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  • How to make my sprite jump properly?

    - by Matthew Morgan
    I'm currently working on a 2D platformer in XNA. I have, however been having some trouble with creating a fully functional jumping algorithm. This is what I have so far: if (keystate.IsKeyDown(Keys.W)) if (onGround = true) //"onground" is true when the collision between the main sprite and the ground is detected { spritePosition.Y = velocity.Y = -5; } So, the problem I am now having is that as soon as the jump starts the variable "onGround" = false and the sprite is brought back the ground by the simple gravity I have implemented. The other problem I have is creating a limit to the height after which the sprite should automatically return to the ground. Any advice or suggestions would be greatly appreciated.

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  • Ubuntu 12.04 Freezes after removing the HDMI cable or changing settings

    - by euDennis
    I'm using an fresh install of Ubuntu 12.04 and I'm having some problems with HDMI. I usually use it with my TV, but since the update isn't working any more. Sometimes in 11.10 I had to execute a script to get the video and sound to work in HDMI, but it was OK. Since the update, when I connect the HDMI cable, it works, but if I make any change in the display settings (like resolution, monitor position, etc,) it freezes. And if I don't change anything, it's working in both monitors, but when I remove the cable, it freezes and even the ctrl+alt+f2 shortcut works. Any ideas for fixing this? I Googled and only found many people having problems, usually with sound.

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  • I installed Ubuntu alongside Windows but I can't see it in Windows' boot menu

    - by André Hallé
    I have a second machine where Ubuntu 12.04 LTS and Debian Squeeze are installed on the same HD and when I boot, I have this grub menu where I can choose which partition I will used. It works perfectly! But in my Windows environment that's another story. Now after making almost everything that I know, to make it work along Windows 7, there is no entry in the boot menu of Windows (I know, Ubuntu use grub but anyway there is surely a way to fix it, access it?). Why there is no Ubuntu entry? Why the installation gave me no error while I have this strange situation of having a "ghost OS" called Ubuntu installed somewhere in my second HD in a partition made especially for it and not being able to access it, starting it, having it working? Am I wrong? If I am, what's the problem? If I'm not, what's the need of Wubi?

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  • Swapping axis labels between 2D and 3D coordinates

    - by Will
    My game world is 3D. The map is only 2D, however. It is natural to think of the map as having an X and Y axis. And it is natural to think of the world has having an X, Y and Z axis, where Y is upwards. That is to say, X Y in 2D map coordinates is X Z in 3D coordinates. What conventions and approaches do you have to keeping things straight at a code level to make mapping between them natural? (Is Y usually upwards in 3D? Or do you have X and Z in map coordinates, or?)

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  • Trouble updating metapackage

    - by jake
    I'm having trouble downloading xfce4 metapackage. I don't have a desktop yet just cmd line and this is my first time on linux. sudo apt-get install xfce4 brings back Unable to locate package xfce4 Does that with all packages, leads me to sudo apt-get update Leaves me with temporary failure resolving 'downloads-distro.mongodb.org' Read some solutions to fix this but it had me going in circles with no avail. Need to get this working from cmd prompt. So I'm having trouble updating and am lost here without a desktop client. If anyone can help that would be great.

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  • Intel GMA 4500M screen resolution problem

    - by I Heart Ubuntu
    I was previously running 10.10 on my Acer Aspire laptop. It has Intel GMA 4500M integrated graphics and worked just fine. Great display, sharp, crisp, etc. I decided to do a fresh install of 11.10 Oneiric and now am having problems. Originally I was getting the dreaded blank screen where the brightness was turned almost completely off. Some searching pulled up several easy fixes (editing GRUB). Right now I am still having one issue. The screen resolution is stuck at a max of 1024x768 giving me a distorted screen. Is there any way to fix this issue? I've Googled, searched Ask Ubuntu and also spent time on the forums looking for a solution. Thus far, nothing. Apparently, was and still is a concern in Natty? Any help would be greatly appreciated.

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  • Final steps in installing Matlab2012 on Ubuntu 12.04

    - by Mattia
    I have a problem with the MATLAB 2012 installation. After having installed it using alt+f2 and having used gksudo nautilus I have installed MATLAB in the correct folder which is: /usr/local/MATLAB/R2012a Then I inserted the license and the window told "activation complete" or something like that. This made me happy, but only for a while because as soon as I try to search for Matlab within the applications I cannot find it and neither if I try to run matlab into terminal it says: command not found Can someone help me!? Tanks in advance!

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  • Ubuntu version on external hardrive that shows up in GRUB?

