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• Initial direction of intersection between two moving vehicles?

  - by Larolaro

  I'm working with a bit of projectile prediction for my AI and I'm looking for some ideas, any input? If a blue vehicle is moving in a direction at a constant speed of X m/s and a stationary orange vehicle has a rocket that travels Y m/s, which initial direction would the orange vehicle have to fire the rocket for it to hit the blue vehicle at the earliest time in the future? Thanks for reading!

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• Possible applications of algorithm devised for differentiating between structured vs random text

  - by rooznom

  I have written a program that can rapidly (within 5 sec on a 2GB RAM desktop, 2.33 Ghz CPU) differentiate between structured text (e.g english text) and random alphanumeric strings. It can also provide a probability score for the prediction. Are there any practical applications/uses of such a program. Note that the program is based on entropy models and does not have any dictionary comparisons in its workflow. Thanks in advance for your responses

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• Les quatre tendances qui vont changer la Business Intelligence dans les trois ans à venir, selon Gartner

  Les 4 tendances qui changeront (peut-être) la BI Dans les trois ans à venir, selon Gartner Dans le cadre de ses Prédiction 2011, le cabinet Gartner a identifié quatre grandes évolutions qui devraient impacter le domaine de la Business Intelligence. Ces prévisions restent hypothétiques mais elle s'appuie tout de même sur des tendances lourdes observables. Les voici en résumé : 1 - En 2013, 33% des fonctions de BI seront consommées au travers d'appareils mobiles Le taux d'adoption et la grande disponibilité des appareils nomades, ajoutée aux efforts des éditeurs de BI (développement de nouveaux produits et marketing) devraient rapidement générer ...

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• The Newest SEO Strategies - Stay Ahead of the Curve

  There are many SEO strategies around, each is promising top positions in search results in short time. While this may sound attractive there are many facts that actually prevent any prediction about possible rankings.

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• Building vs. Buying a Master Data Management Solution

  - by david.butler(at)oracle.com

  Many organizations prefer to build their own MDM solutions. The argument is that they know their data quality issues and their data better than anyone. Plus a focused solution will cost less in the long run then a vendor supplied general purpose product. This is not unreasonable if you think of MDM as a point solution for a particular data quality problem. But this approach carries significant risk. We now know that organizations achieve significant competitive advantages when they deploy MDM as a strategic enterprise wide solution: with the most common best practice being to deploy a tactical MDM solution and grow it into a full information architecture. A build your own approach most certainly will not scale to a larger architecture unless it is done correctly with the larger solution in mind. It is possible to build a home grown point MDM solution in such a way that it will dovetail into broader MDM architectures. A very good place to start is to use the same basic technologies that Oracle uses to build its own MDM solutions. Start with the Oracle 11g database to create a flexible, extensible and open data model to hold the master data and all needed attributes. The Oracle database is the most flexible, highly available and scalable database system on the market. With its Real Application Clusters (RAC) it can even support the mixed OLTP and BI workloads that represent typical MDM data access profiles. Use Oracle Data Integration (ODI) for batch data movement between applications, MDM data stores, and the BI layer. Use Oracle Golden Gate for more real-time data movement. Use Oracle's SOA Suite for application integration with its: BPEL Process Manager to orchestrate MDM connections to business processes; Identity Management for managing users; WS Manager for managing web services; Business Intelligence Enterprise Edition for analytics; and JDeveloper for creating or extending the MDM management application. Oracle utilizes these technologies to build its MDM Hubs.  Customers who build their own MDM solution using these components will easily migrate to Oracle provided MDM solutions when the home grown solution runs out of gas. But, even with a full stack of open flexible MDM technologies, creating a robust MDM application can be a daunting task. For example, a basic MDM solution will need: a set of data access methods that support master data as a service as well as direct real time access as well as batch loads and extracts; a data migration service for initial loads and periodic updates; a metadata management capability for items such as business entity matrixed relationships and hierarchies; a source system management capability to fully cross-reference business objects and to satisfy seemingly conflicting data ownership requirements; a data quality function that can find and eliminate duplicate data while insuring correct data attribute survivorship; a set of data quality functions that can manage structured and unstructured data; a data quality interface to assist with preventing new errors from entering the system even when data entry is outside the MDM application itself; a continuing data cleansing function to keep the data up to date; an internal triggering mechanism to create and deploy change information to all connected systems; a comprehensive role based data security system to control and monitor data access, update rights, and maintain change history; a flexible business rules engine for managing master data processes such as privacy and data movement; a user interface to support casual users and data stewards; a business intelligence structure to support profiling, compliance, and business performance indicators; and an analytical foundation for directly analyzing master data. Oracle's pre-built MDM Hub solutions are full-featured 3-tier Internet applications designed to participate in the full Oracle technology stack or to run independently in other open IT SOA environments. Building MDM solutions from scratch can take years. Oracle's pre-built MDM solutions can bring quality data to the enterprise in a matter of months. But if you must build, at lease build with the world's best technology stack in a way that simplifies the eventual upgrade to Oracle MDM and to the full enterprise wide information architecture that it enables.

