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.
Descriptors:
Subject Categories:
- Computer Programming and Software