This Kobold2D FAQ article explains the difference between Corona SDK and iPhone Wax library, and evaluates the existing and future options for Lua scripting in Kobold2D.
A new episode of the Cocos2D Podcast is now live. This time we’re joined by Daniel Sperl, author of the Sparrow Framework Objective-C game engine for iOS which is based on the ActionScript (Flash) API design.
Note: the Sparrow website is currently reported as “possibly malware” by Safari and Google. The culprit has been removed and the site is safe to visit. Read this blog post for more info about what happened.
Daniel has a secret he shared with us even though he couldn’t really say any details until the official announcement in a few weeks. Cocos2D also gets a couple honorable (or dishonorable) mentions as we compare it with Sparrow Framework, and come to the conclusion that documentation-wise it is leaps and bounds ahead of Cocos2D.
Cocos2D Podcast: Daniel Sperl (Sparrow Framework Developer)
Previous Cocos2D Podcast: Marketing your App
I forgot to blog about the previous Cocos2D Podcast in which Azam and I talk about marketing your iPhone app.
Cocos2D Podcast: Marketing your iPhone App
Unrelated but important: Steve Jobs resigns
In case you haven’t heard, Steve Jobs has resigned as CEO of Apple on August 24th, 2011. Here’s Steve’s (short and to the point) letter to the Board of Directors. Tim Cook was named as his successor. Read the press release.
I never really cared for who’s boss of a big company, just enough to get the ridicule. But Steve Jobs leaving .. I can’t help but feel sad.
I believe this is for one reason in particular: very, very few CEOs actually have a vision and follow it through. Or have the (will)power to follow it through without being bent or influenced through challenges and oppositions by corporate and outside politics. Steve was able to retain all of the drive, dedication and willpower that you have when you just start out as a company or individual trying to make a really great product that you believe in and want to be proud of.
Most large companies are simply unable to create such products because too many people work on each product, and there’s lots of money and risk involved in the process which, more often than not, turns potentially great companies into conservative, boring companies making lackluster products, following consumer trends. Apple under Steve Jobs has been the exception. Steve has repeatedly anticipated consumer trends, even created them through the power that is the Apple brand.
The really, really sad part however is what hasn’t been said. Steve being unable to meet his duties paints a grim outlook on his health. Not mentioning his health in his letter and Apple’s press release even more so. I just wish for him that it’s not as bad as one can imagine it to be if it forces someone of Steve’s caliber to resign from his position. Good luck and all the best, Steve!
Kobold2D is well and alive. Actually so much so that I thought: “Hey, it’s crazy, but maybe not … I’ll give it a shot and see how far I get.”
The thought was to try and add the cocos2d-x engine (cocos2d in C++) together with the Hello World example project to the Kobold2D workspace. The result: it took about 90 minutes, most of that figuring out the correct build settings and header search paths. And it just worked.
Surprise! 
Right now this is just the iOS version. A cocos2d-x Mac project will be added as soon as the Mac platform is officially supported by cocos2d-x (or does it already and I missed that?). Then developers would have the choice between using either Objective-C or C++ as the primary language for developing their iOS & Mac OS X games.
It also made me think: “Hey, there’s this other open source 2d game engine … hmmm….” 
I took some time to research the various ports which carry the Cocos2D name or are Cocos2D in spirit if not by name. The following list is – to the best of my knowledge and at the time of writing – complete and accurate. I counted a total of eight ports.
The dates are based on the earliest public record I was able to find. Of course the project might have been in development for longer, but not publicly or not where I’ve been looking (mostly google code and github). I usually checked the source code commit history, the first issue being tracked, the first post made on the forum or wiki, the history of downloadable files, and similar things. The list is sorted by date of inception. Underneath you’ll find my analysis of the state of the Cocos2D game engines, as I perceive it, and I try an outlook into the future.
