@svg-drawing/animation

svg drawing library.

Usage no npm install needed!

<script type="module">
  import svgDrawingAnimation from 'https://cdn.skypack.dev/@svg-drawing/animation';
</script>

README

@svg-drawing/animation

npm version npm download

Install

npm

yarn add @svg-drawing/animation
# or
# npm i @svg-drawing/animation

How to use

Example code is here

import { SvgDrawing } from '@svg-drawing/core'
import { SvgAnimation } from '@svg-drawing/animation'
// Render drawing area. omitted the description
const draw = new SvgDrawing(el)

// Render animation
// It is resized to fit the rendering area as well as the SvgDrawing area.
const anim = new SvgAnimation(animEl, {
  ms: 20
})

// Example drawing animation.
// Callback function to set SvgAnimation
// Since the Path Object before animation is passed as an argument, it is converted and returned.

const setupAnimation = () => {
  // Copy drawwing data.
  // You can also use `parseSVGElement` or `parseSVGString`.
  // anim.renderer.svg.parseSVGElement(document.getElementByID('targetSvg'))
  // draw.renderer.svg.parseSVGString('<svg width="100" height="100"><path fill="#f00" stroke="#00f"stroke-width="4" d="M 10 10 L 20 20 C 30 30 50 30 70 30 Z"></path></svg>')
  anim.svg.copy(draw.svg)

  // Sets the animation callback function. `fid` is number of frame index.
  // It repeat times number of total commands. You can change the number of repeats as an option.
  anim.setAnimation(
    (paths, fid) => {
      let dispNum = fid
      const update = []
      for (let i = 0; i < paths.length; i += 1) {
        if (count < paths[i].commands.length) {
          paths[i].commands = paths[i].commands.slice(0, dispNum)
          update.push(paths[i])
          break
        }
        dispNum -= paths[i].commands.length
        update.push(paths[i])
      }
      return update
    }

    // The default value for the option. It works the same without writing.
    // This option cannot be used before version 2. When setting the number of frames, you need to have a global variable used in the animation function
    {
      frames: anim.paths.reduce((l, p) => l + p.commands.length, 0), // The number of frames in the animation.
      repeatCount: 'indefinete' // Set repeatCount attribute  to animate element
      ms: 20 // Set seconds per frame
    }
  )
}


// Animation Start
const start = document.getElementById('start')
start.onclick = () => {
  // load draw data
  loadSvgAnimation()

  // Method to animate Svg with JavaScript
  anim.start()

  // Or use SVGAnimateElement.
  anim.renderer.el.replaceChild(anim.toElement(), anim.renderer.el.childNodes[0])
  console.log(anim.toElement()) // <svg height="100" version="1.1" width="100" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><path d="M 10 10 L 20 20 C 30 30 50 30 70 30 Z" fill="#f00" id="t0" stroke="#00f" stroke-linecap="round" stroke-linejoin="round" stroke-width="4"><animateattributeName="d" dur="240ms" keyTimes="0;0.25;0.5;0.75;1" repeatCount="indefinite" values="M 10 10 L 20 20 C 30 30 50 30 70 30 Z;M 10 10;M 10 10;M 10 10 L 20 20;M 10 10 L 20 20 C 30 30 50 30 70 30" /></path></svg>
}

// Animation Stop
const stop = document.getElementById('stop')
stop.onclick = () => {
  // Stop Animation.
  anim.stop()
  // Restore Svg before animation.
  anim.restore()
}

// Download animtaion svg.
const download = document.getElementById('download')
download.onclick = () => {
  setupAnimation()
  anim.download()
}

const anim = new SvgAnimation(el)

// Property `ms` can be changed to set seconds per frame. `ms` is mili seconds.
// Can be changed during animation
anim.ms = 50

// Animation Start
anim.start()
// Animation Stop
anim.stop()
// Return to Svg before animation
anim.restore()

/**
 * Only version 3 or later is supported
 */
// Creata animation svg element.
anim.toElement()
// Download animation svg element.
anim.download()

Animation example

First load any SVG into SvgAnimation.

const anim = new SvgAnimation(el, { ms: 200 })

