PERSYS: A Collection of FORTRAN Subroutines to Produce Perspective Views of Data Surfaces Defined on Rectangular Grids.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1976
- Accession Number
- ADA030152
Entities
People
- Gerald N. Cederquist
Organizations
- University of Michigan