    - by RPi Awesomeness
    I was wondering, is it possible to have Ubuntu installed on an external harddrive and still have it show up in GRUB? Of course, you wouldn't be able boot the other HDD OS unless it was connected, but would this work? I googled 'external HDD OS show in GRUB' and 'have external HDD show up in GRUB' but they didn't bring up anything. Does anyone have any resources to point me to? I can see this as being useful for testing out new releases or having multiple OSs installed without having to go through the BIOS boot choice. Thanks!

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  • Wifi stops working in 13.10

    - by Vitor
    OK, my wifi is connecting fine, but it just stop downloading and uploading data. The skype stops, trying to reconnect, the firefox nighly and the google chromium stops loading pages and websites, everythings stops. But when I see the network icon: connected to my wifi. Then, I simply reconnect, or disconnect and connect again. Reconnecting, the wifi starts working again, the skype icon turns green, the browsers work again. Previously, I had 13.04 and never had this problem. When I upgraded to Ubuntu 13.10, the wifi started to do this. And the wifi has this problem since the early times of 13.10; since I installed 13.10, the wifi is having this issue (from the first day I installed it). Anyone having the same problem? Anyone knows how to fix it?

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  • Will not supporting IE or older browsers drive away potential visitors/users of my site? [closed]

    - by XToro
    Normally a SO browser but this question doesn't fit there, hopefully it fits here. I just want to ask from web designers' point of view if it's wrong to not care about supporting Internet Explorer or older browsers. The site I'm designing looks great in all browsers except IE9-. There are certain things that IE doesn't support or behave like other browsers; webkit stuff, some CSS styles, drop-and-drop files from OS etc etc, but it all works great in Safari, FireFox, Chrome etc. Should I be that concerned? I know there are several people that use IE, but it's limitations have just been causing me more work by having to come up with workarounds. From what I've read, many of the issues I've been having should be solved with IE10, but not everybody keeps up to date. I know of several people who are still using IE6! Again, I'm hoping this is the right place to ask a question like this, and if not, please point me to the right stack exchange site instead of just downvoting me. Thanks! EDIT: Upon further research.... So far this year, IE(all versions) and Chrome have been neck and neck as the top, with IE only squeaking by Chrome, and FireFox a close 3rd. But looking at the top 10 browsers, IE6 doesn't even show up on this list in which the lowest percentage is 1.92%. Source : http://www.w3counter.com/globalstats.php?year=2012&month=7 Having a look at this other site, IE6 shows up in 11th place out of 12, just before "Other" http://www.sitepoint.com/browser-trends-february-2012/ This makes me a little more wary of not spending more time on IE compatibility. However, my site will not be going to a live beta until October or November, and I'm hoping that IE10 will have more features coded into it. Currently, I've written my upload page which is a "drag-and-drop files from the OS" type to simply display "IE is not supported", leaving no other option for IE users to upload pictures because I've spent so much time writing the uploader which does many things other than just upload the files. I will be changing this kinda cold "Access Denied" to a suggestion to upgrade, or install other browsers, with download links for each. Big thanks for the posts here and the interesting links!

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  • How do I add restrictions for users to sign up before they can access web site?

    - by user1867842
    How do I get my webpage not to go back when they hit the back button and are logged out and how can I add a web page to be blocked like FACEBOOK doesn't let you get into their site with out having a page or a account with them, and if you try to put something in the url and try to go to something on their site it gives you a web page that says "you have to be logged in first" . Like I don't want someone going to the url of the "index" page before they have signed up as a member they need to make an account first then they can have access to the "index" page. How do I do this. I have a website so far that has a database and the website has 5 pages so far and two of them which is the login and sign up page which are both used with php and mysql and they work fine. How do I restrict access to the main website by first having the users sign up with me for an account.

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  • Best Practice to return responses from service

    - by A9S6
    I am writing a SOAP based ASP.NET Web Service having a number of methods to deal with Client objects. e.g: int AddClient(Client c) = returns Client ID when successful List GetClients() Client GetClientInfo(int clientId) In the above methods, the return value/object for each method corresponds to the "all good" scenario i.e. A client Id will be returned if AddClient was successful or a List< of Client objects will be returned by GetClients. But what if an error occurs, how do I convey the error message to the caller? I was thinking of having a Response class: Response { StatusCode, StatusMessage, Details } where Details will hold the actual response but in that case the caller will have to cast the response every time. What are your views on the above? Is there a better solution? ---------- UPDATED ----------- Is there something new in WCF for the above? What difference will it make If I change the ASP.NET Web Service to a WCF Service?

