CartoonClipArtWorld. How to Stress Test the Hard Drives in Your PC or Server How To Customize Your Android Lock Screen with WidgetLocker The Best Free Portable Apps for Your Flash Drive Toolkit

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  • DRBD and MySQL - Virtualbox Setup

    DRBD is a Linux project that provides a real-time distributed filesystem. Sean Hull demonstrates how to use Sun's virtualbox software to create a pair of VMs, then configure those VMs with DRBD, and finally install and test MySQL running on volumes sitting on DRBD.

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  • DRBD and MySQL - Virtualbox Setup

    DRBD is a Linux project that provides a real-time distributed filesystem. Sean Hull demonstrates how to use Sun's virtualbox software to create a pair of VMs, then configure those VMs with DRBD, and finally install and test MySQL running on volumes sitting on DRBD.

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  • What changes were made to a document

    - by Daniel Moth
    Part of my job is writing functional specs. Due to the inevitable iterative and incremental nature of software design/development, these specs need to be updated with additions/deletions/changes over a period of time. When the time comes for a developer to implement features or update their design document (or a tester to test the feature or update their test specs) they need to be doing that against the latest spec. The problem is that if they have reviewed this document already, they need a quick way to find the delta from the last time they reviewed it to see what changes exist and how their existing plans may be affected (instead of having to read the entire document again). Doing that is very easy assuming your Word documents are hosted on SharePoint. 1. Every time you review a document note the SharePoint version and/or date (if it is a printed copy, make sure your printout includes the date in the footer – all my specs do) 2. When you need to see what changed, open the document (make sure you are not using a cached or local offline copy) and on the ribbon go to the "Review" tab and then  click on the "Compare" button. 3. Click on the "Specific Version…" option. In the dialog that pops up pick the last version you reviewed and click the "Compare" button. [TIP for authors: before checkin of your document, always compare against the "Last Version" on the SharePoint so you can add appropriate more complete check in comments] 4. What you see now is that in addition to the document you have open, two other documents just opened up. One is in the background (flashing on your task bar) – close that one as it is the old version. 5. The other document is in the foreground and contains all the changes between the old version and the latest one. Be sure not to make edits to this document, use it only for reading the changes. To find all the changes, on the ribbon under the "Review" tab, click on the "Reviewing Pane" to open the reviewing pane on the left. You can now click on each pink change to see what it is. 6. When you are done reviewing changes close the document and don't save any changes (remember if you want to make edits/additions/comments make them in the original document which is still open). And now I have a URL to point to people that keep asking about this – enjoy  :-) Comments about this post welcome at the original blog.

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  • How to choose an agile methodology?

    - by Christophe Debove
    I'm working in a little firm about 10 developpers, we are working a kind of agile way but knowledgeless and without formalism. I think be aware of what are agile method, what can they afford to us, may render more productive our products. However there is a lot of agile method, which could be the simplest to "learn"? Rapid Application Development Dynamic systems development method Scrum Feature Driven Development Extreme programming Adaptive software development Test Driven Development Crystal clear

