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  • SpriteBatch.end() generating null pointer exception

    - by odaymichael
    I am getting a null pointer exception using libGDX that the debugger points as the SpriteBatch.end() line. I was wondering what would cause this. Here is the offending code block, specifically the batch.end() line: batch.begin(); for (int j = 0; j < 3; j++) for (int i = 0; i < 3; i++) if (zoomgrid[i][j].getPiece().getImage() != null) zoomgrid[i][j].getPiece().getImage().draw(batch); batch.end(); The top of the stack is actually a line that calls lastTexture.bind(); In the flush() method of com.badlogic.gdx.graphics.g2d.SpriteBatch. I appreciate any input, let me know if I haven't included enough information.

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  • deciphering columnar transposition cipher

    - by Arfan M
    I am looking for an idea on how to decipher a columnar transposition cipher without knowing the key or the length of the key. When I take the cipher text as input to my algorithm I will guess the length of the key to be the factors of the length of the cipher text. I will take the first factor suppose the length was 20 letters so I will take 2*10 (2 rows and 10 columns). Now I want to arrange the cipher text in the columns and read it row wise to see if there is any word forming and match it with a dictionary if it is something sensible. If it matches the dictionary then it means it is in correct order or else I want to know how to make other combinations of the columns and read the string again row wise. Please suggest another approach that is more efficient.

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  • lubuntu - Sound card detected but no sound

    - by CookieMonster
    I installed Lubuntu 12.10 on my old laptop (Sharp Mebius PC-MR80J), but sound does not work. Here are things I tried. aplay -l does not output anything. When I run alsamixer, I see only one bar that says "Beep". I installed pavucontrol, pulseaudio, pulseaudio-utils and libgtk-3-0 and checked output devices, but I only see "Dummy ouput" and there is no hardware output devices. cat /proc/asound/cards returns the following. 0 [Intel ]: HDA-Intel - HDA Intel HDA Intel at 0xfeb38000 irq 40 cat /proc/asound/devices outputs the following. 1: : sequencer 2: [ 0- 1]: hardware dependent 3: [ 0- 0]: hardware dependent 4: [ 0] : control 33: : timer The laptop was running Windows XP before and sound (both input and outpu) was working. What can I do now?

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  • Tutorial (or livedisk) for multiseat setup with dual-head display supporting openGL direct rendering?

    - by Tobias Kienzler
    I'm currently running Ubuntu 10.10 (64 bit), the GPU is an ATI Radeon HD 4290 onboard a ASUS M4A89GTD PRO/USB3 mainboard. The Ubuntu wiki doesn't cover 10.10 yet and I also don't know if that method would support direct rendering. I heard mentions of xephyr and xgl, what are the differences? Where should I start? I tried the mdm livedisk but that doesn't boot. I'm also willing to try a different distribution if necessary. Edit: 1 Will the HowTo: A well performing, full eye-candy, accelerated pseudo-multiseat setup on a single dualhead GPU. for Ubuntu 9.04 still work? I'm afraid it omits how to setup two input devices and sound however... Edit: 2 http://multiseatonlinux.blogspot.com/2010/06/part-1-setting-up-base.html covers 10.10 but requires pinning gdm. Is that circumvenatable? Also how does that setup have to be modified for dual-head?

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  • Silverlight Security

    Here are some interesting links about Silverlight security (I learnt a lot from the first document): Silverlight security whitepaper: > http://download.microsoft.com/download/A/1/A/A1A80A28-907C-4C6A-8036-782E3792A408/Silverlight Security Overview.docx This reading gives you a lot of insight into features like Isolated Storage, Local Messaging, Cross-Site Scripting (XSS), Sandbox, Validate input, https, . Shawn Wildermuths session at MIX10: > Securing Microsoft Silverlight Applications ...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Wise settings for Git

    - by Marko Apfel
    These settings reflecting my Git-environment. It a result of reading and trying several ideas of input from others. Must-Haves Aliases [alias] ci = commit st = status co = checkout oneline = log --pretty=oneline br = branch la = log --pretty=\"format:%ad %h (%an): %s\" --date=short df = diff dc = diff --cached lg = log -p lol = log --graph --decorate --pretty=oneline --abbrev-commit lola = log --graph --decorate --pretty=oneline --abbrev-commit --all ls = ls-files ign = ls-files -o -i --exclude-standard Colors [color] ui = auto [color "branch"] current = yellow reverse local = yellow remote = green [color "diff"] meta = yellow bold frag = magenta bold old = red bold new = green bold whitespace = red reverse [color "status"] added = green changed = red untracked = cyan Core [core] autocrlf = true excludesfile = c:/Users/<user>/.gitignore editor = 'C:/Program Files (x86)/Notepad++/notepad++.exe' -multiInst -notabbar -nosession –noPlugin Nice to have Merge and Diff [merge] tool = kdiff3 [mergetool "kdiff3"] path = c:/Program Files (x86)/KDiff3/kdiff3.exe [mergetool "p4merge"] path = c:/Program Files (x86)/Perforce Merge/p4merge.exe cmd = p4merge \"$BASE\" \"$LOCAL\" \"$REMOTE\" \"$MERGED\" keepTemporaries = false trustExitCode = false keepBackup = false [diff] guitool = kdiff3 [difftool "kdiff3"] path = c:/Program Files (x86)/KDiff3/kdiff3.exe [difftool "p4merge"] path = C:/Users/<user>/My Applications/Perforce Merge/p4merge.exe cmd = \"p4merge.exe $LOCAL $REMOTE\" .

