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  • Libgdx detect when player is outside of screen

    - by Rockyy
    Im trying to learn libGDX (coming from XNA/MonoDevelop), and I'm making a super simple test game to get to know it better. I was wondering how to detect if the player sprite is outside of the screen and make it so it is impossible to go outside of the screen edges. In XNA you could do something like this: // Prevent player from moving off the left edge of the screen if (player.Position.X < 0) player.Position = new Vector2(0, player.Position.Y); How is this achieved in libgdx? I think it's the Stage that handles the 2D viewport in libgdx? This is my code so far: private Texture texture; private SpriteBatch batch; private Sprite sprite; @Override public void create () { float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); batch = new SpriteBatch(); texture = new Texture(Gdx.files.internal("player.png")); sprite = new Sprite(texture); sprite.setPosition(w/2 -sprite.getWidth()/2, h/2 - sprite.getHeight()/2); } @Override public void render () { Gdx.gl.glClearColor(1, 1, 1, 1); Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); if(Gdx.input.isKeyPressed(Input.Keys.LEFT)){ if(Gdx.input.isKeyPressed(Input.Keys.CONTROL_LEFT)) sprite.translateX(-1f); else sprite.translateX(-10.0f); } if(Gdx.input.isKeyPressed(Input.Keys.RIGHT)){ if(Gdx.input.isKeyPressed(Input.Keys.CONTROL_LEFT)) sprite.translateX(1f); else sprite.translateX(10f); } batch.begin(); sprite.draw(batch); batch.end(); }

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  • Critique of SEO of this HTML

    - by Tom Gullen
    I'm designing a new site which I want to be as SEO friendly as possible, fast and responsive, semantic and very accessible. A lot of these things, embarrassingly are quite new to me. Have I miss applied anything? I want the template to be perfect. Live demo: http://69.24.73.172/demos/newDemo/ HTML: <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <title>Welcome to Scirra.com</title> <meta name="description" content="Construct 2, the HTML5 games creator." /> <meta name="keywords" content="game maker, game builder, html5, create games, games creator" /> <link rel="stylesheet" href="css/default.css" type="text/css" /> <link rel="stylesheet" href="plugins/coin-slider/coin-slider-styles.css" type="text/css" /> </head> <body> <div class="topBar"></div> <div class="mainBox"> <header> <div class="headWrapper"> <div class="s searchWrap"> <input type="text" name="SearchBox" id="SearchBox" tabindex="1" /> <div class="s searchIco"></div> </div> <!-- Logo placeholder --> </div> <div class="menuWrapper"><nav> <ul class="mainMenu"> <li><a href="#">Home</a></li> <li><a href="#">Forum</a></li> <li><a href="#" class="mainSelected">Construct</a></li> <li><a href="#">Arcade</a></li> <li><a href="#">Manual</a></li> </ul> <ul class="underMenu"> <li><a href="#">Homepage</a></li> <li><a href="#" class="underSelected">Construct</a></li> <li><a href="#">Products</a></li> <li><a href="#">Community Forum</a></li> <li><a href="#">Contact Us</a></li> </ul> </nav></div> </header> <div class="contentWrapper"> <div class="wideCol"> <div id="coin-slider" class="slideShowWrapper"> <a href="#" target="_blank"> <img src="images/screenshot1.jpg" alt="Screenshot" /> <span> Scirra software allows you to bring your imagination to life </span> </a> <a href="#"> <img src="images/screenshot2.jpg" alt="Screenshot" /> <span> Export your creations to HTML5 pages </span> </a> <a href="#"> <img src="images/screenshot3.jpg" alt="Screenshot" /> <span> Another description of some image </span> </a> <a href="#"> <img src="images/screenshot4.jpg" alt="Screenshot" /> <span> Something motivational to tell people </span> </a> </div> <div class="newsWrapper"> <h2>Latest from Twitter</h2> <div id="twitterFeed"> <p>The news on the block is this. Something has happened some news or something. <span class="smallDate">About 6 hours ago</span></p> <p>Another thing has happened lets tell the world some news or something. Lots to think about. Lots to do.<span class="smallDate">About 6 hours ago</span></p> <p>Shocker! Santa Claus is not real. This is breaking news, we must spread it. <span class="smallDate">About 6 hours ago</span></p> </div> </div> </div> <div class="thinCol"> <h1>Main Heading</h1> <p>Some paragraph goes here. It tells you about the picture. Cool! Have you thought about downloading Construct 2? Well you can download it with the link below. This column will expand vertically.</p> <h3>Help Me!</h3> <p>This column will keep expanging and expanging. It pads stuff out to make other things look good imo.</p> <h3>Why Download?</h3> <p>As well as other features, we also have some other features. Check out our <a href="#">other features</a>. Each of our other features is really cool and there to help everyone suceed.</p> <a href="#" class="s downloadBox" title="Download Construct 2 Now"> <div class="downloadHead">Download</div> <div class="downloadSize">24.5 MB</div> </a> </div> <div class="clear"></div> <h2>This Weeks Spotlight</h2> <div class="halfColWrapper"> <img src="images/spotlight1.png" class="spotLightImg" alt="Spotlight User" /> <p>Our spotlight member this week is Pooh-Bah. He writes good stuff. Read it. <a class="moreInfoLink" href="#">Learn More</a></p> </div> <div class="halfColWrapper r"> <img src="images/spotlight2.png" class="spotLightImg" alt="Spotlight Game" /> <p>Killer Bears is a scary ass game from JimmyJones. How many bears can you escape from? <a class="moreInfoLink" href="#">Learn More</a></p> </div> <div class="clear"></div> </div> </div><div class="mainEnder"></div> <footer> <div class="footerWrapper"> <div class="footerBox"> <div class="footerItem"> <h4>Community</h4> <ul> <li><a href="#">The Blog</a></li> <li><a href="#">Community Forum</a></li> <li><a href="#">RSS Feed</a></li> <li> <a class="s footIco facebook" href="http://www.facebook.com/ScirraOfficial" target="_blank" title="Visit Scirra on Facebook"></a> <a class="s footIco twitter" href="http://twitter.com/Scirra" target="_blank" title="Follow Scirra on Twitter"></a> <a class="s footIco youtube" href="http://www.youtube.com/user/ScirraVideos" target="_blank" title="Visit Scirra on Youtube"></a> </li> </ul> </div> <div class="footerItem"> <h4>About Us</h4> <ul> <li><a href="#">Contact Information</a></li> <li><a href="#">Advertising</a></li> <li><a href="#">History</a></li> <li><a href="#">Privacy Policy</a></li> <li><a href="#">Terms and Conditions</a></li> </ul> </div> <div class="footerItem"> <h4>Want to Help?</h4> <p>You can contribute to the community <a href="#">in lots of ways</a>. We have a large active friendly community, and there are lots of ways to join in!</p> <a href="#" class="ralign"><strong>Learn More</strong></a> </div> <div class="clear"></div> </div> </div> <div class="copyright"> Copyright &copy; 2011 Scirra.com. All rights reserved. </div> </footer> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script> <script type="text/javascript" src="js/common.js"></script> <script type="text/javascript" src="plugins/coin-slider/coin-slider.min.js"></script> <script type="text/javascript" src="js/homepage.js"></script> </body> </html>

