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• Entity Component System, weapon

  - by Heorhiy

  I'm new to game programming and currently trying to understand Entity Component System design by implementing simple 2d game. By ECS I mean design, described here for example In my game I have different kind of weapons: automatic, gun, grenade, etc... Each type of weapon has it's own affect area (gun shots along the straight line and grenade explodes and covers some spherical area) , damage impact, visual effect and bullet amount, delay between shots. So I don't completely understand how to implement weapons. Should weapon be an Entity or it should be a component? And how the player should pick up a weapon, switch between different types of weapons and etc.

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• How do walls affect lighting?

  - by Milkboat

  I have been trying to implement a simple form of lighting in my 2D game. In the screenshot, I don't think it looks very good, kind of just plastered over the top of the map. How would the wall effect how the lighting is displayed? Just looking for tips on how to make my lighting look a bit better. Right now I gave each tile a light value and I change that depending on if there is a light source near by. I don't take in account if there are any objects near by. Screenshot:

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• Will having many timers affect my game performance?

  - by iQue

  I'm making a game for android, and earlier today I was trying to add some cool stuff to my game. The problem is this thing needs like 5 timers. I build my timers like this: timer += deltaTime; if(timer >= 2.0f){ doStuff; timer -= 2.0f; } // this timers gets stuff done every 2 secs Will having to many timers like this, getting checked every frame, screw up my games performance? The effect I wanted to add was a crosshair every 2 sec, then remove it after 2 sec and do a timed animation. So an array of crosshairs dependent on a bunch of timers to be exact. This caused my game to shut down when used, so thats why Im wondering if using that many timers causes my game to flip out.

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• Is there a grey-area with Copyright infringement?

  - by Z.O

  Currently a student, I'm trying to put together a game for iOS. From everywhere I've read, it seems any game's sound and art are apart of their IP and covered under their Copyright. That being said, say I wanted to use the coin sound effect from the original Mario (less than 1s long and used sparsely)... would anyone really care? Having no experience with this, I'm just wondering if cases like this are treated like "Ya you're driving slightly over the speed limit, but nobody cares" or as "you stole that car". Thanks for any insight anyone may be able to provide.

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• EV SSL Certificates - does anyone care?

  - by pygorex1

  Is any one aware of any data or studies from an impartial source that show the impact of EV SSL certificates on customer behavior? I've been unable to find any such studies. If an EV SSL certificate increases sales on a web store front by even a few points, I can see the value. Aside from data targeted at EV SSL it may be possible to guess at customer behavior based on user interaction with regular SSL certificates. Are users even aware of SSL security? Does regular SSL have any proven effect on web store front sales? Note, that I'm not asking about the necessity of good encryption - I'm asking about a potential customer's perception of security & trust.

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• Can't make the Multimedia keys work in LXDE

  - by Uri Herrera

  I've tried to edit the configuration file in ~/.config/openbox/lxde-rc.xml however the changes don't take effect, i still can't use the keys. The LXDE wiki shows that after finding that my keyboard sends the correct standardized keyboard events i should go and edit the file to my liking, the keyboard does send the correct events and the keys are properly identified yet nothing happens. Since LXDE doesn't come with a sound preferences option i have installed xfce4-mixer. I too have a netbook running Lubuntu and it's media keys are working fine, i don't know if what i installed has had something to do here?. I also installed xfce4-volumed volume keys daemon from synaptic but to no avail, still nothing. How can i make the multimedia keys of my keyboard work in LXDE with xfce4-mixer Edit: Here is my lxde-rc.xml file

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• How to write reusable code in node.js

  - by lortabac

  I am trying to understand how to design node.js applications, but it seems there is something I can't grasp about asynchronous programming. Let's say my application needs to access a database. In a synchronous environment I would implement a data access class with a read() method, returning an associative array. In node.js, because code is executed asynchronously, this method can't return a value, so, after execution, it will have to "do" something as a side effect. It will then contain some code which does something else than just reading data. Let's suppose I want to call this method multiple times, each time with a different success callback. Since the callback is included in the method itself, I can't find a clean way to do this without either duplicating the method or specifying all possible callbacks in a long switch statement. What is the proper way to handle this problem? Am I approaching it the wrong way?

