• 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
  • ¶

    Demo DOM 014 - third scene

    Load and run multiple scripts on same page

  • ¶

    Run code

    import scrawl from '../source/scrawl.js'
    
    let artefact = scrawl.library.artefact,
        stack = artefact.mystack,
        element = artefact.myelement,
        canvas = artefact.mycanvas3,
        cell = canvas.base;
    
    canvas.setAsCurrentCanvas();
    
    stack.set({
        width: 600,
        height:400,
        perspectiveZ: 1200,
    });
    
    
    canvas.set({
        width: '100%',
        height:'100%',
        backgroundColor: 'black',
    });
    
    cell.set({
        width: '100%',
        height:'100%',
    });
    
    let testers = scrawl.makeGroup({
    
        name: 'testers',
        host: 'mystack',
    });
    
    element.set({
    
        group: 'testers',
    
        startX: 300,
        startY: 200,
        handleX: 100,
        handleY: 100,
    
        width: 200,
        height: 200,
    
        roll: 10,
        pitch: 20,
        yaw: 30,
    
        css: {
            borderWidth: '6px',
        },
    
        collides: true,
    });
    
    let baseColor = 'aliceblue',
        highlightColor = 'red',
        gridSize = 40;
    
    let grid = scrawl.makeGroup({
    
        name: 'grid',
        host: cell.name,
    });
    
    for (let y = 0; y < 400; y += gridSize) {
    
        for (let x = 0; x < 600; x += gridSize) {
    
            scrawl.makeBlock({
    
                name: `grid-${x / gridSize}-${y / gridSize}`,
                group: 'grid',
    
                width: gridSize - 0.5,
                height: gridSize - 0.5,
                startX: x,
                startY: y,
    
                fillStyle: baseColor,
    
                method: 'fill',
            });
        }
    }
    
    scrawl.makeDragZone({
    
        zone: stack,
        collisionGroup: testers,
        endOn: ['up', 'leave'],
    });
    
    let checkHits = function () {
    
        let hits = [];
    
        return function () {
    
            hits.forEach(hit => hit.artefact.set({
                fillStyle: baseColor
            }));
    
            hits = grid.getArtefactCollisions(element);
    
            hits.forEach(hit => hit.artefact.set({
                fillStyle: highlightColor
            }));
        };
    }();
    
    let report = function () {
    
        let testTicker = Date.now(),
            testTime, testNow,
            testMessage = document.querySelector('#reportmessage3');
    
        return function () {
    
            testNow = Date.now();
            testTime = testNow - testTicker;
            testTicker = testNow;
    
            testMessage.textContent = `Animation threshhold set to 0.0
    - at least 1px of the stack must be visible for the animation to run
    Screen refresh: ${Math.ceil(testTime)}ms; fps: ${Math.floor(1000 / testTime)}`;
        };
    }();
    
    let animations = scrawl.makeRender({
    
        name: 'demo-animation3',
        target: [stack, canvas],
        afterCreated: () => element.set({ roll: 10.001 }),
        commence: checkHits,
        afterShow: report,
    });
    
    scrawl.observeAndUpdate({
    
        event: ['input', 'change'],
        origin: '.controlItem',
    
        target: element,
    
        useNativeListener: true,
        preventDefault: true,
    
        updates: {
            handle_xAbsolute: ['handleX', 'round'],
            handle_yAbsolute: ['handleY', 'round'],
    
            offset_xAbsolute: ['offsetX', 'round'],
            offset_yAbsolute: ['offsetY', 'round'],
    
            roll: ['roll', 'float'],
            pitch: ['pitch', 'float'],
            yaw: ['yaw', 'float'],
            scale: ['scale', 'float'],
    
            sensitivity: ['sensorSpacing', 'round'],
        },
    });
    
    scrawl.observeAndUpdate({
    
        event: ['input', 'change'],
        origin: '.controlItem',
    
        target: stack,
    
        useNativeListener: true,
        preventDefault: true,
    
        updates: {
            perspective: ['perspectiveZ', 'round'],
        },
    });
  • ¶

    Setup form

    document.querySelector('#sensitivity').value = 50;
    document.querySelector('#handle_xAbsolute').value = 100;
    document.querySelector('#handle_yAbsolute').value = 100;
    document.querySelector('#offset_xAbsolute').value = 0;
    document.querySelector('#offset_yAbsolute').value = 0;
    document.querySelector('#roll').value = 10;
    document.querySelector('#pitch').value = 20;
    document.querySelector('#yaw').value = 30;
    document.querySelector('#scale').value = 1;
    document.querySelector('#perspective').value = 1200;
  • ¶

    Switch animation on/off when at least 1px of stack is showing - this is standard ES16 Javascript, not part of Scrawl-canvas

    let observer = new IntersectionObserver((entries, observer) => {
    
        console.log('observer C starts', animations[0].name, animations[0].isRunning());
  • ¶

    We’re only observing the stack’s DOM element here, but we need to switch both the stack and the canvas animation renders on or off

        entries.forEach(entry => {
    
            if (entry.isIntersecting) animations.forEach(anim => !anim.isRunning() && anim.run());
            else if (!entry.isIntersecting) animations.forEach(anim => anim.isRunning() && anim.halt());
        });
    
        console.log('observer C completes', animations[0].name, animations[0].isRunning());
  • ¶

    The second IntersectionObserver argument is the options object

    • passing an empty object will set the threshold value to 0.0
    • which means if > 0px of the stack DOM element is visible, the animations will run
    }, {});
    observer.observe(stack.domElement);
    
    console.log('#014c', scrawl.library);