The Complete List of Cocos2D Game Engines
Cocos2D
Language: Python
Platform(s): Mac OS, Windows, Linux
Around since: March 2008
Latest update: September 2010
Cocos2D for iOS
Language: Objective-C
Platform(s): iOS Devices, Mac OS X
Around since: June 2008
Latest update: November 2010 (Latest Stable: July 2010, Latest Commit: December 2010)
ShinyCocos
Language: Ruby
Platform(s): iOS
Around since: April 2009
Latest update: April 2010
CocosNet
Language: C#
Platform(s): iOS (MonoTouch)
Goal: to also support other .NET platforms like Windows, Windows Phone and Xbox 360
Around since: October 2009
Latest update: September 2010
Cocos2D for Android
Language: Java
Platform(s): Android
Versions: cocos2d-android (code on github), active branch: cocos2d-android-1 (code on github)
Notable: cocos2d-android-1 was branched off of cocos2d-android in October 2010 because some developers were dissatisfied with its slow progress. Apparently source code commits had stopped in June.
Around since: January 2010
Latest update: June 2010 (cocos2d-android), December 2010 (cocos2d-android-1)
Cocos2D for Windows
Language: C++
Platform(s): Windows, Windows Mobile
Notable: this project was apparently short-lived. One big code push, one blog post, no updates since, neither code nor blog or anything else. I believe we can consider this port dead, especially in light of Cocos2D-X.
Around since: April 2010
Latest update: May 2010
Cocos2D for Web
Language: Javascript
Platform(s): Web Browsers
Website with online demo: http://cocos2d-javascript.org/
Around since: June 2010
Latest update: December 2010
Cocos2D X
Language: C++
Platform(s): iOS, Android, uPhone, Win32, others
Notable: although the project started in July 2010 (from what I can tell) the project was not widely known until November 13th by announcing it on Twitter.
Around since: July 2010
Latest update: December 2010
The State of Cocos2D Game Engines
In my opinion, we currently have only two serious contenders: Cocos2D for iOS and Cocos2D X.
The former has a history of regular updates for over 2.5 years and a strong community, the latter is growing fast because there’s a whole team behind it which is sponsored/financed by China Unicom. If I extrapolate what has happened in recent months with these two game engines, I’m convinced that rather sooner than later Cocos2D X will be on par or overtaking Cocos2D for iOS in terms of maturity, stability and general applicability. You just have to consider a team of paid (?) developers vs. (for the most part) a single developer, and my guess is they don’t have a problem with and may even be supportive of 3rd party commercial add-on products. I do agree that Cocos2D for iOS will remain the most interesting platform for beginning developers, developers with a strong background in Objective-C programming and those who simply don’t want to take their games and apps to multiple platforms. For everyone else: keep a close eye on Cocos2D X. It certainly had a lot of developer’s eyebrows raised.
There’s one strong follow-up and that is Cocos2D for Web (cocos2d-javascript). Frequently updated and in a well protected niche that can’t be covered by the aforementioned Cocos2D versions. Plus, and this is freaky, you could even make web-based Cocos2D games that also run on the iPhone’s browser – think of the opportunities! It’s iRepetetiveWebBasedGameMakingTonsOfMoney time. Just kidding, except that I’m not. I think Cocos2D for Web stands a good chance at becoming relatively popular and seeing actual use, and with continued and relatively frequent updates this might be happening over the course of 2011. Keep at it!
Cocos2D (Python), the grandparent, is a niche project and it’ll remain a niche project. Too long has it been a niche, too seldom do we see updates, too low is its version number still (v0.4 after 2.5 years), too little interest is there in general for entirely Python based game engines, too strong are the contenders both from the same language (specifically PyGame) as well as most other game engines with a focus on 2D games. The same goes for ShinyCocos – who would want to write iPhone games in Ruby? Don’t kill me, I know you’re out there, but you have to admit that you’re just a little too freaky for your own good. 
Cocos2D for Android and CocosNet are both ports I wish I could believe in, but I don’t just yet. For the former, the recent branch has made it more interesting and actively supported, but who knows for how long? And then there’s Cocos2D X which takes some wind out of both, but especially the Android version. Unless you’re Java-esque through and through. For CocosNet I wish it’ll one day reach its goal and hopefully be based on or ported to the XNA platform, and not Mono (yikes!), so that we can write Cocos2D games for the Xbox 360, Zune, Windows and Windows Phone 7 and publish them through/on Microsoft’s AppHub. That would rock! Count me in if that ever happens.
