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• 250k connections for comet with node.js

  - by Nenad

  How to implement node.js to be able to handle 250k connections as comet server (client side we use socket.io)? Would the use of nginx as proxy/loadbalancer be the right solution? Or will HA-Proxy be the better way? Has anyone real world experience with 100k+ connections and can share his setup? Would a setup like this be the right one (Quad core CPU per server - start 4 Instances of node.js per Server?): nginx (as proxy / load balancing server) / | \ / | \ / | \ / | \ node server #1 node server #2 node server #3 4 instances 4 instances 4 instances

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• Node.js installation on Debian 6

  - by pvorb

  I used to use this method for node.js installation on Debian, since it was easy and everything worked fine. Even with multiple users. Since version 0.6.18~dfsg1-1 of the sid package, installation removes openssh-server. But I need OpenSSH to connect to my server. Is there any possibility to install Node.js via APT or do I have to compile it manually? This is my APT preferences file: Package: * Pin: release a=stable Pin-Priority: 800 Package: * Pin: release a=testing Pin-Priority: 650 Package: * Pin: release a=unstable Pin-Priority: 600

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• Cocos2d score resetting is messing up (long post warning)

  - by Jhon Doe

  The score is not resetting right at all,I am trying to make a high score counter where every time you passed previous high score it will update.However, right now it is resetting during the game. For example if I had high score of 2 during the game it will take 3 points just to put it up to 3 as high score instead of keep going up until it is game over. I have came to the conclusion that I need to reset it in gameoverlayer so it won't reset during game. I have been trying to to do this but no luck. hello world ./h #import "cocos2d.h" // HelloWorldLayer @interface HelloWorldLayer : CCLayer { int _score; int _oldScore; CCLabelTTF *_scoreLabel; } @property (nonatomic, assign) CCLabelTTF *scoreLabel; hello world init ./m _score = [[NSUserDefaults standardUserDefaults] integerForKey:@"score"]; _oldScore = -1; self.scoreLabel = [CCLabelTTF labelWithString:@"" dimensions:CGSizeMake(100, 50) alignment:UITextAlignmentRight fontName:@"Marker Felt" fontSize:32]; _scoreLabel.position = ccp(winSize.width - _scoreLabel.contentSize.width, _scoreLabel.contentSize.height); _scoreLabel.color = ccc3(255,0,0); [self addChild:_scoreLabel z:1]; hello world implement ./m - (void)update:(ccTime)dt { NSMutableArray *projectilesToDelete = [[NSMutableArray alloc] init]; CGRect projectileRect = CGRectMake( projectile.position.x - (projectile.contentSize.width/2), projectile.position.y - (projectile.contentSize.height/2), projectile.contentSize.width, projectile.contentSize.height); BOOL monsterHit = FALSE; NSMutableArray *targetsToDelete = [[NSMutableArray alloc] init]; for (CCSprite *target in _targets) { CGRect targetRect = CGRectMake( target.position.x - (target.contentSize.width/2), target.position.y - (target.contentSize.height/2), target.contentSize.width, target.contentSize.height); if (CGRectIntersectsRect(projectileRect, targetRect)) { CCParticleFire* explosion = [[CCParticleFire alloc] initWithTotalParticles:200]; explosion.texture =[[CCTextureCache sharedTextureCache] addImage:@"sun.png"]; explosion.autoRemoveOnFinish = YES; explosion.startSize = 20.0f; explosion.speed = 70.0f; explosion.anchorPoint = ccp(0.5f,0.5f); explosion.position = target.position; explosion.duration = 1.0f; [self addChild:explosion z:11]; [explosion release]; monsterHit = TRUE; Monster *monster = (Monster *)target; monster.hp--; if (monster.hp <= 0) { [targetsToDelete addObject:target]; [[SimpleAudioEngine sharedEngine] playEffect:@"splash.wav"]; _score ++; } break; } } for (CCSprite *target in targetsToDelete) { [_targets removeObject:target]; [self removeChild:target cleanup:YES]; } if (targetsToDelete.count > 0) { [ projectilesToDelete addObject:projectile]; } [targetsToDelete release]; if (_score > _oldScore) { _oldScore = _score; [_scoreLabel setString:[NSString stringWithFormat:@"score%d", _score]]; [[NSUserDefaults standardUserDefaults] setInteger:_oldScore forKey:@"score"]; _score = 0; } } - (void)update:(ccTime)dt { NSMutableArray *projectilesToDelete = [[NSMutableArray alloc] init]; CGRect projectileRect = CGRectMake( projectile.position.x - (projectile.contentSize.width/2), projectile.position.y - (projectile.contentSize.height/2), projectile.contentSize.width, projectile.contentSize.height); BOOL monsterHit = FALSE; NSMutableArray *targetsToDelete = [[NSMutableArray alloc] init]; for (CCSprite *target in _targets) { CGRect targetRect = CGRectMake( target.position.x - (target.contentSize.width/2), target.position.y - (target.contentSize.height/2), target.contentSize.width, target.contentSize.height); if (CGRectIntersectsRect(projectileRect, targetRect)) { CCParticleFire* explosion = [[CCParticleFire alloc] initWithTotalParticles:200]; explosion.texture =[[CCTextureCache sharedTextureCache] addImage:@"sun.png"]; explosion.autoRemoveOnFinish = YES; explosion.startSize = 20.0f; explosion.speed = 70.0f; explosion.anchorPoint = ccp(0.5f,0.5f); explosion.position = target.position; explosion.duration = 1.0f; [self addChild:explosion z:11]; [explosion release]; monsterHit = TRUE; Monster *monster = (Monster *)target; monster.hp--; if (monster.hp <= 0) { [targetsToDelete addObject:target]; [[SimpleAudioEngine sharedEngine] playEffect:@"splash.wav"]; _score ++; } break; } } for (CCSprite *target in targetsToDelete) { [_targets removeObject:target]; [self removeChild:target cleanup:YES]; } if (targetsToDelete.count > 0) { [projectilesToDelete addObject:projectile]; } [targetsToDelete release]; if (_score > _oldScore) { _oldScore = _score; [_scoreLabel setString:[NSString stringWithFormat:@"score%d", _score]]; [[NSUserDefaults standardUserDefaults] setInteger:_oldScore forKey:@"score"]; _score = 0; } The game overlayer .h file game over @interface GameOverLayer : CCLayerColor { CCLabelTTF *_label; CCSprite * background; int _score; int _oldScore; } @property (nonatomic, retain) CCLabelTTF *label; @end @interface GameOverScene : CCScene { GameOverLayer *_layer; } @property (nonatomic, retain) GameOverLayer *layer; @end .m file gameover #import "GameOverLayer.h" #import "HelloWorldLayer.h" #import "MainMenuScene.h" @implementation GameOverScene @synthesize layer = _layer; - (id)init { if ((self = [super init])) { self.layer = [GameOverLayer node]; [self addChild:_layer]; } return self; } - (void)dealloc { [_layer release]; _layer = nil; [super dealloc]; } @end @implementation GameOverLayer @synthesize label = _label; -(id) init { if( (self=[super initWithColor:ccc4(0,0,0,0)] )) { CGSize winSize = [[CCDirector sharedDirector] winSize]; self.label = [CCLabelTTF labelWithString:@"" fontName:@"Arial" fontSize:32]; _label.color = ccc3(225,0,0); _label.position = ccp(winSize.width/2, winSize.height/2); [self addChild:_label]; [self runAction:[CCSequence actions: [CCDelayTime actionWithDuration:3], [CCCallFunc actionWithTarget:self selector:@selector(gameOverDone)], nil]]; _score=0; }

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• How to get the location (x,y) of a CCLabel that is a child of a CCScene?

