Gosu Forums - Gosu on iPad, iPhone & iPod Touch

Gosu + RubyMotion?

shawn42 — Thu, 20 Dec 2012 17:56:03 GMT

This looks like a more "RubyMotion" approach that may give us some better performance than ruboto: https://github.com/headius/fastruby

So how well is gosu doing for iOS development?

erisdiscord — Mon, 08 Oct 2012 20:12:08 GMT

It's AAC or nothin'.

So how well is gosu doing for iOS development?

Maverick — Mon, 08 Oct 2012 19:17:33 GMT

What's the free alternative to OGG files then?

So how well is gosu doing for iOS development?

jlnr — Thu, 27 Sep 2012 23:33:48 GMT

Resolution selection is very limited - I think it supports landscape orientation only, and hasn't been tested on the iPhone 5. (Maybe I have hard-coded a '480' somewhere!) This is nothing that can't be fixed with a few hours of playing around.

Custom OpenGL is not supported.

You should not use OGG music because it's not hardware accelerated.

These are the technical limitations I can think of, the rest is lack of documentation, but I read this board every day.

I think as far as C++ and iOS are concerned, it's not a bad deal :)

So how well is gosu doing for iOS development?

Omegas7 — Thu, 27 Sep 2012 22:25:47 GMT

There's a bit of discussion about gosu on iOS development, but I would like to hear from you straightforwardly: Is Gosu good or great for iOS game development at the moment? What limitations are there?

Gosu + RubyMotion?

jlnr — Thu, 13 Sep 2012 02:08:11 GMT

I have an Android 4 phone and some NDK experience, so I might be able to help with a port (via this forum and github - I still check both - but I don't have time for more right now). I think it would be easiest to port over iOS Gosu to the NDK, then wrap it up for Ruboto. The alternative would be to rewrite all of Gosu in Java, but it'd be slower and impossible to maintain in the long run.

The biggest "AAAAHHH!!!!!!!" moment is that Android does not come with OpenAL, and OpenSL ES is pure insanity. But maybe someone has compiled and packaged OpenAL by now.

Gosu + RubyMotion?

RunnerPack — Tue, 11 Sep 2012 18:53:26 GMT

I have no idea if it's directly related, but I found this (from 2008): http://code.google.com/p/jruby-jogl-applet-launcher/

I tried to run it and (after a LOOONG wait) got this:

[code]
load: class org.jdesktop.applet.util.JNLPAppletLauncher not found.
java.lang.ClassNotFoundException: org.jdesktop.applet.util.JNLPAppletLauncher
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.ClassNotFoundException: org.jdesktop.applet.util.JNLPAppletLauncher
[/code]

I really want Ruby+Gosu on Android (preferably in a compact form that can be uploaded to the Marketplace).

Gosu + RubyMotion?

bigtunacan — Mon, 10 Sep 2012 16:21:04 GMT

I know this is an old thread, but I was looking to see if anyone had tested with RubyMotion and came across this...

On the Android front I wonder if Gosu would possibly work with Ruboto. https://github.com/ruboto It is an implementation of Ruby on Android running on JRuby.

Retina Support

Basic — Tue, 22 May 2012 08:17:01 GMT

Altered the title.

Retina Support

RunnerPack — Tue, 22 May 2012 02:07:42 GMT

I'm not trying to be a jerk. I just thought, for the sake of those searching later, there should be a post in this thread which actually contains the word "retina" spelled correctly. Sorry to bother you; carry on.

Gosu + RubyMotion?

Basic — Sun, 06 May 2012 15:52:07 GMT

Oh, curious do you expect any problems with it?

A friend of mine was asking me this last week, about getting Gosu working on Chorme (Native Client) and Android.

Gosu + RubyMotion?

jlnr — Sun, 06 May 2012 04:24:33 GMT

Gosu uses OpenGL ES, OpenAL and libsndfile which are all perfectly portable. I actually have an HTC One X at home now, just waiting for a chance to toy around with it. Hope the SDK is not too much of a hassle. :(

Gosu + RubyMotion?

