3D Pixel renderer

CSS

body {
    background:white; 
    margin:0px; 
    overflow:hidden; 
}

JavaScript

var canvas = document.createElement('canvas'),
    width = canvas.width = window.innerWidth,
    height = canvas.height = window.innerHeight,
    halfWidth = width / 2,
    halfHeight = height / 2,
    fov = 250,
    offsetX = 0,
    offsetY = 0,
    mouseX = 0,
    mouseY = 0;

var context = canvas.getContext('2d');
document.body.appendChild(canvas);
document.body.addEventListener("mousemove", onMouseMove);


// set up an grid of 3D Pixels in undulating waves
var pixels = []; 

for(var x = -250; x<250; x+=6) { 
    for(var z = -250; z<250; z+=6) { 
        var zOscillation = Math.sin(z*(Math.PI*4/250));
        var xOscillation = Math.sin((x+z)*(Math.PI*2/250));
        var pixel = new Pixel3D(x,(zOscillation+xOscillation)*14+30,z);
        pixels.push(pixel); 
    }
}

// call the render function 30 times a second
setInterval(render, 1000 / 30);


function render() {

    // ease offsetX and offsetY towards the 
    // mouse position (to smooth the "camera" 
    // motion). 
    offsetX += (mouseX - offsetX)*0.1; 
    offsetY += (mouseY - offsetY)*0.1; 

    
    // clear the canvas
    context.clearRect(0, 0, width, height);
    // and get the imagedata out of it
    var imagedata = context.getImageData(0, 0, canvas.width, canvas.height);

    // iterate through every point in the array
    var i = pixels.length;
    while (i--) {
        var pixel = pixels[i];

        // here's the 3D to 2D formula, first work out 
        // scale for that pixel's z position (distance from 
        // camera)
        var scale = fov / (fov + pixel.z);
        // and multiply our 3D x and y to get our
        // 2D x and y. Add halfWidth and halfHeight
        // so that our 2D origin is in the middle of 
        // the screen.
        var x2d = ((pixel.x+offsetX) * scale) + halfWidth; 
        var y2d = ((pixel.y+offsetY) * scale) + halfHeight; 

        // and set that 2D pixel to be green
        setPixel(imagedata, x2d, y2d, 10, 255, 255);

        // add 1 to the z...