A Pen By
Matei Copot
Pro

` ````
<canvas id=c></canvas>
```

` ````
canvas {
position: absolute;
top: 0;
left: 0;
}
```

` ````
var w = c.width = window.innerWidth,
h = c.height = window.innerHeight,
ctx = c.getContext( '2d' ),
opts = {
dist: 15, //units
sideLen: 25, //points
waveIncrement: .02,
distanceWaveFactor: 50,
colorIncrement: 1,
colorMultiplier: 100,
baseY: 60,
addedY: 50,
depth: 400,
maxDepth: 700,
rotYVel: .01,
focalLength: 250,
vanishPoint: {
x: w / 2,
y: h / 2
}
},
calc = {
difX: Math.sqrt( 3 ) * opts.dist, // height of a equilateral triangle
difZ: opts.dist * 3 / 2, // side of a triangle ( because it goes down to a vertex ) then half a side of the triangle in the hex below: s + s/2 = s*3/2
translate: {
x: -Math.sqrt( 3 ) * opts.dist * opts.sideLen / 2,
z: -opts.dist * 3 / 2 * opts.sideLen / 2,
y: opts.baseY
},
rotY: {}
},
rotY = 0,
points = [],
tick = 0,
waveTick = 0,
colorTick = 0;
function setup(){
// put hexagon points in the array
for( var i = 0; i < opts.sideLen; ++i ){
var shiftZ = ( ( i + 1 ) % 2 ) / 2;
for( var j = 0; j < opts.sideLen; ++j ){
var shiftX = ( j % 2 ) / 2;
points.push( new Point(
( j + shiftZ ) * calc.difX + calc.translate.x,
calc.translate.y,
( i + shiftX ) * calc.difZ + calc.translate.z ) );
// connect
if( points[ i * opts.sideLen + j - 1 ] && j > 0 )
points[ points.length - 1 ].link( points[ i * opts.sideLen + j - 1 ] );
if( points[ ( i - 1 ) * opts.sideLen + j ] )
points[ points.length - 1 ].link( points[ ( i - 1 ) * opts.sideLen + j ] );
}
}
}
function Point( x, y, z ){
this.x = x;
this.y = y;
this.z = z;
this.screen = {
x: 0,
y: 0
};
this.distFromCenter = Math.sqrt( x*x + z*z ) / opts.distanceWaveFactor;
this.links = [];
}
Point.prototype.link = function( point ){
this.links.push( point );
}
Point.prototype.step = function(){
var wave = -Math.sin( waveTick + this.distFromCenter ),
x = this.x,
y = this.y + opts.addedY * wave,
z = this.z;
// apply rotation around Y axis
var x1 = x;
x = x * calc.rotY.cos - z * calc.rotY.sin;
z = z * calc.rotY.cos + x1 * calc.rotY.sin;
// push back
z += opts.depth;
if( z < 0 )
return false;
// calculate screen position
var scale = opts.focalLength / z;
this.screen.x = opts.vanishPoint.x + scale * x;
this.screen.y = opts.vanishPoint.y + scale * y;
ctx.strokeStyle = 'hsla( hue, 80%, 50%, alp )'
.replace( 'hue', colorTick + wave * opts.colorMultiplier )
.replace( 'alp', 1 / this.distFromCenter );
ctx.beginPath();
for( var i = 0; i < this.links.length; ++i ){
ctx.moveTo( this.screen.x, this.screen.y );
ctx.lineTo( this.links[ i ].screen.x, this.links[ i ].screen.y );
}
ctx.stroke();
}
function anim(){
window.requestAnimationFrame( anim );
++tick;
colorTick += opts.colorIncrement;
waveTick += opts.waveIncrement;
ctx.fillStyle = 'black';
ctx.fillRect( 0, 0, w, h );
rotY += opts.rotYVel;
calc.rotY.cos = Math.cos( rotY );
calc.rotY.sin = Math.sin( rotY );
points.map( function( point ){ point.step(); } );
}
setup();
anim();
window.addEventListener( 'resize', function(){
w = c.width = window.innerWidth;
h = c.height = window.innerHeight;
opts.vanishPoint.x = w / 2;
opts.vanishPoint.y = h / 2;
})
```

999px

As a PRO member, you can drag-and-drop upload files here to use as resources. Images, Libraries, JSON data... anything you want. You can even edit them anytime, like any other code on CodePen.

Loading
..................

Alt
Opt
Find & Replace

Also see: Tab Triggers