procedure pborder: place border around pattern procedure pcaten: concatenate patterns procedure pcenter: center pattern procedure pcrop: crop pattern procedure pdisplay: display pattern procedure pdouble: double pattern procedure pflip: flip pattern procedure phalve: halve pattern by bits procedure pinvert: invert B&W pattern procedure pminim: minimize pattern procedure por: "or" patterns procedure protate: rotate pattern procedure pscramble: scramble pattern procedure pshift: bit shift pattern procedure ptrim: trim pattern
link patxform
June 26, 2002; Ralph E. Griswold
Requires: Version 9 graphics
This file is in the public domain.
pborder(rows, l, r, t, b, c) pcaten(rows1, rows2, dir) pcenter(rows, w, h) pcrop(rows, l, r, t, b) pdisplay(rows) pdouble(rows, dir) pflip(rows, dir) phalve(rows, dir, choice) pinvert(rows) pminim(rows) por(rows1, rows2) protate(rows, dir) pscramble(rows, dir) pshift(rows, shift, dir) ptrim(rows, c)