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• Constraining to parent container with MouseDragElementBehavior

  - by anonymous

  Hi all, I just had a question regarding constraining a control's drag and drop movement to its parent canvas. I tried using the ConstrainToParentBounds property on the MouseDragElementBehavior, however, when this is used the drag must be done really slowly or the movement of the control is choppy or stops altogether. So I am attempting to implement my own boundary constraints. I seem to be running into difficulty though. I am still using the MouseDragElementBehavior but am attempting to supplement it by also handling mouseleftbuttondown, mousemove, mouseleftbuttonup events. I know that these are working (haven't been overridden by the MouseDragElementBehavior) as I have tested them using other methods. I will post my current code below: private void Control_MouseMove(object sender, MouseEventArgs e) { MyControl mc = (MyControl)sender; Canvas canvas = (Canvas)mc.parent; GeneralTransform ct = canvas.TransformToVisual(Application.Current.RootVisual as UIElement; Point canvas_offset = ct.Transform(new Point(0,0)); double canvasTop = canvas_offset.Y; double canvasLeft = canvas_offset.X; GeneralTransform gt = mc.TransformToVisual(Application.Current.RootVisual as UIElement); Point offset = gt.Transform(new Point(0,0)); double controlTop = offset.Y; double controlLeft = offset.X; if(isMouseCaptured) { if(controlTop < canvasTop) { mc.Opacity = 1; //to test if conditions are being met, seems to indicate ok mc.setValue(Canvas.TopProperty, canvasTop); } if(controlLeft < canvasLeft) { mc.Opacity = 1; mc.setValue(Canvas.TopProperty, canvasTop); } } } This is what my code looks like at the moment (I realize there is nothing there for right/bottom). I've tried a bunch of different things at this point and none of them seem to give the desired result; the control's movement is still not constrained to the canvas. Any help/pointers would be greatly appreciated. Thanks!

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• More efficient comparison of numbers

  - by Pez Cuckow

  I have an array which is part of a small JS game I am working on I need to check (as often as reasonable) that each of the elements in the array haven't left the "stage" or "playground", so I can remove them and save the script load I have coded the below and was wondering if anyone knew a faster/more efficient way to calculate this. This is run every 50ms (it deals with the movement). Where bots[i][1] is movement in X and bots[i][2] is movement in Y (mutually exclusive). for (var i in bots) { var left = parseInt($("#" + i).css("left")); var top = parseInt($("#" + i).css("top")); var nextleft = left + bots[i][1]; var nexttop = top + bots[i][2]; if(bots[i][1]>0&&nextleft>=PLAYGROUND_WIDTH) { remove_bot(i); } else if(bots[i][1]<0&&nextleft<=-GRID_SIZE) { remove_bot(i); } else if(bots[i][2]>0&&nexttop>=PLAYGROUND_HEIGHT) { remove_bot(i); } else if(bots[i][2]<0&&nexttop<=-GRID_SIZE) { remove_bot(i); } else { //alert(nextleft + ":" + nexttop); $("#" + i).css("left", ""+(nextleft)+"px"); $("#" + i).css("top", ""+(nexttop)+"px"); } } On a similar note the remove_bot(i); function is as below, is this correct (I can't splice as it changes all the ID's of the elements in the array. function remove_bot(i) { $("#" + i).remove(); bots[i] = false; } Many thanks for any advice given!

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• display flex xml with dash

  - by user217582

  In Flex, how do I display "midi-channel" to s:Label? I tried songTitle.text = mainXML.child("movement-title").text(); it worked but unsure how to display for midi-channel part. <score-partwise> <movement-title>zsdf</movement-title> <part-list> <score-part id="P1"> <part-name>Piano</part-name> <score-instrument id="P1-I1"> <instrument-name>Acoustic Grand Piano</instrument-name> </score-instrument> <midi-instrument id="P1-I1"> <midi-channel>1</midi-channel> <midi-program>1</midi-program> </midi-instrument> </score-part> </part-list>

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• Tying down a cloud by virtualizing everything and then locking VMs to real hardware as necessary

  - by tudor

  I'm looking for a cloud software solution that: Can run on both server and desktop machines; Virtualizes hardware and has the option of exposing each real machine to the cloud; Allows a VM to be "locked" to a set of real hardware capabilities and stay there until moved (e.g. a user's "real" desktop); Allows a VM to link to some types of devices elsewhere (e.g. USB/serial via ethernet); and Is geography-aware to control movement of VMs between real networks. I'm aware that this may be the holy grail of virtualization, and I've searched alot. Some solutions appear to meet some criteria but not others. Most cloud implementations appear to ignore real hardware, for example. I realise that this may be solved by using three different implementations in combination: A standard cloud server farm. A bare-metal network backup utility with PXEBoot. VNC and/or VDI. (VNC obviously would require the real hardware to be running.) This combination, however, has some serious drawbacks that I'd like to solve by treating it as one system. My explanation follows... I have a network of real servers and desktops in multiple locations. I've virtualized servers before using Virtualbox and that's worked quite well. I've even connected USB devices to VMs on servers. I would like to virtualize the desktops in all my offices to facilitate movement of desktops, remote access (e.g. VDI) and bare-metal backups. However, I know that there are problems with this. For example, some desktops have specific hardware (e.g. 3D graphics cards, USB devices, etc) that limit their mobility. Geographic constraints also limit movement in that VMs can be moved easily within offices, but transferring between offices is not always preferable. What I would like to find is a system that can virtualize everything from bare-metal easily by maintaining an abstraction layer on each client and server machine that exposes the hardware available and runs as a cloud. Then certain VMs would be "locked" to specific hardware (so that, e.g. the VM runs only on their own desktop.) This would be required for situations where speed is important (e.g. 3D graphics pass-through). In addition, abstracted low-speed devices (e.g. USB) could be piped from real hardware to a VM in the cloud. This is important since if a VM is taken down, another VM can connect to the real hardware for minimum downtime.