RavensKrag — Sat, 05 May 2012 04:31:53 GMT

Nice! Now all we need it this for android. Though, that would be much more difficult I imagine. Not like Gosu would really work in that environment anyway =/

Gosu + RubyMotion?

jlnr — Sat, 05 May 2012 02:15:33 GMT

I'll let you know once I find out, but anyone else is welcome to beat me to it.

Retina Support

jlnr — Sat, 05 May 2012 02:14:32 GMT

I think it is simply [[UIDevice currentDevice] scale] > 1.

Crash on iOS 4.x

jlnr — Sat, 05 May 2012 02:07:09 GMT

I think it is more a documentation issue with Gosu. If you create a new OpenGL app, it links to GLKit (required, not optionally). iOS 4 has no GLKit as far as I know, so it crashes. If you just remove GLKit from the project, you should be fine.

Gosu + RubyMotion?

jontebol — Fri, 04 May 2012 11:19:45 GMT

Ok, so this sounds pretty exciting: http://www.rubymotion.com/

If that could be made to work with Gosu (or perhaps it already does?!), writing games in Ruby + Gosu for iOS would be a reality...

What say you Gosu-gurus, can it be done?

Crash on iOS 4.x

Basic — Thu, 03 May 2012 11:23:04 GMT

I got this crash on iPad with iOS 4.x

dyld: Library not loaded: /System/Library/Frameworks/GLKit.framework/GLKit
Referenced from: /var/mobile/Applications/60CD176E-557E-4FBF-81AD-17803CEA3026/iPadTest.app/iPadTest
Reason: image not found

Works fine with iPad 5.x

This isn't a problem for me I just swapped iPad's, but just thought I'd mention it. I don't have the iOS 4 SDK to try and compile under that, but a quick google seems to reveal the framework is in a different place.

Retina Support

Basic — Thu, 03 May 2012 08:38:16 GMT

Thanks jlnr, I was actually doing something like that last night to test.

I think the problem is figuring out if I am on Retinia or not.

Retina Support

jlnr — Thu, 03 May 2012 06:37:38 GMT

Idea: You could hack the scale factor right into Gosu::Image by subclassing ImageData and just returning half the width and height. You cannot extend the constructor of Gosu::Image, but you could add a global helper function for that. Then image("foo") would return a Gosu::Image proper.

You might even want to consider having foo.png, foo@2x.png (iPhone4+, iPad 1/2), foo@4x.png (iPad 3) depending on how your game scales up. That is what I am going to do with Terava.

Retina Support

jlnr — Thu, 03 May 2012 06:35:45 GMT

Gosu does not follow the @2x convention. You have to build that functionality yourself, including the factor on the images. :( I built a wrapper around that myself for Terava, but it's too specific to share it here.

Retina Support

Basic — Wed, 02 May 2012 21:13:54 GMT

Is there?

I suffixed my files @2x but this didn't see to do anything. Building with 5.x SDK and Targeting 3.2.

Is there something I'm missing?

Creating a Gosu/C++ iPhone game

jlnr — Mon, 05 Mar 2012 11:22:08 GMT

Current version numbers: I use Xcode 4.2/4.3, LLVM 3.x compiler, current iOS SDK but Gosu works with OS Deployment Version down to 3.2 (*all* iOS devices ever shipped).

Creating a Gosu/C++ iPhone game

jlnr — Mon, 05 Mar 2012 11:19:46 GMT

This is what the result should look like.

Creating a Gosu/C++ iPhone game

jlnr — Wed, 16 Feb 2011 00:07:43 GMT

Oh, is the default for iOS projects to compile for armv6 and armv7 now? I think I only compile my game (and Gosu) for armv6. You can probably either fix it by compiling Gosu for both platforms, or your game for armv6. (Target options, architectures)

Creating a Gosu/C++ iPhone game

jontebol — Tue, 15 Feb 2011 22:24:06 GMT

Ok, so it seems I must have done some step wrong, because I can't get it to compile for the device (my Iphone 4)...

