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• Can SpriteBatch be used to fill a polygon with a texture?

  - by can poyrazoglu

  I basically need to fill a texture into a polygon using the SpriteBatch. I've done some research but couldn't find anything useful except polygon triangulation method, which works well only with convex polygons (without diving into super math which is definitely not something I'm pretty good at). Are there any solutions for filling in a polygon in a basic way? I of course need something dynamic (I'll have a map editor that you can define polygons, and the game will render them (and collision detection will also use them but that's off topic), basically I can't accept solutions like "pre-calculated" bitmaps or anything like that. I need to draw a polygon with the segments provided, to the screen, using the SpriteBatch.

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• Is it possible to design a multiplayer game which can be played from different devices?

  - by user9820

  I want to design a online multiplayer game for all gaming devices e.g. Desktop PC, internet browser, android phones, android tablets, iphone, ipad, XBOX 360 etc. Now my main requirement is that, I want all devices can be used to play the game in multiplayer mode toghether i.e. One player can be connected using PC another using android phone and other may be with iphone or ipad. My doubts are - How to make all devices to connect to common game server? What will be the logic for graphics and texture because all devices screen will be of different aspect ratio?

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• 2D Grid based game - how should I draw grid lines?

  - by Adam K Dean

  I'm playing around with a 2D grid based game idea, and I am using sprites for the grid cells. Let's say there is a 10 x 10 grid and each cell is 48x48, which will have sprites drawn there. That is fine. But in design mode, I'd like to have a grid overlay the screen. I can do this either with sprites (2x600 pixel image etc) or with primitives, but which is best? Should I really be switching between sprites and 3d/2d rendering? Like so: Thanks!

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• terminal won't show in failsafex

  - by Samir Desai

  so after recently reinstalling some drivers I came across the issue detailed in this post How to fix "The system is running in low-graphics mode" error? I run 12.04 on my HP laptop with an Nvidia card. I went to GRUB and loaded failsafex to have the exact same problem described in the response up there, I then attempted to load the terminal, however when I do try and load the terminal I just get a blank screen and nothing else, is there any other easier way to access the terminal. I am quite new to Ubuntu.

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• No wireless network recognized on a Dell Vostro 3560

  - by Itai

  I just installed Ubuntu 12.04 along with Windows 7 on the same laptop - Dell Vostro 3560. Now, on Windows 7 I can access to different wi-fi networks. However, when I am logging onto the Ubuntu section (after re-starting my laptop) - an error message appears: Disconnected - you are now offline When I take a look at my network menu (in the upper bar on the screen), I see that no network is found (and I have a few of them in the area. ). I tried to look around but really could not find a concrete practical solution to this specific problem, would appreciate any solution from anyone out there that had this problem and solved it.

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• How do I prevent useless content load on the page in responsive design?

  - by Ícaro Leandro

  In responsive design, elements are hidden in the page with @media queries and display: none in CSS. Ok. In my design however browsers that have less than 800px in width should avoid loading some content at all. When accessed with on a device with more than 800px of screen, the page loads fully. In mobile devices or even on desktop with less than 800px of width some content is hidden. I want to make the page load faster for low-resolution devices and avoid loading chunks of content that the user will never see. How can I go about this?

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• Why do I get unknown printer error 0xFA on my EPSON Workforce WF-3540 under Ubuntu 12.10?

  - by potofcoffee

  I recently bought an EPSON Workforce WF-3540, which I'm using under Ubuntu 12.10 with the official driver provided by EPSON. I am often printing batches of about a hundred pages, duplex. When I'm doing this, after about 20 pages, I regularly get an error message on the printer screen, telling me the printer encountered unknown error 0xFA, forcing me to turn the printer off and back on. I talked to EPSON about the problem, but they claim they're not supporting Linux and tell me to ask the Linux community about the problem (and possibly another driver?). So this is what I'm doing here... any ideas? Unfortunately, the documentation does not contain any information pertaining to error code 0xFA and the support hotline wasn't able to give me further information, either. BTW, the problem hasn't happened, so far, when I'm printing smaller batches or not using duplex. Whenever the problem happens, there's a page in the printer that's already been printed on one side, so I'm suspecting the problem's connected with the duplexer.