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• Custom animation problem in Powerpoint 2003

  - by Tom Gullen

  I have an animation of a grid that scrolls to the left. It's a Gantt chart, and it works fine. I then have several elements I want to drop on the grid, I give them all the same movement animation and this works fine, everything scrolls at the same speed and time. However I want to add entrance animations for the elements on the grid, I can have it so that when all the entrance animations are complete then it starts scrolling, but I want it to enter whilst it is scrolling. How do you have an entrance animation for an element and keep it's position updated? The entrance animation and movement animation don't seem to work together as expected when run simultaneously. cheers!

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• Dell D630 - Touchpad does not move the mouse cursor

  - by Dean McKenzie

  Windows XP - Dell D630 - Synaptics Touch Pad driver installed. The system tray icon that shows the movement of your finger on the touchpad registeres movement. The scroll feature of the touchpad works on any window with a scroll bar. The double click works even. But it never actually moves the cursor on the screen. An external mouse works with out problems, and I've replaced the palm-rest/touchpad and it continues to happen. The touch stick in the middle of the keyboard works without problems. Does anyone have any ideas?

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• Remapping keyboard to get extra cursor keys - but why stick to VIM standard hjkl

  - by Carlo V. Dango

  Inspired from VIM I recently remapped my keyboard layout to get extra keys for cursor movement. Being fluent in both QWERTY and DVORAK, it came quite natural to me to remap the DF and JK keys rather than the VIM standard hjkl keys. Here is my reasoning It enables me to quickly identify cursor keys since F and J are physically marked on my keyboard I'm using two hands for movement rather than one. I guess from DVORAK I learned to appreciate shifting between hands rather than using primarily one hand. It maps well with the Kinesis keyboard mapping http://www.kinesis-ergo.com/advantage.htm that I use occasionally. I feel I'm using my strongest fingers. I don't have to stretch my right index finger to read H as I would using the VIM layout. However, since I am still doing green field explorations on the cursor key remapping, I'd like others to share their experiences and/or criticize my suggested mapping. PS. If you want to toy around with my remapping using Autohotkey here is my script ; extra cursor keys. !d:: Send {Left} <^>!d:: Send {Left} !f:: Send {Right} <^>!f:: Send {Right} !j:: Send {Up} <^>!j:: Send {Up} !k:: Send {Down} <^>!k:: Send {Down} The question Is this mapping sane or is the VIM mapping superior?

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• CodePlex Daily Summary for Thursday, June 06, 2013