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  • WebGL CORS error loading simple texture in Chrome

    - by mathacka
    Here's my code: function loadTexture() { textureImage = new Image(); textureImage.onload = function() { setupTexture(); } textureImage.src = "jumper2.png"; } function setupTexture() { texture = gl.createTexture(); gl.bindTexture(gl.TEXTURE_2D, texture); gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true); // this next line has the error: Uncaught SecurityError: An attempt was made to break through the security policy of the user agent. gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, textureImage); gl.texParameteri(gl.TEXTURE_2D, gl.OES_TEXTURE_FLOAT_LINEAR, gl.NEAREST); if (!gl.isTexture(texture)) { alert("Error: Texture is invalid"); } glProgram.samplerUniform = gl.getUniformLocation(glProgram, "uSampler"); gl.uniform1i(glProgram.samplerUniform, 0); } I've researched it and it is a CORS error a "Cross-origin resource sharing" error, but it's a local file! I can't figure out what's wrong. I did make the picture using gimp, and I'm not sure the coding was right on the export, but I eliminated a previous error using "gl.OES_TEXTURE_FLOAT_LINEAR".

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  • Network and Storage Devices Throughput Chart

    - by zroiy
    With all of the different storage and network devices that surround our day to day life, understanding these devices data transfer speeds can be somewhat confusing. Think about trying to identify your weakest link in the a chain that starts with an external USB hard drive (or a flash drive) that's connected to a 802.11g wifi router, can you quickly come up with an answer of where's the bottle neck in that chain , is it the router or the storage devices ? . Well, the following chart should give you an idea understanding different devices, protocols and interfaces maximum throughput speeds. Though these numbers can fluctuate (mostly for worse, but sometimes for the better) due to different kind of factors such as OS overhead (or caching and optimization) , multiple users or processes and so on , the chart can still serve to provide basic information on the theoretical throughput different devices and protocols can get to.. Enjoy.  Link to the full size chart   References:http://en.wikipedia.org/wiki/Sata#SATA_revision_1.0_.28SATA_1.5_Gbit.2Fs.29http://en.wikipedia.org/wiki/Usbhttp://en.wikipedia.org/wiki/Usb_3http://en.wikipedia.org/wiki/802.11http://mashable.com/2011/09/21/fastest-download-speeds-infographic/http://en.wikipedia.org/wiki/Thunderbolt_(interface)http://www.computerworld.com/s/article/9220434/Thunderbolt_vs._SuperSpeed_USB_3.0  Icons:http://openiconlibrary.sourceforge.net/gallery2/?./Icons/devices/drive-harddisk-3.png      

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  • CodePlex Daily Summary for Thursday, October 10, 2013

