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• Friday Fun: Archers Oath

  - by Asian Angel

  This week’s game puts your archery skills to the test as you race against time to save innocent captives from the hangman’s noose. Are you good enough to show Robin Hood a thing or two about using a bow or will you be shot down in shame? How to Stress Test the Hard Drives in Your PC or Server How To Customize Your Android Lock Screen with WidgetLocker The Best Free Portable Apps for Your Flash Drive Toolkit

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• Rotation angle based on touch move

  - by Siddharth

  I want to rotate my stick based on the movement of the touch on the screen. From my calculation I did not able to find correct angle in degree. So please provide guidance, my code snippet for that are below. if (pSceneTouchEvent.isActionMove()) { pValueX = pSceneTouchEvent.getX(); pValueY = CAMERA_HEIGHT - pSceneTouchEvent.getY(); rotationAngle = (float) Math.atan2(pValueX, pValueY); stick.setRotation((float) MathUtils.radToDeg(rotationAngle)); }

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• What actions does Ubuntu trigger when battery is low?

  - by blueyed

  When the battery is low, the screen gets dimmed after a few seconds already. This appears to be some special power-saving mode, and might be related to the time in org.gnome.settings-daemon.plugins.power.time-low (1200 seconds (20 minutes) the default). While this seems to get triggered by gnome-settings-daemon, I wonder what else Ubuntu does when this happens (e.g. via DBus listeners), or other event listeners that look for a "low battery" state. It seems like something in this regard causes Ubuntu / X / the system to behave more sluggish afterwards (when the laptop is on AC again), and I would like to look into what might be causing this. I could not find anything related via dconf-editor, e.g. in org.gnome.settings-daemon.plugins.power. It appears to get setup via idle_configure in plugins/power/gsd-power-manager.c, but it's probably something more related to something that listens on the DBus interface, which gets notified via e.g.: if (!g_dbus_connection_emit_signal (manager->priv->connection, NULL, GSD_POWER_DBUS_PATH, "org.freedesktop.DBus.Properties", "PropertiesChanged", props_changed, &error)) I could imagine that some "power saving" property gets set, but not unset when AC is available anymore and/or the battery is not low anymore. I have looked at the CPU governor setting (/sys/devices/system/cpu/cpu*/cpufreq/scaling_governor), but it was ondemand. I am using gnome-settings-daemon with awesomeWM on Ubuntu 14.04. gnome-settings-daemon=3.8.6.1-0ubuntu11.1 I've also compared gsd's plugins/power/gsd-power-manager.c with the one from Debian's gnome-settings-daemon-3.12.1, but could not find anything obvious that might have been fixed/changed in this regard. I have managed to trigger the gnome-power-manager's gnome-settings plugin (which dims the screen etc), by patching upower and use it after killing the system's upower daemon. (note that it's probably only energy that is being used by gpm to calculate it by itself). It does not make the system become sluggish.. OTOH I have not heard the speaker's beeping, which might come from the BIOS, which might be involved here, too - or other programs using the kernel's interface on /sys/class/power_supply/BAT0/. --- src/linux/up-device-supply.c.orig 2014-06-07 16:48:32.735920661 +0200 +++ src/linux/up-device-supply.c 2014-06-07 16:48:39.391920525 +0200 @@ -821,6 +821,9 @@ supply->priv->energy_old_first = 0; } + percentage = 3.1f; + time_to_empty = 3*60; + energy = 5; g_object_set (device, "energy", energy, "energy-full", energy_full,

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• HP Photosmart Plus Review

  HP's new $150 inkjet puts the emphasis on convenience with an extra-friendly touch-screen interface and separate letter and photo paper trays, plus output quality good enough to satisfy business users.

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• After Re-opening Laptop, Programs Blink with Each Keystroke, Ubuntu 12.04, Dell Latitude D620

  - by Calhan

  I'm running Ubuntu version 12.04 on Dell D620 laptop and have been for months. Everything has been working fine until a week ago, when suddenly every time I close the laptop and open it again, the program in use blinks each time I make a keystroke. Only the program blinks, not the whole screen. Rebooting solves the issue until I close the lid again. I have installed all the updates recommended in the package manager. Clues?

