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• Where is Nautilus icon file located and how is it chosen?

  - by Steve

  When I plug my Garmin Nuvi 265 GPS device into my computer via a USB cable, it mounts as a drive with a blue triangle icon instead of the default gray hard drive icon. HOW does Nautilus know how to do this? After much laborious searching, I found that the icon info is stored in ~/.gconf/apps/nautilus/desktop-metadata/GARMIN@46@volume/gconf.xml -- but only when a custom icon is selected. So Where is this blue icon file? Why does Nautilus use it instead of the plain drive icon? Is there a way to have give each of my drives a custom icon -- so that when I stick in my various flash drives, they have a distinctive icon (i.e. a 'favicon.ico' file on root or such?) Using Gnome 2.30.2 on Ubuntu 10.04.

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• Language-independent sources on collision detection

  - by Phazyck

  While making a Pong clone with a friend, we had to implement some collision detection. For research purposes, my friend dug up a book called "AdvancED Game Design with Flash" by Rex Van Der Spuy. This book was clearly targeted at implementing collision detection in ActionScript, and I also have some problems with how the concepts are presented, e.g. presenting one method as better than another, without explaining that decision. Can anyone recommend some good material on collision detection? I'd prefer it if kept the implementation details as language-independent as possible, e.g. by implementing the concepts in pseudo-code. Language-specific materials are not completely unwelcome though, though I'd prefer those to be in either Java, C#, F# or Python or similar languages, as those are the ones I'm most familiar with. :-) Lastly, is there perhaps widely known and used book on collision detection that most people should know about, like a 'the book on collision detection'?

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• Looking for games in environments similar to a pinball table

  - by chaosTechnician

  I'm on a team of students working on a third-person adventure game that takes place inside a pinball machine (like, small scale, on the surface, avoiding pinballs, etc). One of my responsibilities on the project is to find games that are similar to this concept in appearance and/or gameplay for reference. So, does anyone know of games (other than pinball) that takes place in a pinball-like environment? Or, adventure games that take place in small, cramped environments with multiple paths around the world? Or games in which the player is often bombarded with balls (or other similar unintelligent obstacles)? Or games that take place on a small scale?

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• Reversi/Othello early-game evaluation function

  - by Vladislav Il'ushin

  I've written my own Reversi player, based on the MiniMax algorithm, with Alpha-Beta pruning, but in the first 10 moves my evaluation function is too slow. I need a good early-game evaluation function. I'm trying to do it with this matrix (corresponding to the board) which determines how favourable that square is to have: { 30, -25, 10, 5, 5, 10, -25, 30,}, {-25, -25, 1, 1, 1, 1, -25, -25,}, { 10, 1, 5, 2, 2, 5, 1, 10,}, { 5, 1, 2, 1, 1, 2, 1, 5,}, { 5, 1, 2, 1, 1, 2, 1, 5,}, { 10, 1, 5, 2, 2, 5, 1, 10,}, {-25, -25, 1, 1, 1, 1, -25, -25,}, { 30, -25, 10, 5, 5, 10, -25, 30,},}; But it doesn't work well. Have you even written an early-game evaluation function for Reversi?

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• Lag compensation of projectile shooting game

  - by Denis Ermolin

  I'm thinking about an algorithm for firing projectiles with lag compensation. Now I did find only one descent solution: Player hits fire button. Client sends input "fire". Client waits for server response. Server generates bullet then sends response to client. Client recieves response and finally fires projectile. Is this solution only "trueway"? I find it the only one that can be fair to all of the clients. Valve in this case, doesn't compensate lag from rocket shots. I am feeling that I will not compensate it, too. I think that with today's bandwidth I can close my eyes on this problem, because I don't see any solutions with fair logic. What do you think?

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• How do I play HD video without it stuttering?

  - by hugocreal

  Hello All, I want play a Blu Ray Video from my hard drive with Boxee, but it chokes all the time. I've tried to play it with others video players but it is the same. I think that is a 10gb .mkv file with 10Gb. Stuttering video with VLC , mplayer, and the default video player on ubuntu. I read in many Forums just can´t put this to work. Any idea? thanks. Ubuntu 10.10, My PC specs: Single Core 2Ghz ATI HD 4350 (i have installed the drivers from "Hardware Drivers"), 2G Memory *EDIT: Problem solved, this weekend had buy a motherboard and a processor DualCore 2.5Ghz, no more stuttering. thanks alot for your help.

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• How to customize live Ubuntu CD with my own branding?