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• How to create Windows XP LiveUSB using Ubuntu to replace it

  - by Orion Clark

  I am using an Acer Aspire One netbook with no CD-disk drive, and would like to uninstall Ubuntu 12.04 LTS and install Windows XP in its place. The problem here is that I can't seem to find a program that can put the windows boot files on a USB drive from an ISO file. I have Ubuntu fully installed and have tried using unetbootin. When I tried booting from unetbootin I got a screen with a blue box that had the word "default" in it highlighted. underneath the box there was a countdown that said "will boot from default in 10" after the countdown finished the number would revert to ten and nothing would happen. Can someone tell me another program that would be useful for this please?

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• What Type of Options should be on the Game Settings Menu?

  - by A13X

  I have seen a post about the main menu options here: UI: Main Menu options for mobile games. What options should be listed? What do users want to see? But I want to know what kind of options should/need to be available on the settings screen. I am making a rather simple 2D game for Android, but really I haven't found many aspects that warrant an options button or a check box besides turning the sound and music on/off. I was thinking graphics settings but then again, how many apps really need graphics settings besides immersive 3D ones?

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• I can't get suspend, hibernate and shutdown to work in Ubuntu 12.04

  - by Fostext

  I recently built a computer with these specs: Asus Motherboard, Intel i3 3.3 GHz dual processor, 8 GB of RAM. I installed 12.04 on a brand new hard drive. I partitioned the hard drive between root, home and swap like I have often read how to do. I cannot get this machine to properly shutdown. I have to hold the power button down now. Although, for the first few days it properly shutdown. I also cannot get the system to hibernate or suspend properly. I have read tons on this and watched many YouTube tutorials on how to fix both, but the computer never wakes up after suspend or hibernate. It just stays on a black screen. Can anyone help? I love 12.04 so far, but these setbacks are making me worried about stability and power management issues. Also, I wonder if it's really bad for the hard drive to force the CPU to shutdown.

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• Upgrade failed, now impossible to restart

  - by Jean Claude Dispaux

  I have an Aspire One with Ubuntu, that I use only when traveling, i.e. seldom. Yesterday I tried to start it, it informed me that I had to install a new release of Ubuntu. The download went fine, then I left it for the night. In the morning I found error messages. I tried to restart, but nothing works any longer. The only backup I have is two USB keys made by the person who installed Ubuntu, that say Recovery Ubuntu 8 and Ubuntu 9.10 respectively. Right now I plugged the "8", selected F12 and instructed to boot from the USB key. It has been running for an hour, the screen still says ubuntu, the USB key flashes red. By the way, I have no precious data on this machine, I do not care about losing data. Please advise on what to do now. Thanks.

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• How to remove permanently those error prompts while using openbox gnome?

  - by YumYumYum

  How to remove permanently those error prompts while using openbox gnome? Such as: update ubuntu latest release, this kind of errors etc, how to permanently disable them so that it does not show in front of my presentation. Follow up: a) How do i kill that screen shot error box? $ cat /etc/default/whoopsie [General] report_crashes=false $ apport-cli *** Send problem report to the developers? After the problem report has been sent, please fill out the form in the automatically opened web browser. What would you like to do? Your options are: S: Send report (69.7 KB) V: View report K: Keep report file for sending later or copying to somewhere else I: Cancel and ignore future crashes of this program version C: Cancel Please choose (S/V/K/I/C): I b) How do i kill that update notification dialog box? $/etc/xdg/autostart# vim update-notifier.desktop #NoDisplay=true NoDisplay=false :wq $ cat update-notifier.desktop | grep NoDisplay NoDisplay=false No more disturbing popup's now.

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• How do I make Nautilus windows stick for drag & drop?

  - by e-satis

  When you drag and drop a folder with nautilus, you must carefully set both windows on non overlapping areas of your screen, otherwise selecting one folder will bring the windows to the front, hiding the second one. On Windows, doing so will stick the explorer.exe windows to the back and let you drag and drop the folder. I suppose it detect a long click to decide whether or not bring the window to the front. Is that possible with Ubuntu? Now I know that Nautilus now has split panels by pressing F3, but that not handy. Most of the time, you open a folder, THEN decide to copy. With split panel, you must decide, THEN split the panel and go to the right folder.

