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  • Cocos2D - Detecting collision

    - by Grace
    I am a beginner in cocos2d and im facing a problem with detecting collision for my coins. Sometimes it works sometimes it doesn't. So basically, im creating a game which the user (ship) have to avoid the obstacles and collect coins on the way. The collision of the obstacle works well but not for the coins. I was thinking maybe the loops for creating many coins is the problem but im not sure. Can anyone help? My codes: - (void)update:(ccTime)dt{ double curTime = CACurrentMediaTime(); if (curTime > _nextBridgeSpawn) { float randSecs = [self randomValueBetween:3.0 andValue:5.0]; _nextBridgeSpawn = randSecs + curTime; float randX = [self randomValueBetween:50 andValue:500]; float randDuration = [self randomValueBetween:8.0 andValue:10.0]; CCSprite *bridge = [_bridge objectAtIndex:_nextBridge]; _nextBridge++; if (_nextBridge >= _bridge.count) _nextBridge = 0; [bridge stopAllActions]; bridge.position = ccp(winSize.width/2, winSize.height); bridge.visible = YES; [bridge runAction:[CCSequence actions: [CCMoveBy actionWithDuration:randDuration position:ccp(0, -winSize.height)], [CCCallFuncN actionWithTarget:self selector:@selector(setInvisible:)], nil]]; this is where i declare my coins (continued from the update method) int randCoin = [self randomValueBetween:0 andValue:5]; _coin = [[CCArray alloc] initWithCapacity:randCoin]; for(int i = 0; i < randCoin; ++i) { coin = [CCSprite spriteWithFile:@"coin.png"]; coin.visible = NO; [self addChild:coin]; [_coin addObject:coin]; } float randCoinX = [self randomValueBetween:winSize.width/5 andValue:winSize.width - (border.contentSize.width *2)]; float randCoinY = [self randomValueBetween:100 andValue:700]; float randCoinPlace = [self randomValueBetween:30 andValue:60]; for (int i = 0; i < _coin.count; ++i) { CCSprite *coin2 = [_coin objectAtIndex:i]; coin2.position = ccp(randCoinX, (bridge.position.y + randCoinY) + (randCoinPlace *i)); coin2.visible = YES; [coin2 runAction:[CCSequence actions: [CCMoveBy actionWithDuration:randDuration position:ccp(0, -winSize.height-2000)], [CCCallFuncN actionWithTarget:self selector:@selector(setInvisible:)], nil]]; } } this is to check for collision (also in the update method) for (CCSprite *bridge in _bridge) { if (!bridge.visible) continue; if (CGRectIntersectsRect(ship.boundingBox, bridge.boundingBox)){ bridge.visible = NO; [ship runAction:[CCBlink actionWithDuration:1.0 blinks:5]]; } } } //this is the collision for coins which only work at times for (CCSprite *coin2 in _coin) { if (!coin2.visible) continue; if (CGRectIntersectsRect(ship.boundingBox, coin2.boundingBox)) { NSLog(@"Coin collected"); coin2.visible = NO; } } } Thank you.

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  • Linux on 8-bit

    - by nospam(at)example.com (Joerg Moellenkamp)
    This is nothing short of extremly cool from a technical perspective. The author has done it by writing an ARM emulator for an AVR controller and running Linux with this emulation : Linux on an 8-bit micro?.This is definitely not the fastest, but I think it may be the cheapest, slowest, simplest to hand assemble, lowest part count, and lowest-end Linux PC. The board is hand-soldered using wires, there is not even a requirement for a printed circuit board

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  • How do I fix the paths of my website?

    - by EASI
    I have Joomla 2.5.7 in my client's server updated recently from 1.6 to 1.7. I did not make that site but I am responsible for it now. I prefer to make a site from zero. Now users area clicking on the menu options and when joomla send them to a meta-url like http://iap.pa.gov.br/acervo they get the message 404 The requested URL /acervo was not found on this server. Would that be because they moved joomla folder from the root to root/iap (name of the site)? If it is, what is the configuration to adapt to that new folder?

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  • How do I duplicate a Box2d simulation, mid-simulation?

    - by Whyte
    I want to serialize the state mid-game, send it over the network to an identical computer (same CPU, same OS, same binary), load it there, and have the two games run in tandem doing the exact same simulation, without one of them drifting off and going haywire. In short: I want pop-in, pop-out networking support on my HIGHLY physics-intensive game, where sending object coordinates every few seconds is impossible, due to having thousands of objects, and many clients. I tried this with Box2D, and saving an object's location/velocity/etc wasn't enough... there's internal state that's not accessible through any public methods. My current workaround is to force EVERY client to save its entire worldstate and reload it from scratch, whenever a new player connects... but this is obviously bad practice, because it hangs the game for everyone whenever someone new connects. However, it works, with zero desynchronization. So, anyone know of any other techniques that can help me? Or should I just kiss my project goodbye?