  CodePlex Daily Summary for Thursday, June 06, 2013Popular ReleasesReliability Modeling and Prediction: Reliability Prediction v2.0.1: Including the reliability modeling schema and the reliability prediction tool. Including case studies (Reporting service and WebScan system). Check Readme.txt for a quick tutorial.Virtual Sport for Sport Team: Virtual Sport Website: This is the website to manage a sports team. Through this website you can manage the members of the team, from players to staff, schedules, and more. and for supporter, be able more easily get to know team through the this websiteChristoc's DotNetNuke Module Development Template: DotNetNuke 7 Project Templates V2.3 for VS2012: V2.3 - Release Date 6/5/2013 Items addressed in this 2.3 release Fixed bad namespace for BusinessController in one of the C# templates. Updated documentation in all templates. Setting up your DotNetNuke Module Development Environment Installing Christoc's DotNetNuke Module Development Templates Customizing the latest DotNetNuke Module Development Project TemplatesPulse: Pulse 0.6.7.0: A number of small bug fixes to stabilize the previous Beta. Sorry about the never ending "New Version" bug!ZXMAK2: Version 2.7.5.3: - debugger: add LPC indicator (last executed opcode pc) - add host joystick support (written by Eltaron) - change file extension for CMOS PENTEVO to "cmos" - add hardware value monitor (see Memory Map for PENTEVO/ATM/PROFI)QlikView Extension - Animated Scatter Chart: Animated Scatter Chart - v1.0: Version 1.0 including Source Code qar File Example QlikView application Tested With: Browser Firefox 20 (x64) Google Chrome 27 (x64) Internet Explorer 9 QlikView QlikView Desktop 11 - SR2 (x64) QlikView Desktop 11.2 - SR1 (x64) QlikView Ajax Client 11.2 - SR2 (based on x64)BarbaTunnel: BarbaTunnel 7.2: Warning: HTTP Tunnel is not compatible with version 6.x and prior, HTTP packet format has been changed. Check Version History for more information about this release.Harvester - Debug Viewer for Trace, NLog & Log4Net: v2.0.1 (.NET 4.0): Minor Updates Fixed incorrect process naming being displayed if process ID reassigned before cache invalidated. Fixed incorrect event type/source for TraceListener.TraceData methods. Updated NLog package references. Official Documentation Moved to GitHub http://cbaxter.github.com/Harvester Official Source Moved to GitHub https://github.com/cbaxter/HarvesterSuperWebSocket, a .NET WebSocket Server: SuperWebSocket 0.8: This release includes these changes below: Upgrade SuperSocket to 1.5.3 which is much more stable Added handshake request validating api (WebSocketServer.ValidateHandshake(TWebSocketSession session, string origin)) Fixed a bug that the m_Filters in the SubCommandBase can be null if the command's method LoadSubCommandFilters(IEnumerable<SubCommandFilterAttribute> globalFilters) is not invoked Fixed the compatibility issue on Origin getting in the different version protocols Marked ISub...BlackJumboDog: Ver5.9.0: 2013.06.04 Ver5.9.0 (1) ?????????????????????????????????($Remote.ini Tmp.ini) (2) ThreadBaseTest?? (3) ????POP3??????SMTP???????????????? (4) Web???????、?????????URL??????????????? (5) Ftp???????、LIST?????????????? (6) ?????????????????????Media Companion: Media Companion MC3.569b: New* Movies - Autoscrape/Batch Rescrape extra fanart and or extra thumbs. * Movies - Alternative editor can add manually actors. * TV - Batch Rescraper, AutoScrape extrafanart, if option enabled. Fixed* Movies - Slow performance switching to movie tab by adding option 'Disable "Not Matching Rename Pattern"' to Movie Preferences - General. * Movies - Fixed only actors with images were scraped and added to nfo * Movies - Fixed filter reset if selected tab was above Home Movies. * Updated Medi...Nearforums - ASP.NET MVC forum engine: Nearforums v9.0: Version 9.0 of Nearforums with great new features for users and developers: SQL Azure support Admin UI for Forum Categories Avoid html validation for certain roles Improve profile picture moderation and support Warn, suspend, and ban users Web administration of site settings Extensions support Visit the Roadmap for more details. Webdeploy package sha1 checksum: 9.0.0.0: e687ee0438cd2b1df1d3e95ecb9d66e7c538293b Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.93: Added -esc:BOOL switch (CodeSettings.AlwaysEscapeNonAscii property) to always force non-ASCII character (ch > 0x7f) to be escaped as the JavaScript \uXXXX sequence. This switch should be used if creating a Symbol Map and outputting the result to the a text encoding other than UTF-8 or UTF-16 (ASCII, for instance). Fixed a bug where a complex comma operation is the operand of a return statement, and it was looking at the wrong variable for possible optimization of = to just .Document.Editor: 2013.22: What's new for Document.Editor 2013.22: Improved Bullet List support Improved Number List support Minor Bug Fix's, improvements and speed upsPHPExcel: PHPExcel 1.7.9: See Change Log for details of the new features and bugfixes included in this release, and methods that are now deprecated.Droid Explorer: Droid Explorer 0.8.8.10 Beta: Fixed issue with some people having a folder called "android-4.2.2" in their build-tools path. - 16223 Magick.NET: Magick.NET 6.8.5.402: Magick.NET compiled against ImageMagick 6.8.5.4. These zip files are also available as a NuGet package: https://nuget.org/profiles/dlemstra/patterns & practices: Data Access Guidance: Data Access Guidance Drop3 2013.05.31: Drop 3DotNet.Highcharts: DotNet.Highcharts 2.0 with Examples: DotNet.Highcharts 2.0 Tested and adapted to the latest version of Highcharts 3.0.1 Added new chart types: Arearange, Areasplinerange, Columnrange, Gauge, Boxplot, Waterfall, Funnel and Bubble Added new type PercentageOrPixel which represents value of number or number with percentage. Used for sizes, width, height, length, etc. Removed inheritances in YAxis option classes. Closed issues: 682: Missing property - XAxisPlotLinesLabel.Text 688: backgroundColor and plotBackgroundColor are...DirectX Tool Kit: May 2013: May 30, 2013 Added more GeometricPrimitives: Cone, Tetrahedron, Octahedron, Dodecahedron, Icosahedron Updated to support loading new metadata from DDS files (if present) Fixed bug with loading of WIC 32bpp RGBE format images Fixed bug when skipping mipmaps in a 1D or 2D array texture DDS fileNew Projectsabang: ????????Alex Develop Kit: ????????C#?????????。AnaLog - Analyse Logique: Software for logical equations analyse. App Excess: App Platform for Windows.Associativy Frontend Engines Administration: Frontend Engines Administration module for the Associativy (http://associativy.com) Orchard graph platform.ATDD Applied (Example): Sample code for Nordic Testing Days 2013 workshop - Acceptance Test Driven Development Applied: An Intro to ATDD using Jasmine and SpecFlowAzCAD: AzCAD is a free CAD program.BVVD Project: SOURCE CODECrzy Engine: C# and XNA ORPG Game Development engine.Custom Pong: Custom PongEDID Puller: Simple C# application showing how to get the EDIDs of the connected monitors to a PC, in particular the manufacturer and model of the display device.GooMUI: A desktop player for the Google Play Music service that runs on Windows.Had: HadIIS Express GUI: The GUI for IISExpress (version 7.5 and 8.0) jean0605jabbrchangbranch: ddjQueryBuddy Port to .Net 4.0+: Upgrading the project to current dot net will make using this app easier for some folks!Kinopoly: Dieses Projekt ist eine Arbeit der Berufschule Bern, GIBB. Das Ziel ist es das berühmte Spiel Monopoly im Film Theme als eine Clientapplikation zu realisieren.Magic Engine - 2D and 3D engine developed by school students: Magic Engine - 2D and 3D engine developed by school studentsMetrics calculation: Calculates metrics with the use of Driven Metrics.Metro WPF: Metro WPF provides a set of controls and styles for you to build your metro style WPF applications.mysitie: this is unknown error site Native API Test Command-Line Utility: A command-line utility that allows the user to call native API function interactively and experiment with how they function.prakark06052013Hg01: *bold* _italics_ +underline+ ! Heading 1 !! Heading 2 * Bullet List ** Bullet List 2 # Number List ## Number List 2 [another wiki page] [url:http://www.example.prakark06052013Tfs01: *bold* _italics_ +underline+ ! Heading 1 !! Heading 2 * Bullet List ** Bullet List 2 # Number List ## Number List 2 [another wiki page] [url:http://www.example.prakarkGit06052013Git01: *bold* _italics_ +underline+ ! Heading 1 !! Heading 2 * Bullet List ** Bullet List 2 # Number List ## Number List 2 [url:http://www.example.com] {"Do QlikView Extension - Animated Scatter Chart: Animated scatter chart for QlikView, inspired by D3js.orgREADPDB(Program Database Reader): This tool uses the Microsoft Debug Interface Access Software Development Kit (DIA SDK) to parser PDB file SelfProject: Just For TestSlWfDesign: 11212SSZZ: SSZZ is a tool for Data Analysistest project codeplex: This is a testtesttom06052013git01: dfdstesttom06052013hg01: *bold* _italics_ +underline+ ! Heading 1 !! Heading 2 * Bullet List ** Bullet List 2 # Number List ## Number List 2 [another wiki page] [url:http://www.example.testtom06052013tfs01: gfdgfdthree: It's a personal project.Validation Rules Framework for C++: C++ framework for rule creation, validation and management.