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  • Lubuntu 13.10 - Laptop Loses wireless after sleep

    - by user206217
    I'm running Lubunu 13.10 on an hp G62 - I'm new to Lubuntu having used ubuntu previously, but I've made the switch as my laptop is now getting toward the lower end of acceptability, and I'm delighted with how well it runs. Anyway, I'm having an issue that if I close the lid of the laptop it won't reconnect to the wi-fi when I open it again, and I'm not sure how to even force it to scan for a network - I have to restart it at the moment - and then it always connects perfectly. The router is a BT Business Hub 405. Any help much appreciated - thank you.

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  • Just wondering about "Do-It Yourself Apps" on the internet versus apps written by us developers

    - by user657514
    Hi, I have been doing Objective-C programming over the past few weeks, and I have learnt a lot. However, I see that there are other Web-companies offering services to consumers directly from their website that allow consumers to create their apps through a point and click and drag features without any code. Clearly they are more cost effective and fast than having a developer write an app. I was wondering if there are any advantages then of having a developer build an app for someone, other than the obvious advantage that its got a custom look and feel. Could someone please clarify, since Im new and would like to evaluate whether it is worthwhile spending time towards learning a whole new development environment when someone could just use a webservice to make an app for multiple platforms Thanks

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  • Using Git in Enterprise environment

    - by sarat
    Git is an excellent version control. If we exclude the fact that, it doesn't have an excellent GUI support, it's really good and fast. But the source controls like Clearcase has large support for enterprise customers. Companies investing huge amount for source control servers and licesense. Of late most of the large companies like Google adopting Git over the other version controls. But the company is having strong open source group which consistently provide development and support for the tool (Even they might be having a custom version of Git of their own). At the same time, large companies are not really bothered about adopting open source projects and make it relevant for them. Is Git really a reliable tool for enterprise environment, especially for Windows Platform? The support is a question for Git as it's an open source version control. Any companies are there to provide solutions and support? How the server costs comparing to other version controls like Clear-case?

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  • To track or not to track user created images for display in a dynamic website?

    - by Question Overflow
    I have a website that allows user to upload and display images. Currently, I am not using a database to track these user images. A folder having the user id as the folder name is created for each user and under each folder, the image files are labelled numerically with filenames ranging from 01.jpg to 20.jpg. Up to 20 such images can be displayed on each user page. I am using javascript to hide these images in case of any of them is absent. I have seen many websites having user images with unique random filenames and possibly tracking these files with a database Since obscurity is not something that I need for these web accessible images, is there any reason why I should track them with a DB? I am not sure if a reduction of 404 errors is a good enough reason to justify the added complexity of maintaining a database or can anyone enlighten me?

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  • What is the best strategy for licensing a desktop application using a web service, when all I need to know is when people use the product?

    - by user1667022
    Our company's main application is a desktop program that is used at warehouses and written in C# and Windows Presentation Forms. The next thing we want to be able to do is track when customers open up the application and when it is being used. The reason for this is so we can charge them per month, based on if they are/arn't using the application. My boss is having me research different ways to "license" the product under these requirements. Not having any experience doing this, a few things come to mind. I could create a web application that runs on a server, and every time the desktop application is opened and the user logs in, the application connects to the server and marks a database with the DateTime. Or is there licensing software that I can use to accomplish this? Just looking for tips/advice from people who have experience with this type of stuff.

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  • Should an image be able to resize itself in OOP?

    - by ChocoDeveloper
    I'm writing an app that will have an Image entity, and I'm already having trouble deciding whose responsibility each task should be. First I have the Image class. It has a path, width, and other attributes. Then I created an ImageRepository class, for retrieving images with a single and tested method, eg: findAllImagesWithoutThumbnail(). But now I also need to be able to createThumbnail(). Who should deal with that? I was thinking about having an ImageManager class, which would be an app-specific class (there would also be a third party image manipulation reusable component of choice, I'm not reinventing the wheel). Or maybe it would be 0K to let the Image resize itself? Or let the ImageRepository and ImageManager be the same class? What do you think?

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  • Cannot access my own web page

    - by enflam3
    I am developing, learning and experimenting with php,html,javascript,flash and so on. Having web hosting and all of the cpanel, phpmyadmin and other utilities. One day, while updating information, connection between my computer and website just went down. I found out that it is only from this computer, where I cannot access anything. I don't know what is the reason I cannot access website, however this is what I have checked so far: Everything else opens normally, having problem only with my page. Cannot access FTP,cpanel or any kind of information related to the domain and hosting ipconfigs detects IP, but shows request timed out (so its not browser related) Turned off Firewall,AV, Rebooted computer Cleared caches,temp,cookies,histry with CCleaner Checked connectivity with both (wired,wireless) networks ISP has dynamic IP that has been changed about 3 times since issue Checked host file I am out of ideas and understanding what could cause this kind of issue, however couple minutes ago, found out that everything works with proxy server (when adding IP and port to the browsers) Can someone point out what should I check or try to get rid of this problem?

