Download e-book for kindle: 3D Engine Design for Virtual Globes by Patrick Cozzi

By Patrick Cozzi

ISBN-10: 1439865582

ISBN-13: 9781439865583

ISBN-10: 1568817118

ISBN-13: 9781568817118

Supported with code examples and the authors’ real-world adventure, this ebook bargains the 1st advisor to engine layout and rendering algorithms for digital globe purposes like Google Earth and NASA international Wind. The content material can be helpful for common snap shots and video games, in particular planet and massive-world engines. With pragmatic suggestion all through, it truly is crucial examining for practitioners, researchers, and hobbyists in those parts, and will be used as a textual content for a unique subject matters direction in special effects.

Topics coated include:

  • Rendering globes, planet-sized terrain, and vector data
  • Multithread source management
  • Out-of-core algorithms
  • Shader-based renderer design

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Sample text

X ✯ _radiiSquared . X , _radiiSquared . Y ✯ _radiiSquared . Y , _radiiSquared . Z ✯ _radiiSquared . Z ) ; } p u b l i c Vector3D S c a l e T o G e o d e t i c S u r f a c e ( Vector3D p ) { d o u b l e b e t a = 1 . 0 / Math . S q r t ( ( p . X ✯ p . X ) ✯ _oneOverRadiiSquared . X + ( p . Y ✯ p . Y ) ✯ _oneOverRadiiSquared . Y + ( p . Z ✯ p . Z ) ✯ _oneOverRadiiSquared . Z ) ; d o u b l e n = new Vector3D ( beta ✯ p . X ✯ _oneOverRadiiSquared . X , beta ✯ p . Y ✯ _oneOverRadiiSquared . Y , beta ✯ p .

12(a). 12(c). There are a variety of path types, each with different properties. A geodesic curve is the shortest path connecting two points. Rhumb lines are paths of constant bearing; although they are not the shortest path, they are widely used in navigation because of the simplicity of following a constant bearing. 13(a). On a sphere, a great circle is the intersection of a plane containing the sphere’s center and the sphere’s surface. The plane cuts the sphere into two equal halves. 4. 12. (a) Connecting two endpoints on the ellipsoid surface with a line results in a path that travels under the ellipsoid.

0 / Sqrt ( 2 . 2. Fundamental Vector3D operations. double precision as explained in Chapter 5. 1 We use meters for units in Cartesian coordinates and for height in geodetic coordinates, which is common in virtual globes. Let’s turn our attention to ellipsoids, which will allow us to more precisely define geographic coordinates, and ultimately discuss one of the most common operations in virtual globes: conversion between geographic and WGS84 coordinates. 2 Ellipsoid Basics A sphere is defined in 3-space by a center, c, and a radius, r.

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3D Engine Design for Virtual Globes by Patrick Cozzi

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