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wtf is polydraw?

travisperson/polydraw — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2014-03-02

Audience · generalComplexity · 1/5DormantSetup · easy

TL;DR

A simple browser tool where you click points on an HTML5 canvas to draw polygons, with no setup or dependencies required.

Mindmap

mindmap
  root((repo))
    What it does
      Draws polygons
      Click to add points
      Runs in browser
      No build step
    Tech stack
      HTML5
      Canvas
      JavaScript
    Use cases
      Learn canvas basics
      Prototype drawing tools
      Explore polygon geometry
    Audience
      Web graphics students
      Designers and artists

Code map

Detail Auto

An interactive map of this repo's files and how they connect — its source is parsed live in your browser. Click Visualize to build it.

filefunction / class

Why would anyone build with this?

REASON 1

Open index.html and click points on the canvas to draw a polygon.

REASON 2

Learn how HTML5 canvas handles interactive drawing as a student.

REASON 3

Use it as a starting point to prototype a more complex drawing application.

REASON 4

Study the code to understand how browsers render geometric shapes.

What's in the stack?

HTML5CanvasJavaScript

How it stacks up

travisperson/polydraw0verflowme/alarm-clock0verflowme/seclists
LanguageCSS
Last pushed2014-03-022022-10-032020-05-03
MaintenanceDormantDormantDormant
Setup difficultyeasyeasyeasy
Complexity1/52/51/5
Audiencegeneralvibe coderops devops

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · easy Time to first run · 5min

No build process or dependencies, just open index.html in a browser.

Wtf does this do

Polydraw is a straightforward web tool that lets you draw polygons (shapes with multiple sides) directly in your web browser using HTML5 canvas. It's a visual, interactive demo, no complicated setup required. When you open the index.html file in your browser, you get a blank canvas where you can click to place points. Each point you add becomes a vertex of a polygon, and the browser automatically connects them to form the shape. It's meant to be a simple, hands-on way to see how polygon drawing works on the web. This kind of project is useful for a few different audiences. A student learning web graphics can use it to understand how HTML5 canvas works and how to build interactive drawing tools. A designer or artist might use it as a starting point to prototype a more complex drawing application. Or anyone curious about how browsers handle geometric shapes could tinker with the code to learn the fundamentals. The appeal here is simplicity. There's no build process, no dependencies to install, no complex configuration, just open a file and start drawing. That makes it a great educational resource or lightweight demo, though the README keeps details minimal and doesn't explain what features are actually included beyond the core polygon-drawing concept.

Yoink these prompts

Prompt 1
Explain how this project turns clicked points into a connected polygon on an HTML5 canvas.
Prompt 2
Help me extend polydraw so I can drag existing points to reshape a polygon.
Prompt 3
Show me how to add color fill to the polygons drawn in this project.
Prompt 4
Walk me through the HTML5 canvas basics used in this file so I can build my own drawing demo.

Frequently asked questions

wtf is polydraw?

A simple browser tool where you click points on an HTML5 canvas to draw polygons, with no setup or dependencies required.

Is polydraw actively maintained?

Dormant — no commits in 2+ years (last push 2014-03-02).

How hard is polydraw to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is polydraw for?

Mainly general.

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