User:Lbattich/canvas experiments: Difference between revisions

Revision as of 10:17, 30 September 2014

The idea is to create a webpage that would generate abstract images, inspired in the proun/suprematist works of El Lissitzky. such as this one:

The tests are pretty far from that goal yet, but hey, the goal is not quite the important here perhaps...

test 1

Proun experiment 1

<!DOCTYPE html>

<!--
_                                
| |_   _  ___ __ _ ___            
| | | | |/ __/ _` / __|           
| | |_| | (_| (_| \__ \           
|_|\__,_|\___\__,_|___/           
                                  
 _           _   _   _      _     
| |__   __ _| |_| |_(_) ___| |__  
| '_ \ / _` | __| __| |/ __| '_ \ 
| |_) | (_| | |_| |_| | (__| | | |
|_.__/ \__,_|\__|\__|_|\___|_| |_|


PROUN GENERATOR - PROTOTYPE
by LUCAS BATTICH, 2014
  
-->

<html>
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="content-type">
    <meta name="author" content="Lucas Battich">
    <meta name="description" content="PROUN GENERATOR - PROTOTYPE by LUCAS BATTICH, 2014">
    <title>PROUN GENERATOR - PROTOTYPE</title>
  </head>
  <body style="text-align:center; background-color:black">
  <canvas id="proun" onclick="start()">
      Aw noes! Your browser does not support the HTML5 canvas tag - try using
      Chrome or Safari. Tech up! </canvas>
      <p id="d"></p>
 
    <script language="JavaScript">
var x=document.getElementById("proun"); //declare global var x for canvas

var y1,y2,y3,x1,m1;
//var i=0;
var ctx=x.getContext("2d");
window.onload = function(){start();setInterval(function(){choose()},1000)};
//window.onload = function(){start()};

function start()
{
x.width=window.innerWidth-30;
x.height=window.innerHeight-30;
ctx.fillStyle=colourme()+"1)"; //first colour
ctx.fillRect(0,0,x.width,x.height);
ctx.fill();
choose();
}

//choose btw different shapes
function choose() {

        var numb=Math.floor(Math.random()*4);
        if (numb==0){circle()}
        else if (numb==1){circle()}
        else if (numb==2){four()}
        else if (numb==3){four()}
        }

//functions:

// circle:
function circle()
{
var xc,yc,radio;
yc=Math.floor((x.height+1)*Math.random());
xc=Math.floor((x.width+1)*Math.random());
radio=Math.floor((200)*Math.random());
ctx.beginPath();
ctx.arc(xc,yc,radio,0,2*Math.PI);
ctx.stroke();
}


//create a 4 sided shape, filled with gradient
function four() 
{
var x4,y4;
y4=Math.floor((x.height+1)*Math.random());
x4=Math.floor((x.width+1)*Math.random());
ctx.beginPath();
ctx.moveTo(x4,y4);
y4=Math.floor((x.height+1)*Math.random());
x4=Math.floor((x.width+1)*Math.random());
ctx.lineTo(x4,y4);
y4=Math.floor((x.height+1)*Math.random());
x4=Math.floor((x.width+1)*Math.random());
ctx.lineTo(x4,y4);
y4=Math.floor((x.height+1)*Math.random());
x4=Math.floor((x.width+1)*Math.random());
ctx.lineTo(x4,y4);
ctx.closePath();
var grd=ctx.createLinearGradient(x.width/2,y4,x4,x.height);
grd.addColorStop(0,colourme()+"1)");
grd.addColorStop(1,colourme()+"1)");
ctx.fillStyle=grd;
ctx.fill();
}

function colourme()
{
var a = Math.floor(256*Math.random());
var b = Math.floor(256*Math.random());
var c = Math.floor(256*Math.random());
var colour = "rgba("+a+","+b+","+c+",";
return colour;
}
</script>
  </body>
</html>