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• Common way of animating 'motion' for walk cycle animations

  - by Ben Hymers

  I've just posted this at the Blender artists' forums before realising I would probably get a better response from a more game development-specific audience, so apologies for cross-posting! It's for the right reasons :) I'm a programmer trying to animate a character walking for a game project, using Ogre. I've made a very simple walk cycle in Blender and exported it to Ogre, and it plays just fine. By fine, I mean it works, but there's terrible foot sliding. This is because I just animated the walk in-place (at the origin) in Blender, and of course I don't know what "speed of walk" that corresponds to, so when I move the character in-game the motion doesn't necessarily match up with the movement of the feet in the animation. So my question is: what's the normal approach for this kind of thing? At work we use Maya, and the animators either animate a special 'moveTrans' node that represents the "position" of the character (or have the exporter generate it for them from the movement of the root node), then the game can read this to know how fast the animation moves the character. So in the Maya file, the character will walk forward for one cycle and this extra node will follow along with them by their feet. I've not seen anything like this in open-source land, and there's certainly no provision for that in the Ogre Exporter script. What do you chaps normally do for this?

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• Doing a passable 4X game AI

  - by Extrakun

  I am coding a rather "simple" 4X game (if a 4X game can be simple). It's indie in scope, and I am wondering if there's anyway to come up with a passable AI without having me spending months coding on it. The game has three major decision making portions; spending of production points, spending of movement points and spending of tech points (basically there are 3 different 'currency', currency unspent at end of turn is not saved) Spend Production Points Upgrade a planet (increase its tech and production) Build ships (3 types) Move ships from planets to planets (costing Movement Points) Move to attack Move to fortify Research Tech (can partially research a tech i.e, as in Master of Orion) The plan for me right now is a brute force approach. There are basically 4 broad options for the player - Upgrade planet(s) to its his production and tech output Conquer as many planets as possible Secure as many planets as possible Get to a certain tech as soon as possible For each decision, I will iterate through the possible options and come up with a score; and then the AI will choose the decision with the highest score. Right now I have no idea how to 'mix decisions'. That is, for example, the AI wishes to upgrade and conquer planets at the same time. I suppose I can have another logic which do a brute force optimization on a combination of those 4 decisions.... At least, that's my plan if I can't think of anything better. Is there any faster way to make a passable AI? I don't need a very good one, to rival Deep Blue or such, just something that has the illusion of intelligence. This is my first time doing an AI on this scale, so I dare not try something too grand too. So far I have experiences with FSM, DFS, BFS and A*

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• how to stop the array of sprite in cocos2d?