    CodePlex Daily Summary for Thursday, October 10, 2013Popular ReleasesDynamics AX 2012 R2 Kitting: First Beta release of Kitting: First Beta release of Kitting Install by using XPO or Models.C# Intellisense for Notepad++: Release v1.0.8.0: - fixed document formatting artifacts To avoid the DLLs getting locked by OS use MSI file for the installation.CS-Script for Notepad++ (C# intellisense and code execution): Release v1.0.8.0: - fixed document formatting artifacts To avoid the DLLs getting locked by OS use MSI file for the installation.Generic Unit of Work and Repositories Framework: v2.0: Async methods for Repostiories - Ivan (@ifarkas) OData Async - Ivan (@ifarkas) Glimpse MVC4 workig with MVC5 Glimpse EF6 Northwind.Repostiory Project (layer) best practices for extending the Repositories Northwind.Services Project (layer), best practices for implementing business facade Live Demo: http://longle.azurewebsites.net/Spa/Product#/list Documentation: http://blog.longle.net/2013/10/09/upgrading-to-async-with-entity-framework-mvc-odata-asyncentitysetcontroller-kendo-ui-gli...Media Companion: Media Companion MC3.581b: Fix in place for TVDB xml issue. New* Movie - General Preferences, allow saving of ignored 'The' or 'A' to end of movie title, stored in sorttitle field. * Movie - New Way for Cropping Posters. Fixed* Movie - Rename of folders/filename. caught error message. * Movie - Fixed Bug in Save Cropped image, only saving in Pre-Frodo format if Both model selected. * Movie - Fixed Cropped image didn't take zoomed ratio into effect. * Movie - Separated Folder Renaming and File Renaming fuctions durin...Ghostscript.NET: Ghostscript.NET v.1.1.1.: v.1.1.1. fixed problem in GhostscriptRasterizer and GhostscriptViewer when MediaBox contains negative llx or lly values. (problem reported by "Prasenjit Das"). added GhostscriptPngDevice, a friendly output device class with all png devices related switches. (GhostscriptPngDevice supports: png16m, pngalpha, pnggray, png256, png16, pngmono, pngmonod). added GhostscriptJpegDevice, a friendly output device class with all jpeg devices related switches. (GhostscriptJpegDevice supports: jpeg, jp...xFunc: xFunc 2.7.3: Fixed memory leak. Small fixes.SmartStore.NET - Free ASP.NET MVC Ecommerce Shopping Cart Solution: SmartStore.NET 1.2.0: HighlightsMulti-store support "Trusted Shops" plugins Highly improved SmartStore.biz Importer plugin Add custom HTML content to pages Performance optimization New FeaturesMulti-store-support: now multiple stores can be managed within a single application instance (e.g. for building different catalogs, brands, landing pages etc.) Added 3 new Trusted Shops plugins: Seal, Buyer Protection, Store Reviews Added Display as HTML Widget to CMS Topics (store owner now can add arbitrary HT...AD ACL Scanner: 1.3: New features:Effective rights, select a security principal and match it agains the permissions in AD. Color coded permissions based on criticality when using effective rights scan. Search levels : Base, One Level, Subtree. List you domains and select one from the list. Get the size of the security descriptor (bytes). Rerporting on disabled inheritance . Better search functianlity; you can use wildcards on Trustee. Get all inherited permissions in report.MoreTerra (Terraria World Viewer): MoreTerra 1.11.2: Release 1.11.2 Full 1.2 Support =========== =Bug Fixes= =========== We have all markers solsund made sure the tile and background colors are correct. (map looks correct with no missing pink) Added better error tracking for those having trouble.Fast YouTube Downloader: Youtube Downloader 2.1: Youtube Downloader 2.1NuGet: NuGet 2.7.1: Released October 07, 2013. Release notes: http://docs.nuget.org/docs/release-notes/nuget-2.7.1 Important note: After downloading the signed build of NuGet.exe, if you perform an update using the "nuget.exe update -self" command, it will revert back to the unsigned build.Mugen MVVM Toolkit: Mugen MVVM Toolkit 2.0: IntroductionMugen MVVM Toolkit makes it easier to develop Silverlight, WPF, WinRT and WP applications using the Model-View-ViewModel design pattern. The purpose of the toolkit is to provide a simple framework and set of tools for getting up to speed quickly with applications based on the MVVM design pattern. The core of Toolkit contains a navigation system, windows management system, models, validation, etc. Mugen MVVM Toolkit contains all the MVVM classes such as ViewModelBase, RelayCommand,...Office Ribbon Project (under active development): Ribbon (07. Oct. 2013): Fixed Scrollbar Bug if DropDown Button is bigger than screen Added Office 2013 Theme Fixed closing the Ribbon caused a null reference exception in the RibbonButton.Dispose if the DropDown was not created yet Fixed Memory leak fix (unhooked events after Dispose) Fixed ToolStrip Selected Text 2013 and 2007 for Blue and Standard themesGhostscript Studio: Ghostscript.Studio v.1.0.2: Ghostscript Studio is easy to use Ghostscript IDE, a tool that facilitates the use of the Ghostscript interpreter by providing you with a graphical interface for postscript editing and file conversions. Ghostscript Studio allows you to preview postscript files, edit the code and execute them in order to convert PDF documents and other formats. The program allows you to convert between PDF, Postscript, EPS, TIFF, JPG and PNG by using the Ghostscript.NET Processor. v.1.0.2. added custom -c s...cmdradio: v0.1.1 binary: Default download in win32. For other OS see here. This is alpha version. Please report all bugs.Squiggle - A free open source LAN Messenger: Squiggle 3.3 Alpha: Allow using environment variables in configuration file (history db connection string, download folder location, display name, group and message) Fix for history viewer to show the correct history entries History saved with UTC timestamp This is alpha release and not recommended for use in productionVidCoder: 1.5.7 Beta: Updated HandBrake core to SVN 4819. About dialog now pulls down HandBrake version from the DLL. Added a confirmation dialog to Stop if the encode has been going on for more than 5 minutes. Fixed handling of unicode characters for input and output filenames. We now encode to UTF-8 before passing to HandBrake. Fixed a crash in the queue multiple titles dialog. Added code to rescue tool windows which get placed outside of the visible screen area.Wsus Package Publisher: Release v1.3.1310.05: Enhance the "Reboot Remote Computers", by adding a timer before the reboot occure. So that remote users can save their documents and close applications. You can also add a message to be display. In 'Tools'->'Settings'-> Misc Tab, you can set a default message. Enhance the "Compare Computers against AD", by choosing OUs to include in the comparison.VG-Ripper & PG-Ripper: PG-Ripper 1.4.19: NEW: Added Option to login as Guest NEW: Added Menu Option to delete an Forum Account NEW: Added Support for "ImageTeam.org links FIXED: Fixed Ripping of http://forum.babeunion.com ForumsNew ProjectsAphid: Aphid is an embeddable, cross-platform, multi-paradigm, and highly interoperable .NET scripting language.CCSP: De online plek voor de V-ICT-OR CCSP communityCLOSED: CLOSEDCorporation Wars: Corporation WarsEntityFramework.BulkInsert: Bulk insert extension for EntityFramework 5. Can be used with Code First approach only.HelpersLib: Simple set of helper libs to aid you with DVLUP challenges or general WP improvementsID3 Algorithm: ID3 algorithm from Machine Learning field. ID3 was implemented in .NET 4.0 using WinForms and C#.Impacta - C# - módulo II: Roteiro de aula para o módulo II de C# da Impacta.InstaSharp: InstaSharp is a C# library that wraps the Instagram API and makes it easy to write applications with Instagram data.iRateMyApp: Project Title iRateMyApp Project Description This is a project for Assignment 2 of Web Scripting and Content Creation (University of Hertfordshire) The projeiRateMyApps: This is a project for Assignment 2 of Web Scripting and Content Creation (University of Hertfordshire)MapLite: Android Tile Map, fork from osmdroidMileage Demo: This is a quick tool to help keep track of your mileage and translate the results to multiple output formats.multiples3and5: Small projectNido Framework with .Net 4.0 and Entity Framework help you standardize your BLL.: Nido is a reusable generic code library developed using .NET/ C# (4.0, EF) providing a common platform (Web, Windows Form, Web Service, Services and Libraries).pgist: gist, GitHubpsi56: ??ERPSharePoint QB Rating App: QB Rating App is a SharePoint 2013 App that calculates a QB's NFL and NCAA passing efficiency ratings.TFS PS Integration Editor: TFS PS Integration Editor is a tool that manage the main functionally of "TfsAdmin ProjectServer" command line tool.Tfs Test: A test TFS project.Windows Service Manager: The Service Manager is management of “Services”, wither these services are local (instance) or remote. Features 1. Start, Stop and Restart service. Work Smart: Work Smart helps prevent computer related health issues.XcbWeiXin: haha

