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  ./demo/canvas-001.js ./demo/canvas-002.js ./demo/canvas-003.js ./demo/canvas-004.js ./demo/canvas-005.js ./demo/canvas-006.js ./demo/canvas-007.js ./demo/canvas-008.js ./demo/canvas-009.js ./demo/canvas-010.js ./demo/canvas-011.js ./demo/canvas-012.js ./demo/canvas-013.js ./demo/canvas-014.js ./demo/canvas-015.js ./demo/canvas-015a.js ./demo/canvas-016.js ./demo/canvas-017.js ./demo/canvas-018.js ./demo/canvas-019.js ./demo/canvas-019a.js ./demo/canvas-020.js ./demo/canvas-021.js ./demo/canvas-022.js ./demo/canvas-023.js ./demo/canvas-024.js ./demo/canvas-025.js ./demo/canvas-026.js ./demo/canvas-027.js ./demo/canvas-028.js ./demo/canvas-029.js ./demo/canvas-030.js ./demo/canvas-031.js ./demo/canvas-032.js ./demo/canvas-033.js ./demo/canvas-034.js ./demo/canvas-035.js ./demo/canvas-036.js ./demo/canvas-037.js ./demo/canvas-038.js ./demo/canvas-039.js ./demo/canvas-040.js ./demo/canvas-041.js ./demo/canvas-042.js ./demo/canvas-043.js ./demo/canvas-044.js ./demo/canvas-045.js ./demo/canvas-046.js ./demo/canvas-047.js ./demo/canvas-048.js ./demo/canvas-049.js ./demo/canvas-050.js ./demo/canvas-051.js ./demo/canvas-052.js ./demo/canvas-053.js ./demo/canvas-054.js ./demo/canvas-055.js ./demo/canvas-056.js ./demo/canvas-058.js ./demo/canvas-059.js ./demo/canvas-060.js ./demo/canvas-061.js ./demo/canvas-062.js ./demo/canvas-063.js ./demo/canvas-064.js ./demo/core-001.js ./demo/delaunator-001.js ./demo/delaunator-002.js ./demo/dom-001.js ./demo/dom-002.js ./demo/dom-003.js ./demo/dom-004.js ./demo/dom-005.js ./demo/dom-006.js ./demo/dom-007.js ./demo/dom-008.js ./demo/dom-009.js ./demo/dom-010.js ./demo/dom-011.js ./demo/dom-012.js ./demo/dom-013.js ./demo/dom-015.js ./demo/dom-016.js ./demo/dom-017.js ./demo/dom-018.js ./demo/filters-001.js ./demo/filters-002.js ./demo/filters-002a.js ./demo/filters-003.js ./demo/filters-004.js ./demo/filters-005.js ./demo/filters-006.js ./demo/filters-007.js ./demo/filters-008.js ./demo/filters-009.js ./demo/filters-010.js ./demo/filters-011.js ./demo/filters-012.js ./demo/filters-013.js ./demo/filters-014.js ./demo/filters-015.js ./demo/filters-016.js ./demo/filters-017.js ./demo/filters-018.js ./demo/filters-019.js ./demo/filters-020.js ./demo/filters-021.js ./demo/filters-022.js ./demo/filters-023.js ./demo/filters-024.js ./demo/filters-025.js ./demo/filters-026.js ./demo/filters-027.js ./demo/filters-028.js ./demo/filters-101.js ./demo/filters-102.js ./demo/filters-103.js ./demo/filters-104.js ./demo/filters-105.js ./demo/filters-501.js ./demo/filters-502.js ./demo/filters-503.js ./demo/filters-504.js ./demo/filters-505.js ./demo/mediapipe-001.js ./demo/mediapipe-002.js ./demo/mediapipe-003.js ./demo/modules-001.js ./demo/modules-002.js ./demo/modules-003.js ./demo/modules-004.js ./demo/modules-005.js ./demo/modules-006.js ./demo/packets-001.js ./demo/packets-002.js ./demo/particles-001.js ./demo/particles-002.js ./demo/particles-003.js ./demo/particles-004.js ./demo/particles-005.js ./demo/particles-006.js ./demo/particles-007.js ./demo/particles-008.js ./demo/particles-009.js ./demo/particles-010.js ./demo/particles-011.js ./demo/particles-012.js ./demo/particles-013.js ./demo/particles-014.js ./demo/particles-015.js ./demo/particles-016.js ./demo/rapier-001.js ./demo/snippets-001.js ./demo/snippets-002.js ./demo/snippets-003.js ./demo/snippets-004.js ./demo/snippets-005.js ./demo/snippets-006.js ./demo/tensorflow-001.js ./demo/tensorflow-002.js ./demo/utilities.js