  - by RexOnRoids

  (learning Cocos2D) After creating a CCLabel and adding it to a CCLayer like this: //From HelloWorldScene.m // create and initialize a Label CCLabel* label1 = [CCLabel labelWithString:@"Hello" fontName:@"Marker Felt" fontSize:10]; label1.position = ccp(35, 435); // add the label as a child to this Layer [self addChild: label1]; How do I determine when a user has TOUCHED the label on the screen?

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• Learning AngularJS by Example – The Customer Manager Application

  - by dwahlin

  I’m always tinkering around with different ideas and toward the beginning of 2013 decided to build a sample application using AngularJS that I call Customer Manager. It’s not exactly the most creative name or concept, but I wanted to build something that highlighted a lot of the different features offered by AngularJS and how they could be used together to build a full-featured app. One of the goals of the application was to ensure that it was approachable by people new to Angular since I’ve never found overly complex applications great for learning new concepts. The application initially started out small and was used in my AngularJS in 60-ish Minutes video on YouTube but has gradually had more and more features added to it and will continue to be enhanced over time. It’ll be used in a new “end-to-end” training course my company is working on for AngularjS as well as in some video courses that will be coming out. Here’s a quick look at what the application home page looks like: In this post I’m going to provide an overview about how the application is organized, back-end options that are available, and some of the features it demonstrates. I’ve already written about some of the features so if you’re interested check out the following posts: Building an AngularJS Modal Service Building a Custom AngularJS Unique Value Directive Using an AngularJS Factory to Interact with a RESTful Service Application Structure The structure of the application is shown to the right. The  homepage is index.html and is located at the root of the application folder. It defines where application views will be loaded using the ng-view directive and includes script references to AngularJS, AngularJS routing and animation scripts, plus a few others located in the Scripts folder and to custom application scripts located in the app folder. The app folder contains all of the key scripts used in the application. There are several techniques that can be used for organizing script files but after experimenting with several of them I decided that I prefer things in folders such as controllers, views, services, etc. Doing that helps me find things a lot faster and allows me to categorize files (such as controllers) by functionality. My recommendation is to go with whatever works best for you. Anyone who says, “You’re doing it wrong!” should be ignored. Contrary to what some people think, there is no “one right way” to organize scripts and other files. As long as the scripts make it down to the client properly (you’ll likely minify and concatenate them anyway to reduce bandwidth and minimize HTTP calls), the way you organize them is completely up to you. Here’s what I ended up doing for this application: Animation code for some custom animations is located in the animations folder. In addition to AngularJS animations (which are defined using CSS in Content/animations.css), it also animates the initial customer data load using a 3rd party script called GreenSock. Controllers are located in the controllers folder. Some of the controllers are placed in subfolders based upon the their functionality while others are placed at the root of the controllers folder since they’re more generic:   The directives folder contains the custom directives created for the application. The filters folder contains the custom filters created for the application that filter