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  • VBO and shaders confusion, what's their connection?

    - by Jeffrey
    Considering OpenGL 2.1 VBOs and 1.20 GLSL shaders: When creating an entity like "Zombie", is it good to initialize just the VBO buffer with the data once and do N glDrawArrays() calls per each N zombies? Is there a more efficient way? (With a single call we cannot pass different uniforms to the shader to calculate an offset, see point 3) When dealing with logical object (player, tree, cube etc), should I always use the same shader or should I customize (or be able to customize) the shaders per each object? Considering an entity class, should I create and define the shader at object initialization? When having a movable object such as a human, is there any more powerful way to deal with its coordinates than to initialize its VBO object at 0,0 and define an uniform offset to pass to the shader to calculate its real position? Could you make an example of the Data Oriented Design on creating a generic zombie class? Is the following good? Zombielist class: class ZombieList { GLuint vbo; // generic zombie vertex model std::vector<color>; // object default color std::vector<texture>; // objects textures std::vector<vector3D>; // objects positions public: unsigned int create(); // return object id void move(unsigned int objId, vector3D offset); void rotate(unsigned int objId, float angle); void setColor(unsigned int objId, color c); void setPosition(unsigned int objId, color c); void setTexture(unsigned int, unsigned int); ... void update(Player*); // move towards player, attack if near } Example: Player p; Zombielist zl; unsigned int first = zl.create(); zl.setPosition(first, vector3D(50, 50)); zl.setTexture(first, texture("zombie1.png")); ... while (running) { // main loop ... zl.update(&p); zl.draw(); // draw every zombie }

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  • Give Chromium-Based Browser Desktop Notifications a Native System Look in Ubuntu

    - by Asian Angel
    Desktop notifications from Chromium-based browsers are an awesome feature, but they do not blend in well at all with the native system theming in Ubuntu. Now you can fix that small problem using the wonderful Chromify-OSD extension created by Marco Ceppi. Once you get the extension installed you can give it a quick test run using the link and information we have listed below. As you can see in the image above the new notification style looks absolutely wonderful. Chromify-OSD (Chrome Web Store) [via OMG! Ubuntu!] You can test the new look of the notifications for yourself using the following webpage. Keep in mind that the extension needs to be installed first before this will work though. Note: Enter the following image URL into the Icon Blank (http://www.rgraph.net/images/logo.png) or the URL for an appropriate image, otherwise the notification may not work properly during your test. Chromify Sample HTML5 Notification Test Page The wallpaper shown in the screenshot above can be downloaded here: anime sport [DesktopNexus] Latest Features How-To Geek ETC How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware The Citroen GT – An Awesome Video Game Car Brought to Life [Video] Final Man vs. Machine Round of Jeopardy Unfolds; Watson Dominates Give Chromium-Based Browser Desktop Notifications a Native System Look in Ubuntu Chrome Time Track Is a Simple Task Time Tracker Google Sky Map Turns Your Android Phone into a Digital Telescope Walking Through a Seaside Village Wallpaper

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  • how to double buffer in multiple classes with java

    - by kdavis8
    I am creating a Java 2D video game. I can load graphics just fine, but when it gets into double buffering I have issues. My source code package myPackage; import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Image; import java.awt.Toolkit; import java.awt.image.BufferStrategy; import java.awt.image.BufferedImage; import javax.swing.JFrame; public class GameView extends JFrame { private BufferedImage backbuffer; private Graphics2D g2d; public GameView() { setBounds(0, 0, 500, 500); setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); backbuffer = new BufferedImage(getHeight(), getWidth(), BufferedImage.TYPE_INT_BGR); g2d = backbuffer.createGraphics(); Toolkit tk = Toolkit.getDefaultToolkit(); Image img = tk.getImage(this.getClass().getResource("cage.png")); g2d.setColor(Color.red); //g2d.drawString("Hello",100,100); g2d.drawImage(img, 100, 100, this); repaint(); } public static void main(String args[]) { new GameView(); } public void paint(Graphics g) { g2d = (Graphics2D)g; g2d.drawImage(backbuffer, 0, 0, this); } }

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  • Does it matter the direction of a Huffman's tree child node?