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  • Commit Review Questions

    - by Wes McClure
    Note: in this article when I refer to a commit, I mean the commit you plan to share with the rest of the team, if you have local commits that you plan to amend/combine, I am referring to the final result. In time you will find these easier to do as you develop, however, all of these are valuable before checking in!  The pre commit review is a nice time to polish what might have been several hours of intense work, during which these things were the last things on your mind!  If you are concerned about losing your work in the process of responding to these questions, first do a check-in and amend it as you go (assuming you are using a tool such as git that supports this), rolling the result into one nice commit for everyone else.  Did you review your commit, change by change, with a diff utility? If not, this is a list of reasons why you might want to start! Did you test your changes? If the test is valuable to be automated, is it? If it’s a manual testing scenario, did you at least try the basics manually? Are the additions/changes formatted consistently with the rest of the project? Lots of automated tools can help here, don’t try to manually format the code, that’s a waste of time and as a human you will fail repeatedly. Are these consistent: tabs versus spaces, indentation, spacing, braces, line breaks, etc Resharper is a great example of a tool that can automate this for you (.net) Are naming conventions respected? Did you accidently use abbreviations, unless you have a good reason to use them? Does capitalization match the conventions in the project/language? Are files partitioned? Sometimes we add new code in existing files in a pinch, it’s a good idea to split these out if they don’t belong ie: are new classes defined in new files, if this is something your project values? Is there commented out code? If you are removing an existing feature, get rid of it, that is why we have VCS If it’s not done yet, then why are you checking it in? Perhaps a stash commit (git)? Did you leave debug or unnecessary changes? Do you understand all of the changes? http://geekswithblogs.net/wesm/archive/2012/04/11/programming-doesnrsquot-have-to-be-magic.aspx Are there spelling mistakes? Including your commit message! Is your commit message concise? Is there follow up work? Are there tasks you didn’t write down that you need to follow up with? Are readability or reorganization changes needed? This might be amended into the final commit, or it might be future work that needs added to the backlog. Are there other things your team values that you should review?

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  • SQL SERVER – Use ROLL UP Clause instead of COMPUTE BY

    - by pinaldave
    Note: This upgrade was test performed on development server with using bits of SQL Server 2012 RC0 (which was available at in public) when this test was performed. However, SQL Server RTM (GA on April 1) is expected to behave similarly. I recently observed an upgrade from SQL Server 2005 to SQL Server 2012 with compatibility keeping at SQL Server 2012 (110). After upgrading the system and testing the various modules of the application, we quickly observed that few of the reports were not working. They were throwing error. When looked at carefully I noticed that it was using COMPUTE BY clause, which is deprecated in SQL Server 2012. COMPUTE BY clause is replaced by ROLL UP clause in SQL Server 2012. However there is no direct replacement of the code, user have to re-write quite a few things when using ROLL UP instead of COMPUTE BY. The primary reason is that how each of them returns results. In original code COMPUTE BY was resulting lots of result set but ROLL UP. Here is the example of the similar code of ROLL UP and COMPUTE BY. I personally find the ROLL UP much easier than COMPUTE BY as it returns all the results in single resultset unlike the other one. Here is the quick code which I wrote to demonstrate the said behavior. CREATE TABLE tblPopulation ( Country VARCHAR(100), [State] VARCHAR(100), City VARCHAR(100), [Population (in Millions)] INT ) GO INSERT INTO tblPopulation VALUES('India', 'Delhi','East Delhi',9 ) INSERT INTO tblPopulation VALUES('India', 'Delhi','South Delhi',8 ) INSERT INTO tblPopulation VALUES('India', 'Delhi','North Delhi',5.5) INSERT INTO tblPopulation VALUES('India', 'Delhi','West Delhi',7.5) INSERT INTO tblPopulation VALUES('India', 'Karnataka','Bangalore',9.5) INSERT INTO tblPopulation VALUES('India', 'Karnataka','Belur',2.5) INSERT INTO tblPopulation VALUES('India', 'Karnataka','Manipal',1.5) INSERT INTO tblPopulation VALUES('India', 'Maharastra','Mumbai',30) INSERT INTO tblPopulation VALUES('India', 'Maharastra','Pune',20) INSERT INTO tblPopulation VALUES('India', 'Maharastra','Nagpur',11 ) INSERT INTO tblPopulation VALUES('India', 'Maharastra','Nashik',6.5) GO SELECT Country,[State],City, SUM ([Population (in Millions)]) AS [Population (in Millions)] FROM tblPopulation GROUP BY Country,[State],City WITH ROLLUP GO SELECT Country,[State],City, [Population (in Millions)] FROM tblPopulation ORDER BY Country,[State],City COMPUTE SUM([Population (in Millions)]) BY Country,[State]--,City GO After writing this blog post I continuously feel that there should be some better way to do the same task. Is there any easier way to replace COMPUTE BY? Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Webcast : Les nouveautés de Microsoft visual studio 2010, mardi 22 juin

