The curvejs from tanytree

curvejs's Introduction

Made curve a dancer in HTML5 canvas.

中文README

Demos

Usage

$ npm install curvejs

import curvejs from 'curvejs'

Or get it by the cdn and link curve.min.js in your HTML:

<script src="https://unpkg.com/[email protected]/dist/curve.min.js"></script>

Then start to dance:

var Stage = curvejs.Stage,
    Curve = curvejs.Curve,
    canvas = document.getElementById('myCanvas'),
    stage = new Stage(canvas),
    rd = function() {
        return -2 + Math.random() * 2
    }

var curve = new Curve({
    color: '#00FF00',
    points: [277, 327, 230, 314, 236, 326, 257, 326],
    data: [rd(), rd(), rd(), rd(), rd(), rd(), rd(), rd()],
    motion: function motion(points, data) {
      points.forEach(function (item, index) {
          points[index] += data[index]
      })
    }
})

stage.add(curve)

function tick(){
    stage.update()
    requestAnimationFrame(tick)
}

tick()

Using built-in motion

var curve = new Curve({
    points: [277, 327, 230, 314, 236, 326, 257, 326],
    data: {angle: 0, r:5 ,step:Math.PI / 50 },
    motion: curvejs.motion.dance
})

Submit your motion

In this motion directory, there are already some built-in motion. you can submit your motion and then create a pull request to the project.

Format and specification of your motion:

/**
 * move motion.
 *
 * @param {points}
 * @param {data}
 *      data rule example:
 *      [1, 0.2, -3, 0.7, 0.5, 0.3, -1, 1]
 */
export default function (points, data) {
    points.forEach(function (item, index) {
        points[index] += data[index]
    })
}