Visualização 3-D de campos meteorológicos escalares

Abstract

This work propose some solutions for the three-dimensional visualization problem of escalar meteorological fields based on grid datas of the National Meteorological Center (NMC). The propose technics are based on classic methods of computer graphics. They process temperature, geopotencial and pressure data at 1000, 850, 700, 500,400 and 300 milibars standard isobaric levels on 12.5° N to 30° S of latitude to 20° W to 80° W of longitude. The floating horizon algorithm was the technic adopted to modelling visualizing data that displays the behaviour of fields along an isobaric surface. The cromatic model HSV has been used to represent this behaviour. The use of data on a 3-D domain (latitude x longitude x pressure level) suggested also the implementation of methods for volumetric modeling. As a result, the work presents also, a modelling approach based on linear octrees. The object oriented programming and the C++ language programming was adopted to implementation on SUN workstations.