  - by prakash s

  I am devoloping the bubble shooter game in cocos2d how to stop the sprite movement at the center of the game scene in my game bec i want to shoot the bubble after stopping the movenent at certain position here is my code -(void)addTarget { CGSize winSize = [[CCDirector sharedDirector] winSize]; NSMutableArray * movableSprites = [[NSMutableArray alloc] init]; NSArray *images = [NSArray arrayWithObjects:@"1.png", @"2.png", @"3.png", @"4.png",@"5.png", @"6.png", @"7.png",@"8.png" ,nil]; for(int i = 0; i < images.count; ++i) { int index = (arc4random() % 8)+1; NSString *image = [NSString stringWithFormat:@"%d.png", index]; CCSprite*target = [CCSprite spriteWithFile:image]; // generate random number based on size of array (array size is larger than 10) float offsetFraction = ((float)(i+1))/(images.count+1); //target.position = ccp(winSize.width*offsetFraction, winSize.height/2); target.position = ccp(350*offsetFraction, 460); [self addChild:target]; [movableSprites addObject:target]; id actionMove = [CCMoveTo actionWithDuration:10 position:ccp(350*offsetFraction, 100)]; id actionMoveDone = [CCCallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)]; [target runAction:[CCSequence actions:actionMove, actionMoveDone, nil]]; } here bubbles are moving from top to bottom but after 5 rows my bubble movement should be stop so please help me to get that logic

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• Algorithm for optimal control on space ship using accelerometer input data

  - by mm24

  Does someone have a good algorithm for controlling a space ship in a vertical shooter game using acceleration data? I have done a simple algorithm, but works very badly. I save an initial acceleration value (used to calibrate the movement according to the user's initial position) and I do subtract it from the current acceleration so I get a "calibrated" value. The problem is that basing the movement solely on relative acceleration has an effect of loss of sensitivity: certain movements are independent from the initial position. Would anyone be able to share a a better solution? I am wondering if I should use/integrate also inputs from gyroscope hardware. Here is my sample of code for a Cocos2d iOS game: - (void) accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration { if (calibrationLayer.visible){ [self evaluateCalibration:acceleration]; initialAccelleration=acceleration; return; } if([self evaluatePause]){ return; } ShooterScene * shooterScene = (ShooterScene *) [self parent]; ShipEntity *playerSprite = [shooterScene playerShip]; float accellerationtSensitivity = 0.5f; UIAccelerationValue xAccelleration = acceleration.x - initialAccelleration.x; UIAccelerationValue yAccelleration = acceleration.y - initialAccelleration.y; if(xAccelleration > 0.05 || xAccelleration < -0.05) { [playerSprite setPosition:CGPointMake(playerSprite.position.x + xAccelleration * 80, playerSprite.position.y + yAccelleration * 80)]; } else if(yAccelleration > 0.05 || yAccelleration < -0.05) { [playerSprite setPosition:CGPointMake(playerSprite.position.x + xAccelleration * 80, playerSprite.position.y + yAccelleration * 80)]; } }

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• How to update entity states and animations in a component-based game

  - by mivic

  I'm trying to design a component-based entity system for learning purposes (and later use on some games) and I'm having some troubles when it comes to updating entity states. I don't want to have an update() method inside the Component to prevent dependencies between Components. What I currently have in mind is that components hold data and systems update components. So, if I have a simple 2D game with some entities (e.g. player, enemy1, enemy 2) that have Transform, Movement, State, Animation and Rendering components I think I should have: A MovementSystem that moves all the Movement components and updates the State components And a RenderSystem that updates the Animation components (the animation component should have one animation (i.e. a set of frames/textures) for each state and updating it means selecting the animation corresponding to the current state (e.g. jumping, moving_left, etc), and updating the frame index). Then, the RenderSystem updates the Render components with the texture corresponding to the current frame of each entity's Animation and renders everything on screen. I've seen some implementations like Artemis framework, but I don't know how to solve this situation: Let's say that my game has the following entities. Each entity have a set of states and one animation for each state: player: "idle", "moving_right", "jumping" enemy1: "moving_up", "moving_down" enemy2: "moving_left", "moving_right" What are the most accepted approaches in order to update the current state of each entity? The only thing that I can think of is having separate systems for each group of entities and separate State and Animation components so I would have PlayerState, PlayerAnimation, Enemy1State, Enemy1Animation... PlayerMovementSystem, PlayerRenderingSystem... but I think this is a bad solution and breaks the purpose of having a component-based system. As you can see, I'm quite lost here, so I'd very much appreciate any help.

