Fragment Shader Performance Comparison: iPhone 5 vs iPhone 4

No surprise. With a simple raytracing shader (i.e. not-optimized, with massive dynamic branching and arithmetic operations), iPhone 5 easily achieved 26.5 fps, while iPhone 4 could only have 2.2 fps.

The test scene was simple. There was a red sphere, and a green triangle in front of it. A point of light was rotating around the sphere, lighting both objects, and cast shadow on the sphere.

iPhone 5’s PowerVR SGX543MP3 GPU is truly a performance monster among the family of mobile devices. It would have the potential to perform some of the effects which was only available to desktop PC or video game consoles.

iphone5_vs_iphone4_shader_performance

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Build A Fully Functional, Robust and Secure Passbook Server with (Almost) Zero Cost

Briefing

This post discussed the implementation of a fully workable Passbook server. Instead of a step by step tutorial, it mentioned some technical decisions and considerations in a realistic Passbook server implementation.

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SEVEN² Released on App Store

SEVEN² (Seven Squared) is a brand new brain-teaser. This word puzzler has an unique minimalist-styled interface and is built to satisfy the player hungers for real challenge.

The game has a simple, relaxing, and addictive game play. On a board of 7² (49) tiles, you only need to link letters, score by making words and try your best to survive 7² (49) rounds. There is NO time limit. You can take as much time as you need to plan your next step.

Does it sound too easy? Think twice! You need to be careful in spelling every word, turning the difficult letters to your advantage and strategically position the falling letters to balance risk and reward.

Official website: http://www.premiereliaison.com/seven²/

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