Accession Number:

ADA030152

Title:

PERSYS: A Collection of FORTRAN Subroutines to Produce Perspective Views of Data Surfaces Defined on Rectangular Grids.

Descriptive Note:

Technical memo,

Corporate Author:

MICHIGAN UNIV ANN ARBOR COOLEY ELECTRONICS LAB

Personal Author(s):

Report Date:

1976-08-01

Pagination or Media Count:

52.0

Abstract:

The PERSYS routines produce coordinate pairs for the straightline vectors forming a two-dimensional view of a three-dimensional surface. Portions of the surface which are not visible are not drawn. The routines operate on user-supplied samples of the x, y, and z coordinates of the surface to be drawn. To reduce processing time, the routines assume that the data samples are available on a rectangular grid surfaces represented by randomly scattered points cannot be directly processed by PERSYS. The routines are device-independent in the sense that at execution time, the user must supply the names of subroutines that PERSYS can call to dispose of the coordinate pairs describing the two-dimensional view.

Subject Categories:

  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE