https://github.com/drskullster/hpgl-viewer

Javascript HPGL viewer using Canvas
https://github.com/drskullster/hpgl-viewer

hpgl javascript

Last synced: 2 months ago
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Javascript HPGL viewer using Canvas

• Host: GitHub
• URL: https://github.com/drskullster/hpgl-viewer
• Owner: drskullster
• License: mit
• Created: 2017-11-19T15:53:27.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2023-04-19T13:11:30.000Z (over 1 year ago)
• Last Synced: 2024-05-22T07:55:51.408Z (8 months ago)
• Topics: hpgl, javascript
• Language: JavaScript
• Size: 1.6 MB
• Stars: 19
• Watchers: 2
• Forks: 4
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-plotters - HPGL Viewer - An HPGL Viewer using JavaScript and HTML5 canvas. (Software / HPGL)

README

        
# HPGLViewer

Javascript HPGL viewer using HTML5 Canvas.

**Warning:** This is an early release, only a

handful of HPGL code is handled. If you would like to 

contribute, please do !

The code (as well as the doc) is really simple and straightforward for now, 

the idea is to see if there are people interested in a library

to use in their own project, or just in an online viewer, or no one is interested

because HPGL is sooo old.

## Demo

https://drskullster.github.io/hpgl-viewer/demo

## Usage

Create a HTML Canvas element in your HTML page :

    

Download `HPGLViewer.js` file in `src/` folder 

then initialize with :

    var hpglViewer = new HPGLViewer({

        container: "hpgl-viewer", // ID of the HTML Canvas element

        canvasWidth: 900, // in px

        machineTravelWidth: 416, // in mm

        machineTravelHeight: 259 // in mm

    });

    

Feed HPGL content to viewer :

    hpglViewer.draw("PU0,0;PD4000,4000;")

## Development

Library is packaged into a UMD module with webpack.

You can run a development server that will watch changes

and reload the demo page with `npm run dev`.

## HPGL Commands

### Done

* `PU` Pen Up (simply move on canvas)

* `PD` Pen Down

* `PA` Plot with absolute coordinates

* `AA` Arc

* `SP` Pen Select

### Ignored

* `IN` Initialize

* `VS` speed select

### Todo

* `CP` and other Text related commands

* `CI` Circles

* `PR` Position relative to next point ?

* `IP` and `SC` machine scale ?

## Reference

See here for a list of HPGL commands :

* http://www.isoplotec.co.jp/HPGL/eHPGL.htm#-%20Plotter%20coordinate%20system

* http://paulbourke.net/dataformats/hpgl/