»Two-Color Plotter Graphic« by Robert Mallary | i |
creators: Robert Mallary
title: Two-Color Plotter Graphic
year: 1973

drawing, computer-generated Plotter Graphic, 4×5 inches

artwork type: drawing

A two-color plotter graphic made with the Amherst College IBM 1130 computer and plotter. The main program (called TRPL) was written by Robert Mallary. A curve fitting subroutine (called XFIT) was written by Dr. Roger Ehrich. The program interpolates a series of lines between a given “master” line on the left and another such line on the right. A third master line is used to graph the spacing between the lines. The Moiré patterns result from the visual interaction between the spaced lines with a peculiarity of the pen. It is restricted by a system program to moving either vertically, or horizontally, or at some increment of 45 degrees.

enter new comment
(Please leave an email address or your name. This is completely optional and only used to get in contact with you.)