Triangle Sets in PHIGS PLUS: A Valuable Link with Finite Element Modeling

摘要

The addition of an output to PHIGS (Programmer's Hierarchical InteractiveGraphics System) PLUS: TRIANGLE SET 3 WITH DATA together with its two dimensional shorthand is addressed. The principal reason for the addition was that only triangular primitives admit uniquely defined interpolation of data (colors, normals, etc.) across the facet. However, an additional advantage of this new primitive is its value for the visualization of scientific computing results. It corresponds in a very pleasant way with the Finite Element Method (FEM) using piecewise linear blending functions on a triangular partition of the functional domain. An outline of the possible use of this function by FE engineers is given.