anim.renderer.svg.parseSVGString(
  `<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="802" height="202"><path stroke-width="5" fill="none" stroke="black" stroke-linecap="round" stroke-linejoin="round" d="M 79.390625 66.94140625 C 79.16 66.72 79.01 66.4 78.22 65.85 C 77.43 65.3 76.4 64.58 75.46 64.18 C 74.52 63.78 74.48 64.2 73.52 63.84 C 72.56 63.48 71.8 62.89 70.67 62.39 C 69.54 61.89 69.92 61.7 67.89 61.33 C 65.86 60.96 62.74 60.77 60.51 60.54 C 58.28 60.31 58.52 60.27 56.76 60.2 C 55 60.13 53.46 60.2 51.71 60.2 C 49.96 60.2 50.24 59.96 48.02 60.2 C 45.8 60.44 42.64 60.72 40.6 61.38 C 38.56 62.04 39.03 62.58 37.8 63.52 C 36.57 64.46 36.16 64.41 34.47 66.1 C 32.78 67.79 30.64 70.15 29.33 71.96 C 28.02 73.77 28.51 73.65 27.92 75.13 C 27.33 76.61 26.92 77.67 26.38 79.36 C 25.84 81.05 25.69 81.63 25.24 83.57 C 24.79 85.51 24.36 86.59 24.14 89.06 C 23.92 91.53 24.14 93.83 24.14 95.94 C 24.14 98.05 23.78 98.32 24.14 99.62 C 24.5 100.92 24.87 101.28 25.92 102.46 C 26.97 103.64 26.55 103.54 29.37 105.51 C 32.19 107.48 36.84 110.34 40.01 112.32 C 43.18 114.3 43.25 114.2 45.22 115.4 C 47.19 116.6 47.82 117.03 49.86 118.32 C 51.9 119.61 52.67 119.82 55.4 121.85 C 58.13 123.88 60.55 125.54 63.53 128.46 C 66.51 131.38 68.41 133.97 70.32 136.44 C 72.23 138.91 72.11 139.02 73.09 140.8 C 74.07 142.58 74.34 142.63 75.23 145.32 C 76.12 148.01 77.02 151.72 77.56 154.24 C 78.1 156.76 77.86 156.56 77.93 157.93 C 78 159.3 78.07 159.93 77.93 161.11 C 77.79 162.29 77.9 162.63 77.24 163.84 C 76.58 165.05 76.99 164.91 74.65 167.16 C 72.31 169.41 68.08 173.08 65.52 175.11 C 62.96 177.14 63.41 176.56 61.83 177.31 C 60.25 178.06 60.39 178.21 57.6 178.84 C 54.81 179.47 50.76 180.15 47.86 180.48 C 44.96 180.81 45 180.56 43.1 180.48 C 41.2 180.4 40.03 180.53 38.34 180.08 C 36.65 179.63 36.04 179.12 34.64 178.23 C 33.24 177.34 33.03 177.28 31.33 175.65 C 29.63 174.02 27.5 171.78 26.15 170.1 C 24.8 168.42 24.99 168.05 24.56 167.25 C 24.13 166.45 24.1 166.44 23.98 166.1 C 23.86 165.76 24.03 165.68 23.98 165.57 C 23.93 165.46 23.77 165.57 23.72 165.57"></path><path stroke-width="5" fill="none" stroke="black" stroke-linecap="round" stroke-linejoin="round" d="M 101.09765625 74.73828125 C 101.1 75.01 101.1 75.27 101.1 76.1 C 101.1 76.93 101.1 77.27 101.1 78.88 C 101.1 80.49 100.68 76.86 101.1 84.14 C 101.52 91.42 102.4 105.74 103.2 115.29 C 104 124.84 104.28 126.5 105.09 131.9 C 105.9 137.3 106.62 138.49 107.23 142.29 C 107.84 146.09 107.43 146.37 108.16 150.9 C 108.89 155.43 110.04 161.18 110.9 164.94 C 111.76 168.7 111.94 168.01 112.48 169.7 C 113.02 171.39 113.23 172.1 113.59 173.38 C 113.95 174.66 113.9 175.03 114.27 176.11 C 114.64 177.19 115.15 178.16 115.43 178.8 C 115.71 179.44 115.63 179.11 115.68 179.32 C 115.73 179.53 115.68 179.77 115.68 179.83 C 115.68 179.89 115.68 179.75 115.68 179.6 C 115.68 179.45 115.68 179.45 115.68 179.07 C 115.68 178.69 115.68 178.34 115.68 177.68 C 115.68 177.02 115.6 177.12 115.68 175.79 C 115.76 174.46 115.56 173.3 116.08 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)

Shaking animation.

shake animation svg

anim.setAnimation(
  paths => {
    const range = 5
    const randomShaking = () => Math.random() * range - range / 2
    for (let i = 0; i < paths.length; i += 1) {
      paths[i].commands = paths[i].commands.map((c) => {
        c.point = c.point?.add(new Point(randomShaking(), randomShaking()))
        c.cl = c.cl?.add(new Point(randomShaking(), randomShaking()))
        c.cr = c.cr?.add(new Point(randomShaking(), randomShaking()))
        return c
      })
    }
    return paths
  }
  {
    frames: 3
  }
)

Colorful animation

shake animation svg

const colorfulList = [
  '#F44336',
  '#E91E63',
  '#9C27B0',
  '#673AB7',
  '#3F51B5',
  '#2196F3',
  '#00BCD4',
  '#009688',
  '#4CAF50',
  '#8BC34A',
  '#CDDC39',
  '#FFEB3B',
  '#FFC107',
  '#FF9800',
  '#FF5722'
]

anim.setAnimation(
  (paths, fid) => {
    for (let i = 0; i < paths.length; i += 1) {
      paths[i].attrs.stroke = colorfulList[fid % colorfulList.length]
      paths[i].attrs.fill = colorfulList[(fid + 4) % colorfulList.length]
    }
    return paths
  }
  {
    frames: colorfulList.length
  }
)