    - by Omega
    So, I'm on my quest about creating a Java implementation of Huffman's algorithm for compressing/decompressing files (as you might know, ever since Why create a Huffman tree per character instead of a Node?) for a school assignment. I now have a better understanding of how is this thing supposed to work. Wikipedia has a great-looking algorithm here that seemed to make my life way easier. Taken from http://en.wikipedia.org/wiki/Huffman_coding: Create a leaf node for each symbol and add it to the priority queue. While there is more than one node in the queue: Remove the two nodes of highest priority (lowest probability) from the queue Create a new internal node with these two nodes as children and with probability equal to the sum of the two nodes' probabilities. Add the new node to the queue. The remaining node is the root node and the tree is complete. It looks simple and great. However, it left me wondering: when I "merge" two nodes (make them children of a new internal node), does it even matter what direction (left or right) will each node be afterwards? I still don't fully understand Huffman coding, and I'm not very sure if there is a criteria used to tell whether a node should go to the right or to the left. I assumed that, perhaps the highest-frequency node would go to the right, but I've seen some Huffman trees in the web that don't seem to follow such criteria. For instance, Wikipedia's example image http://upload.wikimedia.org/wikipedia/commons/thumb/8/82/Huffman_tree_2.svg/625px-Huffman_tree_2.svg.png seems to put the highest ones to the right. But other images like this one http://thalia.spec.gmu.edu/~pparis/classes/notes_101/img25.gif has them all to the left. However, they're never mixed up in the same image (some to the right and others to the left). So, does it matter? Why?

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  • Strategy for managing lots of pictures for a website

    - by Nate
    I'm starting a new website that will (hopefully) have a lot of user generated pictures. I'm trying to figure out the best way to store and serve these pictures. The CMS I'm using (umbraco) has a media library that puts a folder on the server for each image. Inside of there you can have different sizes of that same image. That folder has an ID on it and the database has additional information for that image along with the ID of the folder. This works great for small sites, but what if the pictures get up to 10,000, 100,000 or 1,000,000? It seems like the lookup on the directory would take a long time to find the correct folder. I'm on windows 2008 if that makes a difference. I'm not so worried about load. I can load balance my server pretty easily and replicate the images across the servers. The nature of the site won't have a lot of users on it either, but it could have a lot of pics. Thanks. -Nate EDIT After some thought I think I'm going to create a directory for each user under a root image folder then have user's pictures under that. I would be pretty stoked if I had even 5,000 users, so that shouldn't be too bad of a linear lookup. If it does get slow I will break it down into folders like /media/a/adam/image123.png. If it ever gets really big I will expand the above method to build a bigger tree. That would take a LOT of content though.

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  • How do graphics programmers deal with rendering vertices that don't change the image?

    - by canisrufus
    So, the title is a little awkward. I'll give some background, and then ask my question. Background: I work as a web GIS application developer, but in my spare time I've been playing with map rendering and improving data interchange formats. I work only in 2D space. One interesting issue I've encountered is that when you're rendering a polygon at a small scale (zoomed way out), many of the vertices are redundant. An extreme case would be that you have a polygon with 500,000 vertices that only takes up a single pixel. If you're sending this data to the browser, it would make sense to omit ~499,999 of those vertices. One way we achieve that is by rendering an image on a server and and sending it as a PNG: voila, it's a point. Sometimes, though, we want data sent to the browser where it can be rendered with SVG (or canvas, or webgl) so that it can be interactive. The problem: It turns out that, using modern geographic data sets, it's very easy to overload SVG's rendering abilities. In an effort to cope with those limitations, I'm trying to figure out how to visually losslessly reduce a data set for a given scale and map extent (and, if necessary, for a known map pixel width and height). I got a great reduction in data size just using the Douglas-Peucker algorithm, and I believe I was able to get it to keep the polygons true to within one pixel. Unfortunately, Douglas-Peucker doesn't preserve topology, so it changed how borders between polygons got rendered. I couldn't readily find other algorithms to try out and adapt to the purpose, but I don't have much CS/algorithm background and might not recognize them if I saw them.

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  • Bizarre image loading problem from apache2

    - by NateDSaint
    Users have complained a few times about seeing a bizarre set of pink or green stripes on our webpage. At first I thought there were a rash of video card outages, but then someone sent me a screenshot from their browser (IE8). I later saw the same thing, but with slightly different colors on Chrome. Users have experienced this on their iPads and iPhones (iOS Safari). Because I've optimized the site to cache images, the bad image stays around until you clear your cache, so once you do, it resolves itself. My assumption is that the transmission of the image is being cut off mid-stream and then staying that way, but I can't for the life of me figure out why. Here's what I've checked: Header length is being sent, and transmission looks okay (wget sample below): wget http://www.superiorlivestock.com/templates/sla2/images/wallbg2.jpg --2012-04-05 08:46:00-- http://www.superiorlivestock.com/templates/sla2/images/wallbg2.jpg Resolving www.superiorlivestock.com (www.superiorlivestock.com)... [ip redacted] Connecting to www.superiorlivestock.com (www.superiorlivestock.com)|[ip redacted]|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 45926 (45K) [image/jpeg] Saving to: `wallbg2.jpg' Images are not being served gzipped (apache conf below): SetOutputFilter DEFLATE SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary The site is www.superiorlivestock.com, and here's a sample of the bad page load: Is there something obvious I'm missing? Am I saving my images in the wrong format somehow?