Which leaves Cocos2D for Windows. This is a project that’s so typical of a certain type of open source projects. I dub these occurrences “open source dumps”. It’s literally some programmer coming out of his apartment after months of hard work, telling the world “Hey guys, look, I’m bringing my trash out!”. Except that the trash is actually quite interesting, yet it’s incomplete, unfinished and de facto unusable so it stays in the trashbin and everyone stopping by and taking a sniff is going “Ewwwww!!!”. Well, and said developer goes back to his apartment, probably working on his next trash dump. If we’re lucky, it’ll be an update to the former project – but by the time the second update appears, most developers with an interest have lost faith in the project. But more often than not, we’ll never see or hear of this developer again. In other words: Cocos2D for Windows was practically dead the day it started. And now with Cocos2D X I seriously doubt we need it anymore. It’s a shame.
Add your link to the Cocos2D Linkvent Calendar
Do you have something to share with the Cocos2D community? I haven’t received enough submissions to fill all the days until Xmas, although I do have enough links to post one each day, I’d rather post a link to your website or blog post.
Chapter 4 – First Simple Game
After Chapter 3 covered the fundamentals of the cocos2d game engine, this chapter will put to use what you’ve learned. The simple game is all about droping enemies that you have to avoid via accelerometer controls. Sort of like an inverse Doodle Jump. But it’s not just about the gameplay itself, I want the game to be reasonably complete with a main menu, scene transitions, game over and of course audio.
The chapter will be submitted on Friday, July 23rd.
Do you have any suggestions for the game?
What do you think should be in a first cocos2d game? Let me know!
Summary of working on Chapter 3 – Essentials
When I started the chapter I wasn’t really sure about its focus and progress was a little slow. Eventually it clicked and I found myself ending up having written more pages than needed and still having a great number of things left untold. The key was looking at the cocos2d API reference documentation and remembering what it was like when I was a beginner. Sure, every class, method and property is there but for a beginning cocos2d developer the API reference is just a huge list of names. In other words, if your experience was or is anything like mine was, it’s frustrating to work with the API reference.
I ended up writing about the cocos2d engine design and its scene graph first, the remaining 80% of the chapter explain in detail with lots of code samples how to use those darn CCNode classes. All the important ones are covered: CCNode, CCScene, CCLayer, CCSprite, CCLabel, CCMenu, CCMenuItem* as well as the Director, Transitions and Actions. Besides the code samples and how-to I’ve added numerous caveats, common mistakes, best practices and other nodes which are so very much needed to make any documentation complete.
For example, how Layers are best used for grouping other nodes together and of course how to enable touch and accelerometer input by adding the required functions which aren’t mentioned in the API reference since they are part of the iPhone SDK API. There’s also some weird recommendation floating around not to use too many Layers because they’re slow. I can’t find the source but what I did find was that this is only true if the Layers enable touch or accelerometer input, because that’s what costs a lot of performance. So what you don’t want to have is several layers accepting input, otherwise use as many Layers as you need – which shouldn’t be many anyway. And if you do need multiple Layers accepting input, why not just use one master Layer (possibly using a Targeted Touch handler) which forwards the input events appropriately to the other Layers?
Line-Drawing Game Starterkit
Site License! Unlimited Apps!Royalty Free! No Attribution!60 day money-back guarantee!
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All Starterkit project artwork provided by Arezou Ipakchi Design. Promotional images created by Justin from CartoonSmart.
What it is:
Get a head-start for your Line-Drawing game and save days if not weeks of your time! You’ll get gameplay code modelled after the extremely popular Flight Control game. You’ll learn how to draw lines, detect touches on objects, have objects follow a path – and much, much more! Written by a professional game developer and game industry veteran (me) the source code is annotated with lots of comments explaining my rationale and written with readability in mind.
Contains both iPhone & iPad versions!
The Starterkit compiles to both iPhone and iPad devices natively using the same code. If the iPad Target is selected hi-res iPad images will be used. Image selection is done automatically by loading those images whose filenames have the “-ipad” suffix.
What others are saying:
“Code is quite clearly written and decently documented [...] definitely a fine investment.”
From: Commercial cocos2d Code review from Alex Curylo.