  - by Ahash

  I would like to create a customized UbuntuOS (Live CD/DVD) for my office and house by installing some additional packages. I have followed this link but it doesn't seems to work. Can anyone provide clear instructions? Customize Packages that I want to install: KDE Desktop Enviornment Thunderbird VLC Player WIne Programme Loader Skype Playmouth Manager Super Boot Manager Synaptic Package Manager Changes that I need: Different default Ubuntu wallpaper Installing KDE Environment Changing Boot (Splash) Screen with my customize theme I want to installing ubuntu With 2 Language, Bangla & English Please Note, I do not prefer Remastersys, manual way will be appreciated.

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• Isometric smooth fog

  - by marcg11

  I'm working on a simple 2d game with direct3d 9. It's a isometric game with diamond tiles and a staggered map. This is what I have: As you se I have some king of fog which is acomplished by having a fog matrix which is true (clear terrain) or false (obscure terran). But the result is very chunky. The fog moves as the player moves by tiles but not by pixels. Basically I check for every tile if there is fog, if so I just change the color of that tile: if(scene->fog[i+mapx][j+mapy] == FOG_NONE) { tile_color = 0x666666FF; } I also would like the fog to be smoother, for that I followed this "tutorial" but I haven't managed to work it it out. http://www.appsizematters.com/2010/07/how-to-implement-a-fog-of-war-part-2-smooth/

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• Building Interactive User Interfaces with Microsoft ASP. ...

  The ASP.NET AJAX UpdatePanel provides a quick and easy way to implement a snappier, AJAX-based user interface in an ASP.NET WebForm. In a nutshell, UpdatePanels allow page developers to refresh selected parts of the page (instead of refreshing the entire page). Typically, an UpdatePanel contains user interface elements that would normally trigger a full page postback - controls like Buttons or DropDownLists that have their <code>AutoPostBack</code> property set to True. Such controls, when placed inside an UpdatePanel, cause a partial page postback to occur. On a partial page postback only the contents of the UpdatePanel are refreshed, avoiding the "flash" of having the entire page reloaded. (For a more in-depth look at the UpdatePanel control, refer back to the

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• How to get scripted programs governing game entities run in parallel with a game loop?

  - by Jim

  I recently discovered Crobot which is (briefly) a game where each player codes a virtual robot in a pseudo-C language. Each robot is then put in an arena where it fights against other robots. A robots' source code has this shape : /* Beginning file robot.r */ main() { while (1) { /* Do whatever you want */ ... move(); ... fire(); } } /* End file robot.r */ You can see that : The code is totally independent from any library/include Some predefined functions are available (move, fire, etc…) The program has its own game loop, and consequently is not called every frame My question is: How to achieve a similar result using scripted languages in collaboration with a C/C++ main program ? I found a possible approach using Python, multi-threading and shared memory, although I am not sure yet that it is possible this way. TCP/IP seems a bit too complicated for this kind of application.

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• Design leaderboard ratings for quiz games

  - by PeterK

  Back in March 2011 i started the following post: How to design a leaderboard? Now my quiz game have been out for approximately a year and sold pretty decently. I am working on to update the game design and is again looking into the leaderboard design to make it better as i am not happy with it. Currently i rate players on number of correct answers, which is not good as it does not consider things like number of games, difficulty levels etc. I also have "extended" stats behind the UITableView (Leaderboard). A player can play based on three levels of difficulty: hard, medium or easy Difficulty levels can be mixed between players in a game Each game can be one to six players, so there can be single games or duels Between 2 and 30 questions per game As i am considering integrating Game Center Leaderboard i need to design a better rating system so i would like to ask for some ideas how to do the rating based on the above. I am thinking about how much a point would be worth and what it includes.

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• Using Linux as guest on vmware and sharing connection with windows vista

  - by mike

  I been trying for weeks with vmwware player, now d/l vmwware work station 7, Have a laptop with one built in modem and a usb modem I bought, It works great switching it over from host to use in ubuntu to connect to the net, now when I use that modem from the host to connect online I have no trouble getting ubuntu to share the internet connection, But tried with NAT bridge host and all to get it to work from ubuntu to share the internet connection to windows vista, the host, I know it should work if it works the other way around, I tried setting up my wlan0 eht0 and eth1 to the correct IP can get both systems to notice each other by name and ip, but cant get them to share the connection from guest to host, I've tried iptables and all as well, Can someone please help me out with this? I am sure It is something something I'm over looking, Thanks in advance

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• Story and news-feed ideas for social network games

  - by arpine

  I am currently working on a educational and fun 2-in-1 game. As I am not a professional, I need advice on story and news-feed. The goal is simple-get richer, the story is about a worker who is trying to get over his/her financial problems and become rich. During the whole gaming process there is a news-feed (every day there are a couple of fresh news about what is going on). The news are fresh and individual so I need to write about 2000 pieces of news for 2 year gaming, maybe more. The problem is that I am not sure whether repetitive news can interest in this game. What can be done to make the news-making process easier but not boring from the point of view of the player?

