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

              
                <div id="canvas-container-div">
  <canvas id="canvas"></canvas>
</div>

<div id="restart-button-div">
  <img id="restart-icon" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/409445/restart.svg">
</div>

<script src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/409445/jquery-3.4.1.min.js"></script>
<script src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/409445/verletExpress.js"></script>
              
            
!

CSS

              
                body {
  margin: 0;
}

#canvas-container-div {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  width: 100%;
  height: 100%;
}

#canvas {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  width: 100%;
  height: 100%;
  background: #000000;
}

#restart-button-div {
  position: absolute;
  bottom: 25px;
  right: 25px;
  width: 50px;
  height: 50Px;
  background: white;
  opacity: 0.7;
  cursor: pointer;
  border-radius: 100%;
}

#restart-icon {
  position: absolute;
  top: 50%;
  left: 47%;
  transform: translate( -50%, -50% );
  width: 35px;
  height: 45px;
}

              
            
!

JS

              
                

/////--- Initialization ---/////

$( window ).on( "load", ()=> {
  

///Elements
var canvas = document.getElementById("canvas");
var canvasWidth = canvas.clientWidth;
var canvasHeight = canvas.clientHeight;
var restartButton = document.getElementById("restart-button-div")

///VerletExpressJS
VX.initialize( "2d", "canvas", "canvas", canvasWidth, canvasHeight );
VX.xRange = { min: null, max: null };
VX.yRange = { min: -VX.interfaceHeight*0.2, max: null };
VX.breeze = 1;

///Settings
var beginWithBurst = true;
var confettis = []; var confettiCount = 0;
var confettiVolumeInit = 150;
var confettiVolumeMax = confettiVolumeInit+25;
var confettiWidthMin = VX.interfaceHeight*0.01;
var confettiWidthMax = VX.interfaceHeight*0.015;
var confettiWidth = function() { return VX.rfb( confettiWidthMin, confettiWidthMax );  };
var confettiInitX = function() { return VX.rfb( 0, VX.interfaceWidth ) }; // initial confetti top left corner x position
var confettiInitY = function() { return VX.rfb( -confettiWidthMax, VX.interfaceHeight ) }; // initial confetti top left corner y position
var confettiVelocityBase = confettiWidthMax*0.5;
var initialBurstIntensity = confettiWidthMax*5;
var refreshed = false; 

///colors
var backgroundColor = "#111111";
var confettiAlpha = 1;  // confetti alpha
var janeStreetPalette = [ `rgba( 32, 133, 239, ${confettiAlpha} )`,
                          `rgba( 0, 194, 143, ${confettiAlpha} )`,
                          `rgba( 129, 208, 4, ${confettiAlpha} )`,
                          `rgba( 86, 171, 15, ${confettiAlpha} )` ];
var pastelPartyPalette = [ `rgba( 168, 100, 253, ${confettiAlpha} )`,
                           `rgba( 41, 205, 255, ${confettiAlpha} )`,
                           `rgba( 120, 255, 68, ${confettiAlpha} )`,
                           `rgba( 253, 255, 106, ${confettiAlpha} )`,
                           `rgba( 255, 113, 141, ${confettiAlpha} )` ];
var tropicalSunsetPalette = [ `rgba( 254,218,132, ${confettiAlpha} )`,
                              `rgba( 255,155,131, ${confettiAlpha} )`,
                              `rgba( 151,99,147, ${confettiAlpha} )`,
                              `rgba( 104,84,137, ${confettiAlpha} )`,
                              `rgba( 67,69,127, ${confettiAlpha} )` ];
var goldPalette = [ `rgba( 166,124,0, ${confettiAlpha} )`,
                    `rgba( 191,155,48, ${confettiAlpha} )`,
                    `rgba( 255,191,0, ${confettiAlpha} )`,
                    `rgba( 255,207,64, ${confettiAlpha} )`,
                    `rgba( 255,220,115, ${confettiAlpha} )` ];
var randomPalette = generateRandomPalette(5);
document.getElementById("canvas").style.background = backgroundColor;
var colors = randomPalette;

///Interaction
var mouseCoords = { cx: null, cy: null, px: null, py: null };
var mouseZoneRadius = confettiWidthMax*5;
var mouseStrength = 0.1;
var popperBurstVolumeMax = 50;
var popperBurstIntensity = confettiWidthMax*2;
var popperBurstZoneRadius = confettiWidthMax*10;




