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• Box2d world width and height ratio with screen width and height

  - by Sujith

  I have view, for example GameView which extends SurfaceView . I have integrated Box2D physics in GameView. I have two widths , GameView width, height and Box2D physics world width ,height. I need to get the position of box2d world with the GameView co-ordinates. For example, Total width of screen = 240 Total height of screen = 320 Screen points needed to be mapped onto box2d co-ordinates (x,y) = 127, 139 For this i need to get the max width and height of the Box2d physics world. Is there is any way to get the max width and height of Box2d world. or Can i limit the width and height of box2d world within the screen resolution.

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• How to perform efficient 2D picking in HTML5?

  - by jSepia

  I'm currently using an R-Tree for both picking and collision testing. Each entity on screen has a bounding box for collisions and a separate one for picking. Since entities may change position very frequently, both trees must be updated/reordered once per frame. While this is very efficient for collisions, because the tree is used in hundreds of collision queries every frame, I'm finding it too costly for picking, because it only gets queried when the user clicks, thus leading to a lot of wasted tree updates. What would be a more efficient way to implement picking without as much overhead?

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• how can i get rotation vector from matrix4x4 in xna?

  - by mr.Smyle

  i want to get rotation vector from matrix to realize some parent-children system for models. Matrix bonePos = link.Bone.Transform * World; Matrix m = Matrix.CreateTranslation(link.Offset) * Matrix.CreateScale(link.gameObj.Scale.X, link.gameObj.Scale.Y, link.gameObj.Scale.Z) * Matrix.CreateFromYawPitchRoll(MathHelper.ToRadians(link.gameObj.Rotation.Y), MathHelper.ToRadians(link.gameObj.Rotation.X), MathHelper.ToRadians(link.gameObj.Rotation.Z)) //need rotation vector from bone matrix here (now it's global model rotation vector) * Matrix.CreateFromYawPitchRoll(MathHelper.ToRadians(Rotation.Y), MathHelper.ToRadians(Rotation.X), MathHelper.ToRadians(Rotation.Z)) * Matrix.CreateTranslation(bonePos.Translation); link.gameObj.World = m; where : link - struct with children model settings, like position, rotation etc. And link.Bone - Parent Bone

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• Doing practice jobsearch/technical interviews?

  - by Beekguk

  I graduated college last year & I've never gone through the interview process - my current programming position evolved out of projects I did in school, but in a few months I'm making a clean break and moving across the country so I'm going to have to face a "grown-up" jobsearch. I'm kind of scared of technical interviews - I think I'm pretty good at my job and my hobby programming projects ... but what if it turns out I'm part of that group that thinks they're qualified, but really just cause despair at the state of education in the hearts of interviewers? So, I'm thinking of doing a "practice" job hunt in my current city to get an idea of what it's like and what kind of experience/expertise employers are really looking for. Is this a dick move ethically (applying to/interviewing for jobs I can't take)? If so, is there another good way to prepare for technical interviews, especially those little trick puzzle-type questions?

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• What Is The Relationship Between Software Architect and Team Member

  - by Steve Peng

  I work for a small company which has less than 100 persons. Several months ago, this company offered me position of SA and I accepted. There are three teams in this company, and I work for one of them. This is the first time I work as a SA. During the past months, I find I don't have any power of management, I even can't let the team member do things (coding-related) in the way which is correct and more efficient. The team members argue with me on very very basic technical questions and I have to explain to them again and again. Though some members did take my advice, other members stubbornly program in their way which frequently proved wrong finally. Recently I feel a little tired and confused. I wonder what is correct relationship between a Software Architect and team members including the team leader? Besides, is software architect also leaded by the Team Leader?

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• How to modify VBO data

  - by Romeo

  I am learning LWJGL so i can start working on my game. In order to learn LWJGL I got the idea to implement the map builder so I can get comfortable with graphics programming. Now, for the map creation tool I need to draw new elements or draw the old one's with different coordinates. Let me explain this: My game will be a 2D scroller. The map will be consisting of multiple rectangles ( 2 strip triangles). When I click my left-mouse button i want to start the rectangle and when I release it I want to stop the rectangle bottom-right at that position. As I want to use VBOs I want to know how to modify data inside the VBO based on user input. Should i have a copy of a vertex array and then add the whole array to the VBO at each user input? How is usually implemented the VBO update?

