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              body {
  margin: 0px;
  height: 100%;
  overflow: hidden;
  background: -moz-radial-gradient(center, ellipse cover, rgba(255,197,120,1) 0%, rgba(251,157,35,1) 100%);
  background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%,rgba(255,197,120,1)), color-stop(100%,rgba(251,157,35,1)));
  background: -webkit-radial-gradient(center, ellipse cover, rgba(255,197,120,1) 0%,rgba(251,157,35,1) 100%);
  background: -o-radial-gradient(center, ellipse cover, rgba(255,197,120,1) 0%,rgba(251,157,35,1) 100%);
  background: -ms-radial-gradient(center, ellipse cover, rgba(255,197,120,1) 0%,rgba(251,157,35,1) 100%);
  background: radial-gradient(ellipse at center, rgba(255,197,120,1) 0%,rgba(251,157,35,1) 100%);
}

canvas {
  height: 100%;
}
            
          
!
            
              // Draw Worm
// Originally forked from flash project - http://wonderfl.net/c/9os2
//
//
// Click to clear the canvas.
//
function DrawWorm(){
	
	var canvas;
	var context;

	var width;
	var height;
	
	var mouse = {x: 0, y: window.innerHeight - 20};
	
  //Expose the mouse to demo the app.
  this.mouse = mouse;
  
	var interval;
	
	var vms = [];
	
	var MAX_NUM = 100;
	var N = 80;
	
	var px = 500;
	var py = 500;
		
	this.initialize = function(){
		canvas  = document.getElementById("canvas");
		context = canvas.getContext('2d');
			
		width = window.innerWidth;
		height = window.innerHeight;
		
		canvas.width = width;
		canvas.height = height;
		
		canvas.addEventListener('mousemove', MouseMove, false);
		canvas.addEventListener('click', MouseDown, false);
		
		//Set interval - Bad! - I know!
		var interval = setInterval(Draw, 20);
		
	}
	
	var Draw = function(){
		
		var len = vms.length;
		var i;
		
		for (i = 0; i < len; i++){
			
			var o = vms[i];
			
			if (o.count < N){
				DrawWorm(o);
				o.count++;				
			
			} else {
				len--;
				vms.splice(i, 1);
				i--;
			}	
		}
		
		Check();
	}
	
	//Takes a worm (obj) param
	var DrawWorm = function (obj){

		if (Math.random() > 0.9){
			obj.tmt.rotate(-obj.r * 2);
			obj.r *= -1;
		}

		obj.vmt.prependMatrix(obj.tmt);
			
		var cc1x = -obj.w * obj.vmt.c + obj.vmt.tx;
		var cc1y = -obj.w * obj.vmt.d + obj.vmt.ty;
		
		var pp1x = (obj.c1x + cc1x) / 2;
		var pp1y = (obj.c1y + cc1y) / 2;
		
		var cc2x = obj.w * obj.vmt.c + obj.vmt.tx;
		var cc2y = obj.w * obj.vmt.d + obj.vmt.ty;
		
		var pp2x = (obj.c2x + cc2x) / 2;
		var pp2y = (obj.c2y + cc2y) / 2;
		
		context.fillStyle = '#000000';
		context.strokeStyle = '#000000';
		context.beginPath();

		context.moveTo(obj.p1x , obj.p1y);
		context.quadraticCurveTo(obj.c1x, obj.c1y, pp1x, pp1y);
		
   	context.lineTo(pp2x, pp2y);
   		
   	context.quadraticCurveTo(obj.c2x, obj.c2y, obj.p2x, obj.p2y);
   		
		context.closePath();
		context.fill();	
		
	
	    obj.c1x = cc1x;
        obj.c1y = cc1y;
        obj.p1x = pp1x;
        obj.p1y = pp1y;
        obj.c2x = cc2x;
        obj.c2y = cc2y;
        obj.p2x = pp2x;
        obj.p2y = pp2y;
	}
	
	var Check = function(){
		
		var x0 = mouse.x;
		var y0 = mouse.y;
		
		var vx = x0 - px;
		var vy = y0 - py;	
		
		var len = Math.min(Magnitude(vx, vy), 50) + 8;
		
		if (len < 10){
			return;
		}
		
		var matrix = new Matrix2D();		
	
		matrix.rotate(-(Math.atan2(vx, vy)));
		
		matrix.translate(x0, y0);
			
		createWorm(matrix, len);
		context.beginPath(); 
		context.strokeStyle = '#000000';
   		context.moveTo(px, py);
   		context.lineTo(x0, y0);
   		context.stroke();
   		context.closePath();
   		
   		px = x0;
   		py = y0;
   	
		//More logic here for afterwards?
	}
	
	var createWorm = function(mtx, len){
				
		var angle = Math.random() * (Math.PI/6 - Math.PI/64) + Math.PI/64;
		
		if(Math.random() > 0.5){
			angle *= -1;		
		}
		

		var tmt = new Matrix2D();	
		tmt.scale(0.95, 0.95);
		//tmt.rotate(angle);			
		tmt.translate(12, 0);
		
		var w = 0.5;

		 var obj = new Worm();
 		
		 obj.c1x = (-w * mtx.c + mtx.tx);
		 obj.p1x = (-w * mtx.c + mtx.tx);
		 	
		 obj.c1y = (-w * mtx.d + mtx.ty);
		 obj.p1y = (-w * mtx.d + mtx.ty);	
		 	
		 obj.c2x = (w * mtx.c + mtx.tx);
		 obj.p2x = (w * mtx.c + mtx.tx);	
		 	 
		 obj.c2y = (w * mtx.d + mtx.ty);
		 obj.p2y = (w * mtx.d + mtx.ty); 
	 	 
		 obj.vmt = mtx;
		 obj.tmt = tmt;
 		
		 obj.r = angle;
		 obj.w = len/20;
		 obj.count = 0;
 		
		 vms.push(obj);
		
		if (vms.length > MAX_NUM){
			vms.shift();
		}
	}
	
	//Not sure why they do this kinda thing in flash.
	var Worm = function(){	
		this.c1x = null;
		this.c1y = null;
		this.c2x = null;
		this.c2y = null;
		this.p1x = null;
		this.p1y = null;
		this.p2x = null;
		this.p2y = null;
		
		this.w = null;
		this.r = null;
		
		this.count = null;
		this.vmt = null;
		this.tmt = null;
		
	}
	
	//Clear the screen, 
	var MouseDown = function(e) {
		e.preventDefault();
    canvas.width = canvas.width;
		vms = [];
	}
	
	var MouseMove = function(e) {
        mouse.x = e.layerX - canvas.offsetLeft;
        mouse.y = e.layerY - canvas.offsetTop;
	}
	
	//Returns Magnitude
	var Magnitude = function(x, y){
		return Math.sqrt((x * x) + (y * y));
	}
			
}

function demoApp() {
  app.mouse.x += 20;
  if (app.mouse.x >= window.innerWidth) {
   window.clearInterval( interval ); 
  }
}

// Start the demo.
var app, interval;
setTimeout( function() {
  
  app = new DrawWorm();
  app.initialize();
  interval = setInterval( demoApp, 20 );
}, 10 );

            
          
!
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