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  • Strategy for managing lots of pictures for a website

    - by Nate
    I'm starting a new website that will (hopefully) have a lot of user generated pictures. I'm trying to figure out the best way to store and serve these pictures. The CMS I'm using (umbraco) has a media library that puts a folder on the server for each image. Inside of there you can have different sizes of that same image. That folder has an ID on it and the database has additional information for that image along with the ID of the folder. This works great for small sites, but what if the pictures get up to 10,000, 100,000 or 1,000,000? It seems like the lookup on the directory would take a long time to find the correct folder. I'm on windows 2008 if that makes a difference. I'm not so worried about load. I can load balance my server pretty easily and replicate the images across the servers. The nature of the site won't have a lot of users on it either, but it could have a lot of pics. Thanks. -Nate EDIT After some thought I think I'm going to create a directory for each user under a root image folder then have user's pictures under that. I would be pretty stoked if I had even 5,000 users, so that shouldn't be too bad of a linear lookup. If it does get slow I will break it down into folders like /media/a/adam/image123.png. If it ever gets really big I will expand the above method to build a bigger tree. That would take a LOT of content though.

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  • How to prevent 2D camera rotation if it would violate the bounds of the camera?

    - by Andrew Price
    I'm working on a Camera class and I have a rectangle field named Bounds that determines the bounds of the camera. I have it working for zooming and moving the camera so that the camera cannot exit its bounds. However, I'm a bit confused on how to do the same for rotation. Currently I allow rotating of the camera's Z-axis. However, if sufficiently zoomed out, upon rotating the camera, areas of the screen outside the camera's bounds can be shown. I'd like to deny the rotation assuming it meant that the newly rotated camera would expose areas outside the camera's bounds, but I'm not quite sure how. I'm still new to Matrix and Vector math and I'm not quite sure how to model if the newly rotated camera sees outside of its bounds, undo the rotation. Here's an image showing the problem: http://i.stack.imgur.com/NqprC.png The red is out of bounds and as a result, the camera should never be allowed to rotate itself like this. This seems like it would be a problem with all rotated values, but this is not the case when the camera is zoomed in enough. Here are the current member variables for the Camera class: private Vector2 _position = Vector2.Zero; private Vector2 _origin = Vector2.Zero; private Rectangle? _bounds = Rectangle.Empty; private float _rotation = 0.0f; private float _zoom = 1.0f; Is this possible to do? If so, could someone give me some guidance on how to accomplish this? Thanks. EDIT: I forgot to mention I am using a transformation matrix style camera that I input in to SpriteBatch.Begin. I am using the same transformation matrix from this tutorial.

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  • Ubuntu 12.04 - Brightness controls not working

    - by Juan Manuel Zolezzi Volpi
    Controls from "Brightness and Lock" were not working so I've tried a solution that involved changing grub, which I'm detailing below: # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 #GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX="quiet splash acpi_backlight=vendor" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" After doing this, the brightness control dissapeared like you can see at http://screencloud.net/img/screenshots/6b90d56604b70cc749a632d0bc005a20.png Any ideas? Would love to be able to configure Brightness or even use apps like F.lux to regulate it automatically. Edit: I've modified the following line to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=" and now the brightness controls are back, but whatever I change the brightness remains the same. Just in case I'm using Intel H77

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  • Remove IP address from the URL of website using apache

    - by sapatos
    I'm on an EC2 instance and have a domain domain.com linked to the EC2 nameservers and it happily is serving my pages if I type domain.com in the URL. However when the page is served it resolves the url to: 1.1.1.10/directory/page.php. Using apache I've set up the following VirtualHost, following examples provided at http://httpd.apache.org/docs/2.0/dns-caveats.html Listen 80 NameVirtualHost 1.1.1.10:80 <VirtualHost 1.1.1.10:80> DocumentRoot /var/www/html/directory ServerName domain.com # Other directives here ... <FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)$"> Header set Cache-Control "max-age=290304000, public" </FilesMatch> </VirtualHost> However I'm not getting any changes to how the URL is displayed. This is the only VirtualHost configured on this site and I've confirmed its the one being used as I've managed to break it a number of times whilst experimenting with the configuration. The route53 entries I have are: domain.com A 1.1.1.10 domain.com NS ns-11.awsdns-11.com ns-111.awsdns-11.net ns-1111.awsdns-11.org ns-1111.awsdns-11.co.uk domain.com SOA ns-11.awsdns-11.com. awsdns-hostmaster.amazon.com. 1 1100 100 1101100 11100

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  • Ogre3d particle effect causing error in iPhone

    - by anu
    1) First I have added the Particle Folder from the OgreSDK( Contains Smoke.particle) 2) Added the Smoke.material And smoke.png and smokecolors.ong 3) After this I added the Plugin = Plugin_ParticleFX in the plugins.cfg Here is my code: #Defines plugins to load # Define plugin folder PluginFolder=./ # Define plugins Plugin=RenderSystem_GL Plugin=Plugin_ParticleFX 4) I have added the particle path in the resources.cfg( adding the particle file in this get crash ) #Resource locations to be added to the 'bootstrap' path # This also contains the minimum you need to use the Ogre example framework [Bootstrap] Zip=media/packs/SdkTrays.zip # Resource locations to be added to the default path [General] FileSystem=media/models FileSystem=media/particle FileSystem=media/materials/scripts FileSystem=media/materials/textures FileSystem=media/RTShaderLib FileSystem=media/RTShaderLib/materials Zip=media/packs/cubemap.zip Zip=media/packs/cubemapsJS.zip Zip=media/packs/skybox.zip 6) Finally I did all the settings, my code is here: mPivotNode = OgreFramework::getSingletonPtr()->m_pSceneMgr->getRootSceneNode()->createChildSceneNode(); // create a pivot node // create a child node and attach an ogre head and some smoke to it Ogre::SceneNode* headNode = mPivotNode->createChildSceneNode(Ogre::Vector3(100, 0, 0)); headNode->attachObject(OgreFramework::getSingletonPtr()->m_pSceneMgr->createEntity("Head", "ogrehead.mesh")); headNode->attachObject(OgreFramework::getSingletonPtr()->m_pSceneMgr->createParticleSystem("Smoke", "Examples/Smoke")); 7) I run this, I got the below error: An exception has occurred: OGRE EXCEPTION(2:InvalidParametersException): Cannot find requested emitter type. in ParticleSystemManager::_createEmitter at /Users/davidrogers/Documents/Ogre/ogre-v1-7/OgreMain/src/OgreParticleSystemManager.cpp (line 353) 8) Getting crash at: (void)renderOneFrame:(id)sender { if(!OgreFramework::getSingletonPtr()->isOgreToBeShutDown() && Ogre::Root::getSingletonPtr() && Ogre::Root::getSingleton().isInitialised()) { if(OgreFramework::getSingletonPtr()->m_pRenderWnd->isActive()) { mStartTime = OgreFramework::getSingletonPtr()->m_pTimer->getMillisecondsCPU(); //( getting crash here) Does anyone know what could be causing this?