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  • Are SEO Packages a Good Investment?

    When you own a website, your primary focus is to attract a constant flow of new (organic) traffic. You will likely have a set of established, returning visitors whom you can count on to make purchases, but the success of any company is marked by its growth. When you are seeking to make your website bigger, better, or more popular, the simple fact is that you need more visitors.

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  • Can't open any of my drives/devices(not USB drive)

    - by Anontu
    I can't open any of my computer drives (:c/,:d/.....) Every time i tried to open the drives, the following notice appeared: (i'm new in Ask Ubuntu,so,i can't upload the snapshot,i need 10 reputations to do that) **Unable to access "__ Volume"** error mounting/dev/sda7at/media/MyPC/__Volume:Command-Line 'mount-t "ntfs"-o "uhelper=udisk2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177""/ dev/sda7""/media/MyPC/__Volume"' exited with non-zero exit status 14:The disk contains an unclean file system (0,0).| Metadata Kept in Windows cache,refused to mount. Failed to mount '/dev/sda7':Operation not permitted The NTFS partition is in an unsafe state.Please,resume and shutdown Windows fully(no hibernation or fast restarting),or mount the volume read-only with the 'ro' mount option. I have Windows side by side Ubuntu 13.04 in my computer and i have done (like-Shutting down Windows properly...) things as these in the notice. But it's not working.

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  • Should I use XNA (C#) or Java to create a basic game engine?

    - by Xboxking
    My project is to design and build a game engine (in just about 3 months). I've been looking at two options for this game engine, either make it with XNA (and C#) or Java. My experience with XNA/C# is zero to none, however I have been a Java programmer for around 4 years. I've had a little play around with both but I am still not sure what would be best to use (i.e. what would turn out better with my experience). XNA is obviously for making games and I would presume making a game engine would be slightly easier in this - however that said, there are numerous libraries available in Java that could be used for a game engine (such as lwjgl). What would be my best option and ideally produce the best results out of both XNA or Java? For your information, the game engine at the moment is a 2D one and is not too advanced (although I plan to extend it in the future). Thanks in advance for all answers!

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  • A quick look at: sys.dm_os_buffer_descriptors

    - by fatherjack
    SQL Server places data into cache as it reads it from disk so as to speed up future queries. This dmv lets you see how much data is cached at any given time and knowing how this changes over time can help you ensure your servers run smoothly and are adequately resourced to run your systems. This dmv gives the number of cached pages in the buffer pool along with the database id that they relate to: USE [tempdb] GO SELECT COUNT(*) AS cached_pages_count , CASE database_id ...(read more)

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  • Unity, Unrealistic Sphere On Inclined Plane

    - by user1086516
    So I am trying to model a ball rolling down an inclined surface in Unity based on what I am observing in real life but it is still quite off. In Unity it takes the ball about 3 seconds to travel from a place to another specified place where in real life it only takes 1 second. The ball isn't as fast to react to the incline as in real life (even though I have tried giving the ball and surface low or zero friction values) The ball does not accelerate as nearly as fast as it does in real life What do I do to give the ball more realistic behavior ? I have tried messing around with mass, physics materials, drag, and angular drag on the ball and surface but it doesn't seem to be helping.

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  • I cannot log in after theme change

    - by sssuizaaa
    After changing the gtk-theme in the gnome tweak took I was taken out of the session to the login screen and now I cannot log in. I can only log in using the guest account. So in the grub menu I selected the recovery mode and in the resulting menu I selected root-drop to root shell prompt. Once there I did a couple of things I've found in several pages and in the forums. 1.gsettings reset org.gnome.desktop.interface gtk-theme This is what I got: (process:642):WARNING: Command line 'dbus-launch –autolunch=4438d024dd45ef7fb2d3f4ab0000000f –binary-syntax --close-stderr' exited with non-zero exit status 1: Autolaunch error: X11 initialization failed.\n and nothing changes 2.gconftool-2 --type=string -s /desktop/gnome/interface/gtk_theme Radiance with this I was trying to change the gtk theme to the Radiance one. No strange message this time but it did not work either. I still cannot log in. Any ideas please?? sssuizaaa

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  • Amazon sort le SDK AWS pour PHP 2, une version récrite entièrement à partir de PHP 5.3 pour optimiser l'accès à ses services Cloud

    Amazon sort le SDK AWS pour PHP 2 une version entièrement récrite à partir de PHP 5.3 pour optimiser l'accès à ses services Cloud Amazon vient de publier la nouvelle version du SDK AWS (Amazon Web Service) pour PHP. Le SDK AWS pour PHP permet aux développeurs utilisant le langage de créer des applications pouvant exploiter les services de la plateforme Cloud dont DynamoDB, Amazon Simple Storage Service (Amazon S3), Amazon Glacier et Amazon CloudFront. Le nouveau SDK AWS a été entièrement reconstruit à partir de zéro, pour tirer pleinement parti de PHP 5.3 et prendre en compte les recommandations de PHP Framework Interop Group's.