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  • When is an object oriented program truly object oriented?

    - by Syed Aslam
    Let me try to explain what I mean: Say, I present a list of objects and I need to get back a selected object by a user. The following are the classes I can think of right now: ListViewer Item App [Calling class] In case of a GUI application, usually click on a particular item is selection of the item and in case of a command line, some input, say an integer representing that item. Let us go with command line application here. A function lists all the items and waits for the choice of object, an integer. So here, I get the choice, is choice going to conceived as an object? And based on the choice, return back the object in the list. Does writing this program like the way explained above make it truly object oriented? If yes, how? If not, why? Or is the question itself wrong and I shouldn't be thinking along those lines?

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  • Mod_rewrite and urls that don't end with .php

    - by Kevin Laity
    I'm trying to use Mod_rewrite to hide the .php extensions of my pages. However, it refuses to do any rewriting unless the input url ends with .php, which makes that impossible. I can confirm that rewriting works fine as long as the url has .php at the end. RewriteRule a\.php b\.php Works, while RewriteRule a\.html b\.html does not. How can I turn off this behavior and allow it to rewrite all urls? I'm on a shared host so whatever I do has to be done from a .htaccess file. Update: There seems to be some confusion about what I'm asking here. The question is not about how to write the rule, the question is about server configuration. The rule I'm using is fine, I can test that locally. But the server I'm working with is somehow configured so that mod_rewrite doesn't attempt to rewrite anything that doesn't end with .php

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  • how do you read from system.out in Java [closed]

    - by Dan
    I'm trying to create a word scramble game and so far I have taken a vector of randomly assorted strings that contains both words and hints and split them into two vectors. I have randomly scrambled the word and set this all up in text boxes. Right now I'm stuck because I have a text box that takes input but I'm not sure how to read that in? I want the user to type the unscrambled word into the text box and have it calculate as correct and move on to the next word immediately. I also don't know how to get the keys working. I want the "?" character to be the hint button that shows the hint. At the moment the hint box works if I type the question mark in using the System.in but it doesn't work if I type it directly in to the text box. The characters are showing up in the text box but nothing is working after that.

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  • Oracle Certification Survey - Becoming Oracle Certified

    - by Paul Sorensen
    At Oracle University, we're interested to know what kinds of challenges you face as you approach your task of getting certified. We know that getting Oracle certified is not an easy process, and we would like your input on which factors tend to be more or less of an issue to you personally. Our hope is that the results of this survey will help not only further improve the Oracle Certification Program but make it more accessible as well.If you are certified, in the process of getting certified, or have ever considered certification - please take a moment to respond to our eight-question survey. It should only take you 3-5 minutes to complete.TAKE THE SURVEY NOW: "BECOMING ORACLE CERTIFIED"(8 questions)Thank you in advance for your participation.

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  • Sending keyboard commands to Ubuntu through Python. Remote for my Blackberry

    - by Rudi Strydom
    I am trying to build a remote control application to control media on my Ubuntu. Does anyone know a way in order to accomplish this. The media keys in particular. Thank you. EDIT 1: I have tried using XTE, but is seems python in truncating the input or there is a limit or something which means that you can't do Ctrl + Key key presses, which wont suit my needs. I also tried uinput, but alas you need to run it as root, which also will not quite my needs. Now I am looking at EVDEV which seems promicing, that is if I can get it working.

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  • Lubuntu 13.04 mysterious occurence of icons appearing to be dragged

    - by Jimmy
    On Lubuntu 13.04 every now and again, it appears as if an icon or file is being dragged across the screen...sometimes very short distances, sometimes longer. It seems to happen a short while after moving around Desktop icons. One or more mock drag and drop operations are visible. It's almost as if the actions are being replayed. What could be causing this? Is this a know issue? (Using nvidia-310-updates driver if any help). Any input would be much appreciated! Thank you Jimmy

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  • Moodle Inconsistencies, Flowplayer, or Server?