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• Can't disable Alt + mouse buttons combinations

  - by Andrey

  I've already searched through the questions, and didn't find the same question as I want to ask. I'm working in blender and there are some combinations that I am used to and remapping them in blender would be the last resort, not the first. I have tried to disable Alt+LMB and Alt+RMB actions in ccsm, I've tried to do this in dconf or gconf editors as well, but nothing helped. As soon as I close the editors or get back to the main screen of ccsm, these combinations are enabled again. So, for example, instead of selecting an edge loop in blender with Alt+RMB, I get this goddamn menu offering me to move the window to another workspace, etc. I really don't need this function, so I'd rather switch it off instead of remapping the hotkeys I'm used to in blender.

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• Week in Geek: Malware-Infected Web Sites Doubled Since Last Year

  - by Asian Angel

  This week we learned how to get spelling autocorrect across all applications on a Windows system, “diagnose DSL hang ups, extract media files from PowerPoint presentations, & restrict IE to a single website”, customize the Ubuntu bootloader screen, get smartphone-style word suggestion on Windows systems, learned what character encodings are and how they differ, and more. Photo by Profound Whatever.HTG Explains: What Are Character Encodings and How Do They Differ?How To Make Disposable Sleeves for Your In-Ear MonitorsMacs Don’t Make You Creative! So Why Do Artists Really Love Apple?

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• Can not start webhttrack

  - by Sitati

  I am trying to start my webhttrack on ubuntu 12.04 precise pangolin but all i get is the opening screen. When i press any button on the page it gives me the following errors: Oops! Google Chrome could not connect to barney:8081 Suggestions: Try reloading: barney:­8081/­server/­step2.­html i tried to run from a terminal window and get the output here: webhttrack /usr/bin/webhttrack(4405:( launching /usr/bin/x-www-browser /usr/bin/webhttrack(4405:( spawning regular browser.. Created new window in existing browser session. /usr/bin/webhttrack(4405:( browser exited /usr/bin/webhttrack: line 167: 4422 Killed ${BINPATH}/htsserver "${DISTPATH}/" path "${HOME}/websites" lang "${LANGN}" $@ If anyone can help me i appreciate it.

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• Mouse cursor freezes randomly with Intel GMA 950

  - by Harry

  I'm using Ubuntu 10.10 its installed using Wubi, dual boot with Windows. It's fresh install. Randomly mouse cursor freezes and cant click anything on the screen. I can move mouse but cant click. "It causes when select a text something" So I'm using keyboard to to reboot system. Then it back to normal after reboot. Tried with unplugging-plugging mouse don't work. PC: Asus laptop with Intel GMA 950 graphic card. A4 tech optical mouse. Ubuntu 10.10 completely updated and upgraded. How can I get around this?

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• Mouse Cursor Freezes Randomly with Intel GMA 950

  - by Harry

  I'm using Ubuntu 10.10 its installed using Wubi, dual boot with Windows. It's fresh install. Randomly mouse cursor freezes and cant click anything on the screen. I can move mouse but cant click. "It causes when select a text something" So I'm using keyboard to to reboot system. Then it back to normal after reboot. Tried with unplugging-plugging mouse don't work. PC: Asus laptop with Intel GMA 950 graphic card. A4 tech optical mouse. Ubuntu 10.10 completely updated and upgraded. How can I get around this?

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• Sound notification over SSH

  - by Lekensteyn

  I just switched from the Konversation IRC client to the terminal based IRSSI. I'm starting IRSSI on a remote machine using GNU screen + SSH. I do not get any sound notification on new messages, which means that I've to check out IRSSI once in a while for new messages. That's not really productive, so I'm looking for an application / script that plays a sound (preferably /usr/share/sounds/KDE-Im-Irc-Event.ogg and not the annoying beep) on my machine if there is any activity. It would be great if I can disable the notification for certain channels. Or, if that's not possible, some sort of notification via libnotify, thus making it available to GNOME and KDE.

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• Impact of variable-length loops on GPU shaders

  - by Will

  Its popular to render procedural content inside the GPU e.g. in the demoscene (drawing a single quad to fill the screen and letting the GPU compute the pixels). Ray marching is popular: This means the GPU is executing some unknown number of loop iterations per pixel (although you can have an upper bound like maxIterations). How does having a variable-length loop affect shader performance? Imagine the simple ray-marching psuedocode: t = 0.f; while(t < maxDist) { p = rayStart + rayDir * t; d = DistanceFunc(p); t += d; if(d < epsilon) { ... emit p return; } } How are the various mainstream GPU families (Nvidia, ATI, PowerVR, Mali, Intel, etc) affected? Vertex shaders, but particularly fragment shaders? How can it be optimised?