city/state and product information. The partials folder contains partial views. This includes things like modal dialogs used in the application. The services folder contains AngularJS factories and services used for various purposes in the application. Most of the scripts in this folder provide data functionality. The views folder contains the different views used in the application. Like the controllers folder, the views are organized into subfolders based on their functionality:   Back-End Services The Customer Manager application (grab it from Github) provides two different options on the back-end including ASP.NET Web API and Node.js. The ASP.NET Web API back-end uses Entity Framework for data access and stores data in SQL Server (LocalDb). The other option on the back-end is Node.js, Express, and MongoDB.   Using the ASP.NET Web API Back-End To run the application using ASP.NET Web API/SQL Server back-end open the .sln file at the root of the project in Visual Studio 2012 or higher (the free Express 2013 for Web version is fine). Press F5 and a browser will automatically launch and display the application. Using the Node.js Back-End To run the application using the Node.js/MongoDB back-end follow these steps: In the CustomerManager directory execute 'npm install' to install Express, MongoDB and Mongoose (package.json). Load sample data into MongoDB by performing the following steps: Execute 'mongod' to start the MongoDB daemon Navigate to the CustomerManager directory (the one that has initMongoCustData.js in it) then execute 'mongo' to start the MongoDB shell Enter the following in the mongo shell to load the seed files that handle seeding the database with initial data: use custmgr load("initMongoCustData.js") load("initMongoSettingsData.js") load("initMongoStateData.js") Start the Node/Express server by navigating to the CustomerManager/server directory and executing 'node app.js' View the application at http://localhost:3000 in your browser. Key Features The Customer Manager application certainly doesn’t cover every feature provided by AngularJS (as mentioned the intent was to keep it as simple as possible) but does provide insight into several key areas: Using factories and services as re-useable data services (see the app/services folder) Creating custom directives (see the app/directives folder) Custom paging (see app/views/customers/customers.html and app/controllers/customers/customersController.js) Custom filters (see app/filters) Showing custom modal dialogs with a re-useable service (see app/services/modalService.js) Making Ajax calls using a factory (see app/services/customersService.js) Using Breeze to retrieve and work with data (see app/services/customersBreezeService.js). Switch the application to use the Breeze factory by opening app/services.config.js and changing the useBreeze property to true. Intercepting HTTP requests to display a custom overlay during Ajax calls (see app/directives/wcOverlay.js) Custom animations using the GreenSock library (see app/animations/listAnimations.js) Creating custom AngularJS animations using CSS (see Content/animations.css) JavaScript patterns for defining controllers, services/factories, directives, filters, and more (see any JavaScript file in the app folder) Card View and List View display of data (see app/views/customers/customers.html and app/controllers/customers/customersController.js) Using AngularJS validation functionality (see app/views/customerEdit.html, app/controllers/customerEditController.js, and app/directives/wcUnique.js) More… Conclusion I’ll be enhancing the application even more over time and welcome contributions as well. Tony Quinn contributed the initial Node.js/MongoDB code which is very cool to have as a back-end option. Access the standard application here and a version that has custom routing in it here. Additional information about the custom routing can be found in this post.

