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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-016.js ./demo/canvas-017.js ./demo/canvas-018.js ./demo/canvas-019.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/component-001.js ./demo/component-002.js ./demo/component-003.js ./demo/component-004.js ./demo/component-005.js ./demo/component-006.js ./demo/component-007.js ./demo/core-001.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-014a.js ./demo/dom-014b.js ./demo/dom-014c.js ./demo/dom-015.js ./demo/dom-016.js ./demo/filters-001.js ./demo/filters-002.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-501.js ./demo/filters-502.js ./demo/filters-503.js ./demo/filters-504.js ./demo/filters-505.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/temp-001.js ./demo/temp-inkscapeSvgFilters.js
  • ¶

    Demo Canvas 045

    Use clipping entitys as pivots; clipping entitys and cascade events

  • ¶

    Run code

    import scrawl from '../source/scrawl.js';
  • ¶

    Scene setup

    scrawl.importDomImage('.ohara-koson')
    
    const canvas = scrawl.library.canvas.mycanvas;
  • ¶

    First interaction - when user moves their mouse across the bird in its bough, wheels will spin

    const spinFactory = function (name, radius, order, duration, clockwise) {
    
        scrawl.makeGroup({
            name: `${name}-group`,
            host: canvas.base.name,
            order,
        });
    
        const clipper = scrawl.makeWheel({
            name: `${name}-clip-${radius}`,
            group: `${name}-group`,
            start: [200, 250],
            handle: ['center', 'center'],
            radius,
            method: 'clip',
    
            onEnter: function () {
                if (!tween.isRunning()) tween.run();
            },
    
            onLeave: function () {
                if (!tween.isRunning()) tween.run();
            },
        });
    
        const tween = scrawl.makeTween({
            name: `${name}-tween-${radius}`,
            targets: `${name}-clip-${radius}`,
            duration,
            definitions: [
                {
                    attribute: 'roll',
                    start: (clockwise) ? 0 : 360,
                    end: (clockwise) ? 360 : 0,
                    engine: 'easeOutIn',
                },
            ],
        });
    
        scrawl.makePicture({
            name: `${name}-hoop-${radius}`,
            group: `${name}-group`,
            asset: 'songbird',
    
            pivot: `${name}-clip-${radius}`,
            addPivotRotation: true,
            lockTo: 'pivot',
    
            handle: ['center', 'center'],
            dimensions: [radius * 2, radius * 2],
            copyDimensions: [radius * 2, radius * 2],
            copyStart: [200 - radius, 250 - radius],
        });
        return clipper;
    }
    
    const outer = spinFactory('outer-ring', 170, 1, '4s', true);
    const middleThin = spinFactory('thin-ring', 130, 2, '2.6s', true);
    const middleThick = spinFactory('thick-ring', 120, 3, '5.3s', false);
    const inner = spinFactory('inner-ring', 60, 4, '4s', true);
    const center = spinFactory('center', 20, 5, '4s', false);
  • ¶

    Second interaction - when the user moves their mouse across the signature, details about the painting will fade into view

    scrawl.makePhrase({
      name: 'painting-details',
      text: `Songbird and flowering camellia §GRAY§(1910 - 1930)
    §ITALIC§Ohara Koson (Japanese, 1877-1945)`,
      font: '15px Arial, sans-serif',
      start: ['10%', '72%'],
      width: '80%',
      globalAlpha: 0,
      order: 8,
    }).addSectionClass('GRAY', { fill: 'gray' });
    
    const detailsTween = scrawl.makeTween({
      name: 'show-details',
      targets: 'painting-details',
      duration: 5000,
      cycles: 2,
      reverseOnCycleEnd: true,
      definitions: [
        {
          attribute: 'globalAlpha',
          start: 0,
          end: 1,
          engine: 'easeIn5',
        },
      ],
    });
    
    scrawl.makeBlock({
      name: 'details-trigger',
      start: ['72%', '76%'],
      dimensions: ['12%', '16%'],
      method: 'none',
      onEnter: function () { 
        if (!detailsTween.isRunning()) detailsTween.run();
      },
    });
  • ¶

    Complete the painting by adding in the non-interactive bits

    scrawl.makePicture({
      name: 'koson-songbird',
      asset: 'songbird',
      dimensions: ['100%', '100%'],
      copyDimensions: ['100%', '100%'],
      globalCompositeOperation: 'destination-over',
      order: 10,
    });
  • ¶

    Scene animation

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

    const report = function () {
    
        let testTicker = Date.now(),
            testTime, testNow,
            testMessage = document.querySelector('#reportmessage');
    
        return function () {
    
            testNow = Date.now();
            testTime = testNow - testTicker;
            testTicker = testNow;
    
            testMessage.textContent = `Screen refresh: ${Math.ceil(testTime)}ms; fps: ${Math.floor(1000 / testTime)}`;
        };
    }();
  • ¶

    Create the Display cycle animation

    const demoAnimation = scrawl.makeRender({
    
        name: "demo-animation",
        target: canvas,
        afterShow: report,
    });
  • ¶

    User interaction

    scrawl.addListener('move', () => canvas.cascadeEventAction('move'), canvas.domElement);
  • ¶

    Development and testing

    console.log(scrawl.library);