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  • Authentication error when trying to upgrade from 11.10 to 12.04

    - by mahmuodmasri
    I wrote : ~$ do-release-upgrade and the system says: Checking for a new ubuntu release Get:1 Upgrade tool signature [198 B] Get:2 Upgrade tool [1551 kB] Fetched 1551 kB in 6s (167 kB/s) extracting 'precise.tar.gz' authenticate 'precise.tar.gz' against 'precise.tar.gz.gpg' exception from gpg: GnuPG exited non-zero, with code 2 Debug information: gpg: Signature made Thu 11 Oct 2012 07:47:10 AM EET using DSA key ID 437D05B5 gpg: can't open `/etc/apt/trusted.gpg' gpg: keydb_search failed: file open error gpg: Can't check signature: public key not found Authentication failed Authenticating the upgrade failed. There may be a problem with the network or with the server. Please help me!

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  • Collisions and Lists

    - by user50635
    I've run into an issue that breaks my collisions. Here's my method: Gather Input Project Rectangle Check for intersection and ispassable Update The update method is built on object_position * seconds_passed * velocity * speed. Input changes velocity and is normalized if 1. This method works well with just one object comparison, however I pass a list or a for loop to the collision detector and velocity gets changed back to a non zero when the list hits an object that passes the test and the object can pass through. Any solutions would be much appreciated. Side note is there a more proper way to simulate movement?

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  • Search Engine SEO - Link Baiting

    Search engine Optimization (SEO) is crucial to achieving a high position in search engine results. One of the ways in which search engines assess the usefulness of your site is to count how many websites are linking to your content. Link baiting involves creating content that people will want to link to.

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  • SEO Software Reviews - Page Speed

    Well they finally went and did it, at last Google has made the announcement that they are now going to count site speed as one of their official page ranking factors. There are hundreds of site rank factors that Google uses and now your page speed will be one of them.

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  • Signs of a Quality SEO Link Building Service

    The most valuable links are those with the nofollow attribute, with keywords in anchor text and which are placed on high authority pages with similar content. Of course, other links also count. You should never focus only on search engines.

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  • Optimising For Google and Bing - How Distinct Are They?

    With Bing and Yahoo set to combine soon enough, the Bing search engine will probably count for near to 30% of the search engine business, this means it could be somewhat beneficial to optimise for both Bing and Google in the not too remote future. Now that does not really entail that you ought to implement tremendous modifications to the optimisation approaches you presently use, as an evaluation by SEOmoz reveals that the two engines appear to be growing to be increasingly more similar.

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  • A quick look at: sys.dm_os_buffer_descriptors

    - by fatherjack
    SQL Server places data into cache as it reads it from disk so as to speed up future queries. This dmv lets you see how much data is cached at any given time and knowing how this changes over time can help you ensure your servers run smoothly and are adequately resourced to run your systems. This dmv gives the number of cached pages in the buffer pool along with the database id that they relate to: USE [tempdb] GO SELECT COUNT(*) AS cached_pages_count , CASE database_id ...(read more)

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  • Second monitor stopped working

    - by Mark D
    After setting up 11.10 today, I seem to be having problems with my dual monitor set up. It worked without issues in Mint but today after I switched to 11.10 only one monitor seems to function. This seems a little odd to me. During setup both monitors functioned without issue, although they were mirroring each other both monitors but as soon as it booted into Unity my secondary monitor stopped working. I checked under settings-display and the second monitor doesn't seem to even be detected. On the off chance it had something to do with drivers, I upgraded the proprietary drivers to the latest version with zero success. If anyone has any ideas, I'd love to hear them.

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  • Problem Installing Ubuntu on nexus 7

    - by jdl117
    Well, a good chunk of my day has been spent on what was supposed to take minutes... here's the rundown every time, i get stuck while flashing the root file system (freezing, timing out, or error message) i seemingly followed all of the steps and troubleshoots, and repeated them, no such luck. i would not count it out that i still messed one of them up, but does anyone have any ideas? on a side note while i am posting something, anyone know if android bluetooth keyboards play nicely with this ubuntu? i would guess not

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  • 3 Benefits of Multiple C Class Hosting

    Multiple C Class hosting has become an essential tool for marketers striving to have their websites rank highly in the search engines. The ability to interlink websites while having search engines actually count rather than discount the links is invaluable. What are the benefits of Multiple C Class hosting? Read on to find out.

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