Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using it's URL and the proper URL extention.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <canvas id="canvas" resize></canvas>
              
            
!

CSS

              
                #canvas {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}

              
            
!

JS

              
                

namespace VerticalLines {
   
  console.clear();
  var log = console.log.bind(console);

  paper.setup(document.querySelector("#canvas"));

  var project = paper.project;
  var view = paper.view;
  
  var vw = view.bounds.width;
  var vh = view.bounds.height;
        
  var lines = [];
  var lineColor = "#b0adb5";
  var lineWidth = 1;
  
  var showPoints  = true;
  var showMoire   = true;  
  var yAxisLocked = true;  
  
  var lineSpacing  = 20;
  var pathSegments = 2;
  
  var snapDist    = 225;
  var repelDist   = 125;
  var snapDistSq  = snapDist  ** 2;
  var repelDistSq = repelDist ** 2;
  
  var duration     = 1.5;  
  var easePeriod   = 0.3;
  var easeStrength = 1.4;
  var elasticEase  = Elastic.easeOut.config(easeStrength, easePeriod);
      
  var smoothingNames = "Continuous,Centripetal,Geometric,Chordal,Uniform,None".split(",");  
  var smoothingTypes = [
    { type: "continuous" },
    { type: "catmull-rom", factor: 0.5 },
    { type: "geometric",   factor: 0.4 },
    { type: "catmull-rom", factor: 1 },
    { type: "catmull-rom", factor: 0 },
    { type: "geometric",   factor: 0 }
  ];
    
  var pathSmoothing = smoothingTypes[0];  
  
  var debouncedInit = _.debounce(init, 30);
   
  var center = new paper.Point(vw / 2, vh / 2);  
  var mouse  = { delta: new paper.Point(0, 0), point: center };
        
  var repellerRaster = null;
  var repeller = new paper.Shape.Circle({
    radius: repelDist,
    fillColor: "#2196f3",
    center
  });
  
  repeller.fillColor.alpha = 0.5;
  
  var pointShape = new paper.Path.Circle({
    center: [0, 0],
    radius: 4,
    fillColor: "#e91e63",    
    strokeColor: "#ce1956"
  });
  
  var pointSymbol = new paper.Symbol(pointShape.rasterize());
  pointShape.remove();
  
  var lineRaster = null;
  var lineSymbol = null;
  var lineShape  = new paper.Path({
    segments: [[0, 0], [0, vh]],
    strokeColor: lineColor,
    strokeWidth: lineWidth
  });
     
  var settings = QuickSettings.create(5, 5, "Settings");
  
  //
  // CREATE SETTINGS
  // ========================================================================
  function createSettings() {
        
    settings
      .addBoolean("Show Points", showPoints, value => {
        pointSymbol.definition.visible = showPoints = value;
      }) 
      .addBoolean("Lock Y-Axis", yAxisLocked, value => {
        yAxisLocked = value;
      })           
      .addBoolean("Moire Effect", showMoire, value => {
        showMoire = value;
      })
      .addRange("Line Spacing", 3, 250, lineSpacing, 1, value => {
        lineSpacing = value;
        debouncedInit();
      })
      .addRange("Path Segments", 2, 25, pathSegments, 1, value => {
        pathSegments = value;
        debouncedInit();
      })
      .addRange("Repel Distance", 5, 400, repelDist, 1, value => {
        repeller.radius = repelDist = value;
        repelDistSq = repelDist ** 2;    
        if (repelDist > snapDist) {
          settings.setRangeValue("Snap Distance", repelDist + 1);
        }
        rasterizeRepeller();
      })
      .addRange("Snap Distance", 5, 400, snapDist, 1, value => {
        snapDist = value;
        snapDistSq = snapDist ** 2;
        if (snapDist < repelDist) {
          settings.setRangeValue("Repel Distance", snapDist - 1);
        }
      })    
      .addRange("Duration", 0.1, 6, duration, 0.1, value => {
        duration = value;
      })
      .addRange("Wave Strength", 1, 2.5, easeStrength, 0.1, value => {
        easeStrength = value;
        elasticEase = Elastic.easeOut.config(easeStrength, easePeriod);
      })
      .addRange("Wave Length", 0.1, 1, easePeriod, 0.1, value => {
        easePeriod = value;
        elasticEase = Elastic.easeOut.config(easeStrength, easePeriod);
      })
      .addDropDown("Path Smoothing", smoothingNames, value => {
        pathSmoothing = smoothingTypes[value.index];
      })    
  }
  