These are the errors I get:

Build gosutouchtest of project gosutouchtest with configuration Debug

Ld build/gosutouchtest.build/Debug-iphoneos/gosutouchtest.build/Objects-normal/armv6/gosutouchtest normal armv6
cd /Users/jonte/dev/iosapps/gosutouchtest
setenv IPHONEOS_DEPLOYMENT_TARGET 4.2
setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++-4.2 -arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.2.sdk -L/Users/jonte/dev/iosapps/gosutouchtest/build/Debug-iphoneos -L/Users/jonte/dev/games/gosu-source/lib -F/Users/jonte/dev/iosapps/gosutouchtest/build/Debug-iphoneos -filelist /Users/jonte/dev/iosapps/gosutouchtest/build/gosutouchtest.build/Debug-iphoneos/gosutouchtest.build/Objects-normal/armv6/gosutouchtest.LinkFileList -dead_strip -lgosutouch-sim -miphoneos-version-min=4.2 -framework Foundation -framework UIKit -framework OpenGLES -framework QuartzCore -framework CoreGraphics -framework OpenAL -framework AudioToolbox -framework AVFoundation -o /Users/jonte/dev/iosapps/gosutouchtest/build/gosutouchtest.build/Debug-iphoneos/gosutouchtest.build/Objects-normal/armv6/gosutouchtest

ld: warning: in /Users/jonte/dev/games/gosu-source/lib/libgosutouch-sim.a, file was built for unsupported file format which is not the architecture being linked (armv6)
Undefined symbols:
"_main", referenced from:
start in crt1.3.1.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

Ld build/gosutouchtest.build/Debug-iphoneos/gosutouchtest.build/Objects-normal/armv7/gosutouchtest normal armv7
cd /Users/jonte/dev/iosapps/gosutouchtest
setenv IPHONEOS_DEPLOYMENT_TARGET 4.2
setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++-4.2 -arch armv7 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.2.sdk -L/Users/jonte/dev/iosapps/gosutouchtest/build/Debug-iphoneos -L/Users/jonte/dev/games/gosu-source/lib -F/Users/jonte/dev/iosapps/gosutouchtest/build/Debug-iphoneos -filelist /Users/jonte/dev/iosapps/gosutouchtest/build/gosutouchtest.build/Debug-iphoneos/gosutouchtest.build/Objects-normal/armv7/gosutouchtest.LinkFileList -dead_strip -lgosutouch-sim -miphoneos-version-min=4.2 -framework Foundation -framework UIKit -framework OpenGLES -framework QuartzCore -framework CoreGraphics -framework OpenAL -framework AudioToolbox -framework AVFoundation -o /Users/jonte/dev/iosapps/gosutouchtest/build/gosutouchtest.build/Debug-iphoneos/gosutouchtest.build/Objects-normal/armv7/gosutouchtest

ld: warning: in /Users/jonte/dev/games/gosu-source/lib/libgosutouch-sim.a, file was built for unsupported file format which is not the architecture being linked (armv7)
Undefined symbols:
"_main", referenced from:
start in crt1.3.1.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

Creating a Gosu/C++ iPhone game

jlnr — Sun, 13 Feb 2011 18:54:20 GMT

Hmmm. You can just call "graphics().setResolution(960, 640)", but I think this should be the default maybe. But you can rest assured that if you draw something at 0.5, 0.5, this will actually be @ 1, 1 on the iPhone 4. I think this is what Apple is doing with UIKit too.

Creating a Gosu/C++ iPhone game

jontebol — Sun, 13 Feb 2011 12:48:44 GMT

Thanx! :)

Gee... I'd forgotten about that window. I knew there was important runtime information somewhere... :) Turns out, I just had to delete the reference to the MainWindow-xib file from the plist file in order to get it working. I now have a working Gosu Touch project! Wohoo! Totally awesome actually... :)

I noticed however that changing the screen size doesn't seem to have any effect whatsoever. I have an IPhone 4 so I'd like to use a resolution of 960x640 but it doesn't seem to want to do that... Any tips?

Btw, what's the best way of adding resources to the project? I've tried with a png image and got it working just by putting it in the resources folder in XCode... Is that the way to go generally?