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• Xubuntu 12.04: How to get Emacs keybindings?

  - by Marius Hofert

  I work with Xubuntu 12.04 on a MacBook Air. There are various posts about how to use Emacs' keybindings under gnome (see, for example, Enabling Emacs Keybind on Google Chrome, reverting from emacs keybindings in chrome, or http://www.fettesps.com/ubuntu-emacs-keybindings/). I installed gconf-editor and replaced "Greybird" by "Emacs" in desktop - gnome - interface - gtk_theme. This change did not seem to have an effect, though. How can I get Emacs keybindings under Xubuntu? [C-s for "search" and C-y for "paste" in google chrome, for example]

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• APT wedged by kernel version mismatch

  - by Leopd

  Apt is seemingly unable to do anything useful for me, repeatedly giving messages of this form: dpkg: dependency problems prevent configuration of linux-server: linux-server depends on linux-image-server (= 3.2.0.37.44); however: Version of linux-image-server on system is 3.2.0.37.45. linux-server depends on linux-headers-server (= 3.2.0.37.44); however: Version of linux-headers-server on system is 3.2.0.37.45. dpkg: error processing linux-server (--configure): dependency problems - leaving unconfigured This is basically the same problem as I cannot install any package (linux-image-server, linux-server dependencies errors) which got closed Duplicate to an answer that is totally useless for this situation. None of the advice in that very generic answer about dependencies helps. Explicitly: sudo apt-get clean sudo apt-get autoclean sudo apt-get update all have no not effect. While sudo apt-get -f install sudo dpkg --configure -a sudo apt-get -u dist-upgrade sudo apt-get -o Debug::pkgProblemResolver=yes dist-upgrade all give some form of the error message above.

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• How can I break out of ssh when it locks?

  - by Wayne Werner

  Hi, I frequently ssh into my box at home from school, but usually when I change classes and my computer suspends, the pipe will be broken. However, ssh simply locks up - ^c, ^z and ^d have no effect. It's annoying to have to restart my terminal, and even more annoying to have to close and re-create a new screen window. So my question, is there an easy way to make ssh die properly (i.e. when the pipe fails "normally" it will exit with a message about a broken pipe)? Or do I have to figure out what the PID is and manually kill it? Thanks!

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• How to get quality sprite sheet generation with rotations

  - by BenMaddox

  I'm working on a game that uses sprite sheets with rotation for animations. While the effect is pretty good, the quality of the rotations is somewhat lacking. I exported a flash animation to png sequence and then used a C# app to do matrix based rotations (System.Drawing.Drawing2D.Matrix). Unfortunately, there are several places where the image gets clipped. What would you suggest for a way to get high quality rotations from either flash or the exported PNGs? A circle should fit within the same image boundaries. I don't mind a new program that I must write or an existing program I must download/buy.

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• DNS and Wildcard CNAME

  - by Thomas Chapman

  Whenever I attempt to make a record for *.schneiderdonnelly.com.au and CNAME it, I get two errors: You can't mix CNAME/MX records together using the same hostname. Domain root's cannot be CNAME's, however you can web-forward this record to www.schneiderdonnelly.com.au instead for the same effect. I've read it's possible so why can't I make it work? I donated $5 to be a premium member and I've been trying to make it work for yonks. http://i.stack.imgur.com/D9Ui5.jpg This is how I want it to appear. The last record. I am prepared to swap DNS providers as long as they're free.

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• How can I fade something to clear instead of white?

  - by Raven Dreamer

  I've got an XNA game which essentially has "floating combat text": short-lived messages that display for a fraction of a second and then disappear. I've recently added a gradual "fade-away" effect, like so: public void Update() { color.A -= 10; position.X += 3; if (color.A <= 10) isDead = true; } Where color is the Color int the message displays as. This works as expected, however, it fades the messages to white, which is very noticeable on my indigo background. Is there some way to fade it to transparent, rather than white? Lerp-ing towards the background color isn't an option, as there's a possibility there will be something between the text and the background, which would simply be the inverse of the current problem.