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• Delaying a Foreach loop half a second

  - by Sigh-AniDe

  I have created a game that has a ghost that mimics the movement of the player after 10 seconds. The movements are stored in a list and i use a foreach loop to go through the commands. The ghost mimics the movements but it does the movements way too fast, in split second from spawn time it catches up to my current movement. How do i slow down the foreach so that it only does a command every half a second? I don't know how else to do it. Please help this is what i tried : The foreach runs inside the update method DateTime dt = DateTime.Now; foreach ( string commandDirection in ghostMovements ) { int mapX = ( int )( ghostPostition.X / scalingFactor ); int mapY = ( int )( ghostPostition.Y / scalingFactor ); // If the dt is the same as current time if ( dt == DateTime.Now ) { if ( commandDirection == "left" ) { switch ( ghostDirection ) { case ghostFacingUp: angle = 1.6f; ghostDirection = ghostFacingRight; Program.form.direction = ""; dt.AddMilliseconds( 500 );// add half a second to dt break; case ghostFacingRight: angle = 3.15f; ghostDirection = ghostFacingDown; Program.form.direction = ""; dt.AddMilliseconds( 500 ); break; case ghostFacingDown: angle = -1.6f; ghostDirection = ghostFacingLeft; Program.form.direction = ""; dt.AddMilliseconds( 500 ); break; case ghostFacingLeft: angle = 0.0f; ghostDirection = ghostFacingUp; Program.form.direction = ""; dt.AddMilliseconds( 500 ); break; } } } }

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• c++ How to use angular velocity that derived from inertia and force(torque) in 3d

  - by user1217203

  I am relatively new to game development. May my terminology and description are not appropriate. Please excuse my poor phrasing and help me by giving advice on how to question better if this question seems less fitting. I really appreciate your efforts. Hi. I am having hard time interpreting the set of values I have. I have inertia and force(torque) in terms of x y z. FYI I used x and y coordinates as my ground, flat coordinates and z as my up/down. I am assuming that since f = ma, that angular acceleration must be a = f / m. So I divide my torque by inertia. Then I add those x y z values to my angular velocity variable's x y z. However these x y z values confuse me. Don't I need angle/sec or radian/sec sort of values in order to apply rotation? The x y z values I have seemed to not say anything about radians or angular movement. Question : If I have ( 1, 2, 3 ) or any ( x, y, z ) as my angular velocity, how do I actually apply it as angular movement? FYI Here I am pasting my code : float mass = 100; float devidedMass = 1.0/12 * mass; Vec3 innertia( devidedMass* (_box._size.z*_box._size.z + _box._size.x*_box._size.x), devidedMass* (_box._size.y*_box._size.y + _box._size.x*_box._size.x), devidedMass* (_box._size.y*_box._size.y + _box._size.z*_box._size.z )); box._angAccel += forceAng/innertia; box._angVelo += box._angAccel; box._angAccel.allZero(); source of my inertia calculation http://www.health.uottawa.ca/biomech/courses/apa4311/solids.pdf

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• Clean MVC design when there is viewer latency

  - by Tony Suffolk 66

  It isn't clear if this question has already been answered, so apologies in advance if this is a duplicate : I am implementing a game and trying to design around a clean MVC pattern - so my Control plane will implement the rules of the game (but not how the game is displayed), and the View plane implements how the game is displayed, and user iteraction - i.e. what game items or controls the user has activated. The challenge that I have is this : In my game the Control Plane can move game items more or less instaneously (The decision about what item to place where - and some of the initial consequences of that placement are reasonably trivial to calculate), but I want to design the Control Plane so that the View plane can display these movements either instaneously or using movement animations. The other complication is that player interaction must be locked out while those game items are moving (similar to chess - you can't attack an opposing piece as it moves past one of your pieces) So do I : Implement all the logic in the Control Plane asynchronously - and separate the descision making from the actions - so the Control plane decides piece 'A' needs to move to a given place - tells the view plane, and but does not implement the move in data until the view plane informs the control plane that the move/animation is complete. A lot of interlock points between the two layers. Implement all the control plane logic in one place - decisions and movement (keeping track of what moved where), and pass all the movements in one go to the View plane to do with what it will. Control Plane is almost fire and forget here. A hybrid of 1 & 2 - The control plane implements all the moves in a temporary data store - but maintains a second store which reflects what is actually visible to the viewer, based on calls and feedback from the View plane. All 3 are relatively easy to implement (target language is python), but having never done a clean MVC pattern with view latency before - I am not sure which design is best

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• What's the right/standard way of achieving separation of concerns?

  - by Ghanima

  Some background: I want to start developing games, and taking some of the advice given in this site, I've started with something simple and familiar, such as pong, tetris, etc. I want to take as much time as needed to make sure that I have the basics right before moving on to something bigger. I have medium programming experience but I realize making games is a different thing. I find myself wondering many things like should this be in a separate class? Should this module handle this stuff or is it better to let other modules have that kind of functionality? For example, the bouncing of a ball in pong, right now is handled in the ball module, but maybe it's better that some other module did it. Right now I have different modules: one for the graphics, one for the game logic, and others for the objects (depending on the kind of movement required, not all the objects are alike). I know I am asking a lot, any tips you have will be very much appreciated. Short question: What's the right or standard way of separating the modules? What have you found most effective? Is it enough to just keep the drawing (graphics) and the logic separate? Is it necessary to have a lot of classes? (for example for the objects in the game, to handle the movement, etc)

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• Trying to make a game with C++, using lists to store bullets and enemies, but they are not erased