Thanks for your help, it's greatly appreciated! And as always... for the lib itself... :)

Creating a Gosu/C++ iPhone game

jlnr — Sun, 13 Feb 2011 06:54:07 GMT

Welcome aboard! ;)

> One thing I was unsure of was what to do with Gosu Touch once I'd built it

It should be in /lib, but it doesn't really matter as long as you adjust the following step:

>>• add -lgosutouch to the linker flags for Release, -lgosutouch-sim to the linker flags for Debug, and make sure the 'lib' folder of Gosu is in the library search path

But a missing Gosu library should actually lead to linker errors on build... Can you see the runtime error in the console window (cmd+shift+R)?

Creating a Gosu/C++ iPhone game

jontebol — Sat, 12 Feb 2011 12:08:25 GMT

Ok I'm trying to increase the userbase of Gosu Touch by many percent here... by jumping on the wagon...

I've followed all of the steps above, and gotten so far as getting the simulator up in debug mode. However... I must be missing something vital, because when the simulator starts my app, it just quits it again immediately... Basically, nothing happens... Xcode just tells me "Debugging terminated" without throwing any errors or anything like that... It's almost as if I'm missing a game loop or something, as if the program just finishes running, but Gosu::Window should take care of that for me, right?

I'm using the most recent version of the SDK...

I'm practically a complete noob with both XCode, C++ and Iphone dev... I managed to create a small game demo in Objective-C and cocos2d for iphone earlier (like 2 years ago), but since I'm working on a game in Gosu now (in Ruby, currently), I'd love to be able to get it running...

One thing I was unsure of was what to do with Gosu Touch once I'd built it... Does it matter where it lies? I mean, when I built it, it seems to have ended up in a folder called "build" in the source folder of Gosu. I haven't entered that search path anywhere in my xcode project, so how could it matter that I built it? I've just entered the header search path and lib path... Could this be related to my problems? I mean, doesn't the build need to be included in my project somehow?

Anyways, any help would be greatly appreciated. It would be totally awesome to use Gosu on the IPhone, even if it means I have to learn C++ (which doesn't seem all that daunting actually)...

Portait Mode

Basic — Sun, 06 Feb 2011 07:06:58 GMT

Posting this just for posterity, if you want to kick Gosu iOS into portrait mode, make these adjustments.

http://pastie.org/1533188

Possibility of Ruby / Cocos2d

jlnr — Thu, 09 Sep 2010 19:17:45 GMT

And another policy change. Now actually there's no reason not to give Ruby/Gosu on the iPhone another try. Awesome, can't wait until I have time. :)

Extending the UIApplicationDelegate

jlnr — Sat, 28 Aug 2010 21:10:28 GMT

Good idea:


// All three empty, but SDK docs say these are "required" (?)
- (void)applicationProtectedDataWillBecomeUnavailable:(UIApplication *)application;
- (void)applicationProtectedDataDidBecomeAvailable:(UIApplication *)application;
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification:
// Sets up everything
- (void)applicationDidFinishLaunching:(UIApplication *)application;
// Stops/resumes Song
- (void)applicationWillResignActive:(UIApplication *)application;
- (void)applicationDidBecomeActive:(UIApplication *)application;

Gosu basically forwards applicationWillResignActive as the "Window::loseFocus" callback now. It could do the same for ~BecomeActive.

The didReceiveLocalNotification sounds a bit like a pity.

Extending the UIApplicationDelegate

erisdiscord — Sat, 28 Aug 2010 18:47:53 GMT

This is why I (kind of) love Objective-C. :)

One thing: I'd recommend publishing a list of delegate methods that your delegate implements so we, the unwitting users of your library don't accidentally trample them and wonder what's going on when something weird breaks.

Extending the UIApplicationDelegate

jlnr — Sat, 28 Aug 2010 03:18:22 GMT

There are times when you want to override methods in the UIApplicationDelegate. However, Gosu needs its own delegate for a few methods (didInitialize mostly), so you cannot set the delegate to your own instance. What you can do, however, is simply using Objective C categories to just attach methods to Gosu's implementation:


// Make GosuAppDelegate known
@interface GosuAppDelegate
@end

// Add a category to GosuAppDelegate
@interface GosuAppDelegate (YourExtension)
@end

// Now add new methods
@implementation GosuAppDelegate (YourExtension)
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)newURL
{
...
}
...
@end

Info.plist

jlnr — Sat, 21 Aug 2010 20:33:56 GMT

It is kinda dangerous to use the "human-readable" names because they might or might not be translated into their actual identifiers. Updated the screenshot to show the raw identifiers which count. I couldn't upload to the App Store simply because I had a key "Icon files" which should be UIIconSomething...