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  • Aligning text to the bottom of a div: am I confused about CSS or about blueprint? [closed]

    - by larsks
    I've used Blueprint to prototype a very simple page layout...but after reading up on absolute vs. relative positioning and a number of online tutorials regarding vertical positioning, I'm not able to get things working the way I think they should. Here's my html: <div class="container" id="header> <div class="span-4" id="logo"> <img src="logo.png" width="150" height="194" /> </div> <div class="span-20 last" id="title"> <h1 class="big">TITLE</h1> </div> </div> The document does include the blueprint screen.css file. I want TITLE aligned with the bottom of the logo, which in practical terms means the bottom of #header. This was my first try: #header { position: relative; } #title { font-size: 36pt; position: absolute; bottom: 0; } Not unexpectedly, in retrospect, this puts TITLE flush left with the left edge of #header...but it failed to affect the vertical positioning of the title. So I got exactly the opposite of what I was looking for. So I tried this: #title { position: relative; } #title h1 { font-size: 36pt; position: absolute; bottom: 0; } My theory was that this would allign the h1 element with the bottom of the containing div element...but instead it made TITLE disappear, completely. I guess this means that it's rendering off the visible screen somewhere. At this point I'm baffled. I'm hoping someone here can point me in the right direction. Thanks!

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  • Rotate a particle system

    - by Blueski
    Languages / Libraries in use: C++, OpenGL, GLUT Okay, here's the deal. I've got a particle system which shoots out alpha blended textures to produce a flame. The system only keeps track of very basic things such as, time alive, life, xyz and spread. The direction in which the flames are currently moving in is purely based on other things which are going on in my code ( I assume ). My goal however, is to attach the flame to the camera (DONE) and have the flame pointing in the direction my camera is facing (NOT WORKING). I've tried glRotate for both x,y,z and I can't get it to work properly. I'm currently using gluLookAt to move the camera, and get the flame to follow the XYZ of the camera by calling glTranslatef(camX, camY - offset, camZ); Any suggestions on how I can rotate the direction of the flame with the camera would be greatly appreciated. Heres an image of what I've got: http://i.imgur.com/YhV4w.png Notes: Crosshair depicts where camera is facing if I turn the camera, flame doesn't follow the crosshair Also asked here: http://stackoverflow.com/questions/9560396/rotate-a-particle-system but was referred here

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  • DNS records on website.. What are they for?

    - by Blake Nic
    Recently we had to get some ddos protection for our website because of the large attacks we were seeing after getting a bit of popularity. We handed over our domain and hosting information to our ddos protection provider. It worked perfectly but I have a question. On our DNS records we have the Host and Answer and Type. The Host has our domain name there. The answer is this: SOMETEXTXXXX.dv.googlehosted.com. And when i copy and paste it into my browser it gives me a 404 error. But our website still loads and functions as it should. I don't understand why it would need this? I asked them about this and they said it is a method for ddos protection and the other IPs are the reverse proxy (the other ips give a 404 error too). Can anyone expand on this more please. How does all this tie in together and make the internet browser know where to point the person with all these reverse proxies and stuff I don't understand. Thank you. Here is an image for reference: http://i.stack.imgur.com/qo5QO.png

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  • Making a 2D game with responsive resolution

    - by alexandervrs
    I am making a 2D game, however I wish for it to be resolution agnostic. My target resolution i.e. where things look as intended is 1600 x 900. My ideas are: Make the HUD stay fixed to the sides no matter what resolution, use different size for HUD graphics under a certain resolution and another under a certain large one. Use large HD PNG sprites/backgrounds which are a power of 2, so they scale nicely. No vectors. Use the player's native resolution. Scale the game area (not the HUD) to fit (resulting zooming in some and cropping the game area sides if necessary for widescreen, no stretch), but always fill the screen. Have a min and max resolution limit for small and very large displays where you will just change the resolution(?) or scale up/down to fit. What I am a bit confused though is what math formula I would use to scale the game area correctly based on the resolution no matter the aspect ratio, fully fit in a square screen and with some clip to the sides for widescreen. Pseudocode would help as well. :)

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  • capture login screen-not sucssecful

