circles.jsv0.2.0

Circle user interface library targeted for artificial life simulations.

Install

Installation

Browsers

<script src="scripts/circles.js"></script>

CommonJS & Node.js

$ npm install circles
---
> var circles = require('circles');

API

circles.createWorld()

Creates canvas element and required styles. The element resizes automatically on window resize.

var world = circles.createWorld()

world.createCircle(x, y, r, color)

Position and radius in pixels. Color can be any canvas fill style, e.g. '#ff0000' or 'red'

var circle = world.createCircle(100, 200, 20, 'red')

world.searchInside(x, y, r)

Return array of circles inside the specified circle area. Use this for collision detection.

world.on(event, handler)

Possible events: 'tap'

world.off(event)

Remove event handler.

circle.moveTo(x, y)

circle.moveBy(dx, dy)

circle.movePolar(distance, angle)

Move circle to the specified direction. Angle in radians.

circle.moveToward(x, y, distance)

Move circle toward the specified point.

circle.on(event, handler)

Possible events: 'tap'

circle.off(event)

Remove event handler.

Notes for developers

Run tests with $ npm test.

Build with $ npm run build.

Serve with $ npm start. Then see localhost:8000.

Todo

• tests

Versioning

Semantic Versioning 2.0.0

License

MIT License