window.addEventListener("load", onloadHandler, false);

function onloadHandler(){
    var CANVASSIZE=64;
    var OFFSET = 10;
    var OBJMOVEY = -25;
    var OBJSCALE = 0.25;
    var canvas=document.createElement("canvas");
    if(!canvas){
        return
    }
    canvas.width=CANVASSIZE;
    canvas.height=CANVASSIZE;
    canvas.title="3D HTML5 Logo";
    canvas.style.position="absolute";
    canvas.style.zIndex=100;
    canvas.style.cursor="";
    document.body.appendChild(canvas);
    canvas.style.left=canvas.style.top=OFFSET+"px";
    var destinationY=positionY=OFFSET;
    window.addEventListener("scroll",function onscroll(){
        destinationY=window.pageYOffset+OFFSET
    }
    ,false);
    var k3dmain = new K3D.Controller(canvas, true);

   // generate 3D objects for the HTML5 Logo 5 faces + the HTML text above it  
   var obj1 = new K3D.K3DObject();
   with (obj1)
   {
      drawmode = "solid";
      shademode = "lightsource";
      sortmode = "unsorted";
      addphi = -0.5;
      abouty = OBJMOVEY;
      scale = OBJSCALE;
      perslevel = 1000;
      init(
         [{x:-80,y:180,z:0},{x:0,y:180,z:-80},{x:0,y:0,z:-80},{x:-80,y:20,z:0},{x:-50,y:150,z:-30},{x:0,y:150,z:-80},{x:0,y:130,z:-80},{x:-30,y:130,z:-50},{x:-28,y:110,z:-52},{x:0,y:110,z:-80},{x:0,y:90,z:-80},{x:-45,y:90,z:-35},{x:-44,y:80,z:-36},{x:-25,y:80,z:-55},{x:-22,y:66,z:-58},{x:0,y:60,z:-80},{x:0,y:40,z:-80},{x:-40,y:50,z:-40}],
         [],
         [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[235,235,235],vertices:[4,5,6,7,8,9,10,11,4]},{color:[235,235,235],vertices:[12,13,14,15,16,17,12]}]
      );
   }
   k3dmain.addK3DObject(obj1);
   
   var obj2 = new K3D.K3DObject();
   with (obj2)
   {
      drawmode = "solid";
      shademode = "lightsource";
      sortmode = "unsorted";
      addphi = -0.5;
      abouty = OBJMOVEY;
      scale = OBJSCALE;
      perslevel = 1000;
      init(
         [{x:0,y:180,z:-80},{x:80,y:180,z:0},{x:80,y:20,z:0},{x:0,y:0,z:-80},{x:0,y:165,z:-80},{x:68,y:165,z:-12},{x:55,y:35,z:-25},{x:0,y:20,z:-80},{x:0,y:150,z:-80},{x:50,y:150,z:-30},{x:47,y:130,z:-33},{x:0,y:130,z:-80},{x:0,y:110,z:-80},{x:45,y:110,z:-35},{x:40,y:50,z:-40},{x:0,y:40,z:-80},{x:0,y:60,z:-80},{x:20,y:66,z:-60},{x:23,y:90,z:-57},{x:0,y:90,z:-80}],
         [],
         [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[240,101,41],vertices:[4,5,6,7,4]},{color:[235,235,235],vertices:[8,9,10,11,8]},{color:[235,235,235],vertices:[12,13,14,15,16,17,18,19,12]}]
      );
   }
   k3dmain.addK3DObject(obj2);
   
   var obj3 = new K3D.K3DObject();
   with (obj3)
   {
      drawmode = "solid";
      shademode = "lightsource";
      sortmode = "unsorted";
      addphi = -0.5;
      abouty = OBJMOVEY;
      scale = OBJSCALE;
      perslevel = 1000;
      init(
         [{x:80,y:180,z:0},{x:0,y:180,z:80},{x:0,y:0,z:80},{x:80,y:20,z:0},{x:50,y:150,z:30},{x:0,y:150,z:80},{x:0,y:130,z:80},{x:30,y:130,z:50},{x:28,y:110,z:52},{x:0,y:110,z:80},{x:0,y:90,z:80},{x:45,y:90,z:35},{x:44,y:80,z:36},{x:25,y:80,z:55},{x:22,y:66,z:58},{x:0,y:60,z:80},{x:0,y:40,z:80},{x:40,y:50,z:40}],
         [],
         [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[235,235,235],vertices:[4,5,6,7,8,9,10,11,4]},{color:[235,235,235],vertices:[12,13,14,15,16,17,12]}]
      );
   }
   k3dmain.addK3DObject(obj3);
   