/////--- Functions ---/////


function generateRandomPalette( colorCount ) {
  var palette = [];
  for ( var i=0; i<colorCount; i++ ) { 
    palette.push( `rgba( ${VX.rib(0,255)}, ${VX.rib(0,255)}, ${VX.rib(0,255)}, ${confettiAlpha} )` ); 
  }
  return palette
}
  

function Confetti( initX, initY ) {
  confettiCount++;
  this.id = confettiCount;
  this.width = confettiWidth();
  this.color = colors[ VX.rib( 0, colors.length-1 ) ];
  this.pt1 = VX.addPoint( { x: initX, y: initY } );
  this.pt1.px += VX.rfb( -confettiVelocityBase/2, confettiVelocityBase/2 );  // adds initialx velocity
  this.pt1.py += VX.rfb( -confettiVelocityBase, 0 );  // adds initial y velocity
  this.pt2 = VX.addPoint( { x: initX+this.width, y: initY } );
  this.pt3 = VX.addPoint( { x: initX+this.width, y: initY+this.width } );
  this.pt4 = VX.addPoint( { x: initX, y: initY+this.width } );
  this.sp1 = VX.addSpan( this.pt1, this.pt2 );
  this.sp2 = VX.addSpan( this.pt2, this.pt3 );
  this.sp3 = VX.addSpan( this.pt3, this.pt4 );
  this.sp4 = VX.addSpan( this.pt4, this.pt1 );
  this.sp5 = VX.addSpan( this.pt1, this.pt3 );
  this.sk = VX.addSkin( [ this.pt1, this.pt2, this.pt3, this.pt4 ], { fillColor: this.color, outlineColor: "rgba(0,0,0,0)", outlineThickness: 0 } );
}

function runInitialBurst() {  
  for ( var i=0; i<confettiVolumeInit; i++ ) {
    var initAngle = VX.rfb(0,Math.PI*2);
    var initDistance = VX.rfb( 0, VX.interfaceWidth*0.1 );
    var initConfettiX = VX.interfaceWidth*0.5 + Math.cos( initAngle - Math.PI/2 ) * initDistance;
    var initConfettiY = VX.interfaceHeight*0.6 + Math.sin( initAngle - Math.PI/2 ) * initDistance;
    confettis.push( new Confetti( initConfettiX, initConfettiY ) );
    var velocity = VX.rfb( -initialBurstIntensity, initialBurstIntensity );
    var velocityAngle = VX.rfb( 0, Math.PI*2 );
    confettis[confettis.length-1].pt1.px = initConfettiX + Math.cos( velocityAngle-Math.PI/2 ) * velocity;
    confettis[confettis.length-1].pt1.py = initConfettiY + Math.sin( velocityAngle-Math.PI/2 ) * velocity + VX.interfaceWidth*0.01;
  }
}

function runInitialFall() {
  for ( var i=0; i<confettiVolumeInit; i++ ) {
    confettis.push( new Confetti( confettiInitX(), confettiInitY() ) );
  }
  confettiInitY = function() { return -confettiWidthMax*3; };
}

function beginConfetti() {
  beginWithBurst ? runInitialBurst() : runInitialFall();
  confettiInitY = ()=> { return -confettiWidthMax*3; };
  setTimeout( ()=> { refreshed = false }, 1 );
}

function removeConfettiById( id ) {
  for ( var i=0; i<confettis.length; i++ ){ 
    var c = confettis[i]; 
    if ( c.id == id ) { 
      VX.removePoint( c.pt1.id ); VX.removePoint( c.pt2.id ); VX.removePoint( c.pt3.id ); VX.removePoint( c.pt4.id );
      VX.removeSpan( c.sp1.id ); VX.removeSpan( c.sp2.id ); VX.removeSpan( c.sp3.id ); VX.removeSpan( c.sp4.id ); VX.removeSpan( c.sp5.id ); 
      VX.removeSkin( c.sk.id );
      confettis.splice(i,1); 
    }
  }
}

function removeConfettiByIndex( index ) {
  var c = confettis[index];
  VX.removePoint( c.pt1.id ); VX.removePoint( c.pt2.id ); VX.removePoint( c.pt3.id ); VX.removePoint( c.pt4.id );
  VX.removeSpan( c.sp1.id ); VX.removeSpan( c.sp2.id ); VX.removeSpan( c.sp3.id ); VX.removeSpan( c.sp4.id );   
  VX.removeSpan( c.sp5.id ); 
  VX.removeSkin( c.sk.id );
  confettis.splice( index, 1 );
}

function replaceFallenConfettis() {
  for ( var i=0; i<confettis.length; i++ ) {
    var c = confettis[i];  
    if ( c.pt1.cy > VX.interfaceHeight*1.1) {
      removeConfettiById( c.id );
      if ( confettis.length < confettiVolumeInit ) {
        confettis.push( new Confetti( confettiInitX(), confettiInitY() ) );
      }
    }
  }
}