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• Power manager keeps shutting down the display

  - by david25

  I'm probably missing something here. I'm using the default Ubuntu power manger, I set it up like this: On AC: no screen dimming when idle, never put computer to sleep, never put display to sleep. On battery: I kept the default settings. Still, Ubuntu does whatever it likes, and after 15 min it puts the display to sleep. Does anyone have the same problem and found a way to solve it? I'm using an Eee PC with Ubuntu 10.10 Desktop.

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• Ubuntu 12.04 + AMD Radeon driver 12.8 problem

  - by wpinacz

  I have a Lenovo G570 laptop with AMD Radeon 6370M GPU. I wanted to install new 12.8 driver from AMD but with no success, after install and reboot, I got a screen with reconfigure graphics driver and it won't work. If I install 12.6 driver it works but I cannot switch to my integrated Intel GPU, only discrete (AMD) GPU is working. Please help with my problem (installing 12.8 driver or switching GPU under 12.6 driver).

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• How to See Your Estimated Data Usage in Windows 8

  - by Taylor Gibb

  Although you can use metered connections to get the most of your bandwidth in Windows 8, at times you may want to know how much data you have used for a single browsing session. Here’s how to do it. Why Your Android Phone Isn’t Getting Operating System Updates and What You Can Do About It How To Delete, Move, or Rename Locked Files in Windows HTG Explains: Why Screen Savers Are No Longer Necessary

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• Gnome Shell has turned into Gnome Classic (no effects) after installing fglrx.

  - by Chintan Parikh

  For some reason, I can't get Gnome Shell working after installing fglrx. When I select Gnome Shell in the profile, it just goes to Gnome Classic (No effects). A few other issues: GDM has turned into something that looks a lot more fancy (not sure what it is) Selecting System Default in the profile section just gives me a blank screen (not Unity) When I drag a window around I get laggy windows-esque shadows Oh and I'm on Ubuntu 12.10 with an AMD Radeon HD 6540 G2 graphics card

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• How do I make Ubuntu aware of plugging in and out a second monitor ?

  - by Agmenor

  Usually, when I plug in a second monitor and I want my computer to be aware of it, I have to go to 'System' - 'Preferences' - 'Monitors'. Then, without clicking anywhere, my desktop knows it has to adapt itself (by cloning the screen or broadening the virtual desktop). How can I make this happen automatically ? For more information, my computer is an Acer Extensa 5636 notebook plugged to a Compaq CQ1859s monitor, using a VGA cable.

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• Double Buffering in Panda3D (C++)

  - by jsvcycling

  How would I go about using Double Buffering (to create a loading screen) in Panda3D using C++? I've searched Google and found some forums that talk about the concept of swapping buffers, but I haven't seen any that show any type of source code (specifically Panda3D/C++). I'd like to try and stay away from using pure OpenGL code and work it through Panda3D, but if I have no other choice, then I'll have to go with OpenGL coding.

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• How Search Engines Work

  The knowing about how the different search engines are working is necessary for your SEO efforts, weather you do it your self or hire a SEO consultant to it. You should know how the search engines find WebPages, and their well known criteria for determining the ranking that will be displayed in the search results screen.

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• Nvidia 8600M GT driver fail Ubuntu 13.10

  - by Dániel Pap

  After I setup Ubuntu 13.10 I would like to replace the default Nouveaou driver to an officival Nvidia driver because every effects is more slowly with nouveou. But when I clicked on each Nvidia driver version in addictional drivers after the reboot I got black screen. When I press Ctrl Alt F1 and write startX I got a long error message with this line ERROR: I could not insert ' actually nvidia version' No such device

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• How can I use my keyboard as a mouse?

  - by Michael Durrant

  I'm using my keyboard more and more these days for basic command line stuff, vim editing, alt-tab window switching and the like. Q) How can I use my number pad keys to move the cursor around on the screen without using the mouse? I looked to try and install btnx as mentioned by others but it doesn't seem to exist anymore as an available package I also tried shift-numlock as mentioned by another but that didn't work either (just turns numlock on/off).

