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. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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

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

              
                
              
            
!

CSS

              
                body{
  margin:0;
}
              
            
!

JS

              
                var lBlobs=[];
var numLBlobs=10;
var disturbers=[];
var numDisturbers=10;
var disturbLen=100;
var disturbA=0
var ox=0, oy=0;
var wp;
var ts=200;


function setup() {
  createCanvas(windowWidth, windowHeight);
  disturbLen=height/6;
  var offX=width/2-8*height/25;
  var offY=height/2-8*height/25;
  for(var j=0; j<16; j++){
    for(var i=0; i<16; i++){
      lBlobs.push(new LiquidBlob(offX+j*height/25, offY+i*height/25, height/25, 0.1, 0.95));
    }
  }
  colorMode(HSB);
}

function updateDisturbers(){
  for(var i=0; i<numDisturbers; i++){
    disturbers[i]={
      x:mouseX+cos(disturbA+TWO_PI/numDisturbers*i)*disturbLen/2,
      y:mouseY+sin(disturbA+TWO_PI/numDisturbers*i)*disturbLen/2
    };
  }
}

function draw() {
  background(20);
  lBlobs.forEach(function(lBlob){
    lBlob.show();
  });
  disturbA+=0.01;
  updateDisturbers();
  textAlign(CENTER);
  textSize(height/16);
  fill(30,80,100,0.4);
  noStroke();
  text("move mouse over the cells",width/2, height*0.85);
}

function mouseMoved(){
  ox=width/2+(mouseX-width/2)*2;
  oy=mouseY;
}

function LiquidBlob(x,y,r,s,d){
  var cells=[];
  var numCells=20;
  var verts=[];
  
 for(var i=0; i<numCells; i++){
    // cells[i]=new Cell(i*width/numCells,y+(y-r),s,d);
    cells[i]=new Cell(i, x+cos(TWO_PI*i/numCells)*r, y+sin(TWO_PI*i/numCells)*r, s, d);
    if(i>0){
      cells[i].prevCell=cells[i-1];
      cells[i].setPrevDist();
      cells[i-1].nextCell=cells[i];
      cells[i-1].setNextDist();
    }
  }
  cells[numCells-1].nextCell=cells[0];
  cells[numCells-1].setNextDist();
  cells[0].prevCell=cells[numCells-1];
  cells[0].setPrevDist();
  
  this.show=function(){
    verts=[];
    var velAgg=0;
    cells.forEach(function(cell){
      // cell.show();
      // cell.repel();
      cell.repelMany();
      cell.neighbourTension();
      cell.run();
      verts.push(cell.getVertex());
      velAgg+=cell.getVertex().v;
    });
    var velMean=velAgg/cells.length;
    stroke(100*velMean,100,100,0.5-0.25*velMean);
    strokeWeight(0.5+velMean*10);
    noFill();
    beginShape();
    verts.forEach(function(v){
      vertex(v.x, v.y);
    });
    endShape(CLOSE);
  };
}

function Cell(id,x,y, s, d){
  var stiffness=s;
  var decay=d;
  var maxDist=25;
  var repelStiffness=0.01;
  var origin=createVector(x,y);
  var pos=createVector(0,0);
  var vel=createVector(0,0);
  var velMax=maxDist*stiffness;
  var absPos=origin.copy();
  var repel=createVector(0,0);
  var repelMag=maxDist;
  var acc=createVector(0,0);
  var zero=createVector(0,0);
  
  
  this.prevCell=null;
  this.nextCell=null;
  var prevDist=0;
  var nextDist=0;
  var neighbourStiffness=s/10;
  var prevTension=createVector(0,0);
  var nextTension=createVector(0,0);
  
  this.setNextDist=function(){
    nextDist=p5.Vector.sub(absPos, this.nextCell.getPos()).mag();
  };
  
  this.setPrevDist=function(){
    prevDist=p5.Vector.sub(absPos, this.prevCell.getPos()).mag();
  };
  
  this.getPos=function(){
    return absPos;
  }
  
  this.show=function(){
    noStroke();
    push();
    translate(origin.x, origin.y);
    translate(pos.x, pos.y);
    fill(0,100,100,1);
    ellipse(0,0,5);
    pop();
  };
  
  this.repel=function(){
    repel=p5.Vector.sub(absPos,createVector(mouseX, mouseY));
    repelMag=repel.mag();
    if(repelMag<maxDist){
      repel.mult((maxDist-repelMag)*repelStiffness);
    } else {
      repelMag=maxDist;
      repel.mult(0);
    }
  };
  
  this.repelMany=function(){
    repel.mult(0);
    disturbers.forEach(function(d){
      var repelThis=p5.Vector.sub(absPos,createVector(d.x, d.y));
      repelMag=repelThis.mag();
      if(repelMag<maxDist){
        repelThis.mult((maxDist-repelMag)*repelStiffness);
      } else {
        repelMag=maxDist;
        repelThis.mult(0);
      }
      repel.add(repelThis);
    });
  }
  
  this.neighbourTension=function(){
    var prevTarget=p5.Vector.sub(absPos, this.prevCell.getPos());
    prevTarget.setMag(prevDist).add(this.prevCell.getPos());
    prevTension=p5.Vector.sub(prevTarget, absPos);
    var prevDistNow=prevTension.mag();
    // if(id===0) console.log(id+" "+prevDistNow);
    if(prevDistNow>0){
      prevTension.mult(neighbourStiffness);
    } else {
      prevDistNow=0;
      prevTension.mult(0);
    }
    
    var nextTarget=p5.Vector.sub(absPos, this.nextCell.getPos());
    nextTarget.setMag(nextDist).add(this.nextCell.getPos());
    nextTension=p5.Vector.sub(nextTarget, absPos);
    var nextDistNow=nextTension.mag();
    // if(id===0) console.log(id+" "+prevDistNow);
    if(nextDistNow>0){
      nextTension.mult(neighbourStiffness);
    } else {
      nextDistNow=0;
      nextTension.mult(0);
    }
  }
  
  function runPrevTension(){
    
  }
  
 
  this.run=function(){
    acc.add(p5.Vector.sub(zero,pos).mult(stiffness));
    acc.add(repel);
    acc.add(nextTension);
    acc.add(prevTension);
    vel.add(acc);
    vel.mult(decay);
    pos.add(vel);
    acc.mult(0);
    absPos=p5.Vector.add(origin, pos);
  };
  
  this.getVertex=function(){
    return {
      x:absPos.x,
      y:absPos.y,
      v:vel.mag()/velMax
    };
  };
}

              
            
!
999px

Console