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  # Demo Filters 505

  SVG-based filter example: noise

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  Run code

      import * as scrawl from '../source/scrawl.js';

      import { reportSpeed } from './utilities.js';

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  #### Scene setup

      const canvas = scrawl.library.canvas.mycanvas;

      scrawl.importDomImage('.flowers');

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  Create the target entity

      scrawl.makePicture({

          name: 'base-piccy',

          asset: 'iris',

          width: '100%',
          height: '100%',

          copyWidth: '100%',
          copyHeight: '100%',

          method: 'fill',

          filter: 'url(#svg-noise)',
      });

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  #### SVG filter

  We create the filter in the HTML script, not here:

      <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
        <filter id="svg-noise">
          <feTurbulence type="fractalNoise" baseFrequency="0.01 0.04" result="NOISE" numOctaves="2" />
          <feDisplacementMap in="SourceGraphic" in2="NOISE" scale="20" xChannelSelector="R" yChannelSelector="R"></feDisplacementMap>
        </filter>
      </svg>

      const bfx = document.querySelector('#bfx'),
          bfy = document.querySelector('#bfy'),
          octaves = document.querySelector('#octaves'),
          scale = document.querySelector('#scale'),
          xChannelSelector = document.querySelector('#xChannelSelector'),
          yChannelSelector = document.querySelector('#yChannelSelector'),
          feTurbulence = document.querySelector('feTurbulence'),
          feDisplacementMap = document.querySelector('feDisplacementMap');

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  @ts-expect-error

      bfx.value = 0.01;

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  @ts-expect-error

      bfy.value = 0.04;

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  @ts-expect-error

      octaves.value = 2;

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  @ts-expect-error

      scale.value = 20;

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  @ts-expect-error

      xChannelSelector.options.selectedIndex = 0;

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  @ts-expect-error

      yChannelSelector.options.selectedIndex = 0;

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  #### Scene animation

  Function to display frames-per-second data, and other information relevant to the demo

      const report = reportSpeed('#reportmessage', function () {

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  @ts-expect-error

          return `<filter id="svg-noise">\n  <feTurbulence type="fractalNoise" baseFrequency="${bfx.value} ${bfy.value}" result="NOISE" numOctaves="${octaves.value}" />\n  <feDisplacementMap in="SourceGraphic" in2="NOISE" scale="${scale.value}" xChannelSelector="${xChannelSelector.value}" yChannelSelector="${yChannelSelector.value}"></feDisplacementMap>\n</filter>`;
      });

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  Create the Display cycle animation

      scrawl.makeRender({

          name: "demo-animation",
          target: canvas,
          afterShow: report,
      });

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  #### User interaction

  Setup form functionality @ts-expect-error

      const baseFrequency = () => feTurbulence.setAttribute('baseFrequency', `${bfx.value} ${bfy.value}`);
      scrawl.addNativeListener(['input', 'change'], baseFrequency, '.baseFreq');

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  @ts-expect-error

      const numOctaves = () => feTurbulence.setAttribute('numOctaves', octaves.value);
      scrawl.addNativeListener(['input', 'change'], numOctaves, '#octaves');

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  @ts-expect-error

      const dmScale = () => feDisplacementMap.setAttribute('scale', scale.value);
      scrawl.addNativeListener(['input', 'change'], dmScale, '#scale');

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  @ts-expect-error

      const dmX = () => feDisplacementMap.setAttribute('xChannelSelector', xChannelSelector.value);
      scrawl.addNativeListener(['input', 'change'], dmX, '#xChannelSelector');

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  @ts-expect-error

      const dmY = () => feDisplacementMap.setAttribute('yChannelSelector', yChannelSelector.value);
      scrawl.addNativeListener(['input', 'change'], dmY, '#yChannelSelector');

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  #### Development and testing

      console.log(scrawl.library);