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• How to Create Network File Shares with No Passwords in Windows 8

  - by Taylor Gibb

  We have all had to connect to a network share at some point only to have the authentication dialog pop up. There are many ways around it, for example mapping a network drive, but if you have a lot of users connecting to copy some files you may want to disable the password dialog instead of distributing your password. How To Delete, Move, or Rename Locked Files in Windows HTG Explains: Why Screen Savers Are No Longer Necessary 6 Ways Windows 8 Is More Secure Than Windows 7

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• Developing Conditionally Driven Event Handlers in ASP.NET 3.5

  What is a conditionally-driven event handler and why would you want to use one Basically such an event handler will perform its assigned action -- such as displaying text on the screen -- if and only if a certain specified condition is met. As you might imagine such event handlers have a range of uses. This article will walk you through some examples in ASP.NET 3.5.... Cloud Servers in Demand - GoGrid Start Small and Grow with Your Business. $0.10/hour

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• Ubuntu take hours to start!

  - by y2b4u3d

  I have installed Ubuntu 11.10 as my only OS after I formatted Windows XP but after the installation finished it took four hours to boot and start working it just was stuck in that purple screen with nothing on it!!! But if I unplug the power and start my PC again it start after bring me the grub option... What should I do to make em start just as easy as any OS do! my RAM is 1 GB, 80GB HDD, ASROCK.

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• Gnome-Shell Logout

  - by Nerdfest

  The latest version of Gnome-shell starts to display (the top bar appears briefly) but I then get logged out. This happens when I start it with "gnome-shell --replace". Any idea how to make it behave properly? Laptop is a MSI U21, an0d I run with a 'nomodeset' startup option. Without this option the screen clears to just wallpaper and stays that way. Gnome-shell v2.31.5 Kernel 2.6.35-27 (& 28 as well)

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• need help installing NVIDIA 6600gt drivers

  - by user11852

  I have downloaded the drivers from NVIDIA ----NVIDIA-Linux-x86-260.19.36.run----It's for my Nvidia 6600gt APG 8x-- I'm using Ubuntu10.10. How do I get them installed, is there a way that my "additional drivers" program could download it somehow. I have been using Linux for 10 days, so my knowledge is limited. The drivers that are in my "additional drivers" program don't work. Freezes and black screen.

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• Glm Vector Transformations [duplicate]

  - by Reanimation

  This question already has an answer here: Car-like Physics - Basic Maths to Simulate Steering 2 answers I have a cube rendered on the screen which represents a car (or similar). Using Projection/Model matrices and Glm I am able to move it back and fourth along the axes and rotate it left or right. I'm having trouble with the vector mathematics to make the cube move forwards no matter which direction it's current orientation is. (ie. if I would like, if it's rotated right 30degrees, when it's move forwards, it travels along the 30degree angle on a new axes). I hope I've explained that correctly. This is what I've managed to do so far in terms of using glm to move the cube: glm::vec3 vel; //velocity vector void renderMovingCube(){ glUseProgram(movingCubeShader.handle()); GLuint matrixLoc4MovingCube = glGetUniformLocation(movingCubeShader.handle(), "ProjectionMatrix"); glUniformMatrix4fv(matrixLoc4MovingCube, 1, GL_FALSE, &ProjectionMatrix[0][0]); glm::mat4 viewMatrixMovingCube; viewMatrixMovingCube = glm::lookAt(camOrigin, camLookingAt, camNormalXYZ); vel.x = cos(rotX); vel.y=sin(rotX); vel*=moveCube; //move cube ModelViewMatrix = glm::translate(viewMatrixMovingCube,globalPos*vel); //bring ground and cube to bottom of screen ModelViewMatrix = glm::translate(ModelViewMatrix, glm::vec3(0,-48,0)); ModelViewMatrix = glm::rotate(ModelViewMatrix, rotX, glm::vec3(0,1,0)); //manually turn glUniformMatrix4fv(glGetUniformLocation(movingCubeShader.handle(), "ModelViewMatrix"), 1, GL_FALSE, &ModelViewMatrix[0][0]); //pass matrix to shader movingCube.render(); //draw glUseProgram(0); } keyboard input: void keyboard() { char BACKWARD = keys['S']; char FORWARD = keys['W']; char ROT_LEFT = keys['A']; char ROT_RIGHT = keys['D']; if (FORWARD) //W - move forwards { globalPos += vel; //globalPos.z -= moveCube; BACKWARD = false; } if (BACKWARD)//S - move backwards { globalPos.z += moveCube; FORWARD = false; } if (ROT_LEFT)//A - turn left { rotX +=0.01f; ROT_LEFT = false; } if (ROT_RIGHT)//D - turn right { rotX -=0.01f; ROT_RIGHT = false; } Where am I going wrong with my vectors? I would like change the direction of the cube (which it does) but then move forwards in that direction.