  //
  // INIT
  // ========================================================================
  function init() {
    
    vw = view.bounds.width;
    vh = view.bounds.height;
    
    for (var line of lines) {
      line.destroy();
    }
    
    lines = [];
    
    rasterizeLine();
    
    for (var i = 0, x = 0; x <= vw; i++, x += lineSpacing) {      
      lines.push(new Line(i, x));
    }
        
    repellerRaster.bringToFront();
  }
    
  
  //
  // CONTROL POINT
  // ========================================================================
  class ControlPoint {
              
    shape = null;  
    animation = null;
    connected = false;    
  
    constructor(public index, public line, public path, public start, canMove) {
      
      if (canMove) {       
        this.shape = pointSymbol.place(start);
        this.shape.parent = path.parent;
        this.animation = new TimelineLite();
      }
    }
  
    destroy() {
      this.animation && this.animation.kill();
      
      for (var prop in this) {
        this[prop] = null;
      }
    }
   
    refresh() {
      
      var isAnimating = this.animation.isActive();      
      var segment = this.path.segments[this.index];
      var dist1 = mouse.point.getDistance(segment.point, true);
      var close = this.start.isClose(this.shape.position, 0.1);;
      var start = this.start;           
            
      if (dist1 < repelDistSq) {
                                
        this.animation.clear();
        
        var dist2 = mouse.point.getDistance(start, true);
        
        if (dist2 > snapDistSq) {
          
          this.snapBack();
          
        } else {
                    
          var direction = segment.point.subtract(mouse.point).normalize();            
          var offset = direction.multiply(repelDist - 1).add(mouse.point);
          
          segment.point.x = offset.x;
          segment.point.y = yAxisLocked ? segment.point.y : offset.y;                 
          this.shape.position = segment.point;
        }       
        
      } else {
                
        if (!isAnimating && !close) {
          this.snapBack();
        }
      }
      
      return isAnimating || !close;
    }
  
    snapBack() {         
      
      var start = this.start;
      var shape = this.shape.position;
      var point = this.path.segments[this.index].point;
        
      this.animation.clear();
      this.animation.to([point, shape], duration, { 
        x: start.x, 
        y: start.y, 
        ease: elasticEase 
      }, 0);
    }
  }

  //
  // LINE
  // ========================================================================
  class Line {
            
    controlPoints = [];
    
    group = new paper.Group();  
    path  = new paper.Path({
      parent: this.group,
      strokeColor: lineColor,
      strokeWidth: lineWidth
    });
    
    pathSymbol = lineSymbol.place([this.x, view.center.y]);

    constructor(public index, public x) {
      
      this.pathSymbol.parent  = this.group;
      this.pathSymbol.visible = showMoire;
      
      var segments = [];
      
      for (var i = 0; i <= pathSegments; i++) {
                
        var y = i / pathSegments * vh;        
        var start = new paper.Point(x, y);                        
        var canMove = (i && i !== pathSegments);        
        var controlPoint = new ControlPoint(i, this, this.path, start, canMove);
        
        this.controlPoints.push(controlPoint);                
        segments.push(start);
      }
      
      this.path.addSegments(segments);
    }

    destroy() {
           
      this.group.remove();
      
      for (var controlPoint of this.controlPoints) {
        controlPoint.destroy();
      }
      
      for (var prop in this) {
        this[prop] = null;
      }
    }

    update() {
      
      var hasChanges = false;
      
      var total = this.path.segments.length - 1;
      
      for (var i = 1; i < total; i++) {        
        if (this.controlPoints[i].refresh()) {
          hasChanges = true;
        }
      }
            
      if (hasChanges) {
        
        this.path.visible = true;
        this.pathSymbol.visible = showMoire;
        this.smoothPath();
      } else {
        
        this.path.visible = false;
        this.pathSymbol.visible = true;
      }      
    }

    smoothPath() {      
      this.path.smooth(pathSmoothing);
    }
  }
  
  //
  // RASTERIZE LINE
  // ========================================================================
  function rasterizeLine() {
    
    if (lineRaster) {
      lineRaster.remove();
    }
    
    lineShape.visible = true;    
    lineShape.segments = [[0, 0], [0, vh]];
    lineRaster = lineShape.rasterize();       
    lineSymbol = new paper.Symbol(lineRaster);
    lineShape.visible = false;    
  }
  
  //
  // RASTERIZE REPELLER
  // ========================================================================
  function rasterizeRepeller() {
    
    if (repellerRaster) {
      repellerRaster.remove();
    }
    
    repeller.visible = true;    
    repellerRaster = repeller.rasterize();    
    repellerRaster.position = mouse.point;
    repeller.visible = false;
    
    repellerRaster.blendMode = "difference";
  }
  
  //
  // UPDATE
  // ========================================================================
  function update() {
    
    for (var line of lines) {      
      line.update();
    }
    
    repellerRaster.position = mouse.point;    
  }
  
  //
  // MOUSE MOVE
  // ========================================================================
  function mouseMove(event) {    
    mouse = event;
  }
  
  createSettings();
  rasterizeRepeller();
  init();

  view.on({
    frame: update,
    mousemove: mouseMove,
    resize: debouncedInit
  });
}













              
            
!
999px

Console