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. The wait is over. Andrew Hanson's new book is a fresh perspective on quaternions. The first part of the book focuses on visualizing quaternions to provide the intuition necessary to use them, and includes many illustrative examples to motivate why they are important—a beautiful introduction to those wanting to explore quaternions unencumbered by their mathematical aspects. The second part covers the all-important advanced applications, including quaternion curves, surfaces, and volumes. Finally, for those wanting the full story of the mathematics behind quaternions, there is a gentle introduction to their four-dimensional nature and to Clifford Algebras, the all-encompassing framework for vectors and quaternions. Richly illustrated introduction for the developer, scientist, engineer, or student in computer graphics, visualization, or entertainment computing. Covers both non-mathematical and mathematical approaches to quaternions.
A pure quaternion such as , of the form , where n is a unit vector (n2 = 1), will be called a unit quaternion. They will always bedenoted in this chapter with lowercase letters. We shall now establishan additive form for quaternions, ...
The second observation holds because multiplication by unit quaternions on the left or the right is an isometry and hence preserves ... Thus quaternion multiplication represents a double rotation, a rotation in two orthogonal planes.
The book is intended for use along with any OpenGL programming book, but the crucial features of OpenGL are briefly covered to help readers get up to speed. Accompanying software is available freely from the book's web site.
This book is about the mathematical basics and applications of quaternions. The first four chapters mainly concerns the mathematical theories, while the latter three chapters are related with three application aspects.
This engaging book presents the essential mathematics needed to describe, simulate, and render a 3D world.
Regardless of convention of configuration description the key element of visualization is to visualize change in time ... The literature on visualizing quaternions and more generally quaternions trajectories and fields is extensive, ...
Hanson's modestly titled Visualizing Quaternions [30] analyzes quaternions using tools from several different ... and is sprinkled with interesting engineering and mathematical lore; it also discusses how to visualize quaternions.
Divided into five parts, the book begins with a basic introduction to the noncommutative algebra underlying the theory of quaternion algebras over fields, including the relationship to quadratic forms.
Rotation Matrix We should note here that the theory of linear algebra tells us the matrix representation for a rotation in R* is unique. That is, for a given rotation in R* there is one and only one matrix which represents that rotation ...
The heart of any system that simulates the physical interaction between objects is collision detection-the ability to detect when two objects have come into contact.