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              <!--

Twitter: @michaeltheory / @active_theory
Internet: https://activetheory.net

Move your mouse to distort the fabric of space!

-->
            
          
!
            
              body, html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
            
          
!
            
              Class(function Grid() {
    Inherit(this, Controller);
    var _this = this;
    var $container;
    var _stage, _renderer, _layout;

    //*** Constructor
    (function () {
        Mouse.capture();
        initContainer();
        initPixi();
        addListeners();
        initViews();
        Render.startRender(loop);
    })();

    function initContainer() {
        $container = _this.container;
        $container.size('100%').bg('#000');
        Stage.add($container);
      
        if (Mobile.phone && Stage.width > 768) {
            Mobile.phone = false;
            Mobile.tablet = true;
        }
    }

    function initPixi() {
        _stage = new PIXI.Stage();
        _renderer = new PIXI.WebGLRenderer(Stage.width, Stage.height);
        $container.add(_renderer.view);
    }

    function initViews() {
        _layout = _this.initClass(GridLayout);
        _stage.addChild(_layout.sprite);
    }

    function loop() {
        _renderer.render(_stage);
    }

    //*** Event handlers
    function addListeners() {
        _this.events.subscribe(HydraEvents.RESIZE, resizeHandler);
    }

    function resizeHandler() {
        _renderer.resize(Stage.width, Stage.height);
        _stage.removeChild(_layout.sprite);
        _layout.resize();
        _stage.addChild(_layout.sprite);
    }

    //*** Public methods

});

Class(function GridLayout() {
    Inherit(this, Component);
    var _this = this;
    var _rgb, _texture;

    var _items = new LinkedList();

    this.sprite = new PIXI.DisplayObjectContainer();

    //*** Constructor
    (function () {
        Global.HUE = 0;
        Global.SATURATION = 0;
        Global.RADIUS = 100;

        initTexture();
        initFilters();
        initGrid();
        addListeners();
        Render.startRender(loop);

        Mouse.x = Stage.width/2;
        Mouse.y = Stage.height/2;
        touchEnd();
    })();

    function initFilters() {
        _rgb = new PIXI.RGBSplitFilter();
        _rgb.uniforms.red.value = {x: 1, y: 3};
        _rgb.uniforms.green.value = {x: 2, y: 2};
        _rgb.uniforms.blue.value = {x: 4, y: 1};
    }

    function initTexture() {
        var canvas = new Canvas(50, 50);
        var context = canvas.context;
        context.fillStyle = '#fff';
        context.fillRect(0, 19, 50, 12);
        context.fillRect(19, 0, 12, 50);

        _texture = PIXI.Texture.fromCanvas(canvas.div);
    }

    function initGrid() {
        var graphics = new PIXI.Graphics();
        graphics.beginFill(0x0000, 1);
        graphics.drawRect(0, 0, Stage.width, Stage.height);
        graphics.endFill();
        _this.sprite.addChild(graphics);

        var spacing = Mobile.tablet ? 30 : 25;
        var perc = Mobile.phone ? 1.6 : 1.3;
        var numX = Stage.width*perc / spacing;
        var numY = Stage.height*perc / spacing;
        var offsetX = Stage.width * (Mobile.phone ? 0.3 : 0.1);
        var offsetY = Stage.height * (Mobile.phone ? 0.25 : 0.15);
        for (var x = 0; x < numX; x++) {
            for (var y = 0; y < numY; y++) {
                var px = spacing * x;
                var py = spacing * y;
                var item = new GridItem(px-offsetX, py-offsetY, _texture);
                _this.sprite.addChild(item.sprite);
                _items.push(item);
            }
        }

        if (!Device.mobile) _this.sprite.filters = [_rgb];
    }

    function loop(t) {
        var hue = Mouse.x / Stage.width;
        var sat = Utils.convertRange(Mouse.y / Stage.height, 0, 1, 0.3, 0.6);
        Global.HUE += (hue - Global.HUE) * 0.2;
        Global.SATURATION += (sat - Global.SATURATION) * 0.2;

        var i = _items.start();
        while (i) {
            i.update(Mouse);
            i = _items.next();
        }
    }

    //*** Event handlers
    function addListeners() {
        Stage.bind('touchend', touchEnd);
    }

    function touchEnd() {
        Global.RADIUS = 200;
        setTimeout(function() {
            Global.RADIUS = 100;
        }, 100);
    }

    //*** Public methods
    this.resize = function() {
        _this.sprite = new PIXI.DisplayObjectContainer();
        _items.empty();
        initGrid();
    }
});

Class(function GridItem(_x, _y, _texture) {
    Inherit(this, Component);
    var _this = this;

    var SPRING = 0.1;
    var FRICTION = 0.92;
    var RADIUS = 100;

    var _color = new Color();

    var _target = new Vector2();
    var _vec = new Vector2();
    var _origin = new Vector2(_x, _y);

    this.sprite = null;

    this.position = new Vector2(_x, _y);
    this.velocity = new Vector2();

    //*** Constructor
    (function () {
        initSprite();
    })();

    function initSprite() {
        _this.sprite = new PIXI.Sprite(_texture);
        _this.sprite.position.x = _x;
        _this.sprite.position.y = _y;
        _this.sprite.anchor.x = _this.sprite.anchor.y = 0.5;
        _this.sprite.width =  _this.sprite.height = Mobile.tablet ? 12 : 9;
        _this.sprite.blendMode = PIXI.blendModes.ADD;
    }

    //*** Event handlers

    //*** Public methods
    this.update = function(touch) {
        _vec.copyFrom(_this.position).sub(touch);
        var dist = _vec.length();

        var radius = Global.RADIUS;
        if (Mobile.phone) radius /= 2;
        if (Mobile.tablet) radius /= 1.5;

        var angle = Math.atan2(_vec.y, _vec.x);
        var amount = Utils.clamp(Utils.convertRange(dist, 0, radius, 100, 0), -100, 100);
        _target.copyFrom(_origin).addAngleRadius(angle, amount);

        _vec.copyFrom(_target).sub(this.position);
        _vec.multiply(SPRING);

        this.velocity.add(_vec);
        this.position.add(this.velocity);
        this.velocity.multiply(FRICTION);

        _vec.copyFrom(_this.position).sub(_origin);
        dist = _vec.length();
        var hue = Utils.clamp(Utils.convertRange(dist, 0, 300, Global.HUE - 0.1, Global.HUE + 0.4), 0, 1.2);
        _color.setHSL(hue, Global.SATURATION, 0.4);
        _this.sprite.tint = _color.getHex();

        this.position.copyTo(this.sprite.position);
    }
});

window.onload = function() {
    new Grid();
}
            
          
!
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