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• Interpolating between two networked states?

  - by Vaughan Hilts

  I have many entities on the client side that are simulated (their velocities are added to their positions on a per frame basis) and I let them dead reckon themselves. They send updates about where they were last seen and their velocity changes. This works great and other players see this work find. However, after a while these players begin to desync after some time. This is because of latency. I'd like to know how I can interpolate between states so they appear to be in the correct position. I know where the player was LAST seen and their current velocity but interpolating to the last seen state causes the player to actually move -backwards-. I could not use velocity at all for other clients and simply 'lerp' them towards the appropriate direction but I feel this would cause jaggy movement. What are the alternatives?

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• Yahoo arrêtera le service Yahoo Publisher Network le 30 Avril : AdSense ternit-il le marché avec sa

  Yahoo arrêtera le service Yahoo Publisher Network le 30 Avril : AdSense ternit-il le développement de ses concurrents avec sa position de leader ? [IMG]http://www.livesphere.fr/images/dvp/ypn-yahoo-publisher-network.png[/IMG] Yahoo a annoncé officiellement l'arrêt de ses services de rémunération publicitaire pour la fin avril. Le service de Yahoo n'avait pas connu un grand succès et les évolutions de la plateforme n'ont connu que peu de mises à jour et est donc reste en version Beta depuis sa mise en ligne. Ainsi, la firme recommande à leur client de se tourner vers un partenaire du nom de Chitika, pour ceux souhaitant continuer leur rémunération publicitaire. Aucune...

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• Which game logic should run when doing prediction for PNP state updates

  - by spaceOwl

  We are writing a multiplayer game, where each game client (player) is responsible for sending state updates regarding its "owned" objects to other players. Each message that arrives to other (remote) clients is processed as such: Figure out when the message was sent. Create a diff between NOW and that time. Run game specific logic to bring the received state to "current" time. I am wondering which sort of logic should execute as part of step #3 ? Our game is composed of a physical update (position, speed, acceleration, etc) and many other components that can update an object's state and occur regularly (locally). There's a trade off here - Getting the new state quickly or remaining "faithful" to the true state representation and executing the whole thing to predict the "true" state when receiving state updates from remote clients. Which one is recommended to be used? and why?

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• Breaking into database administration

  - by user603794

  Hello to all, I am brand new on this site and look forward to interacting with each of you. I am graduating in June with my Bachelors Degree in Computer Information Systems with hopes of become a DBA in the future. I am currently taking a Database class now and studying SQL Server/T-SQL on the side. My experience in IT is limited to managing an Access database at my last employer for two years. What are the chances of landing a junior DBA position after I graduate?

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• How do I create a curved line or filled circle or generally a circle using C++/SDL?

  - by NoobScratcher

  Hello I've been trying for ages to make a pixel circle using the putpixel function provided by SDL main website here is that function : void putpixel(int x,int y , int color , SDL_Surface* surface) { unsigned int *ptr = static_cast <unsigned int *> (surface->pixels); int offset = y * (surface->pitch/sizeof(unsigned int)); ptr[offset + x] = color; } and my question is how do I curve a line or create an circle arc of pixels or any other curved shape then a rectangle or singular pixel or line. for example here are some pictures filled pixel circle below enter link description here now my idea was too change the x and y value of the pixel position using + and - to create the curves but in practice didn't provide the correct results what my results are in this is to be able to create a circle that is made out of pixels only nothing else. thank you for anyone who takes the time to read this question thanks! :D

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• Website inheritance of ownership question

  - by Adrian Denham

  I paid for a web site for my motel business, then due to my landlord actions I was placed in a position to file for bankrupcy. I asked my IT manager and web developer to close down the web site for the business. He has since then sold my web site to the new owners. I took all the photos myself and I am in at least 4 of the photos on the site. There are no changes to the site as I left it and it now states that it is under the copyright on the new owners? I am not sure what I should do as this happen 10 months ago and I have just found this out. Thank you for your help, I am in Australia.

