Category Archives: Conferences and events

Space in Stereo iPhone Game Jam Postmortem

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A week ago, I sent out a quick tweet asking if anyone would be interested in doing an iPhone Game Jam at the 360iDev conference. The response was immediate and hugely positive, so, with the help of the organizers of 360iDev, we put together an informal iPhone Game Jam.

The idea was to get together Tuesday evening, starting at around 7PM, and to code all night and have an iPhone game (or at least a prototype) done by morning. About 25 showed up, working on about a dozen projects. Participants were welcome to group into teams or work solo. There were no restrictions as far as themes or technology. The only rules were that you had to finish something by morning (no leaving something that was 5% of a game) and you had to start the game from scratch (no finishing a game you had started a while ago).

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360iDev: Cranking Up Floating Point Performance To 11

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360iDev_speakerHere are the slides and the source code for my talk this afternoon at 360iDev in Denver. Thanks to everyone who came to the talk. I was surprised to see so much interest on this topic, so that was great.

Session description:

The iPhone has a very powerful engine under that shiny hood when it comes to floating-point computations. This is something that surprises a lot of programmers because by default, things can slow down a lot whenever any floating point numbers are involved. This session will explain the secrets to unlocking maximum performance for floating point calculations, from the mysteries of Thumb mode, to harnessing the full power of the forgotten vector floating point unit. Stay away from this session if he thought of reading or even (gasp!) writing assembly code scares you.

GDC Austin 2009: Squeezing Every Drop Of Performance Out Of The iPhone

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austinI just put up the slides for my talk this morning at GDC Austin: Squeezing Every Drop Of Performance Out Of The iPhone.

Thanks for everyone who attended the session and for the great feedback so far. If you’re going to be in China next month, I’ll be giving a very similar talk at GDC China.

Session description:

This session will describe the iPhone performance optimization lessons learned through many hours of tuning. We’ll start with an overview of the performance analysis tools available on the iPhone SDK to help you narrow down your performance bottlenecks. Then we’ll cover the best way to set up your render loops, rendering best practices, how to deal with the limited memory, or even how to drop down to assembly to use the forgotten vector floating point unit.

Presentation slides (pdf format)

Early Bird Registration Ending For Denver OpenGL Class And 360iDev

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OpenGL_iPhoneFor those of you still on the fence about attending my iPhone OpenGL class in Denver, you should sign up before this Sunday if you want to get the super-combo deal. Right now you get a total combined discount of over $300 if you sign up both for the OpenGL class and the 360iDev conference. If you’re only interested in the OpenGL class, the early-bird registration ends next Friday, September 4th.

Obviously I’m biased when I say the class is going to be awesome (which it is), but I can also say with total honesty that 360iDev is an incredible conference. It’s very different from WWDC, but that’s what makes it so great: It has top-quality content and speakers, but it’s small and intimate, so you get to meet and hang out with all the other speakers and participants. It was at the first 360iDev conference back in March that I met Keith and Owen (among many other cool developers) in person for the first time and that’s how App Treasures was born.

So if you’re on the fence, I hope you give it a try. See you in Denver!

Teaching a Two-Day OpenGL iPhone Class. Register Now!

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openglI’m excited to announce the intensive, two-day class on OpenGL for the iPhone that I’ll be teaching. The class will be held September 26th-27th, in Denver, right before the 360iDev conference, and it’s part of the Mobile Orchard Workshops.

The class is aimed at iPhone developers without previous OpenGL experience. It’s going to be very hands-on, and you’ll create both 2D and 3D applications during the weekend. You’ll learn all the basics: cameras, transforms, and how to draw meshes, but we’ll also cover some more advanced topics such as lighting, multitexturing, point sprites, and even render targets. Most importantly, you’ll walk away with a solid understanding of the basis, which will allow you to continue learning OpenGL and advanced computer graphics on your own from the docs, samples, or even browsing the API directly.

The main requirement for the class is that you’re familiar with the iPhone development environment and that you have basic knowledge of the C language. Beyond that, to the the most out of the course, you should be familiar with the basics of linear algebra (vector, matrices, and dot products). Anything else, we’ll cover it all during the class.

Registration is now open, and you can get some great discounts by registering early and attending the 360iDev conference. For more details, check the official announcement page.

Hope to see some of you there!