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• Add JS file on a certain page on Drupal

  - by Asaf

  I've got a JS file that I want to add to AdminAdd ContentCertain Content type After looking at template.php and checking out the function theme_preprocess_node I tried to add the JS through drupal_add_js(...) but no go. Now, I know that there's a similar question however my case is about adding a JS file to a certain page and nothing else (better seperation of JS files). Thanks. (Drupal 6)

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• node.js / socket.io, cookies only working locally

  - by Ben Griffiths

  I'm trying to use cookie based sessions, however it'll only work on the local machine, not over the network. If I remove the session related stuff, it will however work just great over the network... You'll have to forgive the lack of quality code here, I'm just starting out with node/socket etc etc, and finding any clear guides is tough going, so I'm in n00b territory right now. Basically this is so far hacked together from various snippets with about 10% understanding of what I'm actually doing... The error I see in Chrome is: socket.io.js:1632GET http://192.168.0.6:8080/socket.io/1/?t=1334431940273 500 (Internal Server Error) Socket.handshake ------- socket.io.js:1632 Socket.connect ------- socket.io.js:1671 Socket ------- socket.io.js:1530 io.connect ------- socket.io.js:91 (anonymous function) ------- /socket-test/:9 jQuery.extend.ready ------- jquery.js:438 And in the console for the server I see: debug - served static content /socket.io.js debug - authorized warn - handshake error No cookie My server is: var express = require('express') , app = express.createServer() , io = require('socket.io').listen(app) , connect = require('express/node_modules/connect') , parseCookie = connect.utils.parseCookie , RedisStore = require('connect-redis')(express) , sessionStore = new RedisStore(); app.listen(8080, '192.168.0.6'); app.configure(function() { app.use(express.cookieParser()); app.use(express.session( { secret: 'YOURSOOPERSEKRITKEY', store: sessionStore })); }); io.configure(function() { io.set('authorization', function(data, callback) { if(data.headers.cookie) { var cookie = parseCookie(data.headers.cookie); sessionStore.get(cookie['connect.sid'], function(err, session) { if(err || !session) { callback('Error', false); } else { data.session = session; callback(null, true); } }); } else { callback('No cookie', false); } }); }); var users_count = 0; io.sockets.on('connection', function (socket) { console.log('New Connection'); var session = socket.handshake.session; ++users_count; io.sockets.emit('users_count', users_count); socket.on('something', function(data) { io.sockets.emit('doing_something', data['data']); }); socket.on('disconnect', function() { --users_count; io.sockets.emit('users_count', users_count); }); }); My page JS is: jQuery(function($){ var socket = io.connect('http://192.168.0.6', { port: 8080 } ); socket.on('users_count', function(data) { $('#client_count').text(data); }); socket.on('doing_something', function(data) { if(data == '') { window.setTimeout(function() { $('#target').text(data); }, 3000); } else { $('#target').text(data); } }); $('#textbox').keydown(function() { socket.emit('something', { data: 'typing' }); }); $('#textbox').keyup(function() { socket.emit('something', { data: '' }); }); });

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• How to create a stand alone command line application with Node.js

  - by Fab

  I'm trying to find a way to use a command line nodejs application that I created on a computer without node.js installed. In other words how to package my application with node.js inside, in order to avoid the users to have node.js already installed. The tipical use case is: I run the application and the application works using the node core that is provide with the application (or the application checks if there is node.js installed, and if not it donwload and install it automatically). Do you have any idea?

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• Configure nginx for multiple node.js apps with own domains

  - by udo

  I have a node webapp up and running with my nginx on debian squeeze. Now I want to add another one with an own domain but when I do so, only the first app is served and even if I go to the second domain I simply get redirected to the first webapp. Hope you see what I did wrong here: example1.conf: upstream example1.com { server 127.0.0.1:3000; } server { listen 80; server_name www.example1.com; rewrite ^/(.*) http://example1.com/$1 permanent; } # the nginx server instance server { listen 80; server_name example1.com; access_log /var/log/nginx/example1.com/access.log; # pass the request to the node.js server with the correct headers and much more can be added, see nginx config options location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header X-NginX-Proxy true; proxy_pass http://example1.com; proxy_redirect off; } } example2.conf: upstream example2.com { server 127.0.0.1:1111; } server { listen 80; server_name www.example2.com; rewrite ^/(.*) http://example2.com/$1 permanent; } # the nginx server instance server { listen 80; server_name example2.com; access_log /var/log/nginx/example2.com/access.log; # pass the request to the node.js server with the correct headers and much more can be added, see nginx config options location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header X-NginX-Proxy true; proxy_pass http://example2.com; proxy_redirect off; } } curl simply does this: zazzl:Desktop udo$ curl -I http://example2.com/ HTTP/1.1 301 Moved Permanently Server: nginx/1.2.2 Date: Sat, 04 Aug 2012 13:46:30 GMT Content-Type: text/html Content-Length: 184 Connection: keep-alive Location: http://example1.com/ Thanks :)

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• With NVD3.js (nv.models.lineWithFocusChart), how do you set specific ticks on X-axis, when x values are dates?