function updateMouseCurrentCoords( event ) { 
  mouseCoords.cx = event.clientX; 
  mouseCoords.cy = event.clientY;
}

function updateMousePreviousCoords() {
  mouseCoords.px = mouseCoords.cx;
  mouseCoords.py = mouseCoords.cy;  
}

function moveConfettisOnMouseOver() {
  for ( var i=0; i<confettis.length; i++ ) {
    var c = confettis[i];
    var xDiff = Math.abs( mouseCoords.cx - c.pt1.cx );
    var yDiff = Math.abs( mouseCoords.cy - c.pt1.cy );
    var mouseVelocityX = mouseCoords.cx - mouseCoords.px;
    var mouseVelocityY = mouseCoords.cy - mouseCoords.py;
    if ( xDiff <= mouseZoneRadius && yDiff <= mouseZoneRadius && mouseCoords.px != null && mouseCoords.py != null ) {
      c.pt1.px -= mouseVelocityX*mouseStrength;
      c.pt1.py -= mouseVelocityY*mouseStrength;
    }
  }
}

function popperBurst( event ) {  
  //blast nearby confettis
  for ( var i=0; i<confettis.length; i++ ) {
    var c = confettis[i];
    var xDiff = c.pt1.cx - mouseCoords.cx;
    var yDiff = c.pt1.cy - mouseCoords.cy;
    var dist = Math.sqrt( Math.abs(xDiff*xDiff) + Math.abs(yDiff*yDiff) );
    var intensity = (popperBurstZoneRadius-dist)*popperBurstIntensity*0.0005;
    if ( dist <= popperBurstZoneRadius ) {
      c.pt1.px = c.pt1.cx - xDiff*intensity;
      c.pt1.py = c.pt1.cy - yDiff*intensity;
    }
  }
  //new confettis burst
  var volume = confettis.length < confettiVolumeMax-popperBurstVolumeMax ? popperBurstVolumeMax : confettiVolumeMax-confettis.length; 
  for ( var i=0; i<volume; i++ ) {
    confettis.push( new Confetti( mouseCoords.cx, mouseCoords.cy ) );
    confettis[confettis.length-1].pt1.px = mouseCoords.cx;
    confettis[confettis.length-1].pt1.py = mouseCoords.cy;
    var velocity = VX.rfb( -popperBurstIntensity, popperBurstIntensity );
    var angle = VX.rfb( 0, Math.PI*2 );
    confettis[confettis.length-1].pt1.px = mouseCoords.cx + Math.cos( angle-Math.PI/2 ) * velocity;
    confettis[confettis.length-1].pt1.py = mouseCoords.cy + Math.sin( angle-Math.PI/2 ) * velocity;
  }
}
  
function refresh() {
  VX.points = [];
  VX.spans = [];
  VX.skins = [];
  confettis = [];
  colors = colors = randomPalette ? generateRandomPalette(5) : colors;
  refreshed = true;
  beginConfetti();
}



/////--- Adapted Functions ---/////

var mv = 5;  // maximum velocity

VX.updatePoints = function() {
  for ( var i=0; i<VX.points.length; i++ ) {
    var p = VX.points[i];
    var xv = ( p.cx - p.px ) * VX.friction;
    var yv = ( p.cy - p.py ) * VX.friction;
    p.px = p.cx;
    p.py = p.cy;
    p.cx += xv; 
    p.cy += yv; 
    p.cy += VX.gravity * p.mass;
    if ( VX.worldTime % VX.rib( 100, 200 ) == 0 ) { p.cx += VX.rfb( -VX.breeze, VX.breeze ); }  
  }
}
    
VX.runOnFrameRefresh = function() { 
  replaceFallenConfettis();
  moveConfettisOnMouseOver();
  updateMousePreviousCoords();
}



/////--- Scaling ---/////
  
function scaleToWindow() {
  VX.interfaceWidth = VX.canvas.width = window.innerWidth;
  VX.interfaceHeight = VX.canvas.height = window.innerHeight;
}

scaleToWindow();


    
/////--- Events ---/////

window.addEventListener( "resize", scaleToWindow );
restartButton.addEventListener( "mousedown", refresh );
document.addEventListener( "mousedown", ()=> { if ( !refreshed ) popperBurst() });
document.addEventListener( "mousemove", updateMouseCurrentCoords );


/////--- Run ---/////

beginConfetti();



});







              
            
!
999px

Console