Author(s)

S. Ruiz & L. Cremades

Abstract

Visualization of 3D scalar fields. Application to air pollution concentration fields S. Ruiz," L. Cremades^ * ITEM A, Universitat Politecnica de Catalunya, CW. TVocz'oW JJO, 6m ^.5, ApWo. 50(9, Terrassa, Spain . de Proyectos de Ingenieria, U.P.C., ABSTRACT Air pollution distributions usually form finite volumes inside the 3D domain of simulation models. We have developed an application to calculate and visualize isosurfaces whose main restraint is that they must be closed (or at least almost closed) into the closed domain boundaries. This application uses a 3D regular-spaced data mesh which defines the domain. This 3D mesh should be formed by a series of surfaces which should not be interlaced. These surfaces can have any shape. The procedure for generating an isosurface has two steps: 1) the contour of the isosurface is computed in every plane. Every contour has to be closed. If open contours are created, they will be closed through the domain boundaries. 2) Th

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