Articles Written by Andy McGovern

A 3D Object Picking Technique that Uses OpenGL

How to set up a 3D model in OpenGL so that a user can pick and identify objects in the model. This technique is very helpful in both game programming and visualization.

Geographic Distance and Azimuth Calculations

This article presents the basics of how to do geographic calculation for a spherical and ellipsoid Earth model, and provides sample code that implements solutions to several interesting geographic calculations.

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