The Virtual EDF Builder (where "EDF" signifies Electronic Development Fixture) is a computer program that facilitates the use of the Internet for building and displaying digital models of three- dimensional (3D) objects that ordinarily comprise assemblies of solid models created previously by use of computer-aided-design (CAD) programs. The Virtual EDF Builder resides on a UNIX- based server computer. It is used in conjunction with a commercially available Web-based plug-in viewer program that runs on a client computer. The Virtual EDF Builder acts as a translator between the viewer program and a database stored on the server. The translation function includes the provision of uniform resource locator (URL) links to other Web-based computer systems and databases. The Virtual EDF builder can be used in two ways: (1) If the client computer is UNIX-based, then it can assemble a model locally; the computational load is transferred from the server to the client computer. (2) Alternatively, the server can be made to build the model, in which case the server bears the computational load and the results are downloaded to the client computer or workstation upon completion.

This program was written by Tim Schramer and Jeff Jensen of Boeing North American, Inc., for Johnson Space Center. For further information, access the Technical Support Package (TSP) free on-line at under the Software category. MSC-22988.