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  • Problem adding a ppa

    - by Roman Rdgz
    I want to install gcc compiler 4.7 to use c++11 features. I have looked on the internet for instructions, and I found in several websites these steps: sudo add-apt-repository ppa:Ubuntu-toolchain-r/test sudo apt-get update sudo apt-get install gcc-4.7 g++-4.7 The problem is that my console freezes when adding the ppa. At first I thought it was due to having an old Ubuntu version (11.04). So I have upgraded to 11.10 and then 12.04, and everything seems to work OK. But still having the same problem. Any help?

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  • ADF Real World Developers Guide Book Review

    - by Grant Ronald
    I'm half way through my review of "Oracle ADF Real World Developer's Guide" by Jobinesh Purushothaman - unfortunately some work deadlines de-railed me from having completed my review by now but here goes.  First thing, Jobinesh works in the Oracle Product Management team with me, so is a colleague. That declaration aside, its clear that this is someone who has done the "real world" side of ADF development and that comes out in the book. In this book he addresses both the newbies and the experience developers alike.  He introduces the ADF building blocks like entity objects and view obejcts, but also goes into some of the nitty gritty details as well.  There is a pro and con to this approach; having only just learned about an entity or view object, you might then be blown away by some of the lower details of coding or lifecycle.  In that respect, you might consider this a book which you could read 3 or 4 times; maybe skipping some elements in the first read but on the next read you have a better grounding to learn the more advanced topics. One of the key issues he addresses is breaking down what happens behind the scenes.  At first, this may not seem important since you trust the framework to do everything for you - but having an understanding of what goes on is essential as you move through development.  For example, page 58 he explains the full lifecycle of what happens when you execute a query.  I think this is a great feature of his book. You see this elsewhere, for example he explains the full lifecycle of what goes on when a page is accessed : which files are involved,the JSF lifecycle etc. He also sprinkes the book with some best practices and advice which go beyond the standard features of ADF and really hits the mark in terms of "real world" advice. So in summary, this is a great ADF book, well written and covering a mass of information.  If you are brand new to ADF its still valid given it does start with the basics.  But you might want to read the book 2 or 3 times, skipping the advanced stuff on the first read.  For those who have some basics already then its going to be an awesome way to cement your knowledge and take it to the next levels.  And for the ADF experts, you are still going to pick up some great ADF nuggets.  Advice: every ADF developer should have one!

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  • How to render a texture partly transparent?

    - by megamoustache
    Good Morning StackOverflow, I'm having a bit of a problem right now as I can't seem to find a way to render part of a texture transparently with openGL. Here is my setting : I have a quad, representing a wall, covered with this texture (converted to PNG for uploading purposes). Obviously, I want the wall to be opaque, except for the panes of glass. There is another plane behind the wall which is supposed to show a landscape. I want to see the landscape from behind the window. Each texture is a TGA with alpha channel. The "landscape" is rendered first, then the wall. I thought it would be sufficient to achieve this effect but apparently it's not the case. The part of the window supposed to be transparent is black and the landscape only appears when I move past the wall. I tried to fiddle with GLBlendFunc() after having enabled it but it doesn't seem to do the trick. Am i forgetting an important step ? Thank you :)

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  • Developing a search algorithm

    - by Richart Bremer
    I want to create a basic search engine, and I want you to give me some ideas how to filter out the best results for my visitors. I have three fields regarding a product the user can search in: Title Category Description I came up with these ideas and I ask you to either competently criticize them or add to them. If the search term occurs in all three fields it should be among the first results. If it is in two of the fields it is below the results of 1. Combine the amount of occurences and output a value in per cent. For instance if in all fields together the term clock appeared 50 times and in all fields together there are 200 words, then the per cent value is 50/200*100 = 25%. Another product entry amounts to say 20% so product one having 25% is listed before product two having 20%.

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  • mouse pad freezes

    - by abrewmeister
    I have an acer aspire running net book remix 11.10. the mouse pad freezes up completely and I must use an external mouse. if I reboot the computer the mouse pad will work again. i seem to have this problem happen in the middle of either using firefox or a few time while using thunderbird. anyone else having this problem. an external mouse works but scrolling is choppy or it scrolls part of the way down a page and then jumps to the top again. I don't recall having this problem after upgrading to 11.10 so I think it is related to an update. my Linux skills are limited.

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