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Archive for the 'Resources' Category

Upgrades from Lite Version are #1 Driver of iPhone App Purchases

Friday, August 28th, 2009

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The July metrics report from AdMob includes some really interesting bits.  Even if you don’t completely trust their methodology, you should at least take a look at their results.

Blogs That I Follow

Wednesday, August 26th, 2009

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A new iPhone app developer recently asked me which blogs I follow to try to keep up with the “industry.”  Here’s the list, along with some comments on why I stick with these.

Creating Sprites:  SketchUp vs. Blender

Saturday, August 22nd, 2009

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I don’t question Blender’s dominance for creating 3D models, but SketchUp might be good enough for creating 3D scenes that can be rendered to 2D images.

What Fonts are on my iPhone?

Thursday, August 13th, 2009

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This is really easy to answer, but I keep seeing the question on various forums.  I’ve needed to refer to the list several times recently for some UI work, and I got tired of searching for the list every time that I needed it, so…

Look Ma, No Stencil Buffer

Thursday, July 30th, 2009

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Shows an example of using OpenGL depth culling and transparency to achieve a stencil effect in the absence of a stencil buffer on the iPhone.

Taming SoundEngine Processor Utilization

Wednesday, July 22nd, 2009

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Here’s a simple modification to SoundEngine that cures performance problems with looping effects having long preambles (or attack buffers.)

iPhone App Marketing Series: Promo Code Giveaways

Friday, July 17th, 2009

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An entire shadow system of app promo code giveaways seems to have evolved over the past several months.  I wondered if this might be a viable way to promote our apps, so I gave it a try.

Chipmunk: 2D Physics on the iPhone

Thursday, July 2nd, 2009

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We recently submitted v1.1 of iPuck to the App Store.  The primary “under the hood” change was a port to the Chipmunk physics library.  If you need a lightweight, fast and straightforward physics library for 2D apps on the iPhone, you should check Chipmunk out.  In this discussion, we’ll introduce the library and talk a bit about our experience with it.

iPhone App Marketing Series: When to End App Support for iPhone OS 2.x?

Friday, June 26th, 2009

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With iPhone OS 3.0 in the wild, we’ve been wondering how long we should continue to maintain compatibility with iPhone OS 2.x.  For us, it really comes down to a resource issue.  Fortunately, the latest reports seem to suggest that 3.0 adoption is happening very quickly, so we might not be in both worlds for long.

Taming Touch / Multi-Touch on the iPhone

Tuesday, June 23rd, 2009

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It seemed so simple at the time.  I wanted to manifest a different behavior when dragging the player sprite in iPuck with two fingers, instead of just one finger.  Not so fast, Skippy.  The solution is buried in the documentation, but most of the touch code samples that I’ve seen don’t implement it.