    - by dglickler
    We are trying to decide if an issue we're having with Moodle and our videos is a flowplayer issue, a video issue, or a network issue. Any input is welcome. We've had videos in our Moodle (version 1.9, we're working on an upgrade on a different server) up for weeks, or even months. After that time, some of them have suddenly just stopped working. When they don't work, they just don't load. The videos work when we first upload them. With flowplayer, we don't get errors, just a blank screen. We have re-uploaded our videos several times when this has happened, but we really would like to know what's causing it so that we can prevent it. There are also no keyframe issues with the video. We are currently trying to find answers through various searches, but have not had any luck. I will continue to post more info as I come across it...but if there's anyone who knows or has ideas, it's welcome.

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  • Where To Begin To Make A Website

    - by lolyoshi
    I'm a newbie in web programming. I haven't done anything that relates to website before. Now, my new task is creating a website using Java, Jsp, HTML, CSS, mySQL, Apache and Spring Framework (MVC model). I want to know what I should research if I want my website has the function as post entries, comment entries, delete entries, edit entries, etc as a forum? Which I need to know beside above things? I don't know how to update my website automatically when there're changes in website as the top view products, the best products. I don't think I'll input or change them manually. So, which tools or language can support that? Thank for advance

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  • Date Compare Validator Control ASP.NET

    - by Sahanr
    Compare two input dates to avoid invalid dates. In this example I have created two textboxes and namded as "TextBoxSeminarDate" and "TextBoxBookingDeadline". Booking deadline date must be before date to the Seminar date. Therefore I used Operator as "LesThanEqual". I have validated "TextBoxBookingDeadline" value comparing with the "TextBoxSeminarDate" value as follow.   <asp:CompareValidator ID="CompareValidatorBookingDeadline" runat="server" ControlToCompare="TextBoxSeminarDate" ControlToValidate="TextBoxBookingDeadline" Display="Dynamic" ErrorMessage="Please check the seminar date and select appropriate date for booking deadline" Operator="LessThanEqual" Type="Date"  ValueToCompare="<%= TextBoxSeminarDate.Text.ToShortString() %>">*</asp:CompareValidator> The important thing is "ValueToCompare" property of the compare validator. Here I have assined it to the value of the TextboxSeminarDate and then compered it with the booking deadline date.  

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  • 3d vertex translated onto 2d viewport

    - by Dan Leidal
    I have a spherical world defined by simple trigonometric functions to create triangles that are relatively similar in size and shape throughout. What I want to be able to do is use mouse input to target a range of vertices in the area around the mouse click in order to manipulate these vertices in real time. I read a post on this forum regarding translating 3d world coordinates into the 2d viewport.. it recommended that you should multiply the world vector coordinates by the viewport and then the projection, but they didn't include any code examples, and suffice to say i couldn't get any good results. Further information.. I am using a lookat method for the viewport. Does this cause a problem, and if so is there a solution? If this isn't the problem, does anyone have a simple code example illustrating translating one vertex in a 3d world into a 2d viewspace? I am using XNA.

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  • Structure gameobjects and call events

    - by waco001
    I'm working on a 2D tile based game in which the player interacts with other game objects (chests, AI, Doors, Houses etc...). The entire map will be stored in a file which I can read. When loading the tilemap, it will find any tile with the ID that represents a gameobject and store it in a hashmap (right data structure I think?). private static HashMap<Integer, Class<GameObject>> gameObjects = new HashMap<Integer, Class<GameObject>>(); How exactly would I go about calling, and checking for events? I figure that I would just call the update, render and input methods of each gameobject using the hashmap. Should I got towards a Minecraft/Bukkit approach (sorry only example I can think of), where the user registers an event, and it gets called whenever that event happens, and where should I go as in resources to learn about that type of programming, (Java, LWJGL). Or should I just loop through the entire hashmap looking for an event that fits? Thanks waco

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  • How to render RSS feed in a desktop RSS reader?

    - by Thiago Moraes
    Consider one feed like this: http://feeds.feedburner.com/codinghorror It has the entire content inside the description tag of the feed, so you don't need to access the website to read the post. Now I have the problem of creating an interface for a feed like this on a desktop client. What's the best way to render the text in a pleasant way to the user? My first thought was to parse the entire HTML as if I was a web browser, but that looks really hard to do in a satisfying way. Are there any better (faster) alternatives? Rephrasing: how a desktop rss client such as feeddamon parses the input to display it nicely? Does it have a web browser inside it?

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  • Wordpress theme for user generated content website

    - by iamjonesy
    I'm looking for a wordpress theme that I can work from. I'm basically creating a website like the following two http://www.damnyouautocorrect.com/ and http://icanhas.cheezburger.com/ - both are wordpress based websites which I guess are custom made themes. I'm looking for a theme that will let users enter content without beign logged in. Basically the post type has a title and a description and the name of the author. The homepage will show one post with a "Next" button. Clicking that will load the next post. The user content input just needs a title, description, and a name of the author. I'd also like to add voting up/down. I'm just asking first before I start hacking away at a theme.