   var obj4 = new K3D.K3DObject();
   with (obj4)
   {
      drawmode = "solid";
      shademode = "lightsource";
      sortmode = "unsorted";
      addphi = -0.5;
      abouty = OBJMOVEY;
      scale = OBJSCALE;
      perslevel = 1000;
      init(
         [{x:0,y:180,z:80},{x:-80,y:180,z:0},{x:-80,y:20,z:0},{x:0,y:0,z:80},{x:0,y:165,z:80},{x:-68,y:165,z:12},{x:-55,y:35,z:25},{x:0,y:20,z:80},{x:0,y:150,z:80},{x:-50,y:150,z:30},{x:-47,y:130,z:33},{x:0,y:130,z:80},{x:0,y:110,z:80},{x:-45,y:110,z:35},{x:-40,y:50,z:40},{x:0,y:40,z:80},{x:0,y:60,z:80},{x:-20,y:66,z:60},{x:-23,y:90,z:57},{x:0,y:90,z:80}],
         [],
         [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[240,101,41],vertices:[4,5,6,7,4]},{color:[235,235,235],vertices:[8,9,10,11,8]},{color:[235,235,235],vertices:[12,13,14,15,16,17,18,19,12]}]
      );
   }
   k3dmain.addK3DObject(obj4);
   
   var objBase = new K3D.K3DObject();
   with (objBase)
   {
      drawmode = "solid";
      shademode = "lightsource";
      sortmode = "unsorted";
      addphi = -0.5;
      abouty = OBJMOVEY;
      scale = OBJSCALE;
      perslevel = 1000;
      init(
         [{x:0,y:0,z:-80},{x:-80,y:20,z:0},{x:0,y:0,z:80},{x:80,y:20,z:0}],
         [],
         [{color:[227,76,38],vertices:[0,2,1,0]},{color:[227,76,38],vertices:[0,3,2,0]}]
      );
   }
   k3dmain.addK3DObject(objBase);
   
   var objHtml = new K3D.K3DObject();
   with (objHtml)
   {
      drawmode = "solid";
      shademode = "lightsource";
      //sortmode = "unsorted";
      color = [64,64,64];
      doublesided = true;
      addphi = -0.5;
      abouty = 22;
      scale = 0.19;
      perslevel = 1000;
      init(
         [{x:-80,y:40,z:0},{x:-70,y:40,z:0},{x:-70,y:30,z:0},{x:-60,y:30,z:0},{x:-60,y:40,z:0},{x:-50,y:40,z:0},{x:-50,y:10,z:0},{x:-60,y:10,z:0},{x:-60,y:20,z:0},{x:-70,y:20,z:0},{x:-70,y:10,z:0},{x:-80,y:10,z:0},{x:-40,y:40,z:0},{x:-10,y:40,z:0},{x:-10,y:30,z:0},{x:-20,y:30,z:0},{x:-20,y:10,z:0},{x:-30,y:10,z:0},{x:-30,y:30,z:0},{x:-40,y:30,z:0},{x:0,y:40,z:0},{x:10,y:40,z:0},{x:20,y:30,z:0},{x:30,y:40,z:0},{x:40,y:40,z:0},{x:40,y:10,z:0},{x:30,y:10,z:0},{x:30,y:30,z:0},{x:20,y:20,z:0},{x:10,y:30,z:0},{x:10,y:10,z:0},{x:0,y:10,z:0},{x:50,y:40,z:0},{x:60,y:40,z:0},{x:60,y:20,z:0},{x:80,y:20,z:0},{x:80,y:10,z:0},{x:50,y:10,z:0}],
         [],
         [{vertices:[0,1,2,3,4,5,6,7,8,9,10,11,0]},{vertices:[12,13,14,15,16,17,18,19,12]},{vertices:[20,21,22,23,24,25,26,27,28,29,30,31,20]},{vertices:[32,33,34,35,36,37,32]}]
      );
   }
   k3dmain.addK3DObject(objHtml);
   
   // add render loop callback
   var ctx = canvas.getContext('2d');
   var rotationOffset = 0;
   var len = (canvas.height > canvas.width ? canvas.height : canvas.width) * 0.7;
   k3dmain.clearBackground = false;
   k3dmain.callback = function()
   {
       if (positionY != destinationY) {
           positionY += (destinationY - positionY) / OFFSET;
           canvas.style.top = Math.floor(positionY) + "px"
       }

      // manually clear bg - as we want to render some extra goodies
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      
      rotationOffset += 0.005;
   };
   
   // start demo loop
   k3dmain.paused = true;
   setInterval(function(){k3dmain.tick()}, 1000/60);
}