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• Box2D platformer movement. Are joints a good idea?

  - by Romeo

  So i smashed my brains trying to make my character move. As i wanted later in the game to add explosions and bullets it wasn't a good idea to mess with the velocity and the forces/impulses didn't work as i expected so something stuck in my mind: Is it a good idea to put at his bottom a wheel(circle) which is invisible to the player that will do the movement by rotation? I will attach this to my main body with a revolute joint but i don't really know how to make the main body and wheel body to don't collide one with each other since funny things can happen. What is your oppinion?

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• Extremely Hybrid Game requirements

  - by tugrul büyükisik

  What system specifications would a game need if it was: Total players per planet: ~20000 Total players per team:~1M Total players per map(small volume of space or small surface over a planet): ~2000 Total players: ~10M(world has more players than this amount i think) Two of the players are commanders of opposite quadrants(from HUD of a strategy game). Lots of players use space-crafts as a captain(like 3d fps and rts). Many many players control consoles in those space-crafts as under command of captains.(fps ) Some players are still in stone-age trying to reinvent wheel in some planet. Players design and construct any vehicles they have. With good physics engine Has puzzles inside. Everyone get experience by doing stuff(RPG). Commerce, income or totally different resource-based group(like starcraft) Player classes(primitive: cunning and strong, wrapped: healthy, wealthy) Arcade top-down style firing with ships when people get bored very low chance of miraculous things.(mediclorians, wormholes, bugs) Different game-modes: persistent(living world), resetted periodically(a new chance for noobs), instant(pre-built space + hack&slash) I suspect this would need 128GB ram and 2048 cores.

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• Switching songs - MediaPlayer lags the game

  - by Fibericon

  When the player encounters a boss in the game I'm working on, I want to have the music change. It seems simple enough with the MediaPlayer class to fade out the current song, switch to another, and then fade the new song in. However, at the point where the second song starts, the game freezes for a split second. The songs in question aren't particularly large either - the first song is 1.7mb and the second song is 3.1mb, both mp3 format. This is the code I'm using to do it: protected void switchSong(GameTime gameTime) { if (!bossSongPlaying) { MediaPlayer.Volume -= ((float)gameTime.ElapsedGameTime.TotalSeconds/10); if (MediaPlayer.Volume < 0.05f) { MediaPlayer.Play(bossSong); MediaPlayer.Volume = 1.0f; bossSongPlaying = true; } } } What can I do to eliminate that momentary hang?

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• "Time Control" in a 2d Platformer

  - by Woody Zantzinger

  I am making a 2d platformer where the player can press a button, and restart the level, only their previous character will also run the level at the same time, like they are traveling back in time. I know other games have done this before, and the way I have thought of doing it is to make the game character have a set of actions (Idle, Jumping, Walking Left etc.) and then detect changes in those actions and log them into a list along with the game time. So then when I need the character to run the level again on its own, I can just go through the list changing its actions at the right time. Is this the best way to do it? Does anyone have any experience in this? Thanks.

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• Can these game be fully coded in html5/javascript?

  - by RufioLJ

  I mean the mechanics of the game. Would it be possible? -Pokemon GBA series, rendering the world would be easy, but what about battle mechanics? -MapleStory, after seen dragonbound.net which is an identical copy of Gunbound I would think it's rather possible, but I'm still not sure if javascript can handle all the mechanics of the world. It would be heavy on resources I guess? I'm asking this because I'm really interested in html5 game develop(I really think in a future will destroy flash on game dev ground). I want to have an idea of how far games developed with the html5/javascript technology can go. I got especially inspired by dragonbound. I really think it pushes htmlt/javascript to the limits (game dev).