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• GLSL Bokeh using Quads and Textures

  - by Notoriousaur

  I'm trying to create a depth of field effect with bokeh sprites in GLSL. Specifically, what i would like to do is, for each pixel: See if the pixel is out of the focal range If it is, draw a quad and apply a texture to provide a bokeh sprite. This kind of implementation is seen in the Unreal Engine and by Matt Pettineo, however, both implementations are in DX11 and I'm using OpenGL. I'm a bit stuck on the drawing a quad and applying a texture bit. Does anyone know how I can do this, or provide any relevant links as to how I can do this? Thanks

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• What package do I need to build a Qt 5 & CMake application?

  - by Kevin Reid

  I'm trying to build sdrangelove, which wants Qt 5 and uses CMake for its build system, on Ubuntu 13.10. What package do I need to install to give it the file it's asking for here? There are a lot of *qt5* packages, and I've tried installing the promising looking ones to no effect. All the discussions I've found either have things working fine or are talking about writing CMake build rules rather than executing them. I don't have a lot of experience with the organization of Debian/Ubuntu packaging. CMake Error at CMakeLists.txt:14 (find_package): By not providing "FindQt5Core.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "Qt5Core", but CMake did not find one. Could not find a package configuration file provided by "Qt5Core" (requested version 5.0) with any of the following names: Qt5CoreConfig.cmake qt5core-config.cmake Add the installation prefix of "Qt5Core" to CMAKE_PREFIX_PATH or set "Qt5Core_DIR" to a directory containing one of the above files. If "Qt5Core" provides a separate development package or SDK, be sure it has been installed.

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• Do immutable objects and DDD go together?

  - by SnOrfus

  Consider a system that uses DDD (as well: any system that uses an ORM). The point of any system realistically, in nearly every use case, will be to manipulate those domain objects. Otherwise there's no real effect or purpose. Modifying an immutable object will cause it to generate a new record after the object is persisted which creates massive bloat in the datasource (unless you delete previous records after modifications). I can see the benefit of using immutable objects, but in this sense, I can't ever see a useful case for using immutable objects. Is this wrong?

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• Add autorandr before kdm starts

  - by Serge Tarkovski

  I want to add autorandr before kdm starts. Autorandr works well within KDE, however, in kdm I still have ugly 1024x768 resolution when my external monitor is connected. I tried adding autorandr --change to /etc/kde4/kdm/Xsetup: #! /bin/sh # Xsetup - run as root before the login dialog appears #xconsole -geometry 480x130-0-0 -notify -verbose -fn fixed -exitOnFail -file /dev/xconsole & /sbin/initctl -q emit login-session-start DISPLAY_MANAGER=kdm /usr/local/bin/autorandr --change >> /tmp/autorandr echo "Xsetup finished" >> /tmp/xsetup-finished A debug message in /tmp/xsetup-finished appears correctly. /tmp/autorandr is empty (so it seems autorandr runs without errors). I also tried to move autorandr --change line before /sbin/initctl -q emit login-session-start DISPLAY_MANAGER=kdm with no effect. P.S. Of course, autorandr profiles I created under KDE session, are in my home folder, but Xsetup script runs under root, so I created a symlink from my ~/.autorandr to /root/.autorandr.

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• 2D Planet Gravity

  - by baked

  I'm trying to make a simple game where a spaceship is launched and then its path is effected by the gravity of planets. Similar to this game: http://sciencenetlinks.com/interactives/gravity.html I wish to know how to replicate the effect the planets have on the spaceship in this game so a spaceship can 'loop' around a planet to change direction. I have managed to achieve some bogus results where the spaceship loops in a huge ellipse around the planet or is only slightly affected by the gravity of a planet using Vectors. Thanks in advance. p.s I have plenty of coding experience just none to do with game dev.

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• Putting (WordPress) tags in <footer> tag, good for SEO or not?

  - by BlackEagle

  I am using tags for my posts on my WordPress site. The content of my post is set in <article> tags, which is fine and now, I want to put the author link and tags in a <footer> tag, but I don't know if this is good for SEO reasons. I know that Googlebots are putting less weight if they see links in a footer, but will this effect my tag pages? Is there any harm? I would love to read a good explanation on this.