    - by yinon
    I'm using Ubuntu 12.04 . If more information is needed, please tell me. I Tried some guides to cature my login screen: How can I take a screenshot of the login screen? http://www.howtoforge.com/how-to-take-a-screenshot-of-your-login-screen I tried the first one, but after running: $ sudo bash /tmp/shot.sh >/tmp/shot.xwd I'm getting this: No protocol specified No protocol specified xwd unable to open display ':0' and i'm getting an xwd file in my tmp folder. running the other commands giving errors. tried the second one, after running: chvt 8; sleep 5; XAUTHORITY=/var/gdm/:0.Xauth DISPLAY=:0.0 import -window root /tmp/gdm-login-shot.png I got: No protocol specified No protocol specified import: unable to open X server ':0.0' @ error/import.c/ImportImageCommand/366 Many Thanks for helping (: EDIT to vine_user: here the output from the terminal-I cacked it from within the system while I'm looged in: ubuntu@PrecisePangolin:~$ echo 'sleep 5; DISPLAY=:0 XAUTHORITY=/var/run/lightdm/root/$DISPLAYDISPLAY xwd -root' > /tmp/shot.sh ubuntu@PrecisePangolin:~$ sudo bash /tmp/shot.sh >/tmp/shot.xwd bash: /tmp/shot.xwd: Permission denied ubuntu@PrecisePangolin:~$ sudo su root@PrecisePangolin:/home/ubuntu# sudo bash /tmp/shot.sh >/tmp/shot.xwd No protocol specified No protocol specified xwd: unable to open display ':0' root@PrecisePangolin:/home/ubuntu# EDIT 2!: HERE IT IS!: just uploading-this uploadong site is better than other iuset to use (: :

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  • how to find and filter blobs from segment image using python?

    - by Python Team
    Am trying to detect number plate from an image.I have converted an image to grayscale and segment image. Now i have to find and filter blobs from an image and to detect number plate from an image. I will explain what i did.. I jus read segment image license_plate = cv2.imread('license1_segmented.png',cv2.CV_LOAD_IMAGE_COLOR) license_plate_size = (license_plate.shape[1], license_plate.shape[0]) mask = cv2.cv.CreateImage (license_plate_size, 8, 1) cv2.cv.Set(mask, 1) thresh_image_ipl = cv2.cv.CreateImage(license_plate_size, cv2.cv.IPL_DEPTH_8U, 1) cv2.cv.SetData(thresh_image_ipl,thresh_image.tostring(),thresh_image.dtype.itemsize * 1 * thresh_image.shape[1]) min_blob_size = 100 # Blob must be 30 px by 30 px max_blob_size = 10000 threshold = 100 **myblobs = CBlobResult(thresh_image_ipl,mask, threshold, True)** myblobs.filter_blobs(min_blob_size, max_blob_size) blob_count = myblobs.GetNumBlobs() trying to find and filter blobs from an image.But am getting error while passing the parameters to CBlobResult which i highlighted above code.I mentioned the error below what i get while passing. Traceback (most recent call last): File "rectdetect1.py", line 110, in <module> myblobs = CBlobResult(thresh_image_ipl,image_area, threshold, True) File "/home/oomsys/pyblobs-read-only/blobs/BlobResult.py", line 92, in __init__ this = _BlobResult.new_CBlobResult(*args) NotImplementedError: Wrong number or type of arguments for overloaded function 'new_CBlobResult'. Possible C/C++ prototypes are: CBlobResult::CBlobResult() CBlobResult::CBlobResult(IplImage *,IplImage *,int,bool) CBlobResult::CBlobResult(CBlobResult const &) Anyone help me to find out the erros and to solve this and all... Thanks in advance...

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  • Making an interactive 2D map

    - by Chad
    So recently I have been working on a Legend of Zelda: A Link to the Past clone, and I am wondering how I could handle certain map interactions (like cutting grass, lifting rocks, etc). The way I am currently doing the tilemap is with 2 PNGs. The first is the "tilemap" where each pixel represents a 16x16 tile and the (red, green) values are the (x, y) coords for the tile in the second PNG (the "tileset"). I am then using the blue channel to store collision data. Each tile is split into 4 8x8 tiles and represented by a 2 bit value (0 = empty, 1 = Jumpdown point, 2 = unused right now, 3 = blocking). 4 of these 2 bit values make up the full blue channel (1 byte). So collisions work great, and I am moving on to putting interactive units on the level; but I am not sure what a good way is to do it. I have experimented with spawning an entity for each grass and rock, but there are just WAY to many; FPS just dies even if I confine it to the current "zone" the user is in (for those who remember LTTP it had zones you moved between). It does make a difference that this is a browser-based JavaScript game. tl;dr: What is a good way to have an interactive map without using full blown entities for each interactive item?

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  • Greiner-Hormann clipping problem

    - by Belgin
    I have a set of planar polygons in 3D space defined by their vertices in counterclockwise order. Let's define the 'positive face' as being the face of the 3D polygon such as when observed, the vertices appear in counterclockwise order, and the 'negative face', the face which when observed, the vertices appear in clockwise order. I'm doing perspective projection of the set of polygons onto a projection polygon defined by the points in this order: (0, h, 0), (0, 0, 0), (w, 0, 0), and (w, h, 0), where w and h are strictly positive integers. The positive face of this projection polygon is oriented towards positive Z, and the camera point is somewhere at (0, 0, d), where d is a strictly negative number. In order to 'clip' the projected polygons into the projection polygon, I'm applying the Greiner-Hormann (PDF) clipping algorithm, which requires that the clipper and the to-be-clipped polygons be in the same order (i.e. clockwise or counterclockwise). My question is the following: How can I determine whether the projected face of the 3D polygon is the negative or the positive one? Meaning, how do I find out if I have to work with the vertices in normal or inverted order for the algorithm to work? I noticed that only if the 3D polygon is facing the projection polygon with its negative face, both of them are in the same order (counterclockwise), otherwise, a modification needs to be done. Here is a picture (PNG) that illustrates this. Note that the planes described by the polygon from the set and the projection polygon may not always be parallel.

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