https://github.com/kongnet/turtle

Simulate Turtle Geometry
https://github.com/kongnet/turtle

animation fractal js logo turtle

Last synced: 2 months ago
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Simulate Turtle Geometry

• Host: GitHub
• URL: https://github.com/kongnet/turtle
• Owner: kongnet
• License: mit
• Created: 2023-07-29T03:40:07.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-07-07T13:36:24.000Z (7 months ago)
• Last Synced: 2024-07-07T14:52:24.177Z (7 months ago)
• Topics: animation, fractal, js, logo, turtle
• Language: HTML
• Homepage:
• Size: 915 KB
• Stars: 11
• Watchers: 1
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
# Turtle

> I enjoy the turtle geometry, so I implemented a simplified version using vanilla JavaScript.

> Simulate Turtle Geometry

- fd() forward

- bk() backward

- rt() right

- lt() left

- pu() penup

- pd() pendown

- repeat()

- setxy() put the turtle at coordinate(x, y)

- home() bring the turtle at the center

- cs() clearscreen

> run() vs go(), go() can clear atction queue, run() not

```javascript

const t = new Turtle({ debug: false })

t.fd(10).rt(90).repeat(4).go() // draw a square

```

```javascript

/*

  combine t0, t1

  t0,t1 can play solo, use t.to('t0').run()

*/

const t = new Turtle({ debug: false })

t.to('t0').fd(0.1).rt(2).repeat(90)

t.to('t1').fd(0.1).lt(2).repeat(90)

t.to().add('t0').add('t1').rt(90).repeat(4).rt(36).repeat(10).go()

console.log(t.list) // ['_mainproc', 't0', 't1']

```

- demo1 regular polygon

- demo2 regular star polygon

- demo3 constant velocity helix + golden spiral

- demo4 variable speed helix

- demo5 Koch curve

- demo6 Fractal Tree

- demo7 Sierpinski triangle

- demo8 Leaf

![screenshot](https://github.com/kongnet/turtle/blob/main/screenshot/s1.png)

## Animation

```javascript

let t = new Turtle({ debug: false, animate: 2 }) // draw speed

t.to('t0').fd(0.1).rt(2).repeat(90) // combine

t.to('t1').fd(0.1).lt(2).repeat(90)

t.to().add('t0').add('t1').rt(90).repeat(4).rt(36).repeat(10).go()

```

![Animation](https://github.com/kongnet/turtle/blob/main/screenshot/s3.gif)

## turtle-maze.html

![Maze](https://github.com/kongnet/turtle/blob/main/screenshot/s2.jpg)