• Jump To … +
    ./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
  • dom-014a.js

  • ¶

    Demo DOM 014 - first scene

    Load and run multiple scripts on same page

  • ¶

    Run code

    import scrawl from '../source/scrawl.js'
    
    let canvas = scrawl.library.artefact.mycanvas1;
    canvas.setAsCurrentCanvas();
    
    canvas.setBase({
        backgroundColor: 'aliceblue',
    });
    
    let myPivot = scrawl.makeWheel({
        name: 'mouse-pivot',
        method: 'none',
    
        startX: 'center',
        startY: 'center',
    });
    
    let myblock = scrawl.makeBlock({
        name: 'base-block',
    
        width: 150,
        height: 100,
    
        handleX: 'center',
        handleY: 'center',
    
        offsetX: -140,
        offsetY: -50,
    
        pivot: 'mouse-pivot',
        lockTo: 'pivot',
    
        fillStyle: 'darkblue',
        strokeStyle: 'gold',
        method: 'fillAndDraw',
    
        lineWidth: 6,
        lineJoin: 'round',
    
        delta: {
            roll: 0.5,
        },
    });
    
    let mywheel = scrawl.makeWheel({
        name: 'base-wheel',
    
        radius: 60,
        startAngle: 35,
        endAngle: -35,
    
        handleX: 'center',
        handleY: 'center',
    
        offsetX: 140,
        offsetY: 50,
    
        pivot: 'mouse-pivot',
        lockTo: 'pivot',
    
        fillStyle: 'purple',
        strokeStyle: 'gold',
        method: 'fillAndDraw',
    
        lineWidth: 6,
        lineJoin: 'round',
    
        delta: {
            roll: -0.5,
        },
    });
    
    myblock.clone({
        name: 'pivot-block',
    
        height: 30,
    
        handleX: 'center',
        handleY: 'center',
    
        strokeStyle: 'red',
        lineWidth: 3,
        method: 'draw',
    
        pivot: 'base-block',
        lockTo: 'pivot',
    
        offsetX: 0,
        offsetY: 110,
        addPivotOffset: true,
    
        delta: {
            roll: 0,
        },
    
    }).clone({
        name: 'pivot-wheel',
    
        pivot: 'base-wheel',
        addPivotRotation: true,
    
        handleX: 0,
        handleY: '50%',
    
        offsetY: 0,
    
    }).clone({
        name: 'mimic-wheel',
    
        mimic: 'base-wheel',
        lockTo: 'mimic',
    
        width: 20,
        height: 20,
    
        handleX: 10,
        handleY: 10,
    
        strokeStyle: 'darkgreen',
    
        useMimicDimensions: true,
        useMimicScale: true,
        useMimicStart: true,
        useMimicHandle: true,
        useMimicOffset: true,
        useMimicRotation: true,
        useMimicFlip: true,
    
        addOwnDimensionsToMimic: true,
        addOwnScaleToMimic: false,
        addOwnStartToMimic: false,
        addOwnHandleToMimic: true,
        addOwnOffsetToMimic: false,
        addOwnRotationToMimic: false,
    });
    
    mywheel.clone({
        name: 'mimic-block',
    
        mimic: 'base-block',
        lockTo: 'mimic',
    
        width: 60,
    
        strokeStyle: 'darkgreen',
        lineWidth: 3,
        method: 'draw',
    
        useMimicDimensions: true,
        useMimicScale: true,
        useMimicStart: true,
        useMimicHandle: false,
        useMimicOffset: true,
        useMimicRotation: true,
    
        addOwnDimensionsToMimic: true,
        addOwnScaleToMimic: false,
        addOwnStartToMimic: false,
        addOwnHandleToMimic: false,
        addOwnOffsetToMimic: false,
        addOwnRotationToMimic: false,
    });
    
    let mouseCheck = function () {
    
        let active = false;
    
        return function () {
    
            if (canvas.here.active !== active) {
    
                active = canvas.here.active;
    
                myPivot.set({
                    lockTo: (active) ? 'mouse' : 'start'
                });
            }
        };
    }();
    
    let report = function () {
    
        let testTicker = Date.now(),
            testTime, testNow,
            testMessage = document.querySelector('#reportmessage1');
    
        return function () {
    
            testNow = Date.now();
            testTime = testNow - testTicker;
            testTicker = testNow;
    
            testMessage.textContent = `Animation threshhold set to 0.5
     - 50% of canvas must be visible for animation to run
    Screen refresh: ${Math.ceil(testTime)}ms; fps: ${Math.floor(1000 / testTime)}`;
        };
    }();
    
    let animation = scrawl.makeRender({
    
        name: 'demo-animation1',
        target: canvas,
        commence: mouseCheck,
        afterShow: report,
        delay: true
    });
  • ¶

    Switch animation on/off when at least 50% of canvas is showing - this is standard ES16 Javascript, not part of Scrawl-canvas

    let observer = new IntersectionObserver((entries, observer) => {
    
        entries.forEach(entry => {
    
            console.log('observer A starts', animation.name, animation.isRunning(), entry.intersectionRatio, entry.isIntersecting);
    
            if (entry.isIntersecting && !animation.isRunning()) animation.run();
            else if (!entry.isIntersecting && animation.isRunning()) animation.halt();
    
            console.log('observer A completes', animation.name, animation.isRunning(), entry.intersectionRatio, entry.isIntersecting);
        });
    }, { threshold: 0.5 });
    observer.observe(canvas.domElement);
    
    console.log('#014a', scrawl.library);