  - by Panagiotis Panagi

  I'm using nv.models.lineWithFocusChart, where I'm showing some hourly measurements. So the x domain is dates. What I need is to show a tick per hour on X axis: 00:00 01:00 02:00 ... 24:00 I've tried everything I could find but nothing works. It seems that its easy to set specific ticks when values are not dates. But can't figure out how to do it for dates. Here's the code that creates the graph, if it can help: nv.addGraph -> chart = nv.models.lineWithFocusChart(view) chart.yAxis.tickFormat(d3.format(".02f")) d3.select(graphSelector).datum([]).transition().duration(500).call(chart) nv.utils.windowResize -> d3.select(graphSelector).call(chart) chart.xAxis.tickFormat (d) -> d3.time.format(ticksFormat)(new Date(d)) chart.x2Axis.tickFormat (d) -> d3.time.format(ticksFormat)(new Date(d)) chart.xAxis.tickSubdivide(9)

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• different small js files per page VS. 1x site-wide js file?

  - by Haroldo

  Different pages of my site have different js needs (plugins mainly), some need a lightbox, some dont, some need a carousel, some dont etc. With regards to pageloading speed should i option 1 - reference each js file when it is needed: so one page might have: <script type="text/javascript" src="js/carousel/scrollable.js"></script> <script type="text/javascript" src="js/jquery.easydrag.js"></script> <script type="text/javascript" src="js/colorbox/jquery.colorbox-min.js"></script> and another have: <script type="text/javascript" src="st_wd_assets/js/carousel/scrollable.js"></script> <script type="text/javascript" src="st_wd_assets/js/typewatch.js"></script> option 2 - combine and compress into one site_wide.js file: so each page would reference: <script type="text/javascript" src="js/site_wide.js"></script> there would be unused selectors/event listeners though, how bad is this? I would include any plugin notes/accreditations at the top of the site_wide.js file

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• Problem with migrating from Texture2D to CCTexture2D (Setting CCSprite texture)

  - by marie

  My problem is that whenever I change the texture of a sprite, the new texture will retain the size of the original sprite's texture. I have this code: mySprite = [CCSprite spriteWithFile:@"mySprite.png"]]; ... // change current stage here CCTexture2D *newTexture=[[[CCTexture2D alloc]initWithImage:[UIImage imageNamed:[NSString stringWithFormat:@"stage number %d.png",currentStageNumber]]]autorelease]; [mySprite setTexture:newTexture]; The new sprite is stretched or compressed depending on the size of the original sprite. If the original sprite is larger, the new texture is stretched. I didn't have this problem when I was using cocos2d v0.8 What am I doing wrong?

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• Sprite backgrounds

  - by Mattias Akerman

  I use cocos2d for iphone and in my game I'm using a sprite as static background image. I've noticed that when removing code for adding the sprite the framerate goes from ~30fps to over 40fps. Is it any other way to show a static background that is less expensive? I'm not moving the background sprite at all. To code right now: background = [Sprite spriteWithFile:@"t1_5.jpg"]; [self addChild:background z:0]; background.position = ccp(240, 160);

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• Is there a way to morph / convert a circular sprite into a square programmatically?

  - by John

  I have a sprite which is basically just an image of a circle and some content inside. Is there a way that I can programmatically stretch / distort it into something like: I don't care so much about the distortion. The original circular image is 100x100px, and the modified image should also be 100x100px. So its really the content that is being distorted. Can this be done using shaders or some other programmatic way ? The initial circular image is most likely determined at run time, which is why I need to programmatically convert the circular sprite to square. Please do not edit the tags, as the question applies to both versions of cocos2d (iPhone & x), and the solution will most likely work in both regardless of whether one uses C or C++ since the apis are similar, and OpenGL commands work similarly.

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• Can we use (id) in if- else condition ?

  - by srikanth rongali

  I have written my code in following way in cocos2d. id actionTo = [CCFadeOut actionWithDuration:4.0f]; id actionTo0 = [CCSequence actionWithDuration:2.0f]; if (m < enemyNumber) id actionTo1 = [CCCallFunc actionWithTarget:self selector:@selector(goToNextScene)]; else id actionTo1 = [CCCallFunc actionWithTarget:self selector:@selector(goToEndScene)]; id actionSeq = [CCSequence actions:actionTo, actionTo0, actionTo1, nil]; [targetE runAction: [CCSequence actions:actionSeq, nil]]; error: expected expression before 'id' I am getting the above error. Should not we use (id) in if condition ? I want to get called two selectors by using the if- else condition. How can I make it ? Thank You.

