Introduced 160 years ago as an attempt to generalize complex numbers to higher dimensions, quaternions are now recognized as one of the most important concepts in modern computer graphics. They offer a powerful way to represent rotations and compared to rotation matrices they use less memory, compose faster, and are naturally suited for efficient interpolation of rotations. Despite this, many practitioners have avoided quaternions because of the mathematics used to understand them, hoping that some day a more intuitive description will be available. (more…)

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Still the top-selling software suite for Mac users, Microsoft Office has been improved and enhanced to take advantage of the latest Mac OS X features. You’ll find lots of new features in Office 2008 for Word, Excel, PowerPoint and Entourage, but not a page of printed instructions to guide you through the changes. Office 2008 for Macintosh: The Missing Manual gives you the friendly, thorough introduction you need, whether you’re a beginner who can’t do more than point and click, or a power user who’s ready to tackle a few advanced techniques. (more…)

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Tourism is one of the leading industries worldwide. The magnitude of growth in tourism will bring both opportunities and problems to source and destination markets in years to come, especially in the internal and external exchange of information in the industry. Information and Communication Technologies in Support of the Tourism Industry examines the process of (more…)

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Now you can get the most out of your PC with the fun and practical projects packed inside this easy-to-follow guide. Produced in conjunction with CNET.com, the place you go for the latest in tech and consumer electronics, this book shows you how to exploit the media, communications, networking, and security features of your PC. You’ll also find out how to add powerful hardware and software, improve performance, and expand your computer’s capabilities. (more…)

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