Representing data in terms of spatial relationships is becoming increasingly common. Our authors use trigonometry, 3-D vector algebra, and Voronoi tessellation to build a complete geographical information system to explore spatial data types.
Programming for sound has never been simple. QuickTime, Apple's system-wide architecture for handling dynamic data, is a first step towards audio ease-of-coding. Aaron presents a technique for converting traditional Macintosh sound resources to QuickTime sound data samples.
Al discusses persistence, then presents a method for adding persistent objects to C++ programs by deriving applications classes from a persistent base class.
When Dick's group first started working on a programming environment for C and C++, there was no commercially available way to add persistence to objects. He describes what he was trying to do, why he needed persistence, his first attempts at adding persistence, and finally, his solution.
Splay trees are self-adjusting data structures that rearrange themselves in response to changing program operations. They're easy to code and made maintain, have low overhead, and can improve performance.
In the December 1989 DDJ, Scott presented his highly controversial "Are the Emperor's New Clothes Object Oriented?". Now, three years later, he takes a second look to see if anything has changed.
With software simulation and hardware testboards, you can debug and test code in parallel with hardware development. Michael explains how these techniques were applied to the software-development cycle of an embedded controller.
In this two-part article, our authors describe how you can simulate the execution of a hypercube program on a standard UNIX system. This month, they focus on partitions, the basic building blocks of a hypercube system. Next month, they present the source code for the simulator and discuss how to use the system.
For delivering large amounts of data, CD-ROMs give you the biggest bang for the buck. Bill and Lynne untangle the ISO-9660 filesystem format and present utilities to decode a CD-ROM and view a file.
In today's database parlance, sound and image data are known as "binary large objects," or BLOBs for short. Sam examines one approach to constructing and storing BLOBs in an object-oriented DBMS system.
Michael recognizes a good thing when he sees it. In this month's column, he and Ronjon Nag, cofounder of a company developing cursive handwriting-recognition tools, talk about ink as a data type.
A D-Flat++ program starts with an application window on a desktop. Al presents the source files that contain the member functions for the desktop and its devices.
Until now, Jeff never paid much attention to the notion of Turbo Vision resources--something akin to an ISAM manager for an ordinary Turbo Vision stream. He also uses Blaise's Turbo Vision Development Toolkit to explore resources.
Michael implements a fast assembler version of his run-length slice line-drawing routine before returning to the subject of page flipping.
One of the best discussions you'll find of demand-page virtual memory is in Harold Stone's High-Performance Computer Architecture, the book Andrew examines this month.
Copyright © 1992, Dr. Dobb's Journal