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• node.js ./configure warnings

  - by microspino

  I'm trying to install node.js and I get this list of warnings when I run ./configer. I don't know which libraries/packages I miss on my Debian installation (Linux 2.6.32.6 ppc GNU/Linux on a Bubba2 sever) Checking for gnutls >= 2.5.0 : fail --- libeio --- Checking for pread(2) and pwrite(2) : fail Checking for sync_file_range(2) : fail --- libev --- Checking for header sys/inotify.h : not found Checking for header port.h : not found Checking for header sys/event.h : not found Checking for function kqueue : not found Checking for header sys/eventfd.h : not found Can you tell me what I need to install?

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• History.js not working in Internet Explorer

  - by Wilcoholic

  I am trying to get history.js to work in Internet Explorer because I need history.pushState() to work. I have read over the instructions on GitHub (https://github.com/balupton/History.js/) and have tried implementing it, but havent had any success. Here's what I have <!DOCTYPE html> <html> <head> <!-- jQuery --> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script> <!-- History.js --> <script defer src="http://balupton.github.com/history.js/scripts/bundled/html4+html5/jquery.history.js"></script> <script type="text/javascript"> function addHistory(){ // Prepare var History = window.History; // Note: We are using a capital H instead of a lower h // Change our States History.pushState(null, null, "?mylink.html"); } </script> </head> <body> <a href="mylink.html">My Link</a> <a href="otherlink.html">Other Link</a> <button onclick="addHistory()" type="button">Add History</button> </body> Not sure what I'm doing wrong, but it's definitely not working in IE. Any help is appreciated

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• Smoothly drag a Sprite in cocos2d - iPhone

  - by Saurabh

  Hi All I have implemented a drag on a sprite object as follows.. -(BOOL)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch * touch = [touches anyObject]; CGPoint location = [[Director sharedDirector] convertCoordinate: [touch locationInView:touch.view]]; [diskSprite setPosition:ccp(location.x , location.y )]; return kEventHandled; } but this dragging is not smooth..... when i drag fast with my thumb the object left from the path. Thanks

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• Replacing image in sprite - cocos2d game development of iphone

  - by sagar

  I want to change the sprite image. Say for example. mainSprite=[Sprite spriteWithFile:@"redFile.png"]; [self addChild:mainSprite]; Here, Sprite is already added to a layer. I have mainSprite (pointer) which can access it. If I change [mainSprite setOpacity:150]; it works perfectly. But Here I want to change the sprite image instead of opacity. But Don't know how? Thanks in advance for helping me. Sagar

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• remote database connection with my iphone application using cocos2d

  - by Rana

  MCPResult *theResult; MCPConnection *mySQLConnection; //initialize connection string vars NSString *dbURL = @"192.168.0.16"; NSString *userName = @""; NSString *pass = @""; int port = 3306; //open connection to database mySQLConnection = [[MCPConnection alloc] initToHost: dbURL withLogin:userName password:pass usingPort:port]; if ([mySQLConnection isConnected]) { NSLog(@"The connection to database was successfull"); } else { NSLog(@"The connection to database was failed"); } //selection to database if([mySQLConnection selectDB:@"blackjack_DB"]) { NSLog(@"Database found"); } else { NSLog(@"Database not found"); } //selection to Table theResult = [mySQLConnection queryString:@"select * from test"]; //theResult = [mySQLConnection queryString:@"select * from test where id='1'"]; //theResult = [mySQLConnection queryString:@"select id from test"]; //theResult = [mySQLConnection queryString:@"select name from test where pass='main_pass'"]; NSArray *m= [theResult fetchRowAsArray]; NSLog(@"%@", m); NSLog(@"%@", [m objectAtIndex:2]); Use this code for connecting & receive information from remotedatabase. And also use some framework. AppKit.framework, Cocoa.framework, Carbon.framework, MCPKit_bundled.framework. But stile i didn't connect my application with remort database.

