pico 8 3d tutorial
var rotateY3D = function(theta) {
var sin_t = sin(theta);
var cos_t = cos(theta);
for (var n = 0; n < nodes.length; n++) {
var node = nodes[n];
var x = node[0];
var z = node[2];
node[0] = x * cos_t - z * sin_t;
node[2] = z * cos_t + x * sin_t;
}
};