    Les nouveautés de Microsoft visual studio 2010 Venez découvrir les nouveautés de visual studio 2010 le mardi 22 juin 2010, de 11h00 à 12h00 à travers une présentation web. Microsoft vous fera découvrir les évolutions de la nouvelle version Microsoft Visual Studio 2010 grâca à un expert qui sera mis à votre dispostion. Vous aurez la possibilité de vous familiariser avec les fonctionnalités de Test : IntelliTrace, Lab Management? Microsoft visual studio 2010 vous invite aussi à découvrir le Team Foundation Server et la collaboration de vos équipes de développement, y compris le développement Parallèle, Cloud, Sharepoint

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  • Game Center: Leaderboard score inconsistencies

    - by Hasyimi Bahrudin
    Background I'm currently developing a simple library that mirrors Game Center's functionalities locally. Basically, this library is a system that manages achievements and leaderboards, and optionally sync it with the Game Center. So, if the game is not GC enabled, the game will still have achievements and leaderboards (stored inside a plist). But of course, the leaderboards will then only contain the local player's scores (which is kind of useless, I know :P). Problem Currently I have coded both of the achievements and leaderboards subsystems. The achievements subsystem have already been tested and it works. I'm currently testing the leaderboards subsystem using multiple test user accounts. I loaded the test app on a device and on the simulator, both logged in with 2 different user accounts. Then I performed these steps: I first used the device to upload a score. Then, I ran the simulator, and the score submitted by the user on the device is shown. Which is cool. Then, I used the simulator to upload a score. But on the device, still, only one score is listed. I checked on the Game Center app (to see if the bug lies within my code), and I got the same thing. Under "All players", there is only one score on the device, but there are 2 scores on the simulator. I wanted to make sure that the simulator is not causing this, so I swapped the users on the device and the simulator, and the result is still the same. In other words, the first user is oblivious of the second user's score, but the second user can see the first user's score. Then I tried with a third user. The result: the third user can only see the scores of the first user and himself. The second user still sees the scores of the first user and himself. The first user only sees his own score. Now here comes the weird part. I then make the first user and the second user befriend each other. The result: under "Friends", the first user can see the second user's score, but under "All Players", the first user's score is the only one listed. Screenshots The first user sees this: The second user sees this: So, is this a normal thing when using sandboxed GC accounts? Is this behavior documented somewhere by Apple?

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  • Can I use VirtualBox as a sandbox for 12.04?

    - by Stephen Myall
    I am quite a cautious person though not afraid to experiment. I currently have 11.10 Unity and 12.04 Beta 2 running on different partitions (no problems). I have learned here that Unity can run in VirtuaBox. When I upgrade to 12.04 LTS later this month, I am curious to understand if I could also run 12.04 in Virtual Box for experimentation and test some things before I implement them into my system? Maybe there is a better way to achieve this, without partitioning my hard drive.

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  • how to install a pbc library with fink installation,what is meant by fink installation

    - by user2910238
    jec@jec:~/cpabe/libpbc$ ./configure bash: ./configure: No such file or directory jec@jec:~/cpabe/libpbc$ ls announce COPYING gen include misc release arith debian gmp-5.1.3 INSTALL NEWS setup AUTHORS doc gmp-5.1.3.tar.bz2.sig licence.odt param simple.make benchmark ecc gpl-3.0.odt makedeb.sh pbc test configure.ac example guru Makefile.am README jec@jec:~/cpabe/libpbc$ ./configure.ac bash: ./configure.ac: Permission denied

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  • 3D Ball Physics Theory: collision response on ground and against walls?

