---
title: "The Plotter"
type: "article"
slug: "the-plotter"
url: "http://localhost/article/the-plotter/"
markdown_url: "http://localhost/article/the-plotter.md"
published_at: "2026-01-20T21:48:42+00:00"
modified_at: "2026-01-20T21:48:42+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "This program prints fancy patterns to the screen or to the EPSON HI-80 plotter. The patterns are based on CYCLOIDS, or the movements of a point on a spoke of a wheel turning within another wheel. Ап unlimited number of different patterns can be drawn by changing one or more parameters of the procedure PATTERN."
category:
  - name: "CATS Newsletter"
    slug: "cats-newsletter"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/cats-newsletter/"
post_tag:
  - name: "QL"
    slug: "ql"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ql/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
model:
  - name: "Sinclair QL"
    slug: "sinclair-ql"
    taxonomy: "model"
    url: "http://localhost/model/sinclair-ql/"
indiv:
  - name: "Peter van Dijk"
    slug: "peter-van-dijk"
    taxonomy: "indiv"
    url: "http://localhost/indiv/peter-van-dijk/"
publication_r:
  id: 35941
  title: "CATS Newsletter"
  type: "periodical"
  url: "http://localhost/periodical/cats-newsletter/"
authors_r:
  - name: "Peter van Dijk"
    slug: "peter-van-dijk"
    taxonomy: "indiv"
    url: "http://localhost/indiv/peter-van-dijk/"
volume: "7"
issue: "11"
issues_articles:
  - id: 38907
    title: "CATS v7 n11"
    type: "issue"
    url: "http://localhost/issue/cats-v7-n11/"
pages: "9-10"
pubdate: "March 1990"
archive_link: false
---

# The Plotter

This program prints fancy patterns to the screen or to the EPSON HI-80 plotter. The patterns are based on CYCLOIDS, or the movements of a point on a spoke of a wheel turning within another wheel. Ап unlimited number of different patterns can be drawn by changing one or more parameters of the procedure PATTERN.