3D Pixel renderer - torus

CSS

body {
    background:transparent; 
    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 = 1250,
    mouseX = 120,
    mouseY = 73;

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


// set up a torus shape of pixels
var pixels = []; 

for(var i = 0; i<Math.PI*2-0.0001; i+=Math.PI/90) { 

    for(var j =0;j<Math.PI*2-0.0001; j+=Math.PI/24) { 

                var pixel = new Pixel3D(40,0,0);
                pixel.rotateZ(j);
                pixel.x+=120; 
                pixel.rotateY(i); 
                pixels.push(pixel); 
        
    }
}
    

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


function render() {
    
    // 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 * scale) + halfWidth; 
        var y2d = (pixel.y * scale) + halfHeight; 

        // and add the pixel colour to whatever's there
        // already
        additiveBlendPixel(imagedata, x2d, y2d, 110,203,254); 
        
        // now rotate each 3d pixel around the origin
        // dependent on the mouse position
        pixel.rotateX(mouseY*0.0001); 
        pixel.rotateY(mouseX*0.0001); 


    }

    // and write all those pixel...