Info.plist

jlnr — Sun, 15 Aug 2010 14:46:49 GMT

It should be noted that Default.png and Default@2x.png should be rotated 90° to the left for this to work, these files are 320x480 and 640x960 respectively (as in Portrait orientation).

As for the icons, there are some things to notice, e.g. that the 50x50px one is actually 48x48 because iOS trims off the edges etc., the Apple support docs for *that* are understandable though.

I think the only weirdness I can see in my game is that the volume control bezel is upside down sometimes.

Possibility of Ruby / Cocos2d

jlnr — Mon, 09 Aug 2010 12:41:17 GMT

I doubt anybody ever didn't jailbreak his phone because he feared the cops ;) Apple will still not support it and I think going through the App Store to reach a widely extended audience is the way to go. Of course, if anyone wants to do an awesome Ruby/Gosu game for the iPhone, I'd be there to play it!

My current game is too complex to be managable in Ruby anyway. After that I'll see again if I can somehow improve the transition from prototyping in Ruby to having a finished game on the iPhone.

Possibility of Ruby / Cocos2d

King Kadelfek — Mon, 09 Aug 2010 12:08:57 GMT

Now, you can legally jailbreak the iPhone :
http://www.wired.com/threatlevel/2010/07/feds-ok-iphone-jailbreaking/

Apple can still refuse your app if it's against their policy, but people will be able to download it on your website. Jailbreak an iPhone is really easy.
What about your motivation to jump into that Ruby-on-iPhone thing ?

Info.plist

jlnr — Tue, 03 Aug 2010 06:37:30 GMT

Just thought I'd collect mine here for comparison and reference. Should be a typical plist for a landscape mode game.

Sound and Music

Maverick — Thu, 22 Jul 2010 16:21:50 GMT

Awesome

Sound and Music

jlnr — Thu, 22 Jul 2010 05:15:33 GMT

Gosu now uses AVAudioPlayer for Gosu::Song playback if the file ends in .mp3, .m4a or .aac. This makes playback way faster because it is hardware accelerated (.ogg is never).

For sound, I heard IMA4 is the way to go. Will inspect that too.

Funny how the distinction between Song and Sample makes sense on so many platforms. I guess the merger into one universal Gosu::Sound object is never going to happen.

Input on iOS

Basic — Fri, 16 Jul 2010 18:49:43 GMT

ok, we like that method now :D

Input on iOS

jlnr — Fri, 16 Jul 2010 16:51:35 GMT

Never mind. I actually realized I had an elegant way to use it somewhere in my codebase. Documented how I do buttons as an example—I actually like the touchMoved method for that.

Input on iOS

Basic — Fri, 16 Jul 2010 15:51:56 GMT

erm, well I dont mind :D

Input on iOS

jlnr — Fri, 16 Jul 2010 15:01:08 GMT

Dear huge Gosu Touch userbase :D,

Any objections towards kicking out the touchMoved event? I really don't see the point. You might as well just poll in a Gosu-based application.

iPad?

Basic — Fri, 02 Jul 2010 15:28:03 GMT

woohoo :)

iPad?

jlnr — Fri, 02 Jul 2010 06:29:26 GMT

Yay, just got mine in the mail. :)

Accelerometer Stuff

Basic — Mon, 21 Jun 2010 13:35:28 GMT

I managed to get some basic accelerometer functionality working, currently it spits back the raw x,y,z data.

here's a video of it working.

http://vimeo.com/12735275

its all a bit hackish atm, I need to clean it up. it was quite easy in the end, obj-c is cool :D

Input on iOS

jlnr — Sun, 20 Jun 2010 10:44:33 GMT

Oops—I updated the Xcode project so that Version.hpp should now be included if anyone should ever need it for any weird compatibility workarounds. :)