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• Install Ubuntu 13.10 in dual boot with Windows 8.1

  - by Xaxt

  I have a laptop with installed Windows 8.1 x64. I want to intstall Ubuntu 13.10 (x64 of cause) in dual boot with it. I've made bootable USB stick (using unetbootin) with Ubuntu and tried to boot with it. It boots fine, and allows me to choose language and asks whether I want to install Ubuntu or just boot it. But if I select any ot these options, it shows black screen and hangs. I've been waiting about 15 minutes for it, but nothing happened. Light of USB stick indicates that my laptop was not trying to read from it that time. I switched off EFI in BIOS, switched AHCI/SATA modes, burned ISO image to DVD and still same effect. This topic can be called a duplicated, but I have't find what it duplicates. In other topics people asked what will happen if they update Windows 8 to 8.1 having already dual boot and I have installed Windows 8.1 and want to install Ubuntu alongside with it Did I miss something?

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• Unity3D: How To Smoothly Switch From One Camera To Another

  - by www.Sillitoy.com

  The Question is basically self explanatory. I have a scene with many cameras and I'd like to smoothly switch from one to another. I am not looking for a cross fade effect but more to a camera moving and rotating the view in order to reach the next camera point of view and so on. To this end I have tried the following code: firstCamera.transform.position.x = Mathf.Lerp(firstCamera.transform.position.x, nextCamer.transform.position.x,Time.deltaTime*smooth); firstCamera.transform.position.y = Mathf.Lerp(firstCamera.transform.position.y, nextCamera.transform.position.y,Time.deltaTime*smooth); firstCamera.transform.position.z = Mathf.Lerp(firstCamera.transform.position.z, nextCamera.transform.position.z,Time.deltaTime*smooth); firstCamera.transform.rotation.x = Mathf.Lerp(firstCamera.transform.rotation.x, nextCamera.transform.rotation.x,Time.deltaTime*smooth); firstCamera.transform.rotation.z = Mathf.Lerp(firstCamera.transform.rotation.z, nextCamera.transform.rotation.z,Time.deltaTime*smooth); firstCamera.transform.rotation.y = Mathf.Lerp(firstCamera.transform.rotation.y, nextCamera.transform.rotation.y,Time.deltaTime*smooth); But the result is actually not that good.

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• In SEO & SEM terms, use of a international domain vs a local domain

  - by Paddy

  In terms of SEO & SEM if I have a .com and a .co.uk. Would it be better to use the .com and park the .co.uk, If I am selling the product locally (in the uk) and later moving out into the international market? Will I struggle more to compete locally with regards to local searches and Google Adwords, if I make the .com as the primary domain? Does the parking of the .co.uk or the .com effect the relevance of a web domains search locally and internationally?

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• General visual effects to meshes/entities

  - by Pacha

  I am trying to add some visual effects to some entities, meshes, or whatever you want to call them as they are looking pretty dull in my game right now. What I want to achieve is this: http://youtu.be/zox8935PLw0?t=36s (the "texture" gets disintegrated and then goes back to normal, covering the whole mesh.) Also I would like to know what is the best way to add effects like the one in the video to my game (for example, thunder effects, shattering, etc.) I know that I can do some things with shaders, but I haven't learned them too well and I am still in a beginner level. I am using Ogre3D, and GLSL for shaders. Thanks! Note: this is a screen-shot of my game, I want to apply the effect in the video to my main character):

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• Address Is Approximate: A Brilliant Stop Motion and Street View Mashup [Video]

  - by Jason Fitzpatrick

  In this moving and brilliantly executed stop motion film, a small toy takes a voyage across the world without leaving the desk he lives on. Address is Approximate, a short stop motion film by Tom Jenkins, is a moving little film that combines Google Street View, stop motion, a collection of small desktop toys, and very clever use of office objects to great effect. [via GeekDad] How to See What Web Sites Your Computer is Secretly Connecting To HTG Explains: When Do You Need to Update Your Drivers? How to Make the Kindle Fire Silk Browser *Actually* Fast!

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• Sounds to describe the weather?

  - by Matthew

  I'm trying to think of sounds that will help convey the time of day and weather condition. I'm not even sure of all the weather conditions I would consider, and some are obvious. Like if it's raining, the sound of rain. But then I'm thinking, what about for a calm day? If it's morning time, I could do birds chirping or something. Night time could be an owl or something. What are some good combinations of sounds/weather/time to have a good effect?

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