Interactive ELLPACK

Abstract

ELLPACK is a versatile, very high-level language for solving elliptic partial differential equations. Solving elliptic problems with ELLPACK typically involves a process in which one repeatedly computes a solution, analyzes the results, and modifies the solution technique. Although this process is best suited for an interactive environment, ELLPACK itself is batch oriented. With this in mind, we have developed Interactive ELLPACK, an extension of ELLPACK that provides true interactive elliptic problem solving by allowing the user to interactively build grids, choose solution methods, and analyze computed results. Interactive ELLPACK features a sophisticated interface with window- ing, color graphics output, and graphics input.