    - by David
    I'm really struggling to get a strong grasp on how I should be handling collision response in a game engine I'm building around a 3D ball physics concept. Think Monkey Ball as an example of the type of gameplay. I am currently using sphere-to-sphere broad phase, then AABB to OBB testing (the final test I am using right now is one that checks if one of the 8 OBB points crosses the planes of the object it is testing against). This seems to work pretty well, and I am getting back: Plane that object is colliding against (with a point on the plane, the plane's normal, and the exact point of intersection. I've tried what feels like dozens of different high-level strategies for handling these collisions, without any real success. I think my biggest problem is understanding how to handle collisions against walls in the x-y axes (left/right, front/back), which I want to have elasticity, and the ground (z-axis) where I want an elastic reaction if the ball drops down, but then for it to eventually normalize and be kept "on the ground" (not go into the ground, but also not continue bouncing). Without kluging something together, I'm positive there is a good way to handle this, my theories just aren't getting me all the way there. For physics modeling and movement, I am trying to use a Euler based setup with each object maintaining a position (and destination position prior to collision detection), a velocity (which is added onto the position to determine the destination position), and an acceleration (which I use to store any player input being put on the ball, as well as gravity in the z coord). Starting from when I detect a collision, what is a good way to approach the response to get the expected behavior in all cases? Thanks in advance to anyone taking the time to assist... I am grateful for any pointers, and happy to post any additional info or code if it is useful. UPDATE Based on Steve H's and eBusiness' responses below, I have adapted my collision response to what makes a lot more sense now. It was close to right before, but I didn't have all the right pieces together at the right time! I have one problem left to solve, and that is what is causing the floor collision to hit every frame. Here's the collision response code I have now for the ball, then I'll describe the last bit I'm still struggling to understand. // if we are moving in the direction of the plane (against the normal)... if (m_velocity.dot(intersection.plane.normal) <= 0.0f) { float dampeningForce = 1.8f; // eventually create this value based on mass and acceleration // Calculate the projection velocity PVRTVec3 actingVelocity = m_velocity.project(intersection.plane.normal); m_velocity -= actingVelocity * dampeningForce; } // Clamp z-velocity to zero if we are within a certain threshold // -- NOTE: this was an experimental idea I had to solve the "jitter" bug I'll describe below float diff = 0.2f - abs(m_velocity.z); if (diff > 0.0f && diff <= 0.2f) { m_velocity.z = 0.0f; } // Take this object to its new destination position based on... // -- our pre-collision position + vector to the collision point + our new velocity after collision * time // -- remaining after the collision to finish the movement m_destPosition = m_position + intersection.diff + (m_velocity * intersection.tRemaining * GAMESTATE->dt); The above snippet is run after a collision is detected on the ball (collider) with a collidee (floor in this case). With a dampening force of 1.8f, the ball's reflected "upward" velocity will eventually be overcome by gravity, so the ball will essentially be stuck on the floor. THIS is the problem I have now... the collision code is running every frame (since the ball's z-velocity is constantly pushing it a collision with the floor below it). The ball is not technically stuck, I can move it around still, but the movement is really goofy because the velocity and position keep getting affected adversely by the above snippet. I was experimenting with an idea to clamp the z-velocity to zero if it was "close to zero", but this didn't do what I think... probably because the very next frame the ball gets a new gravity acceleration applied to its velocity regardless (which I think is good, right?). Collisions with walls are as they used to be and work very well. It's just this last bit of "stickiness" to deal with. The camera is constantly jittering up and down by extremely small fractions too when the ball is "at rest". I'll keep playing with it... I like puzzles like this, especially when I think I'm close. Any final ideas on what I could be doing wrong here? UPDATE 2 Good news - I discovered I should be subtracting the intersection.diff from the m_position (position prior to collision). The intersection.diff is my calculation of the difference in the vector of position to destPosition from the intersection point to the position. In this case, adding it was causing my ball to always go "up" just a little bit, causing the jitter. By subtracting it, and moving that clamper for the velocity.z when close to zero to being above the dot product (and changing the test from <= 0 to < 0), I now have the following: // Clamp z-velocity to zero if we are within a certain threshold float diff = 0.2f - abs(m_velocity.z); if (diff > 0.0f && diff <= 0.2f) { m_velocity.z = 0.0f; } // if we are moving in the direction of the plane (against the normal)... float dotprod = m_velocity.dot(intersection.plane.normal); if (dotprod < 0.0f) { float dampeningForce = 1.8f; // eventually create this value based on mass and acceleration? // Calculate the projection velocity PVRTVec3 actingVelocity = m_velocity.project(intersection.plane.normal); m_velocity -= actingVelocity * dampeningForce; } // Take this object to its new destination position based on... // -- our pre-collision position + vector to the collision point + our new velocity after collision * time // -- remaining after the collision to finish the movement m_destPosition = m_position - intersection.diff + (m_velocity * intersection.tRemaining * GAMESTATE->dt); UpdateWorldMatrix(m_destWorldMatrix, m_destOBB, m_destPosition, false); This is MUCH better. No jitter, and the ball now "rests" at the floor, while still bouncing off the floor and walls. The ONLY thing left is that the ball is now virtually "stuck". He can move but at a much slower rate, likely because the else of my dot product test is only letting the ball move at a rate multiplied against the tRemaining... I think this is a better solution than I had previously, but still somehow not the right idea. BTW, I'm trying to journal my progress through this problem for anyone else with a similar situation - hopefully it will serve as some help, as many similar posts have for me over the years.