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• WIn API Basic Paint program

  - by Tom Burman

  Just trying to learn a bit of Win API. Im trying to make a basic drawing app, a bit like MS Paint. For the time being im trying to get one function to work which is, when you left click and drag the mouse around the screen a line is drawn behind the mouse. Heres what i have so far, but for some reason: 1) the line starts drawing straight away rather then waiting for the left click 2) the line isn't solid its very dotty. case WM_MOUSEMOVE: { if(MK_LBUTTON){ hdc = GetDC(hwnd); hPen = CreatePen(PS_SOLID,5,RGB(0, 0, 255)); SelectObject(hdc, hPen); int x = LOWORD(lParam); int y = HIWORD(lParam); MoveToEx(hdc,x,y,NULL); LineTo(hdc, LOWORD(lParam), HIWORD(lParam)); ReleaseDC(hwnd,hdc); } else break; } } Thanks for any help!

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• What are good JS libraries for game dev?

  - by acidzombie24

  If I decide to write a simple game both text and graphical (2d) what libraries would I use? (Assume we are using a HTML5 compatible browser) The main things I can think of Rendering text on screen Animating sprites (using images/css) Input (capturing the arrow keys and getting relative mouse positions) Perhaps some preloading resource or dynamically loading resources and choosing order Sound (but I am unsure how important this will be to me at first). Perhaps with mixing and chaining sounds or looping forever until stop. Networking (low priority) to connect a user to another or to continuously GET data without multiple request (I know this exist but I don't know how easy it is to setup or use. But this isn't important to me. Its for the question).

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• Monitor not detected - low resolution only

  - by Jens

  I just installed Ubuntu 11.1 on my desktop pc. It was a clean install, no upgrading. I have a Samsung Syncmaster BX2450 connected to the PC. My problem is that I cannot make Ubuntu recognize my monitor - which is capable of more than 1024. I ran a shut down of lightdm, and ran sudo X -configure, but it gave me a "configuration failed". Nothing seems to work - any ideas? VESA: GF119 Board - 13100000 xx@xxx:~$ lspci -nn |grep VGA 02:00.0 VGA compatible controller [0300]: nVidia Corporation GT520 [GeForce GT520] [10de:1040] (rev a1) xx@xxx:~$ xrandr -q xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 1024 x 768, maximum 1024 x 768 default connected 1024x768+0+0 0mm x 0mm 1024x768 61.0* 800x600 61.0 640x480 60.0

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• How do I show a minimap in a 3D world?

  - by Bubblewrap

  Got a really typical use-case here. I have large map made up of hexagons and at any given time only a small section of the map is visible. To provide an overview of the complete map, I want to show a small 2D representation of the map in a corner of the screen. What is the recommended approach for this in libgdx? Keep in mind the minimap must be updated when the currently visible section changes and when the map is updated. I've found SpriteBatch(info here), but the warning label on it made me think twice: A SpriteBatch is a pretty heavy object so you should only ever have one in your program. I'm not sure I'm supposed to use the one SpriteBatch that I can have on the minimap, and I'm also not sure how to interpret "heavy" in this context. Another thing to possibly keep in mind is that the minimap will probably be part of a larger UI, is there any way to integrate these two?

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• Ask the Readers: How Do You Customize Your Computer?

  - by Jason Fitzpatrick

  Whether you spend your energy customizing via case mods or leave the box stock and re-skin the OS, we’re interested in hearing all about how you customize your computing experience and make the machine yours. This week we want to hear about the OS tweaks, skins, modifications, and other tweaks you’ve applied to your computer to personalize it. Whether it’s minor tweaks at work because IT has the machines locked down or massive custom-built boxes at home that show off your love for your favorite Sci-Fi show, it’s time to share your favorite tools, tricks, and tips for customizing your computing experience–even better, share some screenshots or photos in the comments below. Don’t forget to check back in on Friday for the What You Said roundup! 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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