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  • cross resolution level design advice [on hold]

    - by Mike
    I was looking for some beginner advice regarding level design across multiple resolutions. I believe the answer is likely "it depends", but any input from anyone with real experience is very appreciated. Basically, I am building a 2D Super Metroid type game. If rooms/levels are to be a tiled grid, what are some general best practices for designing rooms when taking into account different resolutions? Since more or less tiles could fit vertically on a single screen depending on the resolution, is it better to design towards possibly having more of the room visible depending on the screen (with a bare minimum needed for gameplay), or should I fix the design at a certain tile height and scale the graphics?

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  • ETPS/" Elantech Touchpad fails detecting single finger

    - by Philipp
    I have a new laptop with an "ETPS/2 Elantech Touchpad". A single finger is only detected, if it is held in such a way that a big area touches the pad. If one touches the pad only with the fingertip, it wil not be detected, both for clicking and for moving the pointer. Strangley, two-finger gestures are detected even if the pad is only touched with the fingertips. On ubuntuusers.de I found that Elantech touchpads require to reload the psmouse-module by: sudo modprobe -r psmouse sudo modprobe psmouse proto=imps If I do this, one finger finally gets detected as it should, but all two or more finger gestures stop working. Also grep -B 5 mouse /proc/bus/input/devices tells that the touchpad now is identified as a mouse, while before the changes it was identified correctly as ETPS/2 Elantech Touchpad.

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  • Rotation based on x coordinate and x velocity?

    - by Lewis
    -(void) accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration { float deceleration = 0.3f, sensitivity = 8.0f, maxVelocity = 150; // adjust velocity based on current accelerometer acceleration playerVelocity.x = playerVelocity.x * deceleration + acceleration.x * sensitivity; // we must limit the maximum velocity of the player sprite, in both directions (positive & negative values) playerVelocity.x = fmaxf(fminf(playerVelocity.x, maxVelocity), -maxVelocity); } Hi, I want to rotate my sprite based on the velocity and accelerometer input. My sprite can move along the X axis like so: <--------- sprite ----------- But it always faces forwards, if it is moving left I want it to point slightly to the left, the degree of how far it is pointing to be judged from the velocity. This should also work for the right. I tried using atan but as the y velocity and position is always the same the function returns 0, which doesn't rotate it at all. Any ideas? Regards, Lewis.

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  • SEO Friendly URL for search keywords

    - by Kyojimaru
    I have a website where you can search for a brands, item, and content inside my web. It was designed with tab for each search type, but I want to make the url when changing the tab user friendly and good for SEO. Is it better to have a url for search result like this www.example.com/search/{search_keyword}/{tab} or www.example.com/search/{search_keyword}?tab={tab} or www.example.com/search/?search={search_keyword}&tab={tab} where {search_keyword} is the keyword that user input, and {tab} is either brands / item / content, because when I look at facebook, stackoverflow, and some other website, they use query string for their search keyword Edit My past url is only www.example.com/search/{search_keyword}, and I just added the tab design recently. Consider that I should go with option 1 from the above option, should I make www.example.com/search/{search_keyword} the default for 1 of the 3 tab, and make the other 2 tab with www.example.com/search/{search_keyword}/{tab} to retain the score for the page, or should I make all the tab url with www.example.com/search/{search_keyword}/{tab} and use a permanent redirect from www.example.com/search/{search_keyword} to one of the url tab

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  • Ubuntu 10.04, I cannot get my computer to connect to the internet

    - by Jared Isaacson
    So at first I was unable to get my Belkin Surf & Share usb to install on my computer, so then I plugged my computer directly into my router and my computer won't acknowledge any connection. I know very little about how to use ubuntu, please help me. What I do know is: I'm using Ubuntu 10.04 Lucid Lynx In my 'edit connections', I go into 'wired' tab, select "wired connection 1" then 'edit' it brings up 4 tab options: Wired (I input the MAC address that's printed on the bottom of my router, MTU is set to automatic) 802.1x Security (currently: not checked) IPv4 Settings (currently: Automatic (DHCP) addresses only) IPv6 Settings (currently: Automatic)

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  • Mouse scroll issue after kernel build

    - by Anish S Kumar
    I have a Intel Cedar Trail netbook. For graphics to work, i had to build kernel 3.1 with the drivers. I followed the steps in this document After doing that, now my graphics is fine, but my mouse scroll does not work. Is that because I have not build the kernel properly? Have i missed selecting some options in the kernel compile menu? It will be nice if someone can help me. Also my wacom bamboo tablet is not recognized, i have installed the xserver-xorg-input-wacom drivers.

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