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• WinTV-HVR-1900 no picture in VLC

  - by nLinked

  I've connected a Hauppauge WinTV-HVR-1900 to my Ubuntu 10.10 PC and used the instructions here to install the firmware and test that it is detected using dmesg. Detection is successful. The WinTV is connected to my TV using component connections. I run this command to enable the component interface: v4l2-ctl -i 1. Then I use cat /dev/video0 test.mpg, and that file is created and plays perfectly with video and sound. However, when I try to play /dev/video0 in VLC Player (and other players), I just get a black screen. I also try the v4l2-ctl -i 1 command before I try it in VLC, but I still get a black screen, and when I use v4l2-ctl -I, it shows it has connection 0 again (Television), so it reverts back to connection 0 instead of connection 1 (component). So I'm a little stuck with getting VLC to get a picture, even though the CAT command works fine. Anything I can try?

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• Flashing task bar(firefox) in lxde panel and ubuntu internal error

  - by arroy_0209

  I have upgraded from ubuntu10.04 to 12.04 and installed lxde. The panel is now customized according to my convenience. The problem is there was a default checked option for "Flash when there is any window requiring attention" in Task bar(window list) and now when I run firefox, at times the concerned bar in the panel window list starts flashing but it is not clear exactly why at that moment firefox requires my attention. Normally this happens after I download some files (pdf files) and keep using firefox. The only solution I have found is to quit firefox and even after that I receive this message "Sorry, ubuntu12.04 has experienced an internal error. If you notice further problems, try restarting the computer." As usual I report the detailed message to ubuntu as suggested and finally restart the computer. So there are two problems, first, exactly why firefox needs my attention at times and second, why immediately after this, ubuntu experiences an internal error. Please suggest what I should do.

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• Enemy Spawning method in a Top-Down Shooter

  - by Chris Waters

  I'm working on a top-down shooter akin to DoDonPachi, Ikaruga, etc. The camera movement through the world is handled automatically with the player able to move inside of the camera's visible region. Along the way, enemies are scripted to spawn at particular points along the path. While this sounds straightforward, I could see two ways to define these points: Camera's position: 'trigger' spawning as the camera passes by the points Time along path: "30 seconds in, spawn 2 enemies" In both cases, the camera-relative positions would be defined as well as the behavior of the enemy. The way I see it, the way you define these points will directly affect how the 'level editor', or what have you, will work. Would there be any benefits of one approach over the other?

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• The New My Oracle Support User Interface (HTML-based)

  - by user793553

  A single source for learning about the latest enhancements to the My Oracle Support User Interface... On January 27, 2012, we launched a new My Oracle Support HTML-based user interface (UI). The new user interface is built using Oracle’s Application Development Framework and is our first step towards providing a single online support portal for our customers and partners; one that all users will transition to in the coming months. Further enhancements to the HTML-based user interface are planned for April 13, 2012. We will transition users of the standard Flash-based interface in the coming months. To help facilitate a smooth transition, we invite you to preview and begin using the new My Oracle Support interface by going to supporthtml.oracle.com and sign in using your Single Sign-on username and password For full information regarding functionality, supported browsers and links to quick and easy videos on how to navigate the new UI, please check out Doc ID 1385682.1 

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• In which directory to write game save files/data?

  - by Klaim

  I need a definite list of directories, one or more per platform, where to put game save files and other game generated data. Either based no the OS developer specification, or because it is common usage if there is no recommandation. Please provide one answer per platform, with different directories. Also, example of how to get the directory location in C++ or C is best, as it's the language you'll have more hard time. Locations: Player's game data (saved games, config). Shared game data (like high-score or config for all computer users). Temporary game data (aka cache directory).

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• Best way to slice up a non rectangular image?

  - by Hoff

  I have the image below and need to create a rollover for each "piece" or arrow in the circle. Because the image isn't rectangular, it boggles how me how I'm going to do this without having badly overlapping pieces. As you can see from the image below, the slices will overlap each other (quite a bit), which will not be good for the rollover. Does anybody have any ideas as to how to accomplish this without resorting to Flash or HTML5? The majority of our site's users use dinosaur browsers that don't support HTML5. Here's the link to the image: http://img812.imageshack.us/img812/3166/wheela.png

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• Lightning whip particle effects

  - by Fibericon

  I'm currently using Mercury Particle Engine for the particle effects in my game, and I'm trying to create a sort of lightning whip - basically a lightning effect bound to a line that curves when the player moves. I know how to use the editor, and I have particle effects working in game. However, I'm completely lost as to where I should start for this specific particle effect. Perhaps if I could find the code for it in a different particle engine, I could convert it, but I can't seem to find that either. What I did find was a lot of tutorials for creating the lines associated with lightning programmatically, which doesn't help in this case because I don't want it to be rigid. Perhaps it would be more like some sort of laser beam with crackling effects around it? I'm running into a wall as far as even beginning to implement this goes.

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