“It was an awesome moment when I found the source for a line draw game of this caliber.”
-Franklin Lyons, SpinFall
“Especially the path and movement system is saving me lots of headaches.”
-Martin Hoffmann
Games made with this Starterkit:
Launch Control
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Ferries HD
Feature List:
- clearly seperated and well-structured GameScene code design with a minimum of dependencies
- easy to add new objects and extend object parameters
- assertive coding style to help catch coding errors early on
- touch object & draw a path for it (whether it’s already following a path or not)
- path drawing ends when path is drawn over appropriate target location (eg airstrip for airplanes, respecting angle of approach)
- path drawing ends when arbitrary point limit is exceeded (to avoid slowdowns)
- path is drawn when dragged with thick transparent line style like Harbor Master, without glitches
- path is split into equal length pieces no matter how quickly user moves finger
- objects spawn outside screen, locations can be re-defined and extended
- objects display incoming warning marker at screen border
- objects display collision warning when any two of them are getting too close
- objects follow path to end – then fade out and increase score or continue moving
- objects always rotate in movement direction
- objects bounce back at screen borders
- motivational Labels for successful landings, precached
- Score and HighScore Labels
- HighScore saved to disk between play sessions
- supports both Landscape orientations with autoflip
- loads correct resource files depending on Target (iPhone or iPad)
- proper Pause handling for incoming calls, SMS
- Many generally useful Math Helper functions included
- Lots of comments explaining rationale and giving tips for improvement
- Fully documented
- Uses the professional Xcode Project from my Tutorial (Feature List)
- includes both iPhone/iPod Touch and iPad versions using seperate Targets, same codebase
- uses and includes cocos2d v1.0.1
- compatible with iOS 3.x, 4.x and 5.x
- compatible with Xcode 3.2 and Xcode 4.x
- easy setup, just unzip and use – no Xcode project setup required
Questions? Need Help?
Go to the support forum for the Line-Drawing Game Starterkit on Cocos2D Central.
Note: the Line-Drawing Starterkit support forum is a public forum. In case you need to post sections of code from the starterkit I’d appreciate it if you kept them short and to the point.
Legal Disclaimer
Cocos2D is a registered trademark of Ricardo Quesada. Steffen Itterheim, the Learn & Master Cocos2D website and the Line-Drawing Game Starterkit are neither affiliated with nor endorsed by Zynga or Ricardo Quesada.
Try Before Buy!
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Demo App for iPhone
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Buy Now!
Site License! Unlimited Apps!Royalty Free! No Attribution!60 day money-back guarantee!
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License Agreement
Copyright
Purchase grants you the License to use and modify the source code and assets under the following Terms and Conditions:
You are not allowed to make the source code publicly available. You are not allowed to give or sell the source code to others, modified or not. Licenses are not transferable.
All Licenses are royalty free. You can make as many free or commercial Apps using the source code as you want. You may re-use any existing assets in your App.
If you do contract work and have or want to give the Starterkit source code to your client, your client needs to purchase a Site License as well.
Site License
Each purchase grants you a Site License. The Site license grants you the use of the Starterkit without restrictions at one site.
A site is an office, building or living space rented or owned by the company or individual making the purchase. It allows anyone working on site to use and modify the Starterkit source code.
Large companies operating at several sites need to purchase a site license for each individual location if the Starterkit is to be used at multiple locations. Contact me if you’re such a corporation and you prefer a flat fee license with your own license text to go along with it.
Support
Updates to the Starterkit are done on an as needed basis. I will also keep it up to date and running with the latest stable releases of cocos2d. Updates are distributed via a download link sent to the email address you used for your order. If your email address ever changes please contact me, ideally you should forward me your order confirmation in that case to speed up the change.
Source Code not covered by this License
The licensed Source Code project contains files which are available for free and are governed by different licenses. The Terms & Conditions outlined here do not apply to source code files which do not contain the Copyright notice “Copyright (year) Steffen Itterheim. All rights reserved.”.
Disclaimer
THIS SOFTWARE IS PROVIDED “AS IS” AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Questions? Contact me!
If you have any questions or if you require specific License texts before making a purchase, please contact me.
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