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  • links for 2010-06-11

    - by Bob Rhubart
    The Web-Service May Not be the Bottleneck! | Shopzilla Tech Blog The web-service doesn't perform We have a performance problem we're investigating Sound familiar? Is the web-service under test really the performance (tags: ping.fm cloud soa oracle coherence virtualization)

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  • ray collision with rectangle and floating point accuracy

    - by phq
    I'm trying to solve a problem with a ray bouncing on a box. Actually it is a sphere but for simplicity the box dimensions are expanded by the sphere radius when doing the collision test making the sphere a single ray. It is done by projecting the ray onto all faces of the box and pick the one that is closest. However because I'm using floating point variables I fear that the projected point onto the surface might be interpreted as being below in the next iteration, also I will later allow the sphere to move which might make that scenario more likely. Also the bounce coefficient might be as low as zero, making the sphere continue along the surface. So my naive solution is to project not only forwards but backwards to catch those cases. That is where I got into problems shown in the figure: In the first iteration the first black arrow is calculated and we end up at a point on the surface of the box. In the second iteration the "back projection" hits the other surface making the second black arrow bounce on the wrong surface. If there are several boxes close to each other this has further consequences making the sphere fall through them all. So my main question is how to handle possible floating point accuracy when placing the sphere on the box surface so it does not fall through. In writing this question I got the idea to have a threshold to only accept back projections a certain amount much smaller than the box but larger than the possible accuracy limitation, this would only cause the "false" back projection when the sphere hit the box on an edge which would appear naturally. To clarify my original approach, the arrows shown in the image is not only the path the sphere travels but is also representing a single time step in the simulation. In reality the time step is much smaller about 0.05 of the box size. The path traveled is projected onto possible sides to avoid traveling past a thinner object at higher speeds. In normal situations the floating point accuracy is not an issue but there are two situations where I have the concern. When the new position at the end of the time step is located very close to the surface, very unlikely though. When using a bounce factor of 0, here it happens every time the sphere hit a box. To add some loss of accuracy, the motivation for my concern, is that the sphere and box are in different coordinate systems and thus the sphere location is transformed for every test. This last one is why I'm not willing to stand on luck that one floating point value lying on top of the box always will be interpreted the same. I did not know voronoi regions by name, but looking at it I'm not sure how it would be used in a projection scenario that I'm using here.

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