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• Are these non-standard applications of rendering practical in games?

  - by maul

  I've recently got into 3D and I came up with a few different "tricky" rendering techniques. Unfortunately I don't have the time to work on this myself, but I'd like to know if these are known methods and if they can be used in practice. Hybrid rendering Now I know that ray-tracing is still not fast enough for real-time rendering, at least on home computers. I also know that hybrid rendering (a combination of rasterization and ray-tracing) is a well known theory. However I had the following idea: one could separate a scene into "important" and "not important" objects. First you render the "not important" objects using traditional rasterization. In this pass you also render the "important" objects using a special shader that simply marks these parts on the image using a special color, or some stencil/depth buffer trickery. Then in the second pass you read back the results of the first pass and start ray tracing, but only from the pixels that were marked by the "important" object's shader. This would allow you to only ray-trace exactly what you need to. Could this be fast enough for real-time effects? Rendered physics I'm specifically talking about bullet physics - intersection of a very small object (point/bullet) that travels across a straight line with other, relatively slow-moving, fairly constant objects. More specifically: hit detection. My idea is that you could render the scene from the point of view of the gun (or the bullet). Every object in the scene would draw a different color. You only need to render a 1x1 pixel window - the center of the screen (again, from the gun's point of view). Then you simply check that central pixel and the color tells you what you hit. This is pixel-perfect hit detection based on the graphical representation of objects, which is not common in games. Afaik traditional OpenGL "picking" is a similar method. This could be extended in a few ways: For larger (non-bullet) objects you render a larger portion of the screen. If you put a special-colored plane in the middle of the scene (exactly where the bullet will be after the current frame) you get a method that works as the traditional slow-moving iterative physics test as well. You could simulate objects that the bullet can pass through (with decreased velocity) using alpha blending or some similar trick. So are these techniques in use anywhere, and/or are they practical at all?

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• Knowing the Search Engine Process to Improve SEO

  In order to begin your Search Engine Optimization you must first know how search engines work, whether or not you hire an SEO Consultant. It's important to know what you are trying to attract, as well as how search engines find their pages and determine their rating. There are several steps that are part of a search engines process until they get the results pop up on a searchers screen.

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• Best way to solve tile drawing in 2D side scroller?

  - by TheCompBoy

  What i still can't figure out is which would be the more sane way / easier and faster way to draw the map on the screen.. I mean i will use many tiles for my maps in my side scroller.. But problem is should i make the maps in whole images like one .png file for each map (Example) or should i draw the tiles by code like a for loop in c++.. Which way is most recomended or where can i read about which way is the best.

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• HowTo Enable jBullet DebugMode

  - by Kenneth Bray

  I would like to render the physics world of jBullet to debug some issues in my game, and I am not finding too much on enabling the debugDraw method of jBullet. Do I need to write my own debugDraw method, or is there an easier way to draw the physics models to the screen? If there is already a built in method I would prefer to use that, otherwise I guess I will start making my own functions to handle this.

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• Blending effect on textures

  - by joecks

  Hi i am trying to build screen animation like flickering, interlace, color separation similar to old style malfunctioning Amiga screens. The intended effects are shown in this video. I am using libgdx and I already discovered the universal tween engine, which helps a lot to build transitional animations, but how should I approach those blending effects, any suggestions? I will specify my question once I learned more about libgdx, but maybe you could give me some hints already. Thanks!

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