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• collision detection in cocos2d.

  - by seenu

  i want to detect collision detection two times in same row. for example:-(see the below image) the ellipse and rectangle or detcted. after that my ellipse will travelling in the straight line path to down and detect the another rectangle. first one is( travelled in trajectory path ) working fine. second one i want to pass in straight line to down for collision detection. how to do this process.

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• Cocos2D: Problem Rotating a CCMenu

  - by srikanth rongali

  If I try to do actions over menuItems but the actions are not running as expected. I think code below should make the menuItem rotate by 90 degrees but when I run it, the menuItem translates from its coordinates to another coordinate then returns to its original coordinate. The complete translation takes 3 seconds. What I need is for the menuItem to rotate by 90 degrees in place within a 3 seconds duration. Please explain where I have done wrong? CCMenuItemImage *targetE;//Globally declared CCMenu *menu;//Globally declared -(id)init { if( (self = [super init]) ) { isTouchEnabled = YES; CGSize windowSize = [[CCDirector sharedDirector] winSize]; targetE = [CCMenuItemImage itemFromNormalImage:@"grossinis_sister1.png" selectedImage:@"grossinis_sister1.png" target:self selector:@selector(touch:)]; menu = [CCMenu menuWithItems:targetE,nil]; id action4 = [CCRotateBy actionWithDuration:3.0 angle:90]; [menu runAction: [CCSequence actions: action4, nil]]; menu.position = ccp(windowSize.width/2 + 200, windowSize.height/2); [self addChild: menu z:10]; } return self; } @end Thank You.

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• Good way to make animations with cocos2d?

  - by Johnny Oin

  Hi there, I'm making a little iphone game, and I would get some clues. Let's imagine: Two background sprites moving pretty fast from right to left, and moving up and down with accelerometer. I guess I can't use animations here, cause the movement of the background is recalculated at each frame. So I use a schedule with an interval of 0.025s and move my sprites at each clock with a : sprite.position = ccp(x, y); So here is my problem: the result is laggy, with only these two sprites. I tried both declaring sprites in the header, and getting them with CCNodes and Tags. It's quite the same. So if someone can give me a hint on what is the best way to do that, that would be so nice. I wonder if the problem can't be the fact that sprites are moving very fast, but i'm not sure. Anyway, thanks for your time. J.

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• Rotating a cocos2d sprite on an anchor point outside of the sprite

  - by user309030

  Currently the setanchor function only sets the anchor within the sprite frame. Is there any (easier) wway to change the anchor point to a coordinate on screen space? My purpose is to allow the sprite to rotate around a circle. TIA for any suggestions made.

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• use more then one sound in my iphone application using cocos2d

  - by Rana

  avc = [[MPAVController sharedInstance] avController]; //avc is AVController NSString *path = [[NSBundle mainBundle] pathForResource:@"Sound" ofType:@"wav"]; id feeder = [[MPArrayQueueFeeder alloc] initWithPaths:[NSArray arrayWithObject:path]]; [avc setQueueFeeder:feeder]; [avc play:nil]; [feeder release]; NSTimer *sound = [NSTimer scheduledTimerWithTimeInterval:(9.0) target:self selector:@selector(Gamesoundplay) userInfo:nil repeats:YES]; Hear i use tow framework for playing sound. 1. MediaPlayer.framework 2. AudioToolbox.framework I success to play the background sound with repeat after lodding the game. I also want to play sound after clicking some button action without stop the previous background sound.But when i click the other button that time background sound is stop and start again after time intereval ( 9.0 sec ) which i mention for repeated the sound time line. If anyone do this work then help me to complete my application.

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