  - by XD_dued

  I've been trying to make a pretty simple space shooter game with C++, and I have been having a lot of trouble trying to use lists to store enemies and bullets. Basically I followed the post here almost exactly to store my bullets: SDL Bullet Movement I've done something similar to store my enemies. However, when I call bullets.erase(it++), for some reason the bullet is not erased. When the bullet movement is run for the next frame, it tries to re delete the bullet and segfaults the program. When I comment out the erase line, it runs fine, but the bullets are then never erased from the list... Is there any reason why the elements of the list aren't being deleted? I also set it up to print the number of elements in the list for every iteration, and it does not go down after deleting. Thanks! EDIT: Here's the specific code I'm using to store my enemies and having them act: std::list<Grunt*> doGrunts(std::list<Grunt*> grunts) { for(std::list<Grunt*>::iterator it = grunts.begin(); it != grunts.end();) { if((*it)->getHull() == 0) { delete * it; grunts.erase(it++); } else { (**it).doUnit(grunts, it); ++it; } } } Grunt is my enemy class, and the list grunts is a global variable. Is that my problem? When I pass the global into the function it becomes local? I assumed lists would be a reference type so thought this wouldn't be a problem. Sorry if this was a dumb question, I'm very new to C++, this is the first major thing I'm working on.

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• How do I make my character slide down high-angled slopes?

  - by keinabel

  I am currently working on my character's movement in Unity3D. I managed to make him move relatively to the mouse cursor. I set a slope limit of 45°, which does not allow the character to walk up the mountains with higher degrees. But he can still jump them up. How do I manage to make him slide down again when he jumped at places with too high slope? Thanks in advance. edit: Code snippet of my basic movement. using UnityEngine; using System.Collections; public class BasicMovement : MonoBehaviour { private float speed; private float jumpSpeed; private float gravity; private float slopeLimit; private Vector3 moveDirection = Vector3.zero; void Start() { PlayerSettings settings = GetComponent<PlayerSettings>(); speed = settings.GetSpeed(); jumpSpeed = settings.GetJumpSpeed(); gravity = settings.GetGravity(); slopeLimit = settings.GetSlopeLimit(); } void Update() { CharacterController controller = GetComponent<CharacterController>(); controller.slopeLimit = slopeLimit; if (controller.isGrounded) { moveDirection = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical")); moveDirection = transform.TransformDirection(moveDirection); moveDirection *= speed; if (Input.GetButton("Jump")) { moveDirection.y = jumpSpeed; } } moveDirection.y -= gravity * Time.deltaTime; controller.Move(moveDirection * Time.deltaTime); } }

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• Cutting Subscriber Churn with Media Intelligence

  - by Oracle M&E

  There's lots of talk in media and entertainment companies about using "big data".  But it's often hard to see through the hype and understand how big data brings benefits in the real world.  How about being able to predict with 92% accuracy which subscribers intend to cancel their subscription - and put in place a renewal strategy to dramatically reduce that churn?  That's what Belgian media company De Persgroep has achieved with Oracle's Media Intelligence solution.  "One of the areas in which we're able to achieve beautiful results using big data is the churn prediction," De Persgroep's CIO Luc Verbist explains in a new Oracle video.  "Based on all the data that we collect on websites and all your behavior, payment behavior and so on, we're able to make a prediction model, which, with an accuracy of 92 percent, is able to predict that you probably won't renew your newspaper, anymore. So our approach to renewal is completely different to the people in that segment than towards the other people. And this has brought us a lot of value and a lot of customers who didn't stop their newspaper where else they would have done so." De Persgroep is using Oracle's Big Data Appliance, along with software from Oracle partner NGDATA to build up a detailed "DNA profile" of each individual customer, based on every interaction, in real time.  This means that any change in behavior - a drop in content consumption, a late subscription payment, a negative social media comment - is captured.  Applying advanced data modeling techniques automatically converts those raw interactions into data with real business meaning - like that customer's risk of churning. The very same data profile - comprising hundreds if individual dimensions - can simultaneously drive targeted marketing campaigns - informing audience about new content that's most relevant and encouraging them to subscribe.  It can power content recommendations and personalization right in the content sites and apps. And it can link directly into digital advertising networks via platforms like Oracle's BlueKai data management platform (DMP), to drive increased advertising CPMs. Using Oracle's Media Intelligence solution enables this across De Persgroep's business - comprising eight newspapers and 25 magazines published in Belgium and The Netherlands, and digital properties including websites with 6m daily unique visitors, along with TV and radio stations. "The company strategy is in fact a customer-centric strategy, so we want to get a 360-view about our customers, about our prospects. And the big data project helped us to achieve that goal," says Verbist. Using Oracle's Big Data Appliance to underpin the solution created huge savings.   "The selection of the Big Data Appliance was quite easy.  It was very quick to install, very easy to install, as well. And it was far cheaper than building our own Hadoop cluster. So it was in fact a non-brainer," Verbist explains. Applying Media Intelligence approach has yielded incredible results for De Persgroep, including: Improved products - with a new understanding of how readers are consuming print and digital content across the day Improved customer segmentation - driving a 6X improvement in customer prospecting and acquisition when contacting a specific segment Having the project up and running in three months And that has led to competitive benefits for De Persgroep, as Luc Verbist explains: "one of the results we saw since we started using big data is that we're able to increase the gap between we as the market leader, and the second [by] more than 20 percent."

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