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• Can someone explain how this IOS Pan Gesture Recognition works? [on hold]

  - by user79894

  It is ios app using Pan Gesture Recognizer It works great, but I didn't get it. I wanna do some changes if the dragged UIView reaches a specific position it would call another method. Any comments are appreciated. - (IBAction)handlePan1:(UIPanGestureRecognizer *)recognizer { CGPoint translation = [recognizer translationInView:self.view]; recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, recognizer.view.center.y + translation.y); [recognizer setTranslation:CGPointMake(0, 0) inView:self.view]; /* [x1 setText:[NSString stringWithFormat: @"%.2f", recognizer.view.center.x]]; [y1 setText:[NSString stringWithFormat: @"%.2f", recognizer.view.center.y]]; [x2 setText:[NSString stringWithFormat: @"%.2f", translation.x]]; [y2 setText:[NSString stringWithFormat: @"%.2f", translation.y]];*/ }

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• List of freely available SEO tools (software) for keyword rank checking? [closed]

  - by Craig

  Possible Duplicate: can anyone reccommend a Google SERP tracker? Requirements: Analysis of site positions on the list of keywords in different search engines; Track keyword positions on search engines. I want see if my keyword rankings have moved up or down; Creating reports. I use Excel + Rank Checker addon for Firefox, to analyze the position of the site in search engines for my keyword list. Are there any tools which tested and working properly. Thanks.

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• Unity3D problem. Bullets fall down instead of flying like they should

  - by user2342080

  I used this tutorial as a reference. http://www.youtube.com/watch?v=3L8eaoyZ0Go My problem is that whenever I play the game, EVERYTHING works but the bullets. It just falls down instead of flying forward. This is the flash version of the game: http://v1k.me/swf/ Can some one help me out? Should I upload the project? This is my "Shoot.js": public var bulletPrefab : Transform; public var bulletSpeed : float = 20; function Update() { if(Input.GetMouseButton(0)) { if(bulletPrefab || bulletSpeed) { var bulletCreate = Instantiate(bulletPrefab, GameObject.Find("SpawnPoint").transform.position, Quaternion.identity); bulletCreate.rigidbody.AddForce(transform.forward * bulletSpeed); } } }

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• HTML background-size:cover with floating objects

  - by Mikhail

  I have a trivial page with body having an image background, with background-size:cover. I set html { height:100% } to fill up the entire page regardless of the content amount. Up to this point everything worked as expected. I've added a div and set position:absolute; right:0; width:200px; This, again, worked as expected, until I added content. When this div is populated so much that the contents take up more space than the height of the page, the scroll bar appears. Scrolling down reveals that the background image does not actually cover the entire page. This is due to the fact that my div is taller than 100% of the HTML height. How can I address this?

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• time issue in render libgdx [duplicate]

  - by jaysingh

  This question is an exact duplicate of: time issue in render libgdx [duplicate] pls. help how to implement this loop in render method next_game_tick and GetTickCount(); always contain same time value. so position never updated @Override public void render() { float deltaTime = Gdx.graphics.getDeltaTime(); Update(deltaTime); Render(deltaTime); } const int TICKS_PER_SECOND = 50; const int SKIP_TICKS = 1000 / TICKS_PER_SECOND; const int MAX_FRAMESKIP = 10; DWORD next_game_tick = GetTickCount(); int loops; bool game_is_running = true; while( game_is_running ) { loops = 0; while( GetTickCount() > next_game_tick && loops < MAX_FRAMESKIP) { update_game(); next_game_tick += SKIP_TICKS; loops++; } display_game(); }

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• time issue in render libgdx [duplicate]

  - by jaysingh

  This question is an exact duplicate of: deWitters Game loop in libgdx(Android) pls. help how to implement this loop in render method next_game_tick and GetTickCount(); always contain same time value so player position not updated. @Override public void render() { float deltaTime = Gdx.graphics.getDeltaTime(); Update(deltaTime); Render(deltaTime); } const int TICKS_PER_SECOND = 50; const int SKIP_TICKS = 1000 / TICKS_PER_SECOND; const int MAX_FRAMESKIP = 10; DWORD next_game_tick = GetTickCount(); int loops; bool game_is_running = true; while( game_is_running ) { loops = 0; while( GetTickCount() > next_game_tick && loops < MAX_FRAMESKIP) { update_game(); next_game_tick += SKIP_TICKS; loops++; } display_game(); }

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• Legislative Alert - Payroll for North America

  - by Carolyn Cozart

  We have a Legislative Alert for our customers using PeopleSoft Payroll for North America.   The IRS has made some changes to the FUTA reporting for the tax year 2011.  The IRS requires that all employers complete the 940 Schedule A form when completing the Tax Form 940.  On the Schedule A employers must indicate every state in which you were required to pay state unemployment tax during the year (even if that state's credit reduction rate was zero).  For states with a credit reduction rate greater than zero you must enter the FUTA taxable wages paid in that state then multiply it by the credit reduction rate to report the credit reduction amount for that state.  Please go to Document ID 1371681.1 to obtain additional information on this regulation along with Oracle/PeopleSoft position on this new requirement.

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• Vermont IT Jobs: Sr. Security Analyst in Montpelier

  Senior Security Analyst Summary This position is responsible for advancing the Information Systems program within the company by assisting the Chief Information Security Officer (CISO) to plan, develop, and monitor administrative, physical, and technical safeguards for the companys Information Assets. Key Responsibilities Under Direction of CISO, establish  and maintain company-wide information security policies, standards and procedures Manage the Information Security Program Office...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• My page no longer shows up in Google's results for a keyword

  - by user6456

  I have a small website about a commercial product, with a description and tutorial. 2 days ago it was in position 11th in Google search results, without any kind of SEO optimization on my part. Today it's gone. Totally gone - not even in the first 200 results. It's still very high in bing.com and duckduckgo.com. The site is very on topic. It's hosted under domain Keyword.com, and it's about commercial product which addresses the Keyword. How can I know what happened?

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• Dual monitor working incorrectly on a Dell XPS 8300 with an AMD Radeon HD 6450

  - by John

  I have been having trouble with Ubuntu on my Dell XPS 8300 (Actual image of the desktop). I have heard that the AMD Radeon HD 6450 has trouble with Ubuntu, and I believe that it is the source of the problem (though I am no expert by any means). When I boot the computer and choose to run Ubuntu, on a rare occasion both monitors (I have an AOC and a Samsung) will display their correct desktops, however most of the time, one of the desktops will be shifted away from its proper position and awkwardly positioned on the screen (showing the login box in the middle/right etc). If anyone has any advice on how to fix this, that would be greatly appreciated.

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• Point Light Soft Shadows

  - by notabene

  How to implement soft shadows for omni directional (point) light. We use typical shadow mapping technique. Depth is rendered to texture cube and addresing is pretty simple then. Just using vector from light to fragments world position. It works perfectly. Until you want soft shadows. In our engine we use PCSS technique for spot lights. But for point light there begins troubles. How to sample in 3D? I developed technique when orthonormal basis is created from a direction and upvector (0,1,0). And then multiply sampling vector (something like this (1.0,i/depthMapSize,j/depthMapSize) with this basis. But this (of course :)) looks pretty bad for vectors near (0,1,0) and (0,-1,0). I will appreciate any help on this.

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• How should I organise classes for a space simulator?

  - by Peteyslatts

  I have pretty much taught myself everything I know about programming, so while I know how to teach myself (books, internet and reading API's), I'm finding that there hasn't been a whole lot in the way of good programming. I am finishing up learning the basics of XNA and I want to create a space simulator to test my knowledge. This isn't a full scale simulator, but just something that covers everything I learned. It's also going to be modular so I can build on it, after I get the basics down. One of the early features I want to implement is AI. And I want to take this into account as I'm designing my classes so I can minimize rewriting code. So my question: How should I design ship classes so that both the player and AI can use them? The only idea I have so far is: Create a ship class that contains stats, models, textures, collision data etc. The player and AI would then have the data for position, rotation, health, etc and would base their status off of the ship stats.

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• How do I find which isometric tiles are inside the cameras current view?

  - by Steve

  I'm putting together an isometric engine and need to cull the tiles that aren't in the camera's current view. My tile coordinates go from left to right on the X and top to bottom on the Y with (0,0) being the top left corner. If I have access to say the top left, top right, bottom left and bottom right corner coordinates, is there a formula or something I could use to determine which tiles fall in range? This is a screenshot of the layout of the tiles for reference. If there isn't one, or there's a better way to determine which tiles are on screen and which to cull, I'm all ears and am grateful for any ideas. I've got a few other methods I may be able to try such as checking the position of the tile against